<?php
/**
 * Shoutcast v2 (stats?json=1) and v1 (7.html) provider.
 *
 * @package StreamSera
 */

namespace StreamSera\Metadata;

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

/**
 * Shoutcast.
 */
class Shoutcast implements Provider, Describable {

	/**
	 * {@inheritdoc}
	 */
	public function id() {
		return 'shoutcast';
	}

	/**
	 * {@inheritdoc}
	 */
	public function definition() {
		return array(
			'label'       => 'Shoutcast (stats / 7.html)',
			'description' => __( 'Reads /stats?json=1 (v2) or /7.html (v1) on the stream host.', 'streamsera' ),
			'usesUrl'     => true,
			'usesMount'   => false,
		);
	}

	/**
	 * {@inheritdoc}
	 *
	 * @param array $source Source definition (url, mount, stream_url).
	 */
	public function fetch( array $source ) {
		$base = ! empty( $source['url'] ) ? $source['url'] : Resolver::status_url( $source['stream_url'], '' );
		if ( ! $base ) {
			return null;
		}
		$base = untrailingslashit( preg_replace( '#/(stats|7\.html).*$#', '', $base ) );

		// v2 JSON.
		$body = Resolver::http_get( $base . '/stats?json=1' );
		if ( $body ) {
			$json = json_decode( $body, true );
			if ( is_array( $json ) && isset( $json['songtitle'] ) && is_scalar( $json['songtitle'] ) ) {
				$parts = Resolver::split_title( (string) $json['songtitle'] );
				return array(
					'title'       => $parts['title'],
					'artist'      => $parts['artist'],
					'raw'         => (string) $json['songtitle'],
					'listeners'   => isset( $json['currentlisteners'] ) ? (int) $json['currentlisteners'] : null,
					'live'        => ! empty( $json['streamstatus'] ),
					'server'      => 'shoutcast',
					'bitrate'     => isset( $json['bitrate'] ) ? (int) $json['bitrate'] : null,
					'server_name' => isset( $json['servertitle'] ) && is_scalar( $json['servertitle'] ) ? (string) $json['servertitle'] : '',
				);
			}
		}

		// v1 7.html: "current,status,peak,max,unique,bitrate,title".
		$body = Resolver::http_get( $base . '/7.html' );
		if ( $body ) {
			$text = wp_strip_all_tags( $body );
			$cols = explode( ',', $text, 7 );
			if ( count( $cols ) >= 7 ) {
				$parts = Resolver::split_title( trim( $cols[6] ) );
				return array(
					'title'       => $parts['title'],
					'artist'      => $parts['artist'],
					'raw'         => trim( $cols[6] ),
					'listeners'   => (int) $cols[0],
					'live'        => '1' === trim( $cols[1] ),
					'server'      => 'shoutcast',
					'bitrate'     => (int) $cols[5],
					'server_name' => '',
				);
			}
		}

		return null;
	}
}