<?php
/**
 * Super Ajax Search — Admin Settings.
 *
 * @package SuperAjaxSearch
 * @since   2.0.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Class Super_Ajax_Search_Admin
 */
class Super_Ajax_Search_Admin {

	/**
	 * Constructor.
	 */
	public function __construct() {
		add_action( 'admin_menu', array( $this, 'add_admin_menu' ) );
		add_action( 'admin_init', array( $this, 'register_settings' ) );
	}

	/**
	 * Add the settings menu page.
	 *
	 * @return void
	 */
	public function add_admin_menu(): void {
		add_menu_page(
			__( 'Super Ajax Search Settings', 'super-ajax-search' ),
			__( 'Super Ajax Search', 'super-ajax-search' ),
			'manage_options',
			'super-ajax-search',
			array( $this, 'render_settings_page' ),
			'dashicons-search',
			100
		);
	}

	/**
	 * Register all settings, sections, and fields.
	 *
	 * @return void
	 */
	public function register_settings(): void {
		// --- General Settings ---
		register_setting( 'super_ajax_search_settings', 'super_ajax_search_post_types', array(
			'type'              => 'array',
			'sanitize_callback' => array( $this, 'sanitize_post_types' ),
			'default'           => array( 'post' ),
		) );

		register_setting( 'super_ajax_search_settings', 'super_ajax_search_placeholder', array(
			'type'              => 'string',
			'sanitize_callback' => 'sanitize_text_field',
			'default'           => __( 'Search here…', 'super-ajax-search' ),
		) );

		register_setting( 'super_ajax_search_settings', 'super_ajax_search_limit', array(
			'type'              => 'integer',
			'sanitize_callback' => 'absint',
			'default'           => 5,
		) );

		register_setting( 'super_ajax_search_settings', 'super_ajax_search_no_results_text', array(
			'type'              => 'string',
			'sanitize_callback' => 'sanitize_text_field',
			'default'           => __( 'No results found', 'super-ajax-search' ),
		) );

		// --- Display Settings ---
		register_setting( 'super_ajax_search_settings', 'super_ajax_search_show_thumbnail', array(
			'type'              => 'string',
			'sanitize_callback' => 'sanitize_text_field',
			'default'           => '1',
		) );

		register_setting( 'super_ajax_search_settings', 'super_ajax_search_show_excerpt', array(
			'type'              => 'string',
			'sanitize_callback' => 'sanitize_text_field',
			'default'           => '1',
		) );

		register_setting( 'super_ajax_search_settings', 'super_ajax_search_group_by', array(
			'type'              => 'string',
			'sanitize_callback' => 'sanitize_key',
			'default'           => 'none',
		) );

		register_setting( 'super_ajax_search_settings', 'super_ajax_search_enable_category_filter', array(
			'type'              => 'string',
			'sanitize_callback' => 'sanitize_text_field',
			'default'           => '0',
		) );

		// --- Performance Settings ---
		register_setting( 'super_ajax_search_settings', 'super_ajax_search_cache_duration', array(
			'type'              => 'integer',
			'sanitize_callback' => 'absint',
			'default'           => 3600,
		) );

		// === Sections ===
		add_settings_section( 'sas_general', __( 'General', 'super-ajax-search' ), null, 'super_ajax_search_settings' );
		add_settings_section( 'sas_display', __( 'Display', 'super-ajax-search' ), null, 'super_ajax_search_settings' );
		add_settings_section( 'sas_performance', __( 'Performance', 'super-ajax-search' ), null, 'super_ajax_search_settings' );

		// === Fields ===
		add_settings_field( 'sas_post_types', __( 'Post Types to Search', 'super-ajax-search' ), array( $this, 'render_post_types' ), 'super_ajax_search_settings', 'sas_general' );
		add_settings_field( 'sas_placeholder', __( 'Search Placeholder', 'super-ajax-search' ), array( $this, 'render_placeholder' ), 'super_ajax_search_settings', 'sas_general' );
		add_settings_field( 'sas_limit', __( 'Max Results', 'super-ajax-search' ), array( $this, 'render_limit' ), 'super_ajax_search_settings', 'sas_general' );
		add_settings_field( 'sas_no_results', __( 'No Results Message', 'super-ajax-search' ), array( $this, 'render_no_results' ), 'super_ajax_search_settings', 'sas_general' );

		add_settings_field( 'sas_thumbnail', __( 'Show Thumbnails', 'super-ajax-search' ), array( $this, 'render_thumbnail' ), 'super_ajax_search_settings', 'sas_display' );
		add_settings_field( 'sas_excerpt', __( 'Show Smart Excerpts', 'super-ajax-search' ), array( $this, 'render_excerpt' ), 'super_ajax_search_settings', 'sas_display' );
		add_settings_field( 'sas_group_by', __( 'Group Results By', 'super-ajax-search' ), array( $this, 'render_group_by' ), 'super_ajax_search_settings', 'sas_display' );
		add_settings_field( 'sas_cat_filter', __( 'Category Filter Dropdown', 'super-ajax-search' ), array( $this, 'render_cat_filter' ), 'super_ajax_search_settings', 'sas_display' );

		add_settings_field( 'sas_cache', __( 'Cache Duration (seconds)', 'super-ajax-search' ), array( $this, 'render_cache' ), 'super_ajax_search_settings', 'sas_performance' );
	}

	/**
	 * Sanitize post types array.
	 *
	 * @param mixed $input Raw input.
	 * @return array
	 */
	public function sanitize_post_types( mixed $input ): array {
		return is_array( $input ) ? array_map( 'sanitize_text_field', $input ) : array();
	}

	// ──────────── Field Renderers ────────────

	/**
	 * Render post types checkboxes.
	 *
	 * @return void
	 */
	public function render_post_types(): void {
		$selected = get_option( 'super_ajax_search_post_types', array( 'post' ) );
		$types    = get_post_types( array( 'public' => true ), 'objects' );

		echo '<fieldset>';
		foreach ( $types as $type ) {
			$checked = in_array( $type->name, (array) $selected, true ) ? 'checked' : '';
			printf(
				'<label><input type="checkbox" name="super_ajax_search_post_types[]" value="%s" %s /> %s</label><br>',
				esc_attr( $type->name ),
				esc_attr( $checked ),
				esc_html( $type->label )
			);
		}
		echo '</fieldset>';
	}

	/**
	 * Render placeholder input.
	 *
	 * @return void
	 */
	public function render_placeholder(): void {
		printf(
			'<input type="text" name="super_ajax_search_placeholder" value="%s" class="regular-text" />',
			esc_attr( get_option( 'super_ajax_search_placeholder', __( 'Search here…', 'super-ajax-search' ) ) )
		);
	}

	/**
	 * Render limit input.
	 *
	 * @return void
	 */
	public function render_limit(): void {
		printf(
			'<input type="number" name="super_ajax_search_limit" value="%d" min="1" max="50" />',
			absint( get_option( 'super_ajax_search_limit', 5 ) )
		);
	}

	/**
	 * Render no results text input.
	 *
	 * @return void
	 */
	public function render_no_results(): void {
		printf(
			'<input type="text" name="super_ajax_search_no_results_text" value="%s" class="regular-text" />',
			esc_attr( get_option( 'super_ajax_search_no_results_text', __( 'No results found', 'super-ajax-search' ) ) )
		);
	}

	/**
	 * Render show thumbnail checkbox.
	 *
	 * @return void
	 */
	public function render_thumbnail(): void {
		$val = get_option( 'super_ajax_search_show_thumbnail', '1' );
		printf(
			'<label><input type="checkbox" name="super_ajax_search_show_thumbnail" value="1" %s /> %s</label>',
			checked( $val, '1', false ),
			esc_html__( 'Display featured images in search results', 'super-ajax-search' )
		);
	}

	/**
	 * Render show excerpt checkbox.
	 *
	 * @return void
	 */
	public function render_excerpt(): void {
		$val = get_option( 'super_ajax_search_show_excerpt', '1' );
		printf(
			'<label><input type="checkbox" name="super_ajax_search_show_excerpt" value="1" %s /> %s</label>',
			checked( $val, '1', false ),
			esc_html__( 'Show smart excerpt with keyword highlighting', 'super-ajax-search' )
		);
	}

	/**
	 * Render group-by select.
	 *
	 * @return void
	 */
	public function render_group_by(): void {
		$val = get_option( 'super_ajax_search_group_by', 'none' );
		$options = array(
			'none'      => __( 'No Grouping', 'super-ajax-search' ),
			'post_type' => __( 'Post Type', 'super-ajax-search' ),
			'category'  => __( 'Category', 'super-ajax-search' ),
		);

		echo '<select name="super_ajax_search_group_by">';
		foreach ( $options as $key => $label ) {
			printf(
				'<option value="%s" %s>%s</option>',
				esc_attr( $key ),
				selected( $val, $key, false ),
				esc_html( $label )
			);
		}
		echo '</select>';
	}

	/**
	 * Render category filter checkbox.
	 *
	 * @return void
	 */
	public function render_cat_filter(): void {
		$val = get_option( 'super_ajax_search_enable_category_filter', '0' );
		printf(
			'<label><input type="checkbox" name="super_ajax_search_enable_category_filter" value="1" %s /> %s</label>',
			checked( $val, '1', false ),
			esc_html__( 'Show category dropdown next to the search bar', 'super-ajax-search' )
		);
	}

	/**
	 * Render cache duration input.
	 *
	 * @return void
	 */
	public function render_cache(): void {
		printf(
			'<input type="number" name="super_ajax_search_cache_duration" value="%d" min="0" step="60" /> <p class="description">%s</p>',
			absint( get_option( 'super_ajax_search_cache_duration', 3600 ) ),
			esc_html__( 'Set to 0 to disable caching. Default: 3600 (1 hour).', 'super-ajax-search' )
		);
	}

	/**
	 * Render settings page.
	 *
	 * @return void
	 */
	public function render_settings_page(): void {
		if ( ! current_user_can( 'manage_options' ) ) {
			return;
		}
		?>
		<div class="wrap">
			<h1><?php esc_html_e( 'Super Ajax Search Settings', 'super-ajax-search' ); ?></h1>
			<p><?php esc_html_e( 'Use the shortcode [super_ajax_search] to add the search form to any page.', 'super-ajax-search' ); ?></p>
			<form action="options.php" method="post">
				<?php
				settings_fields( 'super_ajax_search_settings' );
				do_settings_sections( 'super_ajax_search_settings' );
				submit_button();
				?>
			</form>
			
			<hr style="margin-top: 30px;">
			<div class="sas-support-info">
				<h2><?php esc_html_e( 'Need Help or Have Suggestions?', 'super-ajax-search' ); ?></h2>
				<p><?php esc_html_e( 'If you have any suggestions, need any help, or want to connect with me, please reach out:', 'super-ajax-search' ); ?></p>
				<ul>
					<li><?php esc_html_e( 'Email:', 'super-ajax-search' ); ?> <a href="mailto:info@techwithnavi.com">info@techwithnavi.com</a></li>
					<li><?php esc_html_e( 'Website:', 'super-ajax-search' ); ?> <a href="https://techwithnavi.com/" target="_blank">https://techwithnavi.com/</a></li>
				</ul>
			</div>
		</div>
		<?php
	}
}