<?php
/**
 * A1 Tools Media Management — SEO Audit & Optimization
 *
 * Full media library browser with:
 * - SEO score badges (filename, alt text, file size, usage)
 * - Inline alt text editor
 * - Smart SEO filters (needs rename, missing alt, large files, unused)
 * - Bulk rename with pattern
 * - Bulk alt text
 * - Undo rename
 * - Duplicate detection
 * - Usage tracking
 * - Sort options
 * - Image preview lightbox
 *
 * @package A1_Tools
 * @since   1.9.4
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

class A1Tools_Media_Management {

	private static $instance = null;

	public static function get_instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	private function __construct() {
		add_action( 'wp_ajax_a1tools_load_media',       array( $this, 'ajax_load_media' ) );
		add_action( 'wp_ajax_a1tools_rename_media',     array( $this, 'ajax_rename_media' ) );
		add_action( 'wp_ajax_a1tools_update_media_meta', array( $this, 'ajax_update_media_meta' ) );
		add_action( 'wp_ajax_a1tools_bulk_rename',      array( $this, 'ajax_bulk_rename' ) );
		add_action( 'wp_ajax_a1tools_bulk_update_alt',  array( $this, 'ajax_bulk_update_alt' ) );
		add_action( 'wp_ajax_a1tools_find_duplicates',  array( $this, 'ajax_find_duplicates' ) );
		add_action( 'wp_ajax_a1tools_scan_unused',      array( $this, 'ajax_scan_unused' ) );
		add_action( 'wp_ajax_a1tools_delete_media',     array( $this, 'ajax_delete_media' ) );
		add_action( 'wp_ajax_a1tools_replace_media',    array( $this, 'ajax_replace_media' ) );
		add_action( 'admin_enqueue_scripts',            array( $this, 'enqueue_admin_assets' ) );
	}

	// =========================================================================
	// Admin Assets
	// =========================================================================

	public function enqueue_admin_assets( $hook ) {
		if ( 'a1-tools_page_a1-tools-media-management' !== $hook ) {
			return;
		}
		wp_enqueue_style( 'dashicons' );
		wp_register_style( 'a1tools-media-mgmt', false, array(), A1TOOLS_VERSION );
		wp_enqueue_style( 'a1tools-media-mgmt' );
		wp_add_inline_style( 'a1tools-media-mgmt', $this->get_admin_css() );

		wp_register_script( 'a1tools-media-mgmt', false, array( 'jquery' ), A1TOOLS_VERSION, true );
		wp_enqueue_script( 'a1tools-media-mgmt' );

		wp_localize_script( 'a1tools-media-mgmt', 'a1mm', array(
			'ajax'            => admin_url( 'admin-ajax.php' ),
			'nonceLoad'       => wp_create_nonce( 'a1tools_load_media' ),
			'nonceRename'     => wp_create_nonce( 'a1tools_rename_media' ),
			'nonceMeta'       => wp_create_nonce( 'a1tools_update_media_meta' ),
			'nonceBulkRename' => wp_create_nonce( 'a1tools_bulk_rename' ),
			'nonceBulkAlt'    => wp_create_nonce( 'a1tools_bulk_update_alt' ),
			'nonceDuplicates' => wp_create_nonce( 'a1tools_find_duplicates' ),
			'nonceUnused'     => wp_create_nonce( 'a1tools_scan_unused' ),
			'nonceDelete'     => wp_create_nonce( 'a1tools_delete_media' ),
			'nonceReplace'    => wp_create_nonce( 'a1tools_replace_media' ),
		) );

		wp_add_inline_script( 'a1tools-media-mgmt', $this->get_admin_js() );
	}

	// =========================================================================
	// Helpers
	// =========================================================================

	private function is_random_filename( $name ) {
		$patterns = array(
			'/^(IMG|DSC|DCIM|DSCN|DSCF|SAM|WP|MG|P\d)[-_]/i',
			'/^(Screenshot|Screen[\s_\-]?Shot|Capture|Untitled|File)[-_\s]/i',
			'/^(image|photo|img|pic)[-_]?\d/i',
			'/^[a-f0-9]{8,}$/i',
			'/^[a-f0-9]{8}-[a-f0-9]{4}/i',
			'/^\d{6,}/',
			'/^(IMG|VID|MOV|AUD)[\d_]{6,}/i',
			'/^[A-Z]{2,4}\d{4,}/',
			'/^e[a-f0-9]{20,}/i',
			'/^wp-image-\d+/i',
			'/^cropped-/i',
		);
		foreach ( $patterns as $p ) {
			if ( preg_match( $p, $name ) ) {
				return true;
			}
		}
		return false;
	}

	private function get_batch_usage( $attachment_ids ) {
		if ( empty( $attachment_ids ) ) {
			return array();
		}
		global $wpdb;
		$usage = array_fill_keys( $attachment_ids, 0 );

		// Featured images.
		$placeholders = implode( ',', array_fill( 0, count( $attachment_ids ), '%d' ) );
		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
		$featured = $wpdb->get_col( $wpdb->prepare(
			// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared, WordPress.DB.PreparedSQLPlaceholders.UnfinishedPrepare -- $placeholders is a safe list of %d tokens.
			"SELECT DISTINCT meta_value FROM {$wpdb->postmeta} WHERE meta_key = '_thumbnail_id' AND meta_value IN ($placeholders)",
			...$attachment_ids
		) );
		foreach ( $featured as $fid ) {
			if ( isset( $usage[ (int) $fid ] ) ) {
				$usage[ (int) $fid ] += 1;
			}
		}

		// Post content references (batch by filename).
		foreach ( $attachment_ids as $aid ) {
			$url = wp_get_attachment_url( $aid );
			if ( ! $url ) continue;
			$basename = basename( $url );
			$name_part = pathinfo( $basename, PATHINFO_FILENAME );
			if ( strlen( $name_part ) < 3 ) continue;
			// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
			$count = (int) $wpdb->get_var( $wpdb->prepare(
				"SELECT COUNT(DISTINCT ID) FROM {$wpdb->posts} WHERE post_content LIKE %s AND post_type NOT IN ('revision','attachment','nav_menu_item')",
				'%' . $wpdb->esc_like( $name_part ) . '%'
			) );
			$usage[ $aid ] += $count;
		}

		return $usage;
	}

	// =========================================================================
	// AJAX: Load Media
	// =========================================================================

	public function ajax_load_media() {
		check_ajax_referer( 'a1tools_load_media', 'nonce' );
		if ( ! current_user_can( 'upload_files' ) ) {
			wp_send_json_error( array( 'message' => 'Permission denied.' ) );
		}

		$page       = max( 1, absint( $_POST['page'] ?? 1 ) );
		$per_page   = min( 100, max( 1, absint( $_POST['per_page'] ?? 40 ) ) );
		$search     = sanitize_text_field( wp_unslash( $_POST['search'] ?? '' ) );
		$mime       = sanitize_text_field( wp_unslash( $_POST['mime_filter'] ?? '' ) );
		$seo_filter = sanitize_text_field( wp_unslash( $_POST['seo_filter'] ?? '' ) );
		$orderby    = sanitize_text_field( wp_unslash( $_POST['orderby'] ?? 'date' ) );
		$order      = strtoupper( sanitize_text_field( wp_unslash( $_POST['order'] ?? 'DESC' ) ) );

		if ( ! in_array( $orderby, array( 'date', 'title', 'name', 'modified' ), true ) ) {
			$orderby = 'date';
		}
		if ( ! in_array( $order, array( 'ASC', 'DESC' ), true ) ) {
			$order = 'DESC';
		}

		$args = array(
			'post_type'      => 'attachment',
			'post_status'    => 'inherit',
			'posts_per_page' => $per_page,
			'paged'          => $page,
			'orderby'        => $orderby,
			'order'          => $order,
		);

		if ( ! empty( $search ) ) {
			$args['s'] = $search;
		}
		if ( ! empty( $mime ) ) {
			$args['post_mime_type'] = $mime;
		}

		// SEO filter: missing_alt uses meta_query.
		if ( 'missing_alt' === $seo_filter ) {
			$args['post_mime_type'] = 'image';
			$args['meta_query'] = array( // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query -- required to find images missing alt text.
				'relation' => 'OR',
				array( 'key' => '_wp_attachment_image_alt', 'compare' => 'NOT EXISTS' ),
				array( 'key' => '_wp_attachment_image_alt', 'value' => '', 'compare' => '=' ),
			);
		}

		// For needs_rename, large_files, unused, optimized — we need post__in filtering.
		if ( in_array( $seo_filter, array( 'needs_rename', 'large_files', 'unused', 'optimized' ), true ) ) {
			$filtered_ids = $this->get_filtered_ids( $seo_filter, $mime );
			if ( empty( $filtered_ids ) ) {
				wp_send_json_success( array( 'items' => array(), 'total' => 0, 'pages' => 0, 'current_page' => 1 ) );
			}
			$args['post__in'] = $filtered_ids;
		}

		$query = new WP_Query( $args );
		$ids = wp_list_pluck( $query->posts, 'ID' );
		$usage_map = $this->get_batch_usage( $ids );

		$items = array();
		foreach ( $query->posts as $post ) {
			$filepath  = get_attached_file( $post->ID );
			$filename  = $filepath ? basename( $filepath ) : '';
			$name_only = pathinfo( $filename, PATHINFO_FILENAME );
			$meta      = wp_get_attachment_metadata( $post->ID );
			$thumb     = wp_get_attachment_image_src( $post->ID, 'thumbnail' );
			$filesize  = ( $filepath && file_exists( $filepath ) ) ? filesize( $filepath ) : 0;
			$alt       = get_post_meta( $post->ID, '_wp_attachment_image_alt', true );
			$is_image  = wp_attachment_is_image( $post->ID );
			$is_random = $this->is_random_filename( $name_only );
			$used      = isset( $usage_map[ $post->ID ] ) ? $usage_map[ $post->ID ] : 0;

			$seo = 0;
			if ( ! $is_random ) $seo++;
			if ( ! empty( $alt ) )  $seo++;
			if ( $filesize < 512000 ) $seo++;
			if ( $used > 0 ) $seo++;

			$items[] = array(
				'id'             => $post->ID,
				'title'          => $post->post_title,
				'filename'       => $filename,
				'url'            => wp_get_attachment_url( $post->ID ),
				'thumbnail_url'  => $thumb ? $thumb[0] : wp_mime_type_icon( $post->ID ),
				'is_image'       => $is_image,
				'mime_type'      => $post->post_mime_type,
				'file_size'      => $filesize,
				'file_size_fmt'  => size_format( $filesize ),
				'width'          => isset( $meta['width'] ) ? (int) $meta['width'] : 0,
				'height'         => isset( $meta['height'] ) ? (int) $meta['height'] : 0,
				'date'           => get_the_date( 'Y-m-d', $post ),
				'alt_text'       => $alt ? $alt : '',
				'caption'        => $post->post_excerpt,
				'description'    => $post->post_content,
				'usage_count'    => $used,
				'is_random_name' => $is_random,
				'seo_score'      => $seo,
			);
		}

		wp_send_json_success( array(
			'items'        => $items,
			'total'        => (int) $query->found_posts,
			'pages'        => (int) $query->max_num_pages,
			'current_page' => $page,
		) );
	}

	private function get_filtered_ids( $filter, $mime = '' ) {
		global $wpdb;

		if ( 'needs_rename' === $filter ) {
			if ( ! empty( $mime ) ) {
				// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
				$rows = $wpdb->get_results(
					$wpdb->prepare(
						"SELECT p.ID, pm.meta_value AS filepath FROM {$wpdb->posts} p
						 JOIN {$wpdb->postmeta} pm ON p.ID = pm.post_id AND pm.meta_key = '_wp_attached_file'
						 WHERE p.post_type = 'attachment' AND p.post_status = 'inherit'
						 AND p.post_mime_type LIKE %s",
						$mime . '%'
					)
				);
			} else {
				// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
				$rows = $wpdb->get_results(
					"SELECT p.ID, pm.meta_value AS filepath FROM {$wpdb->posts} p
					 JOIN {$wpdb->postmeta} pm ON p.ID = pm.post_id AND pm.meta_key = '_wp_attached_file'
					 WHERE p.post_type = 'attachment' AND p.post_status = 'inherit'"
				);
			}
			$ids = array();
			foreach ( $rows as $r ) {
				$name = pathinfo( $r->filepath, PATHINFO_FILENAME );
				if ( $this->is_random_filename( $name ) ) {
					$ids[] = (int) $r->ID;
				}
			}
			return $ids;
		}

		if ( 'large_files' === $filter ) {
			if ( ! empty( $mime ) ) {
				// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
				$rows = $wpdb->get_results(
					$wpdb->prepare(
						"SELECT p.ID, pm.meta_value AS filepath FROM {$wpdb->posts} p
						 JOIN {$wpdb->postmeta} pm ON p.ID = pm.post_id AND pm.meta_key = '_wp_attached_file'
						 WHERE p.post_type = 'attachment' AND p.post_status = 'inherit'
						 AND p.post_mime_type LIKE %s",
						$mime . '%'
					)
				);
			} else {
				// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
				$rows = $wpdb->get_results(
					"SELECT p.ID, pm.meta_value AS filepath FROM {$wpdb->posts} p
					 JOIN {$wpdb->postmeta} pm ON p.ID = pm.post_id AND pm.meta_key = '_wp_attached_file'
					 WHERE p.post_type = 'attachment' AND p.post_status = 'inherit'"
				);
			}
			$upload_dir = wp_get_upload_dir();
			$base = trailingslashit( $upload_dir['basedir'] );
			$ids = array();
			foreach ( $rows as $r ) {
				$path = $base . $r->filepath;
				if ( file_exists( $path ) && filesize( $path ) > 512000 ) {
					$ids[] = (int) $r->ID;
				}
			}
			return $ids;
		}

		if ( 'unused' === $filter ) {
			$cached = get_transient( 'a1tools_unused_media_ids' );
			if ( false !== $cached ) {
				return $cached;
			}
			// Get ALL attachment IDs.
			// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
			$all_ids = $wpdb->get_col(
				"SELECT ID FROM {$wpdb->posts} WHERE post_type = 'attachment' AND post_status = 'inherit'"
			);
			// Get featured image IDs.
			// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
			$featured = $wpdb->get_col(
				"SELECT DISTINCT meta_value FROM {$wpdb->postmeta} WHERE meta_key = '_thumbnail_id'"
			);
			$featured = array_map( 'intval', $featured );
			$unused = array();
			foreach ( $all_ids as $aid ) {
				$aid = (int) $aid;
				if ( in_array( $aid, $featured, true ) ) continue;
				$url = wp_get_attachment_url( $aid );
				if ( ! $url ) { $unused[] = $aid; continue; }
				$name_part = pathinfo( basename( $url ), PATHINFO_FILENAME );
				if ( strlen( $name_part ) < 3 ) { $unused[] = $aid; continue; }
				// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
				$found = (int) $wpdb->get_var( $wpdb->prepare(
					"SELECT COUNT(*) FROM {$wpdb->posts} WHERE post_content LIKE %s AND post_type NOT IN ('revision','attachment','nav_menu_item') LIMIT 1",
					'%' . $wpdb->esc_like( $name_part ) . '%'
				) );
				if ( 0 === $found ) {
					$unused[] = $aid;
				}
			}
			set_transient( 'a1tools_unused_media_ids', $unused, 300 );
			return $unused;
		}

		if ( 'optimized' === $filter ) {
			// Get items with good filename, alt text, small size, and used.
			if ( ! empty( $mime ) ) {
				// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
				$rows = $wpdb->get_results(
					$wpdb->prepare(
						"SELECT p.ID, pm.meta_value AS filepath, alt.meta_value AS alt_text
						 FROM {$wpdb->posts} p
						 JOIN {$wpdb->postmeta} pm ON p.ID = pm.post_id AND pm.meta_key = '_wp_attached_file'
						 LEFT JOIN {$wpdb->postmeta} alt ON p.ID = alt.post_id AND alt.meta_key = '_wp_attachment_image_alt'
						 WHERE p.post_type = 'attachment' AND p.post_status = 'inherit'
						 AND p.post_mime_type LIKE %s",
						$mime . '%'
					)
				);
			} else {
				// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
				$rows = $wpdb->get_results(
					"SELECT p.ID, pm.meta_value AS filepath, alt.meta_value AS alt_text
					 FROM {$wpdb->posts} p
					 JOIN {$wpdb->postmeta} pm ON p.ID = pm.post_id AND pm.meta_key = '_wp_attached_file'
					 LEFT JOIN {$wpdb->postmeta} alt ON p.ID = alt.post_id AND alt.meta_key = '_wp_attachment_image_alt'
					 WHERE p.post_type = 'attachment' AND p.post_status = 'inherit'"
				);
			}
			$upload_dir = wp_get_upload_dir();
			$base = trailingslashit( $upload_dir['basedir'] );
			// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
			$featured = $wpdb->get_col( "SELECT DISTINCT meta_value FROM {$wpdb->postmeta} WHERE meta_key = '_thumbnail_id'" );
			$featured = array_map( 'intval', $featured );
			$ids = array();
			foreach ( $rows as $r ) {
				$name = pathinfo( $r->filepath, PATHINFO_FILENAME );
				$score = 0;
				if ( ! $this->is_random_filename( $name ) ) $score++;
				if ( ! empty( $r->alt_text ) ) $score++;
				$path = $base . $r->filepath;
				if ( file_exists( $path ) && filesize( $path ) < 512000 ) $score++;
				// Check usage (simplified).
				if ( in_array( (int) $r->ID, $featured, true ) ) {
					$score++;
				} else {
					$name_part = pathinfo( $r->filepath, PATHINFO_FILENAME );
					if ( strlen( $name_part ) >= 3 ) {
						// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
						$found = (int) $wpdb->get_var( $wpdb->prepare(
							"SELECT COUNT(*) FROM {$wpdb->posts} WHERE post_content LIKE %s AND post_type NOT IN ('revision','attachment','nav_menu_item') LIMIT 1",
							'%' . $wpdb->esc_like( $name_part ) . '%'
						) );
						if ( $found > 0 ) $score++;
					}
				}
				if ( $score >= 4 ) {
					$ids[] = (int) $r->ID;
				}
			}
			return $ids;
		}

		return array();
	}

	// =========================================================================
	// AJAX: Rename Media
	// =========================================================================

	public function ajax_rename_media() {
		check_ajax_referer( 'a1tools_rename_media', 'nonce' );
		if ( ! current_user_can( 'upload_files' ) ) {
			wp_send_json_error( array( 'message' => 'Permission denied.' ) );
		}

		$attachment_id = absint( $_POST['attachment_id'] ?? 0 );
		$new_name      = sanitize_text_field( wp_unslash( $_POST['new_filename'] ?? '' ) );
		$update_refs   = ! empty( $_POST['update_refs'] );

		if ( ! $attachment_id ) {
			wp_send_json_error( array( 'message' => 'Invalid attachment ID.' ) );
		}

		$result = $this->do_rename( $attachment_id, $new_name, $update_refs );
		if ( is_wp_error( $result ) ) {
			wp_send_json_error( array( 'message' => $result->get_error_message() ) );
		}
		wp_send_json_success( $result );
	}

	// =========================================================================
	// AJAX: Update Media Meta (alt, title)
	// =========================================================================

	public function ajax_update_media_meta() {
		check_ajax_referer( 'a1tools_update_media_meta', 'nonce' );
		if ( ! current_user_can( 'upload_files' ) ) {
			wp_send_json_error( array( 'message' => 'Permission denied.' ) );
		}

		$id = absint( $_POST['attachment_id'] ?? 0 );
		if ( ! $id ) {
			wp_send_json_error( array( 'message' => 'Invalid attachment ID.' ) );
		}

		// Alt text.
		if ( isset( $_POST['alt_text'] ) ) {
			update_post_meta( $id, '_wp_attachment_image_alt', sanitize_text_field( wp_unslash( $_POST['alt_text'] ) ) );
		}

		// Title, caption, description.
		$update = array( 'ID' => $id );
		if ( isset( $_POST['title'] ) ) {
			$update['post_title'] = sanitize_text_field( wp_unslash( $_POST['title'] ) );
		}
		if ( isset( $_POST['caption'] ) ) {
			$update['post_excerpt'] = sanitize_text_field( wp_unslash( $_POST['caption'] ) );
		}
		if ( isset( $_POST['description'] ) ) {
			$update['post_content'] = wp_kses_post( wp_unslash( $_POST['description'] ) );
		}
		if ( count( $update ) > 1 ) {
			wp_update_post( $update );
		}

		wp_send_json_success( array( 'message' => 'Saved.' ) );
	}

	// =========================================================================
	// AJAX: Bulk Rename
	// =========================================================================

	public function ajax_bulk_rename() {
		check_ajax_referer( 'a1tools_bulk_rename', 'nonce' );
		if ( ! current_user_can( 'upload_files' ) ) {
			wp_send_json_error( array( 'message' => 'Permission denied.' ) );
		}

		$ids         = array_map( 'absint', (array) ( $_POST['ids'] ?? array() ) );
		$pattern     = sanitize_text_field( wp_unslash( $_POST['pattern'] ?? '' ) );
		$start       = max( 1, absint( $_POST['start_num'] ?? 1 ) );
		$update_refs = ! empty( $_POST['update_refs'] );

		if ( empty( $ids ) || empty( $pattern ) ) {
			wp_send_json_error( array( 'message' => 'Select items and enter a pattern.' ) );
		}

		$results  = array();
		$success  = 0;
		$failed   = 0;
		$counter  = $start;

		foreach ( $ids as $id ) {
			$name = str_replace( '{n}', $counter, $pattern );
			$res  = $this->do_rename( $id, $name, $update_refs );
			if ( is_wp_error( $res ) ) {
				$results[] = array( 'id' => $id, 'error' => $res->get_error_message() );
				$failed++;
			} else {
				$results[] = array( 'id' => $id, 'new_filename' => $res['new_filename'] );
				$success++;
			}
			$counter++;
		}

		wp_send_json_success( array(
			'results' => $results,
			'success' => $success,
			'failed'  => $failed,
			'message' => sprintf( '%d renamed, %d failed.', $success, $failed ),
		) );
	}

	// =========================================================================
	// AJAX: Bulk Update Alt Text
	// =========================================================================

	public function ajax_bulk_update_alt() {
		check_ajax_referer( 'a1tools_bulk_update_alt', 'nonce' );
		if ( ! current_user_can( 'upload_files' ) ) {
			wp_send_json_error( array( 'message' => 'Permission denied.' ) );
		}

		$ids     = array_map( 'absint', (array) ( $_POST['ids'] ?? array() ) );
		$pattern = sanitize_text_field( wp_unslash( $_POST['alt_pattern'] ?? '' ) );

		if ( empty( $ids ) || empty( $pattern ) ) {
			wp_send_json_error( array( 'message' => 'Select items and enter alt text.' ) );
		}

		$count = 0;
		foreach ( $ids as $id ) {
			$filepath = get_attached_file( $id );
			$fname    = $filepath ? pathinfo( basename( $filepath ), PATHINFO_FILENAME ) : '';
			$alt = str_replace( '{filename}', ucwords( str_replace( '-', ' ', $fname ) ), $pattern );
			update_post_meta( $id, '_wp_attachment_image_alt', $alt );
			$count++;
		}

		wp_send_json_success( array( 'message' => sprintf( 'Alt text updated for %d items.', $count ), 'count' => $count ) );
	}

	// =========================================================================
	// AJAX: Find Duplicates
	// =========================================================================

	public function ajax_find_duplicates() {
		check_ajax_referer( 'a1tools_find_duplicates', 'nonce' );
		if ( ! current_user_can( 'upload_files' ) ) {
			wp_send_json_error( array( 'message' => 'Permission denied.' ) );
		}

		global $wpdb;
		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
		$rows = $wpdb->get_results(
			"SELECT p.ID, pm.meta_value AS filepath FROM {$wpdb->posts} p
			 JOIN {$wpdb->postmeta} pm ON p.ID = pm.post_id AND pm.meta_key = '_wp_attached_file'
			 WHERE p.post_type = 'attachment' AND p.post_status = 'inherit'"
		);

		$upload_dir = wp_get_upload_dir();
		$base = trailingslashit( $upload_dir['basedir'] );

		// Group by file size.
		$size_groups = array();
		foreach ( $rows as $r ) {
			$path = $base . $r->filepath;
			if ( ! file_exists( $path ) ) continue;
			$size = filesize( $path );
			if ( $size < 1000 ) continue; // Skip tiny files.
			$size_groups[ $size ][] = array( 'id' => (int) $r->ID, 'path' => $path, 'filepath' => $r->filepath );
		}

		// For groups with 2+ files of same size, compare hashes.
		$duplicates = array();
		foreach ( $size_groups as $size => $files ) {
			if ( count( $files ) < 2 ) continue;
			$hash_groups = array();
			foreach ( $files as $f ) {
				$hash = md5_file( $f['path'] );
				$hash_groups[ $hash ][] = $f;
			}
			foreach ( $hash_groups as $hash => $group ) {
				if ( count( $group ) < 2 ) continue;
				$dup_items = array();
				foreach ( $group as $g ) {
					$thumb = wp_get_attachment_image_src( $g['id'], 'thumbnail' );
					$dup_items[] = array(
						'id'        => $g['id'],
						'filename'  => basename( $g['filepath'] ),
						'url'       => wp_get_attachment_url( $g['id'] ),
						'thumb'     => $thumb ? $thumb[0] : '',
						'size_fmt'  => size_format( $size ),
					);
				}
				$duplicates[] = array( 'size' => $size, 'hash' => $hash, 'files' => $dup_items );
			}
		}

		wp_send_json_success( array(
			'groups'  => $duplicates,
			'count'   => count( $duplicates ),
			'message' => count( $duplicates ) ? sprintf( 'Found %d duplicate groups.', count( $duplicates ) ) : 'No duplicates found.',
		) );
	}

	// =========================================================================
	// AJAX: Scan Unused
	// =========================================================================

	public function ajax_scan_unused() {
		check_ajax_referer( 'a1tools_scan_unused', 'nonce' );
		if ( ! current_user_can( 'upload_files' ) ) {
			wp_send_json_error( array( 'message' => 'Permission denied.' ) );
		}

		delete_transient( 'a1tools_unused_media_ids' );
		$unused = $this->get_filtered_ids( 'unused' );
		wp_send_json_success( array(
			'count'   => count( $unused ),
			'message' => count( $unused ) ? sprintf( 'Found %d unused media files.', count( $unused ) ) : 'All media files are in use.',
		) );
	}

	// =========================================================================
	// AJAX: Delete Media
	// =========================================================================

	public function ajax_delete_media() {
		check_ajax_referer( 'a1tools_delete_media', 'nonce' );
		if ( ! current_user_can( 'delete_posts' ) ) {
			wp_send_json_error( array( 'message' => 'Permission denied.' ) );
		}

		$id = absint( $_POST['attachment_id'] ?? 0 );
		if ( ! $id ) {
			wp_send_json_error( array( 'message' => 'Invalid attachment ID.' ) );
		}

		$post = get_post( $id );
		if ( ! $post || 'attachment' !== $post->post_type ) {
			wp_send_json_error( array( 'message' => 'Attachment not found.' ) );
		}

		$deleted = wp_delete_attachment( $id, true );
		if ( ! $deleted ) {
			wp_send_json_error( array( 'message' => 'Could not delete the file.' ) );
		}

		wp_send_json_success( array( 'message' => 'File deleted.', 'id' => $id ) );
	}

	// =========================================================================
	// AJAX: Replace Media File
	// =========================================================================

	public function ajax_replace_media() {
		check_ajax_referer( 'a1tools_replace_media', 'nonce' );
		if ( ! current_user_can( 'upload_files' ) ) {
			wp_send_json_error( array( 'message' => 'Permission denied.' ) );
		}

		$id = absint( $_POST['attachment_id'] ?? 0 );
		if ( ! $id ) {
			wp_send_json_error( array( 'message' => 'Invalid attachment ID.' ) );
		}

		$post = get_post( $id );
		if ( ! $post || 'attachment' !== $post->post_type ) {
			wp_send_json_error( array( 'message' => 'Attachment not found.' ) );
		}

		if ( empty( $_FILES['file'] ) ) {
			wp_send_json_error( array( 'message' => 'No file uploaded.' ) );
		}

		require_once ABSPATH . 'wp-admin/includes/file.php';
		require_once ABSPATH . 'wp-admin/includes/image.php';
		require_once ABSPATH . 'wp-admin/includes/media.php';

		// Upload file to a temporary location.
		$upload = wp_handle_upload( $_FILES['file'], array( 'test_form' => false ) );
		if ( isset( $upload['error'] ) ) {
			wp_send_json_error( array( 'message' => $upload['error'] ) );
		}

		global $wpdb;

		$old_file   = get_attached_file( $id );
		$old_meta   = wp_get_attachment_metadata( $id );
		$upload_dir = wp_upload_dir();
		$old_dir    = dirname( $old_file );

		// Delete old thumbnails.
		if ( ! empty( $old_meta['sizes'] ) ) {
			foreach ( $old_meta['sizes'] as $size_data ) {
				$thumb_path = trailingslashit( $old_dir ) . $size_data['file'];
				if ( file_exists( $thumb_path ) ) {
					wp_delete_file( $thumb_path );
				}
			}
		}
		// Delete old original-image backup if exists.
		if ( ! empty( $old_meta['original_image'] ) ) {
			$orig_path = trailingslashit( $old_dir ) . $old_meta['original_image'];
			if ( file_exists( $orig_path ) ) {
				wp_delete_file( $orig_path );
			}
		}
		// Delete old main file.
		if ( file_exists( $old_file ) ) {
			wp_delete_file( $old_file );
		}

		// Keep same base name, allow extension to change.
		$old_name     = pathinfo( $old_file, PATHINFO_FILENAME );
		$old_ext      = pathinfo( $old_file, PATHINFO_EXTENSION );
		$new_ext      = pathinfo( $upload['file'], PATHINFO_EXTENSION );
		$new_basename = $old_name . '.' . $new_ext;
		$new_file     = trailingslashit( $old_dir ) . $new_basename;

		// Ensure target directory exists.
		wp_mkdir_p( $old_dir );

		// Move uploaded file to old location.
		if ( ! $this->move_file( $upload['file'], $new_file ) ) {
			wp_send_json_error( array( 'message' => 'Could not move uploaded file.' ) );
		}

		// Update _wp_attached_file.
		$relative = ltrim( str_replace( wp_normalize_path( $upload_dir['basedir'] ), '', wp_normalize_path( $new_file ) ), '/\\' );
		update_post_meta( $id, '_wp_attached_file', $relative );

		// Regenerate all thumbnails.
		$new_meta = wp_generate_attachment_metadata( $id, $new_file );
		wp_update_attachment_metadata( $id, $new_meta );

		// Update MIME type and GUID.
		$new_mime = $upload['type'];
		$new_url  = $upload_dir['baseurl'] . '/' . $relative;

		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
		$wpdb->update(
			$wpdb->posts,
			array(
				'post_mime_type' => $new_mime,
				'guid'          => $new_url,
			),
			array( 'ID' => $id )
		);

		// If extension changed and update_refs is on, update references.
		$update_refs = ! empty( $_POST['update_refs'] );
		if ( $update_refs && strtolower( $old_ext ) !== strtolower( $new_ext ) ) {
			$old_relative = ltrim( str_replace( wp_normalize_path( $upload_dir['basedir'] ), '', wp_normalize_path( $old_file ) ), '/\\' );
			$old_url      = $upload_dir['baseurl'] . '/' . $old_relative;

			// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
			$posts_with_ref = $wpdb->get_col( $wpdb->prepare(
				"SELECT ID FROM {$wpdb->posts} WHERE post_content LIKE %s AND post_type NOT IN ('revision','attachment')",
				'%' . $wpdb->esc_like( $old_url ) . '%'
			) );
			foreach ( $posts_with_ref as $pid ) {
				$content = get_post_field( 'post_content', $pid );
				$content = str_replace( $old_url, $new_url, $content );
				wp_update_post( array( 'ID' => $pid, 'post_content' => $content ) );
			}
		}

		// Thumbnail for card update.
		$thumb_src = wp_get_attachment_image_src( $id, 'thumbnail' );

		wp_send_json_success( array(
			'message'       => 'File replaced successfully.',
			'filename'      => $new_basename,
			'url'           => $new_url,
			'thumbnail_url' => $thumb_src ? $thumb_src[0] : '',
			'mime_type'     => $new_mime,
			'file_size'     => filesize( $new_file ),
			'file_size_fmt' => size_format( filesize( $new_file ) ),
			'width'         => $new_meta['width'] ?? 0,
			'height'        => $new_meta['height'] ?? 0,
		) );
	}

	// =========================================================================
	// Rename Logic (preserved from v1)
	// =========================================================================

	private function sanitize_seo_filename( $name ) {
		$name = strtolower( $name );
		$name = preg_replace( '/[\s_]+/', '-', $name );
		$name = preg_replace( '/[^a-z0-9\-]/', '', $name );
		$name = preg_replace( '/-+/', '-', $name );
		return trim( $name, '-' );
	}

	private function get_unique_filename( $dir, $basename ) {
		if ( ! file_exists( trailingslashit( $dir ) . $basename ) ) {
			return $basename;
		}
		$name = pathinfo( $basename, PATHINFO_FILENAME );
		$ext  = pathinfo( $basename, PATHINFO_EXTENSION );
		$i = 2;
		while ( file_exists( trailingslashit( $dir ) . $name . '-' . $i . '.' . $ext ) ) {
			$i++;
		}
		return $name . '-' . $i . '.' . $ext;
	}

	/**
	 * Move/rename a file using WP_Filesystem instead of PHP rename().
	 *
	 * @param string $from Source path.
	 * @param string $to   Destination path.
	 * @return bool True on success, false on failure.
	 */
	private function move_file( $from, $to ) {
		global $wp_filesystem;
		if ( empty( $wp_filesystem ) ) {
			require_once ABSPATH . 'wp-admin/includes/file.php';
			WP_Filesystem();
		}
		return $wp_filesystem->move( $from, $to, true );
	}

	private function do_rename( $attachment_id, $new_name, $update_refs = false ) {
		$post = get_post( $attachment_id );
		if ( ! $post || 'attachment' !== $post->post_type ) {
			return new WP_Error( 'invalid', 'Attachment not found.' );
		}

		$lock_key = 'a1tools_rename_lock_' . $attachment_id;
		if ( get_transient( $lock_key ) ) {
			return new WP_Error( 'locked', 'File is being renamed. Try again.' );
		}
		set_transient( $lock_key, true, 30 );

		$old_filepath = get_attached_file( $attachment_id );
		if ( ! $old_filepath || ! file_exists( $old_filepath ) ) {
			delete_transient( $lock_key );
			return new WP_Error( 'missing', 'Original file not found on disk.' );
		}

		$upload_dir = wp_get_upload_dir();
		$dir        = dirname( $old_filepath );
		$old_ext    = strtolower( pathinfo( $old_filepath, PATHINFO_EXTENSION ) );
		$old_name   = pathinfo( $old_filepath, PATHINFO_FILENAME );

		$new_name = $this->sanitize_seo_filename( $new_name );
		if ( empty( $new_name ) ) {
			delete_transient( $lock_key );
			return new WP_Error( 'empty', 'Filename cannot be empty after sanitization.' );
		}
		if ( $new_name === $old_name ) {
			delete_transient( $lock_key );
			return new WP_Error( 'same', 'New filename is the same as current.' );
		}

		$real_dir     = realpath( $dir );
		$real_uploads = realpath( $upload_dir['basedir'] );
		if ( false === $real_dir || false === $real_uploads || 0 !== strpos( $real_dir, $real_uploads ) ) {
			delete_transient( $lock_key );
			return new WP_Error( 'security', 'File is outside uploads directory.' );
		}

		$new_basename = $this->get_unique_filename( $dir, $new_name . '.' . $old_ext );
		$new_name     = pathinfo( $new_basename, PATHINFO_FILENAME );
		$new_filepath = trailingslashit( $dir ) . $new_basename;

		$old_relative = get_post_meta( $attachment_id, '_wp_attached_file', true );
		$old_url      = trailingslashit( $upload_dir['baseurl'] ) . $old_relative;
		$metadata     = wp_get_attachment_metadata( $attachment_id );
		$old_sizes    = ( is_array( $metadata ) && ! empty( $metadata['sizes'] ) ) ? $metadata['sizes'] : array();

		if ( ! $this->move_file( $old_filepath, $new_filepath ) ) {
			delete_transient( $lock_key );
			return new WP_Error( 'disk', 'Could not rename file on disk.' );
		}

		$renamed_sizes = array();
		foreach ( $old_sizes as $sk => $sd ) {
			$otp = trailingslashit( $dir ) . $sd['file'];
			$ntf = str_replace( $old_name, $new_name, $sd['file'] );
			$ntp = trailingslashit( $dir ) . $ntf;
			if ( file_exists( $otp ) ) { $this->move_file( $otp, $ntp ); }
			$renamed_sizes[ $sk ] = $ntf;
		}

		if ( is_array( $metadata ) && ! empty( $metadata['original_image'] ) ) {
			$old_orig = $metadata['original_image'];
			$new_orig = str_replace( $old_name, $new_name, $old_orig );
			$oop = trailingslashit( $dir ) . $old_orig;
			$nop = trailingslashit( $dir ) . $new_orig;
			if ( file_exists( $oop ) ) { $this->move_file( $oop, $nop ); }
			$metadata['original_image'] = $new_orig;
		}

		$new_relative = str_replace( basename( $old_relative ), $new_basename, $old_relative );
		update_post_meta( $attachment_id, '_wp_attached_file', $new_relative );

		if ( is_array( $metadata ) ) {
			$metadata['file'] = $new_relative;
			foreach ( $renamed_sizes as $sk => $ntf ) {
				if ( isset( $metadata['sizes'][ $sk ] ) ) {
					$metadata['sizes'][ $sk ]['file'] = $ntf;
				}
			}
			wp_update_attachment_metadata( $attachment_id, $metadata );
		}

		$new_url = trailingslashit( $upload_dir['baseurl'] ) . $new_relative;
		global $wpdb;
		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
		$wpdb->update( $wpdb->posts, array( 'guid' => $new_url ), array( 'ID' => $attachment_id ) );

		wp_update_post( array(
			'ID'         => $attachment_id,
			'post_title' => ucwords( str_replace( '-', ' ', $new_name ) ),
			'post_name'  => $new_name,
		) );

		$refs_updated = 0;
		if ( $update_refs ) {
			// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
			$refs_updated += (int) $wpdb->query( $wpdb->prepare(
				"UPDATE {$wpdb->posts} SET post_content = REPLACE(post_content, %s, %s) WHERE post_content LIKE %s AND ID != %d",
				$old_url, $new_url, '%' . $wpdb->esc_like( $old_url ) . '%', $attachment_id
			) );

			$sub_dir = dirname( $old_relative );
			foreach ( $old_sizes as $sk => $sd ) {
				if ( ! isset( $renamed_sizes[ $sk ] ) ) continue;
				$osu = trailingslashit( $upload_dir['baseurl'] ) . trailingslashit( $sub_dir ) . $sd['file'];
				$nsu = trailingslashit( $upload_dir['baseurl'] ) . trailingslashit( $sub_dir ) . $renamed_sizes[ $sk ];
				// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
				$wpdb->query( $wpdb->prepare(
					"UPDATE {$wpdb->posts} SET post_content = REPLACE(post_content, %s, %s) WHERE post_content LIKE %s",
					$osu, $nsu, '%' . $wpdb->esc_like( $osu ) . '%'
				) );
			}
			// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
			$wpdb->query( $wpdb->prepare(
				"UPDATE {$wpdb->postmeta} SET meta_value = REPLACE(meta_value, %s, %s) WHERE meta_value LIKE %s",
				$old_url, $new_url, '%' . $wpdb->esc_like( $old_url ) . '%'
			) );
			foreach ( $old_sizes as $sk => $sd ) {
				if ( ! isset( $renamed_sizes[ $sk ] ) ) continue;
				$osu = trailingslashit( $upload_dir['baseurl'] ) . trailingslashit( $sub_dir ) . $sd['file'];
				$nsu = trailingslashit( $upload_dir['baseurl'] ) . trailingslashit( $sub_dir ) . $renamed_sizes[ $sk ];
				// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
				$wpdb->query( $wpdb->prepare(
					"UPDATE {$wpdb->postmeta} SET meta_value = REPLACE(meta_value, %s, %s) WHERE meta_value LIKE %s",
					$osu, $nsu, '%' . $wpdb->esc_like( $osu ) . '%'
				) );
			}
		}

		clean_post_cache( $attachment_id );
		delete_transient( $lock_key );

		$new_thumb_url = $new_url;
		if ( ! empty( $renamed_sizes['thumbnail'] ) ) {
			$new_thumb_url = trailingslashit( $upload_dir['baseurl'] ) . trailingslashit( dirname( $new_relative ) ) . $renamed_sizes['thumbnail'];
		}

		return array(
			'attachment_id'     => $attachment_id,
			'old_filename'      => basename( $old_relative ),
			'new_filename'      => $new_basename,
			'new_url'           => $new_url,
			'new_thumbnail_url' => $new_thumb_url,
			'new_title'         => ucwords( str_replace( '-', ' ', $new_name ) ),
			'refs_updated'      => $refs_updated,
			'message'           => 'File renamed successfully.',
		);
	}

	// =========================================================================
	// Page Rendering
	// =========================================================================

	public function render_page() {
		?>
		<div class="wrap">
			<h1><?php esc_html_e( 'Media Management', 'a1-tools' ); ?></h1>
			<p class="description"><?php esc_html_e( 'Rename files, optimize alt text, and audit your media library for SEO.', 'a1-tools' ); ?></p>

			<!-- Toolbar Row 1: Search + Filters -->
			<div class="a1mm-toolbar">
				<input type="text" id="a1mm-search" placeholder="<?php esc_attr_e( 'Search media...', 'a1-tools' ); ?>" />
				<select id="a1mm-mime-filter">
					<option value="">All Types</option>
					<option value="image">Images</option>
					<option value="application/pdf">PDFs</option>
					<option value="video">Videos</option>
					<option value="audio">Audio</option>
				</select>
				<select id="a1mm-seo-filter">
					<option value="">All Items</option>
					<option value="needs_rename">Needs Rename</option>
					<option value="missing_alt">Missing Alt Text</option>
					<option value="large_files">Large Files (&gt;500KB)</option>
					<option value="unused">Unused Media</option>
					<option value="optimized">SEO Optimized</option>
				</select>
				<select id="a1mm-sort">
					<option value="date-DESC">Newest First</option>
					<option value="date-ASC">Oldest First</option>
					<option value="title-ASC">Name A-Z</option>
					<option value="title-DESC">Name Z-A</option>
				</select>
				<button type="button" class="button" id="a1mm-search-btn">Search</button>
				<button type="button" class="button" id="a1mm-duplicates-btn" title="Find duplicate files"><span class="dashicons dashicons-admin-page" style="vertical-align:middle;margin-top:-2px;"></span> Duplicates</button>
				<span id="a1mm-status" class="a1mm-status"></span>
			</div>

			<!-- Toolbar Row 2: Bulk Actions -->
			<div class="a1mm-bulk-bar" id="a1mm-bulk-bar" style="display:none;">
				<label class="a1mm-select-all-label"><input type="checkbox" id="a1mm-select-all" /> Select All</label>
				<span id="a1mm-selected-count">0 selected</span>
				<span class="a1mm-bulk-sep">|</span>
				<input type="text" id="a1mm-bulk-pattern" placeholder="pattern-{n}" class="a1mm-bulk-input" />
				<button type="button" class="button button-primary" id="a1mm-bulk-rename-btn">Bulk Rename</button>
				<span class="a1mm-bulk-sep">|</span>
				<input type="text" id="a1mm-bulk-alt" placeholder="Alt text or {filename}" class="a1mm-bulk-input" />
				<button type="button" class="button button-primary" id="a1mm-bulk-alt-btn">Set Alt</button>
			</div>

			<!-- Media List -->
			<div id="a1mm-list"></div>

			<!-- Loading -->
			<div id="a1mm-loading" style="display:none;text-align:center;padding:40px;">
				<span class="spinner is-active" style="float:none;"></span>
				<p>Loading media...</p>
			</div>

			<!-- Empty State -->
			<div id="a1mm-empty" style="display:none;text-align:center;padding:40px;color:#666;">
				<p>No media items found.</p>
			</div>

			<!-- Duplicates Modal -->
			<div id="a1mm-dup-overlay" class="a1mm-overlay" style="display:none;">
				<div class="a1mm-modal">
					<div class="a1mm-modal-header">
						<h2>Duplicate Files</h2>
						<span class="a1mm-modal-close">&times;</span>
					</div>
					<div id="a1mm-dup-content" class="a1mm-modal-body"><p>Scanning...</p></div>
				</div>
			</div>

			<!-- Pagination -->
			<div id="a1mm-pagination" class="a1mm-pagination"></div>

			<!-- Lightbox -->
			<div id="a1mm-lightbox" class="a1mm-lightbox">
				<span class="a1mm-lightbox-close">&times;</span>
				<img id="a1mm-lightbox-img" src="" alt="" />
				<div class="a1mm-lightbox-filename" id="a1mm-lightbox-name"></div>
			</div>
		</div>
		<?php
	}

	// =========================================================================
	// Inline CSS
	// =========================================================================

	private function get_admin_css() {
		return '
		/* Toolbar */
		.a1mm-toolbar { display:flex; align-items:center; gap:8px; margin:16px 0 8px; flex-wrap:wrap; }
		#a1mm-search { width:240px; padding:6px 10px; }
		#a1mm-mime-filter, #a1mm-seo-filter, #a1mm-sort { padding:6px 10px; min-width:150px; }
		.a1mm-status { margin-left:12px; color:#666; font-style:italic; }

		/* Bulk Bar */
		.a1mm-bulk-bar { display:flex; align-items:center; gap:8px; padding:10px 14px; background:#f0f6fc; border:1px solid #c3d9ed; border-radius:6px; margin-bottom:12px; flex-wrap:wrap; }
		.a1mm-select-all-label { font-weight:600; font-size:13px; cursor:pointer; display:inline-flex; align-items:center; gap:4px; }
		#a1mm-selected-count { font-size:13px; color:#2271b1; font-weight:600; }
		.a1mm-bulk-sep { color:#c3d9ed; font-size:18px; }
		.a1mm-bulk-input { width:180px; padding:5px 8px; font-size:13px; }

		/* Items */
		.a1mm-item { display:flex; align-items:flex-start; gap:12px; padding:14px; border:1px solid #e0e0e0; border-radius:6px; margin-bottom:6px; background:#fff; transition:border-color 0.2s; position:relative; }
		.a1mm-item:hover { border-color:#2271b1; }
		.a1mm-item.a1mm-renamed { border-color:#00a32a; background:#f0faf0; }

		/* Checkbox */
		.a1mm-item-cb { margin-top:4px; }

		/* Thumbnail */
		.a1mm-thumb { flex-shrink:0; width:72px; height:72px; border-radius:4px; overflow:hidden; background:#f0f0f0; display:flex; align-items:center; justify-content:center; }
		.a1mm-thumb img { width:100%; height:100%; object-fit:cover; display:block; }
		.a1mm-thumb .dashicons { font-size:32px; width:32px; height:32px; color:#999; }
		.a1mm-thumb.a1mm-clickable { cursor:pointer; }
		.a1mm-thumb.a1mm-clickable:hover { opacity:0.8; }

		/* Info */
		.a1mm-info { flex:1; min-width:0; }
		.a1mm-top-row { display:flex; align-items:center; justify-content:space-between; margin-bottom:2px; }
		.a1mm-current code { font-size:13px; background:#f0f0f1; padding:2px 6px; border-radius:3px; word-break:break-all; }
		.a1mm-meta { font-size:12px; color:#888; margin-bottom:4px; }

		/* Badges */
		.a1mm-badges { display:flex; gap:6px; flex-wrap:wrap; margin-bottom:6px; }
		.a1mm-badge { font-size:11px; padding:2px 8px; border-radius:10px; font-weight:600; white-space:nowrap; }
		.a1mm-badge-seo-good { background:#d4edda; color:#155724; }
		.a1mm-badge-seo-warn { background:#fff3cd; color:#856404; }
		.a1mm-badge-seo-bad { background:#f8d7da; color:#721c24; }
		.a1mm-badge-random { background:#fff3cd; color:#856404; }
		.a1mm-badge-no-alt { background:#f8d7da; color:#721c24; }
		.a1mm-badge-large { background:#f8d7da; color:#721c24; }
		.a1mm-badge-unused { background:#e2e3e5; color:#383d41; }
		.a1mm-badge-used { background:#d4edda; color:#155724; }

		/* Field Rows */
		.a1mm-field-row { display:flex; align-items:flex-start; gap:8px; margin-bottom:5px; }
		.a1mm-field-label { width:80px; flex-shrink:0; font-size:12px; color:#555; font-weight:600; padding-top:6px; text-align:right; white-space:nowrap; }
		.a1mm-field-input-wrap { flex:1; display:flex; align-items:center; gap:4px; flex-wrap:wrap; min-width:0; }

		/* Ext label */
		.a1mm-ext { font-size:13px; color:#666; font-family:monospace; flex-shrink:0; }

		/* Meta Inputs — full width */
		.a1mm-meta-input { flex:1; min-width:0; padding:5px 8px; font-size:13px; }
		.a1mm-new-name { font-family:monospace; }
		textarea.a1mm-meta-input { resize:vertical; font-family:inherit; }

		/* Actions Row */
		.a1mm-actions-row { gap:8px !important; }
		.a1mm-refs-label { font-size:12px; color:#555; cursor:pointer; display:inline-flex; align-items:center; gap:3px; margin-right:4px; }
		.a1mm-item-msg { font-size:12px; margin-left:4px; }
		.a1mm-item-msg.success { color:#00a32a; }
		.a1mm-item-msg.error { color:#d63638; }
		.a1mm-undo-link { font-size:12px; color:#2271b1; cursor:pointer; margin-left:4px; text-decoration:underline; }
		.a1mm-undo-link:hover { color:#135e96; }
		.a1mm-delete-btn { color:#b32d2e !important; border-color:#b32d2e !important; }
		.a1mm-delete-btn:hover { background:#b32d2e !important; color:#fff !important; }
		.a1mm-meta-msg { font-size:12px; margin-left:4px; }
		.a1mm-meta-msg.success { color:#00a32a; }
		.a1mm-meta-msg.error { color:#d63638; }

		/* Pagination */
		.a1mm-pagination { display:flex; align-items:center; justify-content:center; gap:8px; padding:16px 0; }
		.a1mm-pagination .a1mm-page-info { font-size:13px; color:#555; }

		/* Lightbox */
		.a1mm-lightbox { display:none; position:fixed; top:0; left:0; width:100%; height:100%; background:rgba(0,0,0,0.85); z-index:100000; justify-content:center; align-items:center; cursor:pointer; }
		.a1mm-lightbox.active { display:flex; }
		.a1mm-lightbox img { max-width:90%; max-height:90%; border-radius:6px; box-shadow:0 4px 40px rgba(0,0,0,0.5); }
		.a1mm-lightbox-close { position:absolute; top:20px; right:30px; color:#fff; font-size:36px; font-weight:bold; cursor:pointer; line-height:1; text-shadow:0 1px 4px rgba(0,0,0,0.5); }
		.a1mm-lightbox-close:hover { color:#ddd; }
		.a1mm-lightbox-filename { position:absolute; bottom:20px; left:50%; transform:translateX(-50%); color:#fff; font-size:14px; background:rgba(0,0,0,0.6); padding:6px 16px; border-radius:4px; max-width:80%; text-align:center; word-break:break-all; }

		/* Modal/Overlay */
		.a1mm-overlay { position:fixed; top:0; left:0; width:100%; height:100%; background:rgba(0,0,0,0.6); z-index:99999; display:flex; justify-content:center; align-items:center; }
		.a1mm-modal { background:#fff; border-radius:8px; width:90%; max-width:800px; max-height:80vh; display:flex; flex-direction:column; box-shadow:0 8px 40px rgba(0,0,0,0.3); }
		.a1mm-modal-header { display:flex; justify-content:space-between; align-items:center; padding:16px 20px; border-bottom:1px solid #e0e0e0; }
		.a1mm-modal-header h2 { margin:0; font-size:18px; }
		.a1mm-modal-close { font-size:28px; cursor:pointer; color:#666; line-height:1; }
		.a1mm-modal-close:hover { color:#333; }
		.a1mm-modal-body { padding:20px; overflow-y:auto; flex:1; }
		.a1mm-dup-group { border:1px solid #e0e0e0; border-radius:6px; padding:12px; margin-bottom:12px; }
		.a1mm-dup-group h3 { margin:0 0 8px; font-size:14px; color:#666; }
		.a1mm-dup-file { display:flex; align-items:center; gap:10px; padding:6px 0; border-top:1px solid #f0f0f0; }
		.a1mm-dup-file:first-of-type { border-top:none; }
		.a1mm-dup-thumb { width:48px; height:48px; border-radius:4px; overflow:hidden; background:#f0f0f0; flex-shrink:0; }
		.a1mm-dup-thumb img { width:100%; height:100%; object-fit:cover; }
		.a1mm-dup-name { font-family:monospace; font-size:13px; word-break:break-all; }
		.a1mm-dup-id { font-size:11px; color:#888; }
		';
	}

	// =========================================================================
	// Inline JS (nowdoc)
	// =========================================================================

	private function get_admin_js() {
		return <<<'JSEOF'
(function($){
'use strict';

var currentPage = 1, perPage = 40, selected = {};

function esc(s) { var d=document.createElement('div'); d.textContent=s; return d.innerHTML; }
function escA(s) { return s.replace(/&/g,'&amp;').replace(/"/g,'&quot;').replace(/'/g,'&#39;').replace(/</g,'&lt;').replace(/>/g,'&gt;'); }

// ---- Load Media ----
function loadMedia(page) {
	currentPage = page || 1;
	selected = {};
	updateBulk();
	$('#a1mm-select-all').prop('checked', false);
	$('#a1mm-list').empty();
	$('#a1mm-pagination').empty();
	$('#a1mm-empty').hide();
	$('#a1mm-loading').show();

	var sv = $('#a1mm-sort').val().split('-');

	$.post(a1mm.ajax, {
		action:      'a1tools_load_media',
		nonce:       a1mm.nonceLoad,
		page:        currentPage,
		per_page:    perPage,
		search:      $('#a1mm-search').val(),
		mime_filter: $('#a1mm-mime-filter').val(),
		seo_filter:  $('#a1mm-seo-filter').val(),
		orderby:     sv[0],
		order:       sv[1]
	}, function(r) {
		$('#a1mm-loading').hide();
		if (!r || !r.success) {
			$('#a1mm-empty').show().find('p').text((r&&r.data&&r.data.message)||'Failed to load.');
			$('#a1mm-status').text('');
			return;
		}
		if (!r.data.items.length) {
			$('#a1mm-empty').show();
			$('#a1mm-status').text('0 items');
			return;
		}
		var d=r.data, f=(d.current_page-1)*perPage+1, t=Math.min(d.current_page*perPage,d.total);
		$('#a1mm-status').text('Showing '+f+'-'+t+' of '+d.total+' items');
		$('#a1mm-bulk-bar').show();
		$.each(d.items, function(i,item) { $('#a1mm-list').append(buildItem(item)); });
		buildPag(d.current_page, d.pages);
	}).fail(function() {
		$('#a1mm-loading').hide();
		$('#a1mm-empty').show().find('p').text('Network error.');
	});
}

// ---- Build Item Card ----
function buildItem(it) {
	var noExt = it.filename.replace(/\.[^.]+$/,'');
	var ext = it.filename.split('.').pop();
	var tc = 'a1mm-thumb' + (it.is_image ? ' a1mm-clickable' : '');
	var th = it.is_image
		? '<img src="'+escA(it.thumbnail_url)+'" alt="" />'
		: '<span class="dashicons dashicons-media-default"></span>';

	// SEO badge
	var seoClass = it.seo_score >= 4 ? 'a1mm-badge-seo-good' : (it.seo_score >= 2 ? 'a1mm-badge-seo-warn' : 'a1mm-badge-seo-bad');
	var badges = '<span class="a1mm-badge '+seoClass+'">SEO '+it.seo_score+'/4</span>';
	if (it.is_random_name) badges += '<span class="a1mm-badge a1mm-badge-random">Needs rename</span>';
	if (it.is_image && !it.alt_text) badges += '<span class="a1mm-badge a1mm-badge-no-alt">No alt text</span>';
	if (it.file_size > 512000) badges += '<span class="a1mm-badge a1mm-badge-large">'+esc(it.file_size_fmt)+'</span>';
	if (it.usage_count > 0) badges += '<span class="a1mm-badge a1mm-badge-used">Used in '+it.usage_count+' post'+(it.usage_count>1?'s':'')+'</span>';
	else badges += '<span class="a1mm-badge a1mm-badge-unused">Unused</span>';

	// Meta line
	var mp = [esc(it.mime_type), esc(it.file_size_fmt)];
	if (it.width && it.height) mp.push(it.width+'&times;'+it.height);
	mp.push(esc(it.date));

	var h = '<div class="a1mm-item" data-id="'+it.id+'" data-url="'+escA(it.url)+'" data-is-image="'+(it.is_image?'1':'0')+'" data-old-name="">'
		+ '<input type="checkbox" class="a1mm-item-cb" value="'+it.id+'" />'
		+ '<div class="'+tc+'">'+th+'</div>'
		+ '<div class="a1mm-info">'
		+ '<div class="a1mm-top-row"><div class="a1mm-current"><code>'+esc(it.filename)+'</code></div></div>'
		+ '<div class="a1mm-meta">'+mp.join(' &nbsp;|&nbsp; ')+'</div>'
		+ '<div class="a1mm-badges">'+badges+'</div>'
		+ '<div class="a1mm-field-row">'
		+   '<span class="a1mm-field-label">File Name:</span>'
		+   '<div class="a1mm-field-input-wrap"><input type="text" class="a1mm-meta-input a1mm-new-name" value="'+escA(noExt)+'" /><span class="a1mm-ext">.'+esc(ext)+'</span></div>'
		+ '</div>'
		+ '<div class="a1mm-field-row">'
		+   '<span class="a1mm-field-label">Alt Text:</span>'
		+   '<div class="a1mm-field-input-wrap"><input type="text" class="a1mm-meta-input a1mm-alt-input" value="'+escA(it.alt_text)+'" placeholder="Describe this image for SEO..." /></div>'
		+ '</div>'
		+ '<div class="a1mm-field-row">'
		+   '<span class="a1mm-field-label">Title:</span>'
		+   '<div class="a1mm-field-input-wrap"><input type="text" class="a1mm-meta-input a1mm-title-input" value="'+escA(it.title)+'" /></div>'
		+ '</div>'
		+ '<div class="a1mm-field-row">'
		+   '<span class="a1mm-field-label">Caption:</span>'
		+   '<div class="a1mm-field-input-wrap"><input type="text" class="a1mm-meta-input a1mm-caption-input" value="'+escA(it.caption)+'" placeholder="Short caption..." /></div>'
		+ '</div>'
		+ '<div class="a1mm-field-row">'
		+   '<span class="a1mm-field-label">Description:</span>'
		+   '<div class="a1mm-field-input-wrap"><textarea class="a1mm-meta-input a1mm-desc-input" rows="2" placeholder="Longer description...">'+esc(it.description)+'</textarea></div>'
		+ '</div>'
		+ '<div class="a1mm-field-row">'
		+   '<span class="a1mm-field-label"></span>'
		+   '<div class="a1mm-field-input-wrap a1mm-actions-row">'
		+     '<label class="a1mm-refs-label"><input type="checkbox" class="a1mm-refs-cb" checked /> Update refs</label>'
		+     '<button type="button" class="button button-primary a1mm-save-meta-btn">Save</button>'
		+     '<input type="file" class="a1mm-replace-file" accept="image/*,video/*,audio/*,application/pdf" style="display:none" />'
		+     '<button type="button" class="button a1mm-replace-btn">Replace</button>'
		+     '<button type="button" class="button a1mm-delete-btn">Delete</button>'
		+     '<span class="a1mm-item-msg"></span>'
		+   '</div>'
		+ '</div>';

	h += '</div></div>';
	return h;
}

// ---- Pagination ----
function buildPag(cur, tot) {
	if (tot <= 1) return;
	var p = $('#a1mm-pagination');
	if (cur > 1) p.append('<button type="button" class="button a1mm-page-btn" data-page="'+(cur-1)+'">&lsaquo; Prev</button>');
	p.append('<span class="a1mm-page-info">Page '+cur+' of '+tot+'</span>');
	if (cur < tot) p.append('<button type="button" class="button a1mm-page-btn" data-page="'+(cur+1)+'">Next &rsaquo;</button>');
}

// ---- Selection ----
function updateBulk() {
	var c = Object.keys(selected).length;
	$('#a1mm-selected-count').text(c + ' selected');
}

$(document).on('change', '.a1mm-item-cb', function() {
	var id = $(this).val();
	if ($(this).is(':checked')) selected[id] = true;
	else delete selected[id];
	updateBulk();
});

$('#a1mm-select-all').on('change', function() {
	var checked = $(this).is(':checked');
	$('.a1mm-item-cb').each(function() {
		$(this).prop('checked', checked);
		var id = $(this).val();
		if (checked) selected[id] = true;
		else delete selected[id];
	});
	updateBulk();
});

// ---- Save (rename if changed + meta) ----
$(document).on('click', '.a1mm-save-meta-btn', function() {
	var $it = $(this).closest('.a1mm-item');
	var id = $it.data('id');
	var $b = $(this);
	var $m = $it.find('.a1mm-item-msg');
	var newName = $it.find('.a1mm-new-name').val().trim();
	var curFile = $it.find('.a1mm-current code').text();
	var curName = curFile.replace(/\.[^.]+$/,'');
	var ur = $it.find('.a1mm-refs-cb').is(':checked') ? 1 : 0;
	$b.prop('disabled',true).text('Saving...');
	$m.text('').attr('class','a1mm-item-msg');
	$it.find('.a1mm-undo-link').remove();

	function saveMeta(msg) {
		$.post(a1mm.ajax, {
			action:'a1tools_update_media_meta', nonce:a1mm.nonceMeta,
			attachment_id: id,
			alt_text:    $it.find('.a1mm-alt-input').val(),
			title:       $it.find('.a1mm-title-input').val(),
			caption:     $it.find('.a1mm-caption-input').val(),
			description: $it.find('.a1mm-desc-input').val()
		}, function(r) {
			$b.prop('disabled',false).text('Save');
			if (r.success) {
				var txt = msg || 'Saved!';
				$m.text(txt).attr('class','a1mm-item-msg success');
				if ($it.find('.a1mm-alt-input').val()) $it.find('.a1mm-badge-no-alt').remove();
			} else {
				$m.text(r.data.message||'Meta save failed.').attr('class','a1mm-item-msg error');
			}
		}).fail(function() {
			$b.prop('disabled',false).text('Save');
			$m.text('Network error.').attr('class','a1mm-item-msg error');
		});
	}

	// Check if filename changed — rename first, then save meta.
	if (newName && newName !== curName) {
		$.post(a1mm.ajax, {
			action:'a1tools_rename_media', nonce:a1mm.nonceRename,
			attachment_id:id, new_filename:newName, update_refs:ur
		}, function(r) {
			if (r.success) {
				var d = r.data;
				$it.data('old-name', d.old_filename);
				$it.find('.a1mm-current code').text(d.new_filename);
				$it.find('.a1mm-new-name').val(d.new_filename.replace(/\.[^.]+$/,''));
				if (d.new_thumbnail_url) $it.find('.a1mm-thumb img').attr('src', d.new_thumbnail_url);
				$it.data('url', d.new_url);
				$it.addClass('a1mm-renamed');
				$it.find('.a1mm-badge-random').remove();
				var mt = 'Renamed & saved!';
				if (ur && d.refs_updated > 0) mt = 'Renamed (' + d.refs_updated + ' refs) & saved!';
				saveMeta(mt);
				// Show undo after msg
				setTimeout(function(){
					$m.after('<span class="a1mm-undo-link">Undo rename</span>');
				}, 100);
			} else {
				$b.prop('disabled',false).text('Save');
				$m.text(r.data.message||'Rename failed.').attr('class','a1mm-item-msg error');
			}
		}).fail(function() {
			$b.prop('disabled',false).text('Save');
			$m.text('Network error.').attr('class','a1mm-item-msg error');
		});
	} else {
		saveMeta();
	}
});

// ---- Undo Rename ----
$(document).on('click', '.a1mm-undo-link', function() {
	var $it = $(this).closest('.a1mm-item');
	var oldName = $it.data('old-name');
	if (!oldName) return;
	var noExt = oldName.replace(/\.[^.]+$/,'');
	var id = $it.data('id');
	var ur = $it.find('.a1mm-refs-cb').is(':checked') ? 1 : 0;
	var $m = $it.find('.a1mm-item-msg');
	$(this).remove();
	$m.text('Undoing...').attr('class','a1mm-item-msg');
	$.post(a1mm.ajax, {
		action:'a1tools_rename_media', nonce:a1mm.nonceRename,
		attachment_id:id, new_filename:noExt, update_refs:ur
	}, function(r) {
		if (r.success) {
			$it.find('.a1mm-current code').text(r.data.new_filename);
			$it.find('.a1mm-new-name').val(r.data.new_filename.replace(/\.[^.]+$/,''));
			if (r.data.new_thumbnail_url) $it.find('.a1mm-thumb img').attr('src', r.data.new_thumbnail_url);
			$it.data('url', r.data.new_url);
			$it.data('old-name','');
			$it.removeClass('a1mm-renamed');
			$m.text('Rename undone.').attr('class','a1mm-item-msg success');
		} else {
			$m.text(r.data.message||'Undo failed.').attr('class','a1mm-item-msg error');
		}
	});
});

// ---- Delete ----
$(document).on('click', '.a1mm-delete-btn', function() {
	var $it = $(this).closest('.a1mm-item');
	var id = $it.data('id');
	var fn = $it.find('.a1mm-current code').text();
	if (!confirm('Permanently delete "' + fn + '"? This cannot be undone.')) return;
	var $b = $(this);
	$b.prop('disabled',true).text('Deleting...');

	$.post(a1mm.ajax, {
		action:'a1tools_delete_media', nonce:a1mm.nonceDelete,
		attachment_id: id
	}, function(r) {
		if (r.success) {
			$it.slideUp(300, function() { $(this).remove(); });
		} else {
			$b.prop('disabled',false).text('Delete');
			alert(r.data.message||'Delete failed.');
		}
	}).fail(function() {
		$b.prop('disabled',false).text('Delete');
		alert('Network error.');
	});
});

// ---- Replace File ----
$(document).on('click', '.a1mm-replace-btn', function() {
	$(this).closest('.a1mm-item').find('.a1mm-replace-file').click();
});
$(document).on('change', '.a1mm-replace-file', function() {
	var file = this.files[0];
	if (!file) return;
	var $it = $(this).closest('.a1mm-item');
	var id = $it.data('id');
	var fn = $it.find('.a1mm-current code').text();
	var $btn = $it.find('.a1mm-replace-btn');
	var $msg = $it.find('.a1mm-item-msg');
	var ur = $it.find('.a1mm-refs-cb').is(':checked') ? 1 : 0;

	if (!confirm('Replace "' + fn + '" with "' + file.name + '"?\nThe old file will be permanently replaced.')) {
		this.value = ''; return;
	}

	$btn.prop('disabled',true).text('Uploading...');
	$msg.text('').attr('class','a1mm-item-msg');

	var fd = new FormData();
	fd.append('action', 'a1tools_replace_media');
	fd.append('nonce', a1mm.nonceReplace);
	fd.append('attachment_id', id);
	fd.append('file', file);
	fd.append('update_refs', ur);

	$.ajax({
		url: a1mm.ajax, type: 'POST', data: fd,
		processData: false, contentType: false,
		success: function(r) {
			if (r.success) {
				var d = r.data;
				if (d.thumbnail_url) $it.find('.a1mm-thumb img').attr('src', d.thumbnail_url + '?t=' + Date.now());
				$it.find('.a1mm-current code').text(d.filename);
				$it.find('.a1mm-new-name').val(d.filename.replace(/\.[^.]+$/,''));
				$it.find('.a1mm-ext').text('.' + d.filename.split('.').pop());
				$it.data('url', d.url);
				// Update meta line
				var mp = [esc(d.mime_type), esc(d.file_size_fmt)];
				if (d.width && d.height) mp.push(d.width+'&times;'+d.height);
				$it.find('.a1mm-meta').html(mp.join(' &nbsp;|&nbsp; '));
				// Update size badges
				$it.find('.a1mm-badge-large').remove();
				if (d.file_size > 512000) {
					$it.find('.a1mm-badges').append('<span class="a1mm-badge a1mm-badge-large">'+esc(d.file_size_fmt)+'</span>');
				}
				$msg.text('File replaced!').attr('class','a1mm-item-msg success');
			} else {
				$msg.text(r.data.message||'Replace failed.').attr('class','a1mm-item-msg error');
			}
			$btn.prop('disabled',false).text('Replace');
		},
		error: function() {
			$btn.prop('disabled',false).text('Replace');
			$msg.text('Upload error.').attr('class','a1mm-item-msg error');
		}
	});
	this.value = '';
});

// ---- Bulk Rename ----
$('#a1mm-bulk-rename-btn').on('click', function() {
	var ids = Object.keys(selected);
	var pat = $('#a1mm-bulk-pattern').val().trim();
	if (!ids.length) { alert('Select items first.'); return; }
	if (!pat) { alert('Enter a pattern. Use {n} for auto-number.'); return; }
	if (!confirm('Rename '+ids.length+' files using pattern "'+pat+'"?')) return;

	var $b = $(this);
	$b.prop('disabled',true).text('Renaming...');

	$.post(a1mm.ajax, {
		action:'a1tools_bulk_rename', nonce:a1mm.nonceBulkRename,
		ids:ids, pattern:pat, start_num:1, update_refs:1
	}, function(r) {
		$b.prop('disabled',false).text('Bulk Rename');
		if (r.success) {
			alert(r.data.message);
			loadMedia(currentPage);
		} else {
			alert(r.data.message||'Bulk rename failed.');
		}
	}).fail(function() {
		$b.prop('disabled',false).text('Bulk Rename');
		alert('Network error.');
	});
});

// ---- Bulk Alt Text ----
$('#a1mm-bulk-alt-btn').on('click', function() {
	var ids = Object.keys(selected);
	var pat = $('#a1mm-bulk-alt').val().trim();
	if (!ids.length) { alert('Select items first.'); return; }
	if (!pat) { alert('Enter alt text. Use {filename} to use each file\'s name.'); return; }
	if (!confirm('Set alt text for '+ids.length+' files?')) return;

	var $b = $(this);
	$b.prop('disabled',true).text('Setting...');

	$.post(a1mm.ajax, {
		action:'a1tools_bulk_update_alt', nonce:a1mm.nonceBulkAlt,
		ids:ids, alt_pattern:pat
	}, function(r) {
		$b.prop('disabled',false).text('Set Alt');
		if (r.success) {
			alert(r.data.message);
			loadMedia(currentPage);
		} else {
			alert(r.data.message||'Failed.');
		}
	}).fail(function() {
		$b.prop('disabled',false).text('Set Alt');
		alert('Network error.');
	});
});

// ---- Find Duplicates ----
$('#a1mm-duplicates-btn').on('click', function() {
	$('#a1mm-dup-overlay').show();
	$('#a1mm-dup-content').html('<p><span class="spinner is-active" style="float:none;"></span> Scanning for duplicates... This may take a moment.</p>');

	$.post(a1mm.ajax, {
		action:'a1tools_find_duplicates', nonce:a1mm.nonceDuplicates
	}, function(r) {
		if (!r.success || !r.data.groups.length) {
			$('#a1mm-dup-content').html('<p>' + esc(r.data ? r.data.message : 'No duplicates found.') + '</p>');
			return;
		}
		var html = '<p>Found <strong>'+r.data.count+'</strong> duplicate group'+(r.data.count>1?'s':'')+':</p>';
		$.each(r.data.groups, function(i,g) {
			html += '<div class="a1mm-dup-group"><h3>Group '+(i+1)+' &mdash; '+esc(g.files[0].size_fmt)+' each ('+g.files.length+' files)</h3>';
			$.each(g.files, function(j,f) {
				html += '<div class="a1mm-dup-file">';
				if (f.thumb) html += '<div class="a1mm-dup-thumb"><img src="'+escA(f.thumb)+'" /></div>';
				html += '<div><div class="a1mm-dup-name">'+esc(f.filename)+'</div><div class="a1mm-dup-id">ID: '+f.id+'</div></div>';
				html += '</div>';
			});
			html += '</div>';
		});
		$('#a1mm-dup-content').html(html);
	}).fail(function() {
		$('#a1mm-dup-content').html('<p>Error scanning for duplicates.</p>');
	});
});

$('.a1mm-modal-close, #a1mm-dup-overlay').on('click', function(e) {
	if (e.target === this) $('#a1mm-dup-overlay').hide();
});

// ---- Event Handlers ----
$(document).on('click', '.a1mm-page-btn', function() {
	loadMedia(parseInt($(this).data('page'),10));
	$('html,body').animate({scrollTop:0},200);
});
$('#a1mm-search-btn').on('click', function() { loadMedia(1); });
$('#a1mm-search').on('keypress', function(e) { if(e.which===13) loadMedia(1); });
$('#a1mm-mime-filter, #a1mm-sort').on('change', function() { loadMedia(1); });
$(document).on('keypress', '.a1mm-new-name', function(e) { if(e.which===13) $(this).closest('.a1mm-item').find('.a1mm-save-meta-btn').click(); });
$(document).on('keypress', '.a1mm-meta-input', function(e) {
	if(e.which===13 && !$(this).is('textarea')) $(this).closest('.a1mm-item').find('.a1mm-save-meta-btn').click();
});

// ---- Lightbox ----
$(document).on('click', '.a1mm-thumb.a1mm-clickable', function(e) {
	e.stopPropagation();
	var $it = $(this).closest('.a1mm-item');
	var url = $it.data('url');
	var fn = $it.find('.a1mm-current code').text();
	if (url) {
		$('#a1mm-lightbox-img').attr('src', url);
		$('#a1mm-lightbox-name').text(fn);
		$('#a1mm-lightbox').addClass('active');
	}
});
$('#a1mm-lightbox').on('click', function() {
	$(this).removeClass('active');
	$('#a1mm-lightbox-img').attr('src','');
});
$(document).on('keydown', function(e) {
	if (e.which===27) {
		if ($('#a1mm-lightbox').hasClass('active')) {
			$('#a1mm-lightbox').removeClass('active');
			$('#a1mm-lightbox-img').attr('src','');
		}
		$('#a1mm-dup-overlay').hide();
	}
});

// ---- SEO filter: unused needs pre-scan ----
$('#a1mm-seo-filter').on('change', function() {
	if ($(this).val() === 'unused') {
		$('#a1mm-status').text('Scanning for unused media...');
		$.post(a1mm.ajax, { action:'a1tools_scan_unused', nonce:a1mm.nonceUnused }, function() {
			loadMedia(1);
		});
		return;
	}
	loadMedia(1);
});

// Initial load
loadMedia(1);

})(jQuery);
JSEOF;
	}
}