<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * ACSIL_Admin_Page — 管理画面ページ登録・描画
 */
class ACSIL_Admin_Page {

	private ACSIL_Database $db;
	private ACSIL_Scanner $scanner;

	/** @var string[] このプラグインの管理画面フックサフィックス */
	private array $page_hooks = array();

	public function __construct( ACSIL_Database $db, ACSIL_Scanner $scanner ) {
		$this->db      = $db;
		$this->scanner = $scanner;
	}

	// ── メニュー登録 ──────────────────────────────────────────────────────

	public function register_menus(): void {
		$hooks = array();

		$hooks[] = add_menu_page(
			__( 'Internal Links', 'acs-internal-links' ),
			__( 'Internal Links', 'acs-internal-links' ),
			'edit_posts',
			'acsil-link-map',
			array( $this, 'render_link_map_page' ),
			'dashicons-admin-links',
			30
		);

		$hooks[] = add_submenu_page(
			'acsil-link-map',
			__( 'Link Map', 'acs-internal-links' ),
			__( 'Link Map', 'acs-internal-links' ),
			'edit_posts',
			'acsil-link-map',
			array( $this, 'render_link_map_page' )
		);

		$hooks[] = add_submenu_page(
			'acsil-link-map',
			__( 'Orphaned Posts', 'acs-internal-links' ),
			__( 'Orphaned Posts', 'acs-internal-links' ),
			'edit_posts',
			'acsil-orphan-posts',
			array( $this, 'render_orphan_page' )
		);

		$hooks[] = add_submenu_page(
			'acsil-link-map',
			__( 'Settings', 'acs-internal-links' ),
			__( 'Settings', 'acs-internal-links' ),
			'manage_options',
			'acsil-settings',
			array( $this, 'render_settings_page' )
		);

		// メニュータイトルは翻訳されるため、フックサフィックスは実測値を保持する
		$this->page_hooks = array_values( array_filter( $hooks, 'is_string' ) );
	}

	// ── スクリプト・スタイル読み込み ──────────────────────────────────────

	public function enqueue_scripts( string $hook ): void {
		// CSS：プラグインページ全体 + 投稿一覧/編集画面
		$is_plugin_page = in_array( $hook, $this->page_hooks, true );
		$is_post_screen = in_array( $hook, array( 'edit.php', 'post.php', 'post-new.php' ), true );

		if ( $is_plugin_page || $is_post_screen ) {
			wp_enqueue_style(
				'acsil-admin',
				ACSIL_URL . 'assets/css/admin.css',
				array(),
				ACSIL_VERSION
			);
		}

		if ( $is_plugin_page ) {
			$scan_nonce   = wp_create_nonce( 'acsil_scan_nonce' );
			$delete_nonce = wp_create_nonce( 'acsil_delete_nonce' );
			$settings     = ACSIL_Core::get_settings();

			wp_enqueue_script(
				'acsil-admin',
				ACSIL_URL . 'assets/js/admin.js',
				array(),
				ACSIL_VERSION,
				true
			);

			wp_localize_script(
				'acsil-admin',
				'acsilData',
				array(
					'restUrl'     => esc_url_raw( rest_url( 'acsil/v1/' ) ),
					'restNonce'   => wp_create_nonce( 'wp_rest' ),
					'ajaxUrl'     => admin_url( 'admin-ajax.php' ),
					'ajaxNonce'   => $scan_nonce,
					'deleteNonce' => $delete_nonce,
					'settings'    => array(
						'maxLabelLength'      => (int) $settings['max_label_length'],
						'defaultDisplayCount' => (int) $settings['default_limit'],
					),
					'i18n'        => array(
						'scanComplete'    => __( 'Scan complete', 'acs-internal-links' ),
						'scanError'       => __( 'An error occurred during the scan', 'acs-internal-links' ),
						'confirmDelete'   => __( 'Delete all link data? This action cannot be undone.', 'acs-internal-links' ),
						'noLinks'         => __( 'No internal links', 'acs-internal-links' ),
						'outgoing'        => __( 'Outbound', 'acs-internal-links' ),
						'incoming'        => __( 'Inbound', 'acs-internal-links' ),
						'orphanWarning'   => __( 'Orphaned Posts', 'acs-internal-links' ),
						'scanning'        => __( 'Scanning…', 'acs-internal-links' ),
						'articles'        => __( 'posts processed', 'acs-internal-links' ),
						'category'        => __( 'Category', 'acs-internal-links' ),
						'date'            => __( 'Date', 'acs-internal-links' ),
						/* translators: %d: number of posts shown on the link map */
						'mapManyNodes'    => __( '%d posts — labels are shown on hover. Using the filters is recommended.', 'acs-internal-links' ),
						'mapTooManyNodes' => __( '⚠ This site has more than 1,000 posts. Please use the category filter.', 'acs-internal-links' ),
						'mapLoadError'    => __( 'Failed to load the link map. Please reload the page.', 'acs-internal-links' ),
					),
				)
			);

			// リンクマップページのみ D3.js + link-map.js を読み込む
			if ( 'toplevel_page_acsil-link-map' === $hook ) {
				wp_enqueue_script(
					'acsil-d3',
					ACSIL_URL . 'assets/js/d3.v7.min.js',
					array(),
					'7.9.0',
					true
				);

				wp_enqueue_script(
					'acsil-link-map',
					ACSIL_URL . 'assets/js/link-map.js',
					array( 'acsil-d3', 'acsil-admin' ),
					ACSIL_VERSION,
					true
				);
			}
		}
	}

	// ── リンクマップページ ────────────────────────────────────────────────

	public function render_link_map_page(): void {
		if ( ! current_user_can( 'edit_posts' ) ) {
			wp_die( esc_html__( 'Sorry, you are not allowed to access this page.', 'acs-internal-links' ) );
		}

		$categories = get_categories( array( 'hide_empty' => false ) );
		$scan_nonce = wp_create_nonce( 'acsil_scan_nonce' );
		?>
		<div class="wrap acsil-wrap">
			<h1 class="wp-heading-inline"><?php esc_html_e( 'Internal Link Map', 'acs-internal-links' ); ?></h1>
			<button id="acsil-rescan-btn" class="page-title-action" data-nonce="<?php echo esc_attr( $scan_nonce ); ?>">
				<?php esc_html_e( 'Rescan', 'acs-internal-links' ); ?>
			</button>
			<hr class="wp-header-end">

			<!-- プログレスバー -->
			<div id="acsil-scan-progress" style="display:none;" class="acsil-progress-wrap">
				<div class="acsil-progress-bar-outer">
					<div class="acsil-progress-bar-inner" id="acsil-progress-inner" style="width:0%"></div>
				</div>
				<p id="acsil-progress-text" class="acsil-progress-text">
					<?php esc_html_e( 'Preparing…', 'acs-internal-links' ); ?>
				</p>
			</div>

			<!-- フィルター -->
			<div class="acsil-filter-bar">
				<label for="acsil-filter-category"><?php esc_html_e( 'Category:', 'acs-internal-links' ); ?></label>
				<select id="acsil-filter-category">
					<option value="0"><?php esc_html_e( 'All categories', 'acs-internal-links' ); ?></option>
					<?php foreach ( $categories as $cat ) : ?>
						<option value="<?php echo esc_attr( $cat->term_id ); ?>">
							<?php echo esc_html( $cat->name ); ?>
						</option>
					<?php endforeach; ?>
				</select>

				<label for="acsil-filter-status"><?php esc_html_e( 'Status:', 'acs-internal-links' ); ?></label>
				<select id="acsil-filter-status">
					<option value="any"><?php esc_html_e( 'All', 'acs-internal-links' ); ?></option>
					<option value="publish"><?php esc_html_e( 'Published only', 'acs-internal-links' ); ?></option>
					<option value="draft"><?php esc_html_e( 'Include drafts', 'acs-internal-links' ); ?></option>
				</select>

				<button id="acsil-filter-reset" class="button">
					<?php esc_html_e( 'Reset', 'acs-internal-links' ); ?>
				</button>
			</div>

			<!-- マップ描画エリア -->
			<div id="acsil-map-container" class="acsil-map-container">
				<div id="acsil-map-loading" class="acsil-loading">
					<span class="spinner is-active"></span>
					<?php esc_html_e( 'Loading data…', 'acs-internal-links' ); ?>
				</div>
				<svg id="acsil-map-svg"></svg>
				<div id="acsil-tooltip" class="acsil-tooltip" style="display:none;"></div>
			</div>

			<!-- 凡例 -->
			<div id="acsil-legend" class="acsil-legend">
				<span class="acsil-legend-orphan">
					<svg width="14" height="14" viewBox="0 0 14 14">
						<circle cx="7" cy="7" r="6" fill="none" stroke="#e74c3c" stroke-width="2" stroke-dasharray="3,2"/>
					</svg>
					<?php esc_html_e( 'Orphaned posts (no inbound links)', 'acs-internal-links' ); ?>
				</span>
				<span class="acsil-legend-note">
					<?php esc_html_e( 'Controls: click a node to open its editor / drag to reposition / scroll to zoom / double-click the background to reset the zoom', 'acs-internal-links' ); ?>
				</span>
			</div>

			<?php $this->render_footer(); ?>
		</div>
		<?php
	}

	// ── 孤立記事ページ ────────────────────────────────────────────────────

	public function render_orphan_page(): void {
		if ( ! current_user_can( 'edit_posts' ) ) {
			wp_die( esc_html__( 'Sorry, you are not allowed to access this page.', 'acs-internal-links' ) );
		}

		$settings   = ACSIL_Core::get_settings();
		$post_types = $settings['post_types'];

		$active_tab = isset( $_GET['tab'] ) ? sanitize_key( $_GET['tab'] ) : 'no_incoming'; // phpcs:ignore WordPress.Security.NonceVerification
		$page_num   = isset( $_GET['paged'] ) ? max( 1, absint( $_GET['paged'] ) ) : 1; // phpcs:ignore WordPress.Security.NonceVerification
		$per_page   = 20;

		$orphans_all = $this->db->get_orphan_posts( $active_tab, $post_types );
		$total       = count( $orphans_all );
		$offset      = ( $page_num - 1 ) * $per_page;
		$orphans     = array_slice( $orphans_all, $offset, $per_page );

		$counts = $this->db->get_all_link_counts();
		?>
		<div class="wrap acsil-wrap">
			<h1><?php esc_html_e( 'Orphaned Post List', 'acs-internal-links' ); ?></h1>

			<nav class="nav-tab-wrapper">
				<a href="<?php echo esc_url( admin_url( 'admin.php?page=acsil-orphan-posts&tab=no_incoming' ) ); ?>"
					class="nav-tab <?php echo 'no_incoming' === $active_tab ? 'nav-tab-active' : ''; ?>">
					<?php esc_html_e( 'No inbound links', 'acs-internal-links' ); ?>
				</a>
				<a href="<?php echo esc_url( admin_url( 'admin.php?page=acsil-orphan-posts&tab=no_outgoing' ) ); ?>"
					class="nav-tab <?php echo 'no_outgoing' === $active_tab ? 'nav-tab-active' : ''; ?>">
					<?php esc_html_e( 'No outbound links', 'acs-internal-links' ); ?>
				</a>
			</nav>

			<p class="acsil-count-label">
				<?php
				printf(
					/* translators: %d: number of posts */
					esc_html( _n( '%d post found.', '%d posts found.', $total, 'acs-internal-links' ) ),
					(int) $total
				);
				?>
			</p>

			<table class="wp-list-table widefat fixed striped">
				<thead>
					<tr>
						<th><?php esc_html_e( 'Title', 'acs-internal-links' ); ?></th>
						<th style="width:120px"><?php esc_html_e( 'Category', 'acs-internal-links' ); ?></th>
						<th style="width:100px"><?php esc_html_e( 'Date', 'acs-internal-links' ); ?></th>
						<th style="width:70px"><?php esc_html_e( 'Outbound', 'acs-internal-links' ); ?></th>
						<th style="width:70px"><?php esc_html_e( 'Inbound', 'acs-internal-links' ); ?></th>
						<th style="width:60px"><?php esc_html_e( 'Actions', 'acs-internal-links' ); ?></th>
					</tr>
				</thead>
				<tbody>
					<?php if ( empty( $orphans ) ) : ?>
						<tr>
							<td colspan="6">
								<?php esc_html_e( 'No orphaned posts found.', 'acs-internal-links' ); ?>
							</td>
						</tr>
					<?php else : ?>
						<?php
						foreach ( $orphans as $post ) :
							$post_id      = (int) $post['ID'];
							$cats         = get_the_category( $post_id );
							$cat_names    = $cats ? esc_html( implode( ', ', wp_list_pluck( $cats, 'name' ) ) ) : '—';
							$outgoing_cnt = $counts[ $post_id ]['outgoing'] ?? 0;
							$incoming_cnt = $counts[ $post_id ]['incoming'] ?? 0;
							?>
							<tr>
								<td>
									<a href="<?php echo esc_url( (string) get_edit_post_link( $post_id ) ); ?>">
										<?php echo esc_html( $post['post_title'] ?: __( '(no title)', 'acs-internal-links' ) ); ?>
									</a>
									<?php if ( 'draft' === $post['post_status'] ) : ?>
										<span class="acsil-badge-draft"><?php esc_html_e( 'Draft', 'acs-internal-links' ); ?></span>
									<?php endif; ?>
								</td>
								<td><?php echo $cat_names; // phpcs:ignore WordPress.Security.EscapeOutput ?></td>
								<td><?php echo esc_html( mysql2date( 'Y/m/d', $post['post_date'] ) ); ?></td>
								<td class="acsil-count-cell <?php echo 0 === $outgoing_cnt ? 'acsil-count-zero-gray' : ''; ?>">
									<?php echo esc_html( $outgoing_cnt ); ?>
								</td>
								<td class="acsil-count-cell <?php echo 0 === $incoming_cnt ? 'acsil-count-zero-red' : ''; ?>">
									<?php echo esc_html( $incoming_cnt ); ?>
								</td>
								<td>
									<a href="<?php echo esc_url( (string) get_edit_post_link( $post_id ) ); ?>" class="button button-small">
										<?php esc_html_e( 'Edit', 'acs-internal-links' ); ?>
									</a>
								</td>
							</tr>
						<?php endforeach; ?>
					<?php endif; ?>
				</tbody>
			</table>

			<?php
			$total_pages = ceil( $total / $per_page );
			if ( $total_pages > 1 ) :
				$base_url = admin_url( 'admin.php?page=acsil-orphan-posts&tab=' . esc_attr( $active_tab ) . '&paged=%#%' );
				echo wp_kses_post(
					paginate_links(
						array(
							'base'      => $base_url,
							'format'    => '',
							'current'   => $page_num,
							'total'     => $total_pages,
							'prev_text' => '&laquo;',
							'next_text' => '&raquo;',
						)
					)
				);
			endif;
			?>

			<?php $this->render_footer(); ?>
		</div>
		<?php
	}

	// ── 設定ページ ────────────────────────────────────────────────────────

	// ── レビュー依頼（この設定画面だけ・1回限り） ──────────────────────────

	/** レビュー依頼を閉じたことを保存する option 名。 */
	private const REVIEW_DISMISSED_OPTION = 'acsil_review_notice_dismissed';

	/** レビュー依頼の表示開始基準時刻を保存する option 名。 */
	private const REVIEW_SINCE_OPTION = 'acsil_review_notice_since';

	/** 表示開始までの待機日数。 */
	private const REVIEW_DELAY_DAYS = 7;

	/**
	 * 「閉じる」リンクを処理する。一度閉じたら二度と表示しない。
	 */
	public function maybe_dismiss_review_notice(): void {
		if ( ! isset( $_GET['acsil_dismiss_review'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- 直後に check_admin_referer で検証する。
			return;
		}
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}

		check_admin_referer( 'acsil_dismiss_review' );

		update_option( self::REVIEW_DISMISSED_OPTION, 1, false );

		wp_safe_redirect( admin_url( 'admin.php?page=acsil-settings' ) );
		exit;
	}

	/**
	 * WordPress.org のレビュー依頼を1行だけ描画する。
	 *
	 * 表示条件は「この設定画面」「manage_options」「まだ閉じていない」
	 * 「初回表示から7日以上経過」の4つ。外部への送信は一切行わない。
	 */
	private function render_review_request(): void {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}
		if ( get_option( self::REVIEW_DISMISSED_OPTION ) ) {
			return;
		}

		$since = (int) get_option( self::REVIEW_SINCE_OPTION, 0 );
		if ( ! $since ) {
			$since = time();
			update_option( self::REVIEW_SINCE_OPTION, $since, false );
		}
		if ( ( time() - $since ) < self::REVIEW_DELAY_DAYS * DAY_IN_SECONDS ) {
			return;
		}

		$review_url  = 'https://wordpress.org/support/plugin/acs-internal-links/reviews/#new-post';
		$dismiss_url = wp_nonce_url(
			add_query_arg(
				array(
					'page'                 => 'acsil-settings',
					'acsil_dismiss_review' => '1',
				),
				admin_url( 'admin.php' )
			),
			'acsil_dismiss_review'
		);
		?>
		<div class="notice notice-info" style="margin:16px 0;">
			<p>
				<?php esc_html_e( 'If this plugin is useful to you, a review on WordPress.org would help a lot.', 'acs-internal-links' ); ?>
				<a href="<?php echo esc_url( $review_url ); ?>" target="_blank" rel="noopener"><?php esc_html_e( 'Write a review', 'acs-internal-links' ); ?></a>
				<a href="<?php echo esc_url( $dismiss_url ); ?>" style="margin-left:12px;"><?php esc_html_e( 'Dismiss', 'acs-internal-links' ); ?></a>
			</p>
		</div>
		<?php
	}

	public function render_settings_page(): void {
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html__( 'Sorry, you are not allowed to access this page.', 'acs-internal-links' ) );
		}

		// 保存処理
		if ( isset( $_POST['acsil_settings_nonce'] ) && wp_verify_nonce( sanitize_text_field( wp_unslash( $_POST['acsil_settings_nonce'] ) ), 'acsil_save_settings' ) ) {
			$this->save_settings();
		}

		$settings   = ACSIL_Core::get_settings();
		$post_types = get_post_types( array( 'public' => true ), 'objects' );
		unset( $post_types['attachment'] );
		?>
		<div class="wrap acsil-wrap">
			<h1><?php esc_html_e( 'Settings', 'acs-internal-links' ); ?></h1>

			<?php $this->render_review_request(); ?>

			<form method="post" action="">
				<?php wp_nonce_field( 'acsil_save_settings', 'acsil_settings_nonce' ); ?>

				<!-- スキャン対象 -->
				<div class="acsil-card">
					<h2><?php esc_html_e( 'Scan Targets', 'acs-internal-links' ); ?></h2>
					<table class="form-table">
						<tr>
							<th><?php esc_html_e( 'Post types', 'acs-internal-links' ); ?></th>
							<td>
								<?php foreach ( $post_types as $pt ) : ?>
									<label style="display:block; margin-bottom:4px;">
										<input type="checkbox"
												name="post_types[]"
												value="<?php echo esc_attr( $pt->name ); ?>"
												<?php checked( in_array( $pt->name, $settings['post_types'], true ) ); ?>>
										<?php echo esc_html( $pt->label ); ?>
										<code style="font-size:11px;color:#888;">(<?php echo esc_html( $pt->name ); ?>)</code>
									</label>
								<?php endforeach; ?>
							</td>
						</tr>
					</table>
				</div>

				<!-- 表示設定 -->
				<div class="acsil-card">
					<h2><?php esc_html_e( 'Display Settings', 'acs-internal-links' ); ?></h2>
					<table class="form-table">
						<tr>
							<th><?php esc_html_e( 'Post list columns', 'acs-internal-links' ); ?></th>
							<td>
								<label>
									<input type="checkbox" name="show_list_columns" value="1"
											<?php checked( $settings['show_list_columns'] ); ?>>
									<?php esc_html_e( 'Show outbound and inbound link count columns in the post list', 'acs-internal-links' ); ?>
								</label>
							</td>
						</tr>
						<tr>
							<th><?php esc_html_e( 'Dashboard widget', 'acs-internal-links' ); ?></th>
							<td>
								<label>
									<input type="checkbox" name="show_dashboard" value="1"
											<?php checked( $settings['show_dashboard'] ); ?>>
									<?php esc_html_e( 'Show the Internal Link Report widget on the dashboard', 'acs-internal-links' ); ?>
								</label>
							</td>
						</tr>
						<tr>
							<th><?php esc_html_e( 'Editor sidebar', 'acs-internal-links' ); ?></th>
							<td>
								<label>
									<input type="checkbox" name="show_meta_box" value="1"
											<?php checked( $settings['show_meta_box'] ); ?>>
									<?php esc_html_e( 'Show link information in the sidebar of the post editor', 'acs-internal-links' ); ?>
								</label>
							</td>
						</tr>
					</table>
				</div>

				<!-- リンクマップ設定 -->
				<div class="acsil-card">
					<h2><?php esc_html_e( 'Link Map Settings', 'acs-internal-links' ); ?></h2>
					<table class="form-table">
						<tr>
							<th><?php esc_html_e( 'Default number of posts shown', 'acs-internal-links' ); ?></th>
							<td>
								<select name="default_limit">
									<?php foreach ( array( 50, 100, 200, 0 ) as $val ) : ?>
										<option value="<?php echo esc_attr( $val ); ?>"
											<?php selected( $settings['default_limit'], $val ); ?>>
											<?php echo 0 === $val ? esc_html__( 'All', 'acs-internal-links' ) : esc_html( $val ); ?>
										</option>
									<?php endforeach; ?>
								</select>
							</td>
						</tr>
						<tr>
							<th><?php esc_html_e( 'Maximum node label length', 'acs-internal-links' ); ?></th>
							<td>
								<input type="number"
										name="max_label_length"
										value="<?php echo esc_attr( $settings['max_label_length'] ); ?>"
										min="10" max="30" step="1" class="small-text">
								<?php esc_html_e( 'characters (10-30)', 'acs-internal-links' ); ?>
							</td>
						</tr>
					</table>
				</div>

				<!-- データ管理 -->
				<div class="acsil-card">
					<h2><?php esc_html_e( 'Data Management', 'acs-internal-links' ); ?></h2>
					<table class="form-table">
						<tr>
							<th><?php esc_html_e( 'On plugin deletion', 'acs-internal-links' ); ?></th>
							<td>
								<label>
									<input type="checkbox" name="delete_on_uninstall" value="1"
											<?php checked( $settings['delete_on_uninstall'] ); ?>>
									<?php esc_html_e( 'Delete all link data and settings when the plugin is deleted', 'acs-internal-links' ); ?>
								</label>
							</td>
						</tr>
					</table>

					<p>
						<button type="button" id="acsil-rescan-settings"
								data-nonce="<?php echo esc_attr( wp_create_nonce( 'acsil_scan_nonce' ) ); ?>"
								class="button button-secondary">
							<?php esc_html_e( 'Rescan now', 'acs-internal-links' ); ?>
						</button>
						&nbsp;
						<button type="button" id="acsil-delete-data"
								data-nonce="<?php echo esc_attr( wp_create_nonce( 'acsil_delete_nonce' ) ); ?>"
								class="button button-secondary acsil-btn-danger">
							<?php esc_html_e( 'Delete all link data', 'acs-internal-links' ); ?>
						</button>
					</p>

					<!-- 設定ページのプログレスバー -->
					<div id="acsil-scan-progress" style="display:none;" class="acsil-progress-wrap">
						<div class="acsil-progress-bar-outer">
							<div class="acsil-progress-bar-inner" id="acsil-progress-inner" style="width:0%"></div>
						</div>
						<p id="acsil-progress-text" class="acsil-progress-text"></p>
					</div>
					<div id="acsil-settings-message" class="acsil-message" style="display:none;"></div>
				</div>

				<?php submit_button( __( 'Save Settings', 'acs-internal-links' ) ); ?>
			</form>

			<?php $this->render_footer(); ?>
		</div>
		<?php
	}

	// ── 設定保存 ──────────────────────────────────────────────────────────

	private function save_settings(): void {
		$post_types = isset( $_POST['post_types'] ) // phpcs:ignore WordPress.Security.NonceVerification
			? array_map( 'sanitize_key', (array) $_POST['post_types'] ) // phpcs:ignore WordPress.Security.NonceVerification
			: array();

		$settings = array(
			'post_types'          => $post_types,
			'show_list_columns'   => ! empty( $_POST['show_list_columns'] ), // phpcs:ignore WordPress.Security.NonceVerification
			'show_dashboard'      => ! empty( $_POST['show_dashboard'] ),    // phpcs:ignore WordPress.Security.NonceVerification
			'show_meta_box'       => ! empty( $_POST['show_meta_box'] ),     // phpcs:ignore WordPress.Security.NonceVerification
			'default_limit'       => isset( $_POST['default_limit'] ) ? absint( $_POST['default_limit'] ) : 100, // phpcs:ignore WordPress.Security.NonceVerification
			'max_label_length'    => isset( $_POST['max_label_length'] ) ? min( 30, max( 10, absint( $_POST['max_label_length'] ) ) ) : 20, // phpcs:ignore WordPress.Security.NonceVerification
			'delete_on_uninstall' => ! empty( $_POST['delete_on_uninstall'] ), // phpcs:ignore WordPress.Security.NonceVerification
		);

		update_option( 'acsil_settings', $settings );
		delete_transient( 'acsil_dashboard_data' );

		add_settings_error(
			'acsil_settings',
			'settings_saved',
			__( 'Settings saved.', 'acs-internal-links' ),
			'success'
		);

		settings_errors( 'acsil_settings' );
	}

	// ── フッター ──────────────────────────────────────────────────────────

	public function render_footer(): void {
		?>
		<p class="acsil-footer">
			ACS Internal Links by
			<a href="https://acs-developer.com/" target="_blank" rel="noopener noreferrer">ACS Developer</a>
			&nbsp;|&nbsp;
			<a href="https://acs-developer.com/acs-internal-links/" target="_blank" rel="noopener noreferrer">
				<?php esc_html_e( 'Plugin page', 'acs-internal-links' ); ?>
			</a>
		</p>
		<?php
	}
}