<?php
/**
 * Album custom post type.
 *
 * @package WP_FediStream
 */

namespace WP_FediStream\PostTypes;

// Prevent direct file access.
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

/**
 * Album post type class.
 *
 * Handles registration and management of albums/releases.
 */
class Album extends AbstractPostType {

    /**
     * Post type key.
     *
     * @var string
     */
    protected string $post_type = 'fedistream_album';

    /**
     * Meta key prefix.
     *
     * @var string
     */
    private const META_PREFIX = '_fedistream_album_';

    /**
     * Register the post type.
     *
     * @return void
     */
    public function register(): void {
        $labels = array(
            'name'                  => _x( 'Albums', 'Post type general name', 'wp-fedistream' ),
            'singular_name'         => _x( 'Album', 'Post type singular name', 'wp-fedistream' ),
            'menu_name'             => _x( 'Albums', 'Admin Menu text', 'wp-fedistream' ),
            'name_admin_bar'        => _x( 'Album', 'Add New on Toolbar', 'wp-fedistream' ),
            'add_new'               => __( 'Add New', 'wp-fedistream' ),
            'add_new_item'          => __( 'Add New Album', 'wp-fedistream' ),
            'new_item'              => __( 'New Album', 'wp-fedistream' ),
            'edit_item'             => __( 'Edit Album', 'wp-fedistream' ),
            'view_item'             => __( 'View Album', 'wp-fedistream' ),
            'all_items'             => __( 'All Albums', 'wp-fedistream' ),
            'search_items'          => __( 'Search Albums', 'wp-fedistream' ),
            'parent_item_colon'     => __( 'Parent Albums:', 'wp-fedistream' ),
            'not_found'             => __( 'No albums found.', 'wp-fedistream' ),
            'not_found_in_trash'    => __( 'No albums found in Trash.', 'wp-fedistream' ),
            'featured_image'        => _x( 'Album Artwork', 'Overrides the "Featured Image" phrase', 'wp-fedistream' ),
            'set_featured_image'    => _x( 'Set album artwork', 'Overrides the "Set featured image" phrase', 'wp-fedistream' ),
            'remove_featured_image' => _x( 'Remove album artwork', 'Overrides the "Remove featured image" phrase', 'wp-fedistream' ),
            'use_featured_image'    => _x( 'Use as album artwork', 'Overrides the "Use as featured image" phrase', 'wp-fedistream' ),
            'archives'              => _x( 'Album archives', 'The post type archive label', 'wp-fedistream' ),
            'insert_into_item'      => _x( 'Insert into album', 'Overrides the "Insert into post" phrase', 'wp-fedistream' ),
            'uploaded_to_this_item' => _x( 'Uploaded to this album', 'Overrides the "Uploaded to this post" phrase', 'wp-fedistream' ),
            'filter_items_list'     => _x( 'Filter albums list', 'Screen reader text', 'wp-fedistream' ),
            'items_list_navigation' => _x( 'Albums list navigation', 'Screen reader text', 'wp-fedistream' ),
            'items_list'            => _x( 'Albums list', 'Screen reader text', 'wp-fedistream' ),
        );

        $args = array(
            'labels'             => $labels,
            'public'             => true,
            'publicly_queryable' => true,
            'show_ui'            => true,
            'show_in_menu'       => false, // Will be added to custom menu.
            'query_var'          => true,
            'rewrite'            => array( 'slug' => 'albums' ),
            'capability_type'    => array( 'fedistream_album', 'fedistream_albums' ),
            'map_meta_cap'       => true,
            'has_archive'        => true,
            'hierarchical'       => false,
            'menu_position'      => null,
            'menu_icon'          => 'dashicons-album',
            'supports'           => array( 'title', 'editor', 'thumbnail', 'excerpt', 'revisions' ),
            'show_in_rest'       => true,
            'rest_base'          => 'albums',
        );

        register_post_type( $this->post_type, $args );
    }

    /**
     * Add meta boxes.
     *
     * @return void
     */
    public function add_meta_boxes(): void {
        add_meta_box(
            'fedistream_album_info',
            __( 'Album Information', 'wp-fedistream' ),
            array( $this, 'render_info_meta_box' ),
            $this->post_type,
            'normal',
            'high'
        );

        add_meta_box(
            'fedistream_album_artist',
            __( 'Artist', 'wp-fedistream' ),
            array( $this, 'render_artist_meta_box' ),
            $this->post_type,
            'side',
            'high'
        );

        add_meta_box(
            'fedistream_album_codes',
            __( 'Album Codes', 'wp-fedistream' ),
            array( $this, 'render_codes_meta_box' ),
            $this->post_type,
            'side',
            'default'
        );
    }

    /**
     * Render album info meta box.
     *
     * @param \WP_Post $post Post object.
     * @return void
     */
    public function render_info_meta_box( \WP_Post $post ): void {
        wp_nonce_field( 'fedistream_album_save', 'fedistream_album_nonce' );

        $album_type     = get_post_meta( $post->ID, self::META_PREFIX . 'type', true );
        $release_date   = get_post_meta( $post->ID, self::META_PREFIX . 'release_date', true );
        $total_tracks   = get_post_meta( $post->ID, self::META_PREFIX . 'total_tracks', true );
        $total_duration = get_post_meta( $post->ID, self::META_PREFIX . 'total_duration', true );
        ?>
        <table class="form-table">
            <tr>
                <th scope="row">
                    <label for="fedistream_album_type"><?php esc_html_e( 'Release Type', 'wp-fedistream' ); ?></label>
                </th>
                <td>
                    <select name="fedistream_album_type" id="fedistream_album_type">
                        <option value="album" <?php selected( $album_type, 'album' ); ?>><?php esc_html_e( 'Album', 'wp-fedistream' ); ?></option>
                        <option value="ep" <?php selected( $album_type, 'ep' ); ?>><?php esc_html_e( 'EP', 'wp-fedistream' ); ?></option>
                        <option value="single" <?php selected( $album_type, 'single' ); ?>><?php esc_html_e( 'Single', 'wp-fedistream' ); ?></option>
                        <option value="compilation" <?php selected( $album_type, 'compilation' ); ?>><?php esc_html_e( 'Compilation', 'wp-fedistream' ); ?></option>
                        <option value="live" <?php selected( $album_type, 'live' ); ?>><?php esc_html_e( 'Live Album', 'wp-fedistream' ); ?></option>
                        <option value="remix" <?php selected( $album_type, 'remix' ); ?>><?php esc_html_e( 'Remix Album', 'wp-fedistream' ); ?></option>
                    </select>
                </td>
            </tr>
            <tr>
                <th scope="row">
                    <label for="fedistream_album_release_date"><?php esc_html_e( 'Release Date', 'wp-fedistream' ); ?></label>
                </th>
                <td>
                    <input type="date" name="fedistream_album_release_date" id="fedistream_album_release_date" value="<?php echo esc_attr( $release_date ); ?>" class="regular-text">
                </td>
            </tr>
            <tr>
                <th scope="row">
                    <label for="fedistream_album_total_tracks"><?php esc_html_e( 'Total Tracks', 'wp-fedistream' ); ?></label>
                </th>
                <td>
                    <input type="number" name="fedistream_album_total_tracks" id="fedistream_album_total_tracks" value="<?php echo esc_attr( $total_tracks ); ?>" min="1" max="999" class="small-text">
                    <p class="description"><?php esc_html_e( 'Auto-calculated when tracks are added.', 'wp-fedistream' ); ?></p>
                </td>
            </tr>
            <tr>
                <th scope="row">
                    <label for="fedistream_album_total_duration"><?php esc_html_e( 'Total Duration', 'wp-fedistream' ); ?></label>
                </th>
                <td>
                    <input type="number" name="fedistream_album_total_duration" id="fedistream_album_total_duration" value="<?php echo esc_attr( $total_duration ); ?>" min="0" class="small-text" readonly>
                    <span class="description"><?php esc_html_e( 'seconds (auto-calculated)', 'wp-fedistream' ); ?></span>
                </td>
            </tr>
        </table>
        <?php
    }

    /**
     * Render artist selection meta box.
     *
     * @param \WP_Post $post Post object.
     * @return void
     */
    public function render_artist_meta_box( \WP_Post $post ): void {
        $selected_artist = get_post_meta( $post->ID, self::META_PREFIX . 'artist', true );

        $artists = get_posts(
            array(
                'post_type'      => 'fedistream_artist',
                'posts_per_page' => -1,
                'post_status'    => 'publish',
                'orderby'        => 'title',
                'order'          => 'ASC',
            )
        );
        ?>
        <p>
            <label for="fedistream_album_artist"><?php esc_html_e( 'Primary Artist', 'wp-fedistream' ); ?></label>
        </p>
        <select name="fedistream_album_artist" id="fedistream_album_artist" class="widefat">
            <option value=""><?php esc_html_e( '— Select Artist —', 'wp-fedistream' ); ?></option>
            <?php foreach ( $artists as $artist ) : ?>
                <option value="<?php echo esc_attr( $artist->ID ); ?>" <?php selected( $selected_artist, $artist->ID ); ?>>
                    <?php echo esc_html( $artist->post_title ); ?>
                </option>
            <?php endforeach; ?>
        </select>
        <p class="description">
            <?php
            if ( empty( $artists ) ) {
                printf(
                    /* translators: %s: URL to add new artist */
                    esc_html__( 'No artists found. %s', 'wp-fedistream' ),
                    '<a href="' . esc_url( admin_url( 'post-new.php?post_type=fedistream_artist' ) ) . '">' . esc_html__( 'Add an artist first.', 'wp-fedistream' ) . '</a>'
                );
            }
            ?>
        </p>
        <?php
    }

    /**
     * Render album codes meta box.
     *
     * @param \WP_Post $post Post object.
     * @return void
     */
    public function render_codes_meta_box( \WP_Post $post ): void {
        $upc            = get_post_meta( $post->ID, self::META_PREFIX . 'upc', true );
        $catalog_number = get_post_meta( $post->ID, self::META_PREFIX . 'catalog_number', true );
        ?>
        <p>
            <label for="fedistream_album_upc"><?php esc_html_e( 'UPC/EAN', 'wp-fedistream' ); ?></label>
            <input type="text" name="fedistream_album_upc" id="fedistream_album_upc" value="<?php echo esc_attr( $upc ); ?>" class="widefat" pattern="[0-9]{12,13}" title="<?php esc_attr_e( '12-13 digit UPC/EAN code', 'wp-fedistream' ); ?>">
        </p>
        <p>
            <label for="fedistream_album_catalog_number"><?php esc_html_e( 'Catalog Number', 'wp-fedistream' ); ?></label>
            <input type="text" name="fedistream_album_catalog_number" id="fedistream_album_catalog_number" value="<?php echo esc_attr( $catalog_number ); ?>" class="widefat">
        </p>
        <?php
    }

    /**
     * Save post meta.
     *
     * @param int      $post_id Post ID.
     * @param \WP_Post $post    Post object.
     * @return void
     */
    public function save_meta( int $post_id, \WP_Post $post ): void {
        if ( ! $this->can_save( $post_id, 'fedistream_album_save', 'fedistream_album_nonce' ) ) {
            return;
        }

        // Save album type.
        if ( isset( $_POST['fedistream_album_type'] ) ) {
            $allowed_types = array( 'album', 'ep', 'single', 'compilation', 'live', 'remix' );
            $type          = sanitize_text_field( wp_unslash( $_POST['fedistream_album_type'] ) );
            if ( in_array( $type, $allowed_types, true ) ) {
                update_post_meta( $post_id, self::META_PREFIX . 'type', $type );
            }
        }

        // Save other fields.
        $this->save_date_meta( $post_id, self::META_PREFIX . 'release_date', 'fedistream_album_release_date' );
        $this->save_int_meta( $post_id, self::META_PREFIX . 'artist', 'fedistream_album_artist' );
        $this->save_int_meta( $post_id, self::META_PREFIX . 'total_tracks', 'fedistream_album_total_tracks' );
        $this->save_text_meta( $post_id, self::META_PREFIX . 'upc', 'fedistream_album_upc' );
        $this->save_text_meta( $post_id, self::META_PREFIX . 'catalog_number', 'fedistream_album_catalog_number' );
    }

    /**
     * Get album by ID with meta.
     *
     * @param int $post_id Post ID.
     * @return array|null Album data or null.
     */
    public static function get_album( int $post_id ): ?array {
        $post = get_post( $post_id );
        if ( ! $post || 'fedistream_album' !== $post->post_type ) {
            return null;
        }

        $artist_id = get_post_meta( $post_id, self::META_PREFIX . 'artist', true );

        return array(
            'id'             => $post->ID,
            'title'          => $post->post_title,
            'slug'           => $post->post_name,
            'description'    => $post->post_content,
            'excerpt'        => $post->post_excerpt,
            'type'           => get_post_meta( $post_id, self::META_PREFIX . 'type', true ) ?: 'album',
            'release_date'   => get_post_meta( $post_id, self::META_PREFIX . 'release_date', true ),
            'artist_id'      => $artist_id,
            'artist_name'    => $artist_id ? get_the_title( $artist_id ) : '',
            'total_tracks'   => (int) get_post_meta( $post_id, self::META_PREFIX . 'total_tracks', true ),
            'total_duration' => (int) get_post_meta( $post_id, self::META_PREFIX . 'total_duration', true ),
            'upc'            => get_post_meta( $post_id, self::META_PREFIX . 'upc', true ),
            'catalog_number' => get_post_meta( $post_id, self::META_PREFIX . 'catalog_number', true ),
            'artwork'        => get_the_post_thumbnail_url( $post_id, 'large' ),
            'url'            => get_permalink( $post_id ),
        );
    }

    /**
     * Update album track count and duration.
     *
     * @param int $album_id Album post ID.
     * @return void
     */
    public static function update_album_stats( int $album_id ): void {
        $tracks = get_posts(
            array(
                'post_type'      => 'fedistream_track',
                'posts_per_page' => -1,
                'post_status'    => 'publish',
                'meta_key'       => '_fedistream_track_album',
                'meta_value'     => $album_id,
            )
        );

        $total_tracks   = count( $tracks );
        $total_duration = 0;

        foreach ( $tracks as $track ) {
            $duration        = (int) get_post_meta( $track->ID, '_fedistream_track_duration', true );
            $total_duration += $duration;
        }

        update_post_meta( $album_id, self::META_PREFIX . 'total_tracks', $total_tracks );
        update_post_meta( $album_id, self::META_PREFIX . 'total_duration', $total_duration );
    }
}