<?php
/**
 * Shortcode registration.
 *
 * @package ModernAudioPlayer
 */

namespace ModernAudioPlayer;

defined( 'ABSPATH' ) || exit;

class Shortcode {
	/**
	 * Register shortcode hooks.
	 *
	 * @return void
	 */
	public function register() {
		add_shortcode( 'audio_player', array( $this, 'render' ) );
	}

	/**
	 * Render the shortcode.
	 *
	 * @param array<string, mixed> $atts Shortcode attributes.
	 * @return string
	 */
	public function render( $atts ) {
		$atts = shortcode_atts(
			array(
				'src'      => '',
				'title'    => '',
				'image'    => '',
				'playlist' => '',
				'theme'    => '',
			),
			(array) $atts,
			'audio_player'
		);

		$settings = Settings::get();
		$attrs    = array(
			'src'            => $atts['src'],
			'title'          => $atts['title'],
			'image'          => $atts['image'],
			'playlist'       => $this->parse_playlist_attribute( $atts['playlist'] ),
			'theme'          => $atts['theme'] ? $atts['theme'] : $settings['default_theme'],
			'useGlobalTheme' => empty( $atts['theme'] ),
		);

		return Renderer::render_player( $attrs );
	}

	/**
	 * Parse playlist attribute into normalized track items.
	 *
	 * Supported formats:
	 * - JSON array of objects with src/title/image
	 * - Line-based entries: title|src|image
	 *
	 * @param string $playlist_raw Raw playlist value.
	 * @return array<int, array<string, string>>
	 */
	private function parse_playlist_attribute( $playlist_raw ) {
		$playlist_raw = trim( html_entity_decode( (string) $playlist_raw, ENT_QUOTES, get_bloginfo( 'charset' ) ) );

		if ( '' === $playlist_raw ) {
			return array();
		}

		$decoded = json_decode( $playlist_raw, true );

		if ( is_array( $decoded ) ) {
			return $decoded;
		}

		$tracks = array();
		$lines  = preg_split( '/\r\n|\r|\n/', $playlist_raw );

		foreach ( (array) $lines as $line ) {
			$line = trim( (string) $line );

			if ( '' === $line ) {
				continue;
			}

			$parts = array_map( 'trim', explode( '|', $line ) );

			$tracks[] = array(
				'title' => $parts[0] ?? '',
				'src'   => $parts[1] ?? '',
				'image' => $parts[2] ?? '',
			);
		}

		return $tracks;
	}
}