<?php
/**
 * Core plugin class: wires up every subsystem.
 *
 * @package PulpitKit
 */

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

/**
 * Class PulpitKit
 */
class PulpitKit {

	/**
	 * Singleton instance.
	 *
	 * @var PulpitKit|null
	 */
	private static $instance = null;

	/**
	 * Get the singleton instance and register hooks once.
	 *
	 * @return PulpitKit
	 */
	public static function instance() {
		if ( null === self::$instance ) {
			self::$instance = new self();
			self::$instance->init_hooks();
		}
		return self::$instance;
	}

	/**
	 * Register global hooks and instantiate subsystems.
	 */
	private function init_hooks() {
		add_action( 'init', array( 'PulpitKit_Post_Types', 'register_post_types' ) );
		add_action( 'init', array( 'PulpitKit_Post_Types', 'register_taxonomies' ) );
		add_action( 'init', array( 'PulpitKit_Podcast', 'register_feed' ) );
		add_action( 'init', array( $this, 'register_blocks' ) );

		add_action( 'admin_enqueue_scripts', array( $this, 'admin_assets' ) );
		add_action( 'enqueue_block_editor_assets', array( $this, 'block_editor_assets' ) );

		new PulpitKit_Post_Types();
		new PulpitKit_Shortcodes();
		new PulpitKit_Settings();
		new PulpitKit_Importer();
	}

	/**
	 * Enqueue admin assets (media-picker helper) on relevant screens only.
	 *
	 * @param string $hook Current admin page hook.
	 */
	public function admin_assets( $hook ) {
		$screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null;
		$ours   = array( 'settings_page_pulpitkit', 'tools_page_pulpitkit-import' );

		if ( in_array( $hook, $ours, true ) || ( $screen && in_array( $screen->post_type, array( 'pulpitkit_sermon', 'pulpitkit_event' ), true ) ) ) {
			wp_enqueue_media();
			wp_enqueue_script(
				'pulpitkit-admin',
				PULPITKIT_URL . 'assets/js/pulpitkit-admin.js',
				array( 'jquery' ),
				PULPITKIT_VERSION,
				true
			);
		}
	}

	/**
	 * Enqueue block editor script.
	 */
	public function block_editor_assets() {
		wp_enqueue_script(
			'pulpitkit-blocks',
			PULPITKIT_URL . 'assets/js/pulpitkit-blocks.js',
			array( 'wp-blocks', 'wp-element', 'wp-components', 'wp-server-side-render', 'wp-block-editor' ),
			PULPITKIT_VERSION,
			false
		);
	}

	/**
	 * Register server-rendered blocks that mirror the shortcodes.
	 */
	public function register_blocks() {
		if ( ! function_exists( 'register_block_type' ) ) {
			return;
		}

		$shortcodes = new PulpitKit_Shortcodes();

		register_block_type(
			'pulpitkit/sermons',
			array(
				'editor_script'   => 'pulpitkit-blocks',
				'render_callback' => array( $shortcodes, 'render_sermons' ),
				'attributes'      => array(
					'limit'   => array( 'type' => 'number', 'default' => 10 ),
					'series'  => array( 'type' => 'string', 'default' => '' ),
					'speaker' => array( 'type' => 'string', 'default' => '' ),
				),
			)
		);

		register_block_type(
			'pulpitkit/events',
			array(
				'editor_script'   => 'pulpitkit-blocks',
				'render_callback' => array( $shortcodes, 'render_events' ),
				'attributes'      => array(
					'limit' => array( 'type' => 'number', 'default' => 5 ),
				),
			)
		);

		register_block_type(
			'pulpitkit/live',
			array(
				'editor_script'   => 'pulpitkit-blocks',
				'render_callback' => array( $shortcodes, 'render_live' ),
				'attributes'      => array(),
			)
		);
	}

	/**
	 * Default plugin settings.
	 *
	 * @return array
	 */
	public static function default_settings() {
		return array(
			'church_name'             => get_bloginfo( 'name' ),
			'podcast_author'          => get_bloginfo( 'name' ),
			'podcast_email'           => get_bloginfo( 'admin_email' ),
			'podcast_artwork'         => '',
			'podcast_description'     => get_bloginfo( 'description' ),
			'live_youtube_channel_id' => '',
			'live_youtube_url'        => '',
			'live_facebook_url'       => '',
			'service_day'             => 0, // Sunday.
			'service_time'            => '10:30',
			'service_duration'        => 90, // Minutes.
			'live_window_before'      => 15, // Minutes before start to show "live soon/live".
		);
	}

	/**
	 * Fetch a single setting with fallback to defaults.
	 *
	 * @param string $key     Setting key.
	 * @param mixed  $default Fallback when unset.
	 * @return mixed
	 */
	public static function get_setting( $key, $default = '' ) {
		$settings = get_option( 'pulpitkit_settings', array() );
		$defaults = self::default_settings();
		if ( isset( $settings[ $key ] ) && '' !== $settings[ $key ] ) {
			return $settings[ $key ];
		}
		if ( array_key_exists( $key, $defaults ) ) {
			return $defaults[ $key ];
		}
		return $default;
	}

	/**
	 * Enqueue the plugin's self-contained front-end styles.
	 * Safe to call from shortcode callbacks (WP prints late styles in footer).
	 */
	public static function enqueue_styles() {
		wp_enqueue_style(
			'pulpitkit',
			PULPITKIT_URL . 'assets/css/pulpitkit.css',
			array(),
			PULPITKIT_VERSION
		);
	}
}