<?php
/**
 * Gallery post type and data access.
 *
 * @package 3pika-gallery
 */

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

class TPIKA_Post_Type {

	const TYPE = 'tpika_gallery';

	public static function register() {
		register_post_type(
			self::TYPE,
			array(
				'labels'              => array(
					'name'          => __( 'Galleries', '3pika-gallery' ),
					'singular_name' => __( 'Gallery', '3pika-gallery' ),
				),
				'public'              => false,
				'show_ui'             => false,
				'show_in_menu'        => false,
				'show_in_rest'        => false,
				'exclude_from_search' => true,
				'publicly_queryable'  => false,
				'rewrite'             => false,
				'query_var'           => false,
				'supports'            => array( 'title', 'author' ),
				'capability_type'     => 'post',
				'map_meta_cap'        => true,
			)
		);
	}

	/**
	 * Load full gallery data.
	 *
	 * @param int $id Gallery ID.
	 * @return array|null
	 */
	public static function get( $id ) {
		$post = get_post( $id );
		if ( ! $post || self::TYPE !== $post->post_type ) {
			return null;
		}
		$images   = get_post_meta( $post->ID, '_tpika_images', true );
		$filters  = get_post_meta( $post->ID, '_tpika_filters', true );
		$settings = get_post_meta( $post->ID, '_tpika_settings', true );

		return array(
			'id'       => $post->ID,
			'title'    => $post->post_title,
			'status'   => $post->post_status,
			'images'   => is_array( $images ) ? array_values( $images ) : array(),
			'filters'  => is_array( $filters ) ? array_values( $filters ) : array(),
			'settings' => wp_parse_args( is_array( $settings ) ? $settings : array(), TPIKA_Settings::get() ),
		);
	}

	/**
	 * Create or update a gallery. Input must already be sanitized.
	 *
	 * @param int    $id       0 to create.
	 * @param string $title    Title.
	 * @param array  $images   Images.
	 * @param array  $filters  Filters.
	 * @param array  $settings Settings.
	 * @return int|WP_Error
	 */
	public static function save( $id, $title, $images, $filters, $settings ) {
		$args = array(
			'post_type'   => self::TYPE,
			'post_title'  => $title ? $title : __( 'Untitled gallery', '3pika-gallery' ),
			'post_status' => 'publish',
		);
		if ( $id ) {
			$args['ID'] = $id;
			$result     = wp_update_post( $args, true );
		} else {
			$result = wp_insert_post( $args, true );
		}
		if ( is_wp_error( $result ) ) {
			return $result;
		}
		$id = (int) $result;
		update_post_meta( $id, '_tpika_images', $images );
		update_post_meta( $id, '_tpika_filters', $filters );
		update_post_meta( $id, '_tpika_settings', $settings );
		do_action( 'tpika_gallery_saved', $id );
		return $id;
	}

	/**
	 * Sanitize images list from the builder.
	 *
	 * @param array $images     Raw images.
	 * @param array $filter_ids Allowed filter IDs.
	 * @return array
	 */
	public static function sanitize_images( $images, $filter_ids ) {
		$out = array();
		if ( ! is_array( $images ) ) {
			return $out;
		}
		foreach ( $images as $img ) {
			if ( ! is_array( $img ) ) {
				continue;
			}
			$type = 'image';
			$att = isset( $img['id'] ) ? absint( $img['id'] ) : 0;
			if ( $att && 'attachment' !== get_post_type( $att ) ) {
				$att = 0;
			}
			$item = array(
				'type'    => $type,
				'id'      => $att,
				'caption' => isset( $img['caption'] ) ? sanitize_textarea_field( $img['caption'] ) : '',
				'alt'     => isset( $img['alt'] ) ? sanitize_text_field( $img['alt'] ) : '',
				'link'    => isset( $img['link'] ) ? esc_url_raw( $img['link'] ) : '',
				'filters' => array(),
			);
			$valid = (bool) $att;
			if ( ! $valid ) {
				continue;
			}
			if ( isset( $img['filters'] ) && is_array( $img['filters'] ) ) {
				foreach ( $img['filters'] as $f ) {
					$f = sanitize_key( $f );
					if ( in_array( $f, $filter_ids, true ) ) {
						$item['filters'][] = $f;
					}
				}
			}
			$out[] = $item;
		}
		return $out;
	}

	/**
	 * Sanitize filters list.
	 *
	 * @param array $filters Raw filters.
	 * @return array
	 */
	public static function sanitize_filters( $filters ) {
		$out  = array();
		$seen = array();
		if ( ! is_array( $filters ) ) {
			return $out;
		}
		foreach ( $filters as $f ) {
			if ( ! is_array( $f ) ) {
				continue;
			}
			$id   = isset( $f['id'] ) ? sanitize_key( $f['id'] ) : '';
			$name = isset( $f['name'] ) ? sanitize_text_field( $f['name'] ) : '';
			if ( ! $id || '' === $name || isset( $seen[ $id ] ) ) {
				continue;
			}
			$seen[ $id ] = true;
			$color       = isset( $f['color'] ) ? sanitize_hex_color( $f['color'] ) : '';
			$text        = isset( $f['text'] ) ? sanitize_hex_color( $f['text'] ) : '';
			$out[]       = array(
				'id'    => $id,
				'name'  => $name,
				'color' => $color ? $color : '',
				'text'  => $text ? $text : '',
			);
		}
		return $out;
	}

	/**
	 * Add thumbnail URLs etc. for the admin builder.
	 *
	 * @param array $images Images.
	 * @return array
	 */
	public static function images_for_admin( $images ) {
		foreach ( $images as &$img ) {
			$thumb = '';
			$file  = '';
			if ( ! empty( $img['id'] ) ) {
				$src   = wp_get_attachment_image_src( $img['id'], 'medium' );
				$thumb = $src ? $src[0] : '';
				$path  = get_attached_file( (int) $img['id'] );
				$file  = $path ? wp_basename( $path ) : '';
			}
			$img['thumb'] = $thumb;
			$img['file']  = $file;
		}
		return $images;
	}


	/**
	 * Number of items in a gallery (cheap).
	 *
	 * @param int $id Gallery ID.
	 * @return int
	 */
	public static function count( $id ) {
		$images = get_post_meta( $id, '_tpika_images', true );
		return is_array( $images ) ? count( $images ) : 0;
	}

}