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

class BridgeHub_Admin {

	public function __construct() {
		add_action( 'admin_menu', array( $this, 'register_custom_menu' ), 1 );
		add_action( 'admin_menu', array( $this, 'remove_default_cpt_menu' ), 99 );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_admin_assets' ) );
		add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_frontend_assets' ) );
		add_action( 'admin_init', array( $this, 'maybe_run_migration' ) );
		add_action( 'admin_init', array( $this, 'handle_delete_slider' ) );
		add_action( 'admin_init', array( $this, 'handle_duplicate_slider' ) );
		add_action( 'wp_ajax_bridgehub_save_testimonial', array( $this, 'ajax_save_testimonial' ) );
		add_action( 'wp_ajax_bridgehub_delete_testimonial', array( $this, 'ajax_delete_testimonial' ) );
		add_action( 'wp_ajax_bridgehub_duplicate_testimonial', array( $this, 'ajax_duplicate_testimonial' ) );
		add_action( 'wp_ajax_bridgehub_reorder_testimonials', array( $this, 'ajax_reorder_testimonials' ) );
		add_action( 'wp_ajax_bridgehub_get_testimonial_data', array( $this, 'ajax_get_testimonial_data' ) );
		add_filter( 'admin_body_class', array( $this, 'add_admin_body_class' ) );
	}

	public function maybe_run_migration() {
		BridgeHub_Activator::run_migration_if_needed();
	}

	public function register_custom_menu() {
		add_menu_page(
			__( 'BridgeHub Testimonial Sliders', 'aj-square-testimonial-slider' ),
			__( 'BridgeHub Testimonial Sliders', 'aj-square-testimonial-slider' ),
			'manage_options',
			'bridgehub-sliders',
			array( $this, 'render_all_sliders_page' ),
			'dashicons-slides',
			30
		);

		add_submenu_page(
			'bridgehub-sliders',
			__( 'All Sliders', 'aj-square-testimonial-slider' ),
			__( 'All Sliders', 'aj-square-testimonial-slider' ),
			'manage_options',
			'bridgehub-sliders',
			array( $this, 'render_all_sliders_page' )
		);

		add_submenu_page(
			'bridgehub-sliders',
			__( 'Add New Slider', 'aj-square-testimonial-slider' ),
			__( 'Add New Slider', 'aj-square-testimonial-slider' ),
			'manage_options',
			'bridgehub-add-slider',
			array( $this, 'handle_add_new_slider' )
		);

		add_submenu_page(
			'bridgehub-sliders',
			__( 'Documentation', 'aj-square-testimonial-slider' ),
			__( 'Documentation', 'aj-square-testimonial-slider' ),
			'manage_options',
			'bridgehub-documentation',
			array( $this, 'render_documentation_page' )
		);
	}

	public function remove_default_cpt_menu() {
		remove_menu_page( 'edit.php?post_type=bridgehub_slider' );
	}

	public function handle_add_new_slider() {
		wp_safe_redirect( admin_url( 'post-new.php?post_type=bridgehub_slider' ) );
		exit;
	}

	public function handle_delete_slider() {
		if ( ! isset( $_GET['bridgehub_delete_slider'] ) || ! isset( $_GET['_wpnonce'] ) ) {
			return;
		}

		$slider_id = absint( $_GET['bridgehub_delete_slider'] );

		if ( ! wp_verify_nonce( sanitize_text_field( wp_unslash( $_GET['_wpnonce'] ) ), 'bridgehub_delete_slider_' . $slider_id ) ) {
			wp_die( esc_html__( 'Security check failed.', 'aj-square-testimonial-slider' ) );
		}

		if ( ! current_user_can( 'delete_post', $slider_id ) ) {
			wp_die( esc_html__( 'You do not have sufficient permissions to delete this slider.', 'aj-square-testimonial-slider' ) );
		}

		// Delete child testimonials first.
		$testimonial_ids = get_post_meta( $slider_id, 'bridgehub_testimonial_ids', true );
		if ( is_array( $testimonial_ids ) ) {
			foreach ( $testimonial_ids as $tid ) {
				wp_delete_post( absint( $tid ), true );
			}
		}

		wp_delete_post( $slider_id, true );
		wp_safe_redirect( admin_url( 'admin.php?page=bridgehub-sliders&deleted=1' ) );
		exit;
	}

	public function handle_duplicate_slider() {
		if ( ! isset( $_GET['bridgehub_duplicate_slider'] ) || ! isset( $_GET['_wpnonce'] ) ) {
			return;
		}

		$slider_id = absint( $_GET['bridgehub_duplicate_slider'] );

		if ( ! wp_verify_nonce( sanitize_text_field( wp_unslash( $_GET['_wpnonce'] ) ), 'bridgehub_duplicate_slider_' . $slider_id ) ) {
			wp_die( esc_html__( 'Security check failed.', 'aj-square-testimonial-slider' ) );
		}

		if ( ! current_user_can( 'edit_post', $slider_id ) ) {
			wp_die( esc_html__( 'You do not have sufficient permissions to duplicate this slider.', 'aj-square-testimonial-slider' ) );
		}

		$original = get_post( $slider_id );
		if ( ! $original || 'bridgehub_slider' !== $original->post_type ) {
			wp_safe_redirect( admin_url( 'admin.php?page=bridgehub-sliders' ) );
			exit;
		}

		$new_title = $original->post_title . ' — ' . __( 'Copy', 'aj-square-testimonial-slider' );

		$new_id = wp_insert_post(
			array(
				'post_title'   => $new_title,
				'post_content' => $original->post_content,
				'post_type'    => 'bridgehub_slider',
				'post_status'  => 'draft',
			)
		);

		if ( $new_id && ! is_wp_error( $new_id ) ) {
			// Copy slider settings meta (skip testimonial order — rebuilt below).
			$skip_keys = array(
				'_wp_attachment_metadata',
				'_wp_old_slug',
				'_wp_old_id',
				'bridgehub_testimonial_ids',
			);
			$meta = get_post_meta( $slider_id );
			if ( is_array( $meta ) ) {
				foreach ( $meta as $key => $values ) {
					if ( in_array( $key, $skip_keys, true ) ) {
						continue;
					}
					foreach ( $values as $value ) {
						add_post_meta( $new_id, $key, $value );
					}
				}
			}

			// Duplicate child testimonials.
			$old_ids = get_post_meta( $slider_id, 'bridgehub_testimonial_ids', true );
			$new_testimonial_ids = array();
			if ( is_array( $old_ids ) ) {
				foreach ( $old_ids as $old_tid ) {
					$old_post = get_post( $old_tid );
					if ( ! $old_post || 'bhub_testimonial' !== $old_post->post_type ) {
						continue;
					}
					$new_tid = wp_insert_post(
						array(
							'post_title'    => $old_post->post_title,
							'post_content'  => $old_post->post_content,
							'post_type'     => 'bhub_testimonial',
							'post_status'   => $old_post->post_status,
							'post_author'   => get_current_user_id(),
						)
					);
					if ( $new_tid && ! is_wp_error( $new_tid ) ) {
						$testimonial_meta_keys = array(
							'bridgehub_testimonial_designation',
							'ajsqtesl_slider_subtitle',
							'bridgehub_testimonial_company',
							'bridgehub_testimonial_rating',
						);
						foreach ( $testimonial_meta_keys as $mk ) {
							$mv = get_post_meta( $old_tid, $mk, true );
							if ( '' !== $mv ) {
								update_post_meta( $new_tid, $mk, $mv );
							}
						}
						update_post_meta( $new_tid, 'bridgehub_testimonial_parent_slider', $new_id );

						$thumb_id = get_post_thumbnail_id( $old_tid );
						if ( $thumb_id ) {
							set_post_thumbnail( $new_tid, $thumb_id );
						}
						$new_testimonial_ids[] = $new_tid;
					}
				}
			}
			update_post_meta( $new_id, 'bridgehub_testimonial_ids', $new_testimonial_ids );

			if ( has_post_thumbnail( $slider_id ) ) {
				set_post_thumbnail( $new_id, get_post_thumbnail_id( $slider_id ) );
			}

			wp_safe_redirect( admin_url( 'post.php?post=' . $new_id . '&action=edit&duplicated=1' ) );
			exit;
		}

		wp_safe_redirect( admin_url( 'admin.php?page=bridgehub-sliders' ) );
		exit;
	}

	public function enqueue_admin_assets( $hook ) {
		$screen = get_current_screen();

		$is_slider_list = ( false !== strpos( $hook, 'bridgehub-sliders' ) && 'post' !== $hook && 'post-new' !== $hook );
		$is_slider_edit = ( $screen && 'bridgehub_slider' === $screen->post_type && in_array( $screen->base, array( 'post', 'post-new' ), true ) );
		$is_doc_page    = ( false !== strpos( $hook, 'bridgehub-documentation' ) );

		if ( ! $is_slider_list && ! $is_slider_edit && ! $is_doc_page ) {
			return;
		}

		$admin_css_path = BRIDGEHUB_PLUGIN_DIR . 'assets/css/bridgehub-admin.css';
		$admin_css_url  = BRIDGEHUB_PLUGIN_URL . 'assets/css/bridgehub-admin.css';
		wp_enqueue_style(
			'bridgehub-admin',
			$admin_css_url,
			array(),
			file_exists( $admin_css_path ) ? filemtime( $admin_css_path ) : BRIDGEHUB_VERSION
		);

		if ( $is_slider_edit ) {
			// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Reading the current post ID on the admin edit screen; no data is modified.
			$slider_id = isset( $_GET['post'] ) ? absint( $_GET['post'] ) : 0;

			wp_enqueue_media();

			$admin_js_path = BRIDGEHUB_PLUGIN_DIR . 'assets/js/bridgehub-admin.js';
			$admin_js_url  = BRIDGEHUB_PLUGIN_URL . 'assets/js/bridgehub-admin.js';
			wp_enqueue_script(
				'bridgehub-admin',
				$admin_js_url,
				array( 'jquery', 'jquery-ui-sortable' ),
				file_exists( $admin_js_path ) ? filemtime( $admin_js_path ) : BRIDGEHUB_VERSION,
				true
			);

			wp_localize_script(
				'bridgehub-admin',
				'bridgehubAdmin',
				array(
					'ajaxUrl'       => admin_url( 'admin-ajax.php' ),
					'nonce'         => wp_create_nonce( 'bridgehub_testimonial_action' ),
					'sliderId'      => $slider_id,
					'copySuccess'   => __( 'Copied!', 'aj-square-testimonial-slider' ),
					'confirmDelete' => __( 'Are you sure you want to delete this slider? This cannot be undone.', 'aj-square-testimonial-slider' ),
					'confirmDeleteTestimonial' => __( 'Are you sure you want to delete this testimonial? This cannot be undone.', 'aj-square-testimonial-slider' ),
					'i18n'          => array(
						'addTestimonial'       => __( 'Add Testimonial', 'aj-square-testimonial-slider' ),
						'editTestimonial'      => __( 'Edit Testimonial', 'aj-square-testimonial-slider' ),
						'clientName'           => __( 'Client Name', 'aj-square-testimonial-slider' ),
						'testimonialContent'   => __( 'Testimonial Content', 'aj-square-testimonial-slider' ),
						'designation'          => __( 'Designation', 'aj-square-testimonial-slider' ),
						'company'              => __( 'Company', 'aj-square-testimonial-slider' ),
						'rating'               => __( 'Rating', 'aj-square-testimonial-slider' ),
						'featuredImage'        => __( 'Featured Image', 'aj-square-testimonial-slider' ),
						'chooseImage'          => __( 'Choose Image', 'aj-square-testimonial-slider' ),
						'removeImage'          => __( 'Remove Image', 'aj-square-testimonial-slider' ),
						'save'                 => __( 'Save Testimonial', 'aj-square-testimonial-slider' ),
						'cancel'               => __( 'Cancel', 'aj-square-testimonial-slider' ),
						'saving'               => __( 'Saving...', 'aj-square-testimonial-slider' ),
						'saved'                => __( 'Saved!', 'aj-square-testimonial-slider' ),
						'noTestimonials'       => __( 'No testimonials yet. Click "Add Testimonial" to create your first one.', 'aj-square-testimonial-slider' ),
						'confirmDeleteTestimonial' => __( 'Are you sure you want to delete this testimonial?', 'aj-square-testimonial-slider' ),
						'copyShortcode'        => __( 'Copy Shortcode', 'aj-square-testimonial-slider' ),
						'copied'               => __( 'Copied!', 'aj-square-testimonial-slider' ),
						'noRating'             => __( 'No Rating', 'aj-square-testimonial-slider' ),
					),
				)
			);
		}
	}

	public function enqueue_frontend_assets() {
		$has_slider = false;

		if ( is_singular() ) {
			global $post;
			if ( is_a( $post, 'WP_Post' ) ) {
				if ( has_shortcode( $post->post_content, 'bridgehub_testimonial_slider' ) || has_shortcode( $post->post_content, 'ajsqtesl_slider' ) ) {
					$has_slider = true;
				}
			}
		}

		if ( ! $has_slider && ! is_customize_preview() ) {
			return;
		}

		$style_path = BRIDGEHUB_PLUGIN_DIR . 'assets/css/ajsqtesl-style.css';
		$style_url  = BRIDGEHUB_PLUGIN_URL . 'assets/css/ajsqtesl-style.css';
		wp_enqueue_style(
			'ajsqtesl-style',
			$style_url,
			array(),
			file_exists( $style_path ) ? filemtime( $style_path ) : BRIDGEHUB_VERSION
		);

		$js_path = BRIDGEHUB_PLUGIN_DIR . 'assets/js/ajsqtesl-plugin.js';
		$js_url  = BRIDGEHUB_PLUGIN_URL . 'assets/js/ajsqtesl-plugin.js';
		wp_enqueue_script(
			'ajsqtesl-plugin',
			$js_url,
			array( 'jquery' ),
			file_exists( $js_path ) ? filemtime( $js_path ) : BRIDGEHUB_VERSION,
			true
		);
	}

	public function add_admin_body_class( $classes ) {
		$screen = get_current_screen();
		if ( $screen && 'bridgehub_slider' === $screen->post_type && in_array( $screen->base, array( 'post', 'post-new' ), true ) ) {
			$classes .= ' bridgehub-slider-edit ';
		}
		return $classes;
	}

	public function render_all_sliders_page() {
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html__( 'You do not have sufficient permissions to access this page.', 'aj-square-testimonial-slider' ) );
		}
		
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Reading query parameters only to display admin notices.
		$deleted   = isset( $_GET['deleted'] );
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Reading query parameters only to display admin notices.
		$duplicated = isset( $_GET['duplicated'] );

		$sliders = get_posts(
			array(
				'post_type'      => 'bridgehub_slider',
				'posts_per_page' => -1,
				'post_status'    => 'any',
				'orderby'        => 'modified',
				'order'          => 'DESC',
			)
		);
		?>
		<div class="bh-wrap">
			<div class="bh-header">
				<a class="bh-brand" href="<?php echo esc_url( admin_url( 'admin.php?page=bridgehub-sliders' ) ); ?>">
					<span class="bh-brand-logo">
						<svg viewBox="0 0 24 24"><path d="M12 2L2 7l10 5 10-5-10-5z"/><path d="M2 17l10 5 10-5"/><path d="M2 12l10 5 10-5"/></svg>
					</span>
					<span class="bh-brand-text">
						<span class="bh-brand-name">BridgeHub</span>
						<span class="bh-brand-sub">Testimonial Slider</span>
					</span>
					<span class="bh-version-pill">v<?php echo esc_html( BRIDGEHUB_VERSION ); ?></span>
				</a>
				<div class="bh-header-actions">
					<a href="<?php echo esc_url( admin_url( 'admin.php?page=bridgehub-documentation' ) ); ?>" class="bh-iconlink">
						<svg viewBox="0 0 24 24"><path d="M2 3h6a4 4 0 0 1 4 4v14a3 3 0 0 0-3-3H2z"/><path d="M22 3h-6a4 4 0 0 0-4 4v14a3 3 0 0 1 3-3h7z"/></svg>
						<?php esc_html_e( 'Docs', 'aj-square-testimonial-slider' ); ?>
					</a>
				</div>
			</div>

			<div class="bh-body">
				<div class="bh-dashboard">
					<?php if ( $deleted ) : ?>
						<div class="bh-notice">
							<?php esc_html_e( 'Slider deleted successfully.', 'aj-square-testimonial-slider' ); ?>
						</div>
					<?php endif; ?>
					<?php if ( $duplicated ) : ?>
						<div class="bh-notice">
							<?php esc_html_e( 'Slider duplicated successfully.', 'aj-square-testimonial-slider' ); ?>
						</div>
					<?php endif; ?>

					<div class="bh-section-head">
						<div>
							<h1><?php esc_html_e( 'All Sliders', 'aj-square-testimonial-slider' ); ?></h1>
							<p><?php esc_html_e( 'Manage your testimonial sliders. Each slider is a complete testimonial slide.', 'aj-square-testimonial-slider' ); ?></p>
						</div>
						<a href="<?php echo esc_url( admin_url( 'post-new.php?post_type=bridgehub_slider' ) ); ?>" class="bh-btn bh-btn-primary">
							<svg viewBox="0 0 24 24" width="16" height="16"><line x1="12" y1="5" x2="12" y2="19"/><line x1="5" y1="12" x2="19" y2="12"/></svg>
							<?php esc_html_e( 'Add New Slider', 'aj-square-testimonial-slider' ); ?>
						</a>
					</div>

					<?php if ( empty( $sliders ) ) : ?>
						<div class="bh-empty">
							<div class="bh-empty-icon">
								<svg viewBox="0 0 24 24"><rect x="2" y="7" width="20" height="14" rx="2" ry="2"/><polyline points="17 2 12 7 7 2"/></svg>
							</div>
							<h2><?php esc_html_e( 'No sliders yet', 'aj-square-testimonial-slider' ); ?></h2>
							<p><?php esc_html_e( 'Create your first testimonial slider to get started.', 'aj-square-testimonial-slider' ); ?></p>
							<a href="<?php echo esc_url( admin_url( 'post-new.php?post_type=bridgehub_slider' ) ); ?>" class="bh-btn bh-btn-primary bh-btn-lg">
								<svg viewBox="0 0 24 24" width="16" height="16"><line x1="12" y1="5" x2="12" y2="19"/><line x1="5" y1="12" x2="19" y2="12"/></svg>
								<?php esc_html_e( 'Create Your First Slider', 'aj-square-testimonial-slider' ); ?>
							</a>
						</div>
					<?php else : ?>
						<div class="bh-table-wrap">
							<table class="bh-table">
								<thead>
									<tr>
										<th class="bh-th-title"><?php esc_html_e( 'Title', 'aj-square-testimonial-slider' ); ?></th>
										<th class="bh-th-shortcode"><?php esc_html_e( 'Shortcode', 'aj-square-testimonial-slider' ); ?></th>
										<th class="bh-th-status"><?php esc_html_e( 'Status', 'aj-square-testimonial-slider' ); ?></th>
										<th class="bh-th-date"><?php esc_html_e( 'Date', 'aj-square-testimonial-slider' ); ?></th>
										<th class="bh-th-actions"><?php esc_html_e( 'Actions', 'aj-square-testimonial-slider' ); ?></th>
									</tr>
								</thead>
								<tbody>
									<?php foreach ( $sliders as $slider ) :
										$shortcode   = sprintf( '[bridgehub_testimonial_slider id="%d"]', $slider->ID );
										$edit_url    = get_edit_post_link( $slider->ID, 'raw' );
										$delete_url  = wp_nonce_url(
											admin_url( 'admin.php?page=bridgehub-sliders&bridgehub_delete_slider=' . $slider->ID ),
											'bridgehub_delete_slider_' . $slider->ID
										);
										$duplicate_url = wp_nonce_url(
											admin_url( 'admin.php?page=bridgehub-sliders&bridgehub_duplicate_slider=' . $slider->ID ),
											'bridgehub_duplicate_slider_' . $slider->ID
										);
										$status       = get_post_status( $slider );
										$status_label = get_post_status_object( $status ) ? get_post_status_object( $status )->label : $status;
										$is_published = ( 'publish' === $status );
										?>
										<tr>
											<td class="bh-td-title">
												<strong><a href="<?php echo esc_url( $edit_url ); ?>"><?php echo esc_html( $slider->post_title ? $slider->post_title : __( '(Untitled)', 'aj-square-testimonial-slider' ) ); ?></a></strong>
											</td>
											<td class="bh-td-shortcode">
												<code class="bh-inline-code"><?php echo esc_html( $shortcode ); ?></code>
											</td>
											<td class="bh-td-status">
												<span class="bh-pill <?php echo esc_attr( $is_published ? 'bh-pill-published' : 'bh-pill-draft' ); ?>">
													<?php echo esc_html( $status_label ); ?>
												</span>
											</td>
											<td class="bh-td-date">
												<?php echo esc_html( get_the_date( 'M j, Y', $slider->ID ) ); ?>
											</td>
											<td class="bh-td-actions">
												<a href="<?php echo esc_url( $edit_url ); ?>" class="bh-btn bh-btn-sm bh-btn-primary">
													<?php esc_html_e( 'Edit', 'aj-square-testimonial-slider' ); ?>
												</a>
												<a href="<?php echo esc_url( $duplicate_url ); ?>" class="bh-btn bh-btn-sm">
													<?php esc_html_e( 'Duplicate', 'aj-square-testimonial-slider' ); ?>
												</a>
												<a href="<?php echo esc_url( $delete_url ); ?>" class="bh-btn bh-btn-sm bh-btn-danger" data-confirm-delete>
													<?php esc_html_e( 'Delete', 'aj-square-testimonial-slider' ); ?>
												</a>
											</td>
										</tr>
									<?php endforeach; ?>
								</tbody>
							</table>
						</div>
					<?php endif; ?>
				</div>
			</div>
		</div>
		<?php
	}

	/**
	 * AJAX: Save (create or update) a testimonial slide.
	 */
	public function ajax_save_testimonial() {
		check_ajax_referer( 'bridgehub_testimonial_action', 'nonce' );

		if ( ! current_user_can( 'edit_posts' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'aj-square-testimonial-slider' ) ) );
		}

		$slider_id       = absint( $_POST['slider_id'] ?? 0 );
		$testimonial_id  = absint( $_POST['testimonial_id'] ?? 0 );
		$client_name     = sanitize_text_field( wp_unslash( $_POST['client_name'] ?? '' ) );
		$content         = wp_kses_post( wp_unslash( $_POST['content'] ?? '' ) );
		$designation     = sanitize_text_field( wp_unslash( $_POST['designation'] ?? '' ) );
		$company         = sanitize_text_field( wp_unslash( $_POST['company'] ?? '' ) );
		$rating          = absint( $_POST['rating'] ?? 0 );
		$image_id        = absint( $_POST['image_id'] ?? 0 );

		if ( ! $slider_id ) {
			wp_send_json_error( array( 'message' => __( 'Invalid slider ID.', 'aj-square-testimonial-slider' ) ) );
		}

		$slider_post = get_post( $slider_id );
		if ( ! $slider_post || 'bridgehub_slider' !== $slider_post->post_type ) {
			wp_send_json_error( array( 'message' => __( 'Invalid slider.', 'aj-square-testimonial-slider' ) ) );
		}

		if ( '' === $client_name ) {
			wp_send_json_error( array( 'message' => __( 'Client name is required.', 'aj-square-testimonial-slider' ) ) );
		}

		$is_new = ( $testimonial_id <= 0 );

		if ( $is_new ) {
			$testimonial_id = wp_insert_post(
				array(
					'post_title'    => $client_name,
					'post_content'  => $content,
					'post_type'     => 'bhub_testimonial',
					'post_status'   => 'publish',
					'post_author'   => get_current_user_id(),
				)
			);

			if ( is_wp_error( $testimonial_id ) ) {
				wp_send_json_error( array( 'message' => $testimonial_id->get_error_message() ) );
			}

			// Add to slider's testimonial list.
			$ids = get_post_meta( $slider_id, 'bridgehub_testimonial_ids', true );
			if ( ! is_array( $ids ) ) {
				$ids = array();
			}
			$ids[] = $testimonial_id;
			update_post_meta( $slider_id, 'bridgehub_testimonial_ids', array_unique( $ids ) );
		} else {
			$existing = get_post( $testimonial_id );
			if ( ! $existing || 'bhub_testimonial' !== $existing->post_type ) {
				wp_send_json_error( array( 'message' => __( 'Invalid testimonial.', 'aj-square-testimonial-slider' ) ) );
			}

			wp_update_post(
				array(
					'ID'           => $testimonial_id,
					'post_title'   => $client_name,
					'post_content' => $content,
				)
			);
		}

		// Save meta.
		update_post_meta( $testimonial_id, 'bridgehub_testimonial_designation', $designation );
		update_post_meta( $testimonial_id, 'ajsqtesl_slider_subtitle', $designation );
		update_post_meta( $testimonial_id, 'bridgehub_testimonial_company', $company );
		update_post_meta( $testimonial_id, 'bridgehub_testimonial_parent_slider', $slider_id );

		if ( $rating >= 1 && $rating <= 5 ) {
			update_post_meta( $testimonial_id, 'bridgehub_testimonial_rating', $rating );
		} else {
			delete_post_meta( $testimonial_id, 'bridgehub_testimonial_rating' );
		}

		if ( $image_id > 0 ) {
			set_post_thumbnail( $testimonial_id, $image_id );
		} else {
			delete_post_thumbnail( $testimonial_id );
		}

		// Build the HTML for the updated item.
		$html = $this->get_testimonial_item_html( $testimonial_id, $slider_id );

		wp_send_json_success(
			array(
				'message'  => $is_new ? __( 'Testimonial added.', 'aj-square-testimonial-slider' ) : __( 'Testimonial updated.', 'aj-square-testimonial-slider' ),
				'id'       => $testimonial_id,
				'html'     => $html,
				'is_new'   => $is_new,
				'count'    => count( get_post_meta( $slider_id, 'bridgehub_testimonial_ids', true ) ),
			)
		);
	}

	/**
	 * AJAX: Delete a testimonial.
	 */
	public function ajax_delete_testimonial() {
		check_ajax_referer( 'bridgehub_testimonial_action', 'nonce' );

		if ( ! current_user_can( 'edit_posts' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'aj-square-testimonial-slider' ) ) );
		}

		$testimonial_id = absint( $_POST['testimonial_id'] ?? 0 );
		$slider_id      = absint( $_POST['slider_id'] ?? 0 );

		if ( ! $testimonial_id || ! $slider_id ) {
			wp_send_json_error( array( 'message' => __( 'Invalid parameters.', 'aj-square-testimonial-slider' ) ) );
		}

		// Remove from slider's testimonial list.
		$ids = get_post_meta( $slider_id, 'bridgehub_testimonial_ids', true );
		if ( is_array( $ids ) ) {
			$ids = array_diff( $ids, array( $testimonial_id ) );
			update_post_meta( $slider_id, 'bridgehub_testimonial_ids', array_values( $ids ) );
		}

		wp_delete_post( $testimonial_id, true );

		wp_send_json_success(
			array(
				'message' => __( 'Testimonial deleted.', 'aj-square-testimonial-slider' ),
				'count'   => count( $ids ?? array() ),
			)
		);
	}

	/**
	 * AJAX: Duplicate a testimonial.
	 */
	public function ajax_duplicate_testimonial() {
		check_ajax_referer( 'bridgehub_testimonial_action', 'nonce' );

		if ( ! current_user_can( 'edit_posts' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'aj-square-testimonial-slider' ) ) );
		}

		$testimonial_id = absint( $_POST['testimonial_id'] ?? 0 );
		$slider_id      = absint( $_POST['slider_id'] ?? 0 );

		if ( ! $testimonial_id || ! $slider_id ) {
			wp_send_json_error( array( 'message' => __( 'Invalid parameters.', 'aj-square-testimonial-slider' ) ) );
		}

		$original = get_post( $testimonial_id );
		if ( ! $original || 'bhub_testimonial' !== $original->post_type ) {
			wp_send_json_error( array( 'message' => __( 'Invalid testimonial.', 'aj-square-testimonial-slider' ) ) );
		}

		$new_id = wp_insert_post(
			array(
				'post_title'    => $original->post_title . ' — ' . __( 'Copy', 'aj-square-testimonial-slider' ),
				'post_content'  => $original->post_content,
				'post_type'     => 'bhub_testimonial',
				'post_status'   => 'publish',
				'post_author'   => get_current_user_id(),
			)
		);

		if ( is_wp_error( $new_id ) ) {
			wp_send_json_error( array( 'message' => $new_id->get_error_message() ) );
		}

		// Copy meta.
		$meta_keys = array(
			'bridgehub_testimonial_designation',
			'ajsqtesl_slider_subtitle',
			'bridgehub_testimonial_company',
			'bridgehub_testimonial_rating',
		);
		foreach ( $meta_keys as $key ) {
			$value = get_post_meta( $testimonial_id, $key, true );
			if ( '' !== $value ) {
				update_post_meta( $new_id, $key, $value );
			}
		}
		update_post_meta( $new_id, 'bridgehub_testimonial_parent_slider', $slider_id );

		// Copy featured image.
		$thumb_id = get_post_thumbnail_id( $testimonial_id );
		if ( $thumb_id ) {
			set_post_thumbnail( $new_id, $thumb_id );
		}

		// Add to slider's list (after the original).
		$ids = get_post_meta( $slider_id, 'bridgehub_testimonial_ids', true );
		if ( ! is_array( $ids ) ) {
			$ids = array();
		}
		$pos   = array_search( $testimonial_id, $ids );
		$pos   = false !== $pos ? $pos + 1 : count( $ids );
		array_splice( $ids, $pos, 0, array( $new_id ) );
		update_post_meta( $slider_id, 'bridgehub_testimonial_ids', $ids );

		$html = $this->get_testimonial_item_html( $new_id, $slider_id );

		wp_send_json_success(
			array(
				'message' => __( 'Testimonial duplicated.', 'aj-square-testimonial-slider' ),
				'id'      => $new_id,
				'html'    => $html,
				'count'   => count( $ids ),
			)
		);
	}

	/**
	 * AJAX: Reorder testimonials.
	 */
	public function ajax_reorder_testimonials() {
		check_ajax_referer( 'bridgehub_testimonial_action', 'nonce' );

		if ( ! current_user_can( 'edit_posts' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'aj-square-testimonial-slider' ) ) );
		}

		$slider_id = absint( $_POST['slider_id'] ?? 0 );
		$order     = isset( $_POST['order'] ) ? array_map( 'absint', (array) $_POST['order'] ) : array();

		if ( ! $slider_id || empty( $order ) ) {
			wp_send_json_error( array( 'message' => __( 'Invalid parameters.', 'aj-square-testimonial-slider' ) ) );
		}

		update_post_meta( $slider_id, 'bridgehub_testimonial_ids', array_unique( $order ) );

		wp_send_json_success( array( 'message' => __( 'Order updated.', 'aj-square-testimonial-slider' ) ) );
	}

	/**
	 * AJAX: Get full testimonial data for editing.
	 */
	public function ajax_get_testimonial_data() {
		check_ajax_referer( 'bridgehub_testimonial_action', 'nonce' );

		if ( ! current_user_can( 'edit_posts' ) ) {
			wp_send_json_error( array( 'message' => __( 'Permission denied.', 'aj-square-testimonial-slider' ) ) );
		}

		$testimonial_id = absint( $_POST['testimonial_id'] ?? 0 );
		if ( ! $testimonial_id ) {
			wp_send_json_error( array( 'message' => __( 'Invalid testimonial ID.', 'aj-square-testimonial-slider' ) ) );
		}

		$post = get_post( $testimonial_id );
		if ( ! $post || 'bhub_testimonial' !== $post->post_type ) {
			wp_send_json_error( array( 'message' => __( 'Invalid testimonial.', 'aj-square-testimonial-slider' ) ) );
		}

		$thumb_id = get_post_thumbnail_id( $testimonial_id );
		$thumb_url = $thumb_id ? wp_get_attachment_image_url( $thumb_id, 'medium' ) : '';

		wp_send_json_success(
			array(
				'title'      => $post->post_title,
				'content'    => $post->post_content,
				'designation' => get_post_meta( $testimonial_id, 'bridgehub_testimonial_designation', true ),
				'company'    => get_post_meta( $testimonial_id, 'bridgehub_testimonial_company', true ),
				'rating'     => absint( get_post_meta( $testimonial_id, 'bridgehub_testimonial_rating', true ) ),
				'image_id'   => $thumb_id,
				'image_url'  => $thumb_url,
			)
		);
	}

	/**
	 * Build the HTML for a single testimonial list item.
	 */
	private function get_testimonial_item_html( $testimonial_id, $slider_id ) {
		$testimonial  = get_post( $testimonial_id );
		if ( ! $testimonial ) {
			return '';
		}

		$thumb_id     = get_post_thumbnail_id( $testimonial_id );
		$thumb_url    = $thumb_id ? wp_get_attachment_image_url( $thumb_id, 'thumbnail' ) : '';
		$designation  = get_post_meta( $testimonial_id, 'bridgehub_testimonial_designation', true );
		if ( '' === $designation ) {
			$designation = get_post_meta( $testimonial_id, 'ajsqtesl_slider_subtitle', true );
		}
		$company  = get_post_meta( $testimonial_id, 'bridgehub_testimonial_company', true );
		$rating   = absint( get_post_meta( $testimonial_id, 'bridgehub_testimonial_rating', true ) );
		$excerpt  = wp_trim_words( $testimonial->post_content, 15 );

		ob_start();
		?>
		<div class="bh-tm-item bh-tm-item-new" data-id="<?php echo esc_attr( $testimonial_id ); ?>">
			<div class="bh-tm-drag-handle" title="<?php esc_attr_e( 'Drag to reorder', 'aj-square-testimonial-slider' ); ?>">
				<svg viewBox="0 0 24 24" width="16" height="16"><circle cx="9" cy="6" r="1.5"/><circle cx="15" cy="6" r="1.5"/><circle cx="9" cy="12" r="1.5"/><circle cx="15" cy="12" r="1.5"/><circle cx="9" cy="18" r="1.5"/><circle cx="15" cy="18" r="1.5"/></svg>
			</div>
			<div class="bh-tm-thumb">
				<?php if ( $thumb_url ) : ?>
					<img src="<?php echo esc_url( $thumb_url ); ?>" alt="<?php echo esc_attr( $testimonial->post_title ); ?>">
				<?php else : ?>
					<span class="bh-tm-no-img">
						<svg viewBox="0 0 24 24" width="20" height="20"><rect x="3" y="3" width="18" height="18" rx="2" ry="2"/><circle cx="8.5" cy="8.5" r="1.5"/><polyline points="21 15 16 10 5 21"/></svg>
					</span>
				<?php endif; ?>
			</div>
			<div class="bh-tm-info">
				<strong class="bh-tm-name"><?php echo esc_html( $testimonial->post_title ? $testimonial->post_title : __( '(Untitled)', 'aj-square-testimonial-slider' ) ); ?></strong>
				<span class="bh-tm-meta">
					<?php if ( $designation ) : ?>
						<?php echo esc_html( $designation ); ?>
						<?php if ( $company ) : ?>
							, <?php echo esc_html( $company ); ?>
						<?php endif; ?>
					<?php elseif ( $company ) : ?>
						<?php echo esc_html( $company ); ?>
					<?php endif; ?>
				</span>
				<?php if ( $excerpt ) : ?>
					<span class="bh-tm-excerpt"><?php echo esc_html( $excerpt ); ?></span>
				<?php endif; ?>
				<?php if ( $rating > 0 ) : ?>
					<span class="bh-tm-rating">
						<?php
						for ( $i = 1; $i <= 5; $i++ ) {
							echo $i <= $rating ? '<span class="bh-star-filled">&#9733;</span>' : '<span class="bh-star-empty">&#9734;</span>';
						}
						?>
					</span>
				<?php endif; ?>
			</div>
			<div class="bh-tm-actions">
				<button type="button" class="bh-tm-btn bh-tm-btn-edit" data-id="<?php echo esc_attr( $testimonial_id ); ?>" title="<?php esc_attr_e( 'Edit', 'aj-square-testimonial-slider' ); ?>">
					<svg viewBox="0 0 24 24" width="14" height="14"><path d="M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7"/><path d="M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z"/></svg>
				</button>
				<button type="button" class="bh-tm-btn bh-tm-btn-duplicate" data-id="<?php echo esc_attr( $testimonial_id ); ?>" title="<?php esc_attr_e( 'Duplicate', 'aj-square-testimonial-slider' ); ?>">
					<svg viewBox="0 0 24 24" width="14" height="14"><rect x="9" y="9" width="13" height="13" rx="2" ry="2"/><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/></svg>
				</button>
				<button type="button" class="bh-tm-btn bh-tm-btn-delete" data-id="<?php echo esc_attr( $testimonial_id ); ?>" title="<?php esc_attr_e( 'Delete', 'aj-square-testimonial-slider' ); ?>">
					<svg viewBox="0 0 24 24" width="14" height="14"><polyline points="3 6 5 6 21 6"/><path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2"/></svg>
				</button>
			</div>
		</div>
		<?php
		return ob_get_clean();
	}

	public function render_documentation_page() {
		if ( ! current_user_can( 'manage_options' ) ) {
			wp_die( esc_html__( 'You do not have sufficient permissions to access this page.', 'aj-square-testimonial-slider' ) );
		}
		?>
		<div class="bh-wrap">
			<div class="bh-header">
				<a class="bh-brand" href="<?php echo esc_url( admin_url( 'admin.php?page=bridgehub-sliders' ) ); ?>">
					<span class="bh-brand-logo">
						<svg viewBox="0 0 24 24"><path d="M12 2L2 7l10 5 10-5-10-5z"/><path d="M2 17l10 5 10-5"/><path d="M2 12l10 5 10-5"/></svg>
					</span>
					<span class="bh-brand-text">
						<span class="bh-brand-name">BridgeHub</span>
						<span class="bh-brand-sub">Testimonial Slider</span>
					</span>
					<span class="bh-version-pill">v<?php echo esc_html( BRIDGEHUB_VERSION ); ?></span>
				</a>
				<div class="bh-header-actions">
					<a href="<?php echo esc_url( admin_url( 'admin.php?page=bridgehub-sliders' ) ); ?>" class="bh-iconlink">
						<svg viewBox="0 0 24 24"><rect x="2" y="7" width="20" height="14" rx="2" ry="2"/><polyline points="17 2 12 7 7 2"/></svg>
						<?php esc_html_e( 'Sliders', 'aj-square-testimonial-slider' ); ?>
					</a>
				</div>
			</div>

			<div class="bh-body">
				<div class="bh-dashboard">
					<h1 style="margin-bottom:20px"><?php esc_html_e( 'Documentation', 'aj-square-testimonial-slider' ); ?></h1>

					<div class="bh-doc-grid">
						<div class="bh-doc-content">
							<div class="bh-doc-card">
								<h2><?php esc_html_e( 'Getting Started', 'aj-square-testimonial-slider' ); ?></h2>
								<ol>
									<li>
										<strong><?php esc_html_e( 'Create a Testimonial Slider', 'aj-square-testimonial-slider' ); ?></strong>
										<p><?php esc_html_e( 'Go to Testimonial Sliders and click "Add New Slider". Enter the client name as the title, write their testimonial in the content editor, set a featured image for their photo, and fill in the designation, company, and rating in the Client Details panel.', 'aj-square-testimonial-slider' ); ?></p>
									</li>
									<li>
										<strong><?php esc_html_e( 'Configure Display Settings', 'aj-square-testimonial-slider' ); ?></strong>
										<p><?php esc_html_e( 'Use the Slider Settings metabox below the editor to customize colors, image dimensions, navigation controls, transitions, and autoplay behavior.', 'aj-square-testimonial-slider' ); ?></p>
									</li>
									<li>
										<strong><?php esc_html_e( 'Publish and Copy Shortcode', 'aj-square-testimonial-slider' ); ?></strong>
										<p><?php esc_html_e( 'Click Publish. The shortcode will appear at the top of the editor. Copy it and paste into any post, page, or widget to display your testimonial slider.', 'aj-square-testimonial-slider' ); ?></p>
									</li>
								</ol>
							</div>

							<div class="bh-doc-card">
								<h2><?php esc_html_e( 'Shortcodes', 'aj-square-testimonial-slider' ); ?></h2>
								<p><code>[bridgehub_testimonial_slider id="123"]</code> &mdash; <?php esc_html_e( 'Displays a specific testimonial slider. Replace "123" with your slider\'s ID.', 'aj-square-testimonial-slider' ); ?></p>
								<p><code>[ajsqtesl_slider]</code> &mdash; <?php esc_html_e( 'Legacy shortcode. Displays all published sliders. Kept for backward compatibility.', 'aj-square-testimonial-slider' ); ?></p>
							</div>

							<div class="bh-doc-card">
								<h2><?php esc_html_e( 'Slider Customization', 'aj-square-testimonial-slider' ); ?></h2>
								<p><?php esc_html_e( 'Each slider has its own settings organized in tabs:', 'aj-square-testimonial-slider' ); ?></p>
								<ol>
									<li><strong><?php esc_html_e( 'General', 'aj-square-testimonial-slider' ); ?>:</strong> <?php esc_html_e( 'Background and text colors.', 'aj-square-testimonial-slider' ); ?></li>
									<li><strong><?php esc_html_e( 'Size', 'aj-square-testimonial-slider' ); ?>:</strong> <?php esc_html_e( 'Image height and border radius.', 'aj-square-testimonial-slider' ); ?></li>
									<li><strong><?php esc_html_e( 'Controls', 'aj-square-testimonial-slider' ); ?>:</strong> <?php esc_html_e( 'Navigation arrows and bullet indicators.', 'aj-square-testimonial-slider' ); ?></li>
									<li><strong><?php esc_html_e( 'Animations', 'aj-square-testimonial-slider' ); ?>:</strong> <?php esc_html_e( 'Transition speed.', 'aj-square-testimonial-slider' ); ?></li>
									<li><strong><?php esc_html_e( 'Autoplay', 'aj-square-testimonial-slider' ); ?>:</strong> <?php esc_html_e( 'Enable/disable auto-slide, interval, and pause on hover.', 'aj-square-testimonial-slider' ); ?></li>
								</ol>
							</div>
						</div>

						<div class="bh-doc-sidebar">
							<div class="bh-doc-card bh-doc-about">
								<h3><?php esc_html_e( 'About Author', 'aj-square-testimonial-slider' ); ?></h3>
								<p>
									<img class="bh-author-img" src="<?php echo esc_url( BRIDGEHUB_PLUGIN_URL . 'assets/img/author.png' ); ?>" alt="<?php esc_attr_e( 'Jahid Shah', 'aj-square-testimonial-slider' ); ?>" width="150" height="150">
								</p>
								<p>
									<?php
									printf(
										/* translators: %s: author link */
										esc_html__( 'I\'m %s, a front-end developer with specialized skills in WordPress theme development and WordPress Security Expert.', 'aj-square-testimonial-slider' ),
										'<a href="https://jahidshah.com/" target="_blank" rel="noopener noreferrer">Jahid Shah</a>'
									);
									?>
								</p>
								<p>
									<a href="https://www.buymeacoffee.com/jahidshah" target="_blank" rel="noopener noreferrer">
										<img src="<?php echo esc_url( BRIDGEHUB_PLUGIN_URL . 'assets/img/buyme.png' ); ?>" alt="<?php esc_attr_e( 'Buy Me a Coffee', 'aj-square-testimonial-slider' ); ?>">
									</a>
								</p>
							</div>
						</div>
					</div>
				</div>
			</div>
		</div>
		<?php
	}
}