<?php
/**
 * Metadata module: exposes provider definitions to the admin app and the live badge hook.
 *
 * @package StreamSera
 */

namespace StreamSera\Modules;

use StreamSera\Metadata\Describable;
use StreamSera\Metadata\Providers;

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

/**
 * Provider definitions and the live badge label.
 */
class Metadata {

	/**
	 * Hook in.
	 */
	public function register() {
		add_filter( 'streamsera_admin_data', array( $this, 'admin_data' ) );
		add_filter( 'streamsera_now_playing', array( $this, 'badge' ), 99, 2 );
	}

	/**
	 * Provider definitions for the station editor.
	 *
	 * @return array
	 */
	public static function definitions() {
		$defs = array();
		foreach ( Providers::all() as $id => $provider ) {
			$def    = $provider instanceof Describable ? (array) $provider->definition() : array();
			$defs[] = array_merge(
				array(
					'id'          => $id,
					'label'       => ucfirst( $id ),
					'description' => '',
					'fields'      => array(),
					'usesUrl'     => false,
					'usesMount'   => false,
					'testPath'    => '',
				),
				$def,
				array( 'id' => $id )
			);
		}
		/**
		 * Filter provider definitions shown in the admin.
		 *
		 * @param array $defs Definitions.
		 */
		return apply_filters( 'streamsera_metadata_provider_definitions', $defs );
	}

	/**
	 * Add definitions to the admin bootstrap.
	 *
	 * @param array $data Data.
	 * @return array
	 */
	public function admin_data( $data ) {
		$data['metadataProviders'] = self::definitions();
		return $data;
	}

	/**
	 * Let add-ons (DJ detection and others) set the live badge label.
	 *
	 * @param array $payload    Now playing.
	 * @param int   $station_id Station.
	 * @return array
	 */
	public function badge( $payload, $station_id ) {
		$current = isset( $payload['badge'] ) ? (string) $payload['badge'] : '';
		if ( '' === $current && ! empty( $payload['dj'] ) ) {
			$current = (string) $payload['dj'];
		}
		/**
		 * Filter the live badge text shown in the player ('' keeps the player's own label).
		 *
		 * @param string $text       Badge text.
		 * @param array  $payload    Now playing payload.
		 * @param int    $station_id Station.
		 */
		$payload['badge'] = (string) apply_filters( 'streamsera_live_badge_text', $current, $payload, $station_id );
		return $payload;
	}
}