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

/**
 * Turns the "Add & manage videos right here" Elementor repeater
 * (ADDOSHVI_Elementor_Widget's 'curate' mode) into real addoshvi_video CPT posts.
 *
 * Runs on save_post (which Elementor's own save flow triggers via its
 * internal wp_update_post() call, in addition to writing _elementor_data)
 * so no extra AJAX/JS wiring is needed — the admin edits the repeater in
 * the panel, hits Update/Publish, and this walks the saved element tree
 * looking for our widget in 'curate' mode, then upserts one addoshvi_video post
 * per repeater row (matched across saves via a stable per-item key so
 * re-saving updates the same post instead of duplicating it), and trashes
 * any previously-synced posts for that widget whose row was removed.
 */
class ADDOSHVI_Elementor_Sync {

	private static $instance = null;

	public static function instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
		}
		return self::$instance;
	}

	private function __construct() {
		add_action( 'save_post', array( $this, 'maybe_sync_from_meta' ), 20, 1 );
	}

	public function maybe_sync_from_meta( $post_id ) {
		if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
			return;
		}
		if ( wp_is_post_revision( $post_id ) ) {
			return;
		}
		// Guard against recursing into the addoshvi_video posts this very sync
		// creates/updates (they don't carry _elementor_data anyway, but
		// checking the post type directly is cheaper and unambiguous).
		if ( ADDOSHVI_POST_TYPE === get_post_type( $post_id ) ) {
			return;
		}
		if ( ! current_user_can( 'edit_post', $post_id ) ) {
			return;
		}
		if ( ! class_exists( 'ADDOSHVI_Frontend_Editor' ) || ! ADDOSHVI_Frontend_Editor::current_user_can_edit() ) {
			return;
		}

		$elementor_data = get_post_meta( $post_id, '_elementor_data', true );
		if ( ! $elementor_data ) {
			return;
		}
		$elements = is_array( $elementor_data ) ? $elementor_data : json_decode( $elementor_data, true );
		if ( ! is_array( $elements ) ) {
			return;
		}

		$this->sync_page( $post_id, $elements );
	}

	private function sync_page( $post_id, $elements ) {
		$seen_item_keys = array();
		$this->walk_elements( $elements, $post_id, $seen_item_keys );

		// Trash any videos previously synced from this page that no longer
		// have a matching repeater row (item removed, or widget deleted).
		$existing = get_posts( array(
			'post_type'      => ADDOSHVI_POST_TYPE,
			'post_status'    => array( 'publish', 'draft' ),
			'posts_per_page' => -1,
			// No core API looks up posts by a custom meta value; scoped to this plugin's own addoshvi_video CPT, which only ever holds the handful of videos synced from this one page.
			'meta_query'     => array( // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query
				array(
					'key'   => '_addoshvi_source_page_id',
					'value' => $post_id,
				),
			),
			'fields'         => 'ids',
		) );

		foreach ( $existing as $existing_id ) {
			$key = get_post_meta( $existing_id, '_addoshvi_source_item_key', true );
			if ( '' === $key || ! in_array( $key, $seen_item_keys, true ) ) {
				wp_trash_post( $existing_id );
			}
		}
	}

	private function walk_elements( $elements, $post_id, &$seen_item_keys ) {
		foreach ( (array) $elements as $element ) {
			if ( ! empty( $element['widgetType'] ) && 'addoshvi_shoppable_video' === $element['widgetType'] ) {
				$settings = isset( $element['settings'] ) && is_array( $element['settings'] ) ? $element['settings'] : array();

				// v1.4.2 removed the "Which videos?" dropdown entirely — the
				// widget is curate-only now, and its own render() defaults an
				// unset video_select_mode to 'curate' to match. This must use
				// the same default, or a widget dropped onto a page *after*
				// v1.4.2 (which never gets this key set at all, since the
				// control that used to set it no longer exists) would never
				// get synced here.
				$mode = ! empty( $settings['video_select_mode'] ) ? $settings['video_select_mode'] : 'curate';
				if ( 'curate' === $mode && ! empty( $settings['video_items'] ) ) {
					$widget_id = isset( $element['id'] ) ? $element['id'] : '';

					foreach ( (array) $settings['video_items'] as $item ) {
						if ( empty( $item['video']['id'] ) ) {
							continue; // No video chosen yet in this row — nothing to sync.
						}
						$item_id  = isset( $item['_id'] ) ? $item['_id'] : '';
						$item_key = $post_id . ':' . $widget_id . ':' . $item_id;

						$seen_item_keys[] = $item_key;
						$this->sync_item( $post_id, $widget_id, $item, $item_key );
					}
				}
			}

			if ( ! empty( $element['elements'] ) && is_array( $element['elements'] ) ) {
				$this->walk_elements( $element['elements'], $post_id, $seen_item_keys );
			}
		}
	}

	private function sync_item( $post_id, $widget_id, $item, $item_key ) {
		$video_attachment_id = absint( $item['video']['id'] );
		if ( ! $video_attachment_id || 0 !== strpos( (string) get_post_mime_type( $video_attachment_id ), 'video/' ) ) {
			return;
		}

		$cover_attachment_id = ! empty( $item['cover']['id'] ) ? absint( $item['cover']['id'] ) : 0;
		if ( $cover_attachment_id && 0 !== strpos( (string) get_post_mime_type( $cover_attachment_id ), 'image/' ) ) {
			$cover_attachment_id = 0;
		}

		$product_ids = array();
		if ( ! empty( $item['products'] ) ) {
			foreach ( (array) $item['products'] as $pid ) {
				$pid = absint( $pid );
				if ( $pid ) {
					$product_ids[] = $pid;
				}
			}
		}

		$title = ! empty( $item['item_title'] ) ? sanitize_text_field( $item['item_title'] ) : '';
		if ( '' === $title ) {
			$attachment_title = get_the_title( $video_attachment_id );
			$title            = $attachment_title ? $attachment_title : sprintf(
				/* translators: %s: current date/time */
				__( 'Video — %s', 'addonn-shoppable-video' ),
				current_time( 'Y-m-d H:i' )
			);
		}

		$existing = get_posts( array(
			'post_type'      => ADDOSHVI_POST_TYPE,
			'post_status'    => array( 'publish', 'draft', 'trash' ),
			'posts_per_page' => 1,
			// No core API looks up a post by a custom meta value; scoped to this plugin's own addoshvi_video CPT and capped at posts_per_page => 1.
			'meta_query'     => array( // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query
				array(
					'key'   => '_addoshvi_source_item_key',
					'value' => $item_key,
				),
			),
			'fields'         => 'ids',
		) );
		$existing_id = ! empty( $existing ) ? $existing[0] : 0;

		$postarr = array(
			'post_type'   => ADDOSHVI_POST_TYPE,
			'post_status' => 'publish',
			'post_title'  => $title,
		);

		if ( $existing_id ) {
			$postarr['ID'] = $existing_id;
			$new_id        = wp_update_post( $postarr, true );
		} else {
			$new_id = wp_insert_post( $postarr, true );
		}

		if ( is_wp_error( $new_id ) || ! $new_id ) {
			return;
		}

		update_post_meta( $new_id, '_addoshvi_video_attachment_id', $video_attachment_id );
		update_post_meta( $new_id, '_addoshvi_products', $product_ids );
		update_post_meta( $new_id, '_addoshvi_whatsapp_enabled', ! empty( $item['whatsapp_enabled'] ) && 'yes' === $item['whatsapp_enabled'] ? '1' : '' );
		update_post_meta( $new_id, '_addoshvi_whatsapp_number', ! empty( $item['whatsapp_number'] ) ? preg_replace( '/\D+/', '', $item['whatsapp_number'] ) : '' );
		update_post_meta( $new_id, '_addoshvi_source_page_id', $post_id );
		update_post_meta( $new_id, '_addoshvi_source_widget_id', $widget_id );
		update_post_meta( $new_id, '_addoshvi_source_item_key', $item_key );

		if ( $cover_attachment_id ) {
			set_post_thumbnail( $new_id, $cover_attachment_id );
		} else {
			delete_post_thumbnail( $new_id );
		}
	}
}