<?php

require_once VPHQ_ROOT . '/custom-pages/class.videopress-hq-custom-page-edit.php';
require_once VPHQ_ROOT . '/class.videopress-hq-uploader.php';

/**
 * Custom pages for VideoPressHQ.
 * When the query var vp-custom-page is set, the template_include filter will be used to load a custom template.
 *
 * In order to add a new page, you should hook to 'vphq_custom_admin_page_exists-<your page name>' with __return_true.
 * Then, you can hook to 'vphq_custom_admin_page_pre_render-<your page name>' to register/queue js/css files or take actions before your page gets rendered.
 * By default, the rendered template will be VPHQ_ROOT . '/custom-pages/' . <your page name> . '.php', but you can also hook to 'vphq_custom_admin_page_template-<your page name>' to change that.
 *
 * Alternatively, you can add your page in the array $simple_pages in register_simple_admin_pages and it will be automatically registered.
 * Available options there are :
 * - has_css : boolean, whether to register a css file for this page. The css file should be located in /assets/css/custom-page-<your page name>.css
 * - has_js : boolean, whether to register a js file for this page. The js file should be located in /assets/js/custom-page-<your page name>/index.js
 * - has_menu : boolean, whether to show the side menu when the page is rendered.
 * - on_include/on_render : callable, a function to call before rendering the page (both are called one after the other).
 */
class VideoPressHQCustomAdminPage {

	private const QUERY_VAR = 'vp-custom-page';

	private const ADMIN_PAGE_CSS_KEY = 'custom-page-admin-style';

	private const EDIT_HELPERS_JS_KEY  = 'custom-page-edit-helpers-scripts';
	private const EDIT_HELPERS_CSS_KEY = 'custom-page-edit-helpers-style';

	private const EDIT_PLAYLIST_CSS_KEY = 'custom-page-edit-playlist-style';
	private const EDIT_PLAYLIST_JS_KEY  = 'custom-page-edit-playlist-scripts';

	public static function register() {
		$current_user = wp_get_current_user();
		// No need to register this for non-logged in users.
		if ( ! $current_user || $current_user->ID <= 0 ) {
			return;
		}
		add_action( 'template_include', array( __CLASS__, 'template_include' ) );

		self::register_simple_admin_pages();
	}

	private static function register_simple_admin_pages() {
		$simple_pages = array(
			'dashboard'            => array( 'has_css' => false ),
			'appearance'           => array(
				'has_css'    => true,
				'has_js'     => true,
				'on_include' => function() {
					wp_register_style( 'coloris-color-picker-css', get_template_directory_uri() . '/assets/css/coloris.min.css' );
					wp_register_script( 'coloris-color-picker-js', get_template_directory_uri() . '/assets/js/coloris.min.js' );
					self::register_edit_helpers();
				},
				'on_render'  => function() {
					wp_enqueue_style( 'coloris-color-picker-css' );
					wp_enqueue_script( 'coloris-color-picker-js' );
					self::include_edit_helpers();
				},
			),
			'manage-comments'      => array( 'has_css' => true ),
			'manage-categories'    => array(
				'has_css'    => true,
				'has_js'     => true,
				'localize'   => array(
					'manageCategoriesTranslations' => array(
						'script' => self::get_custom_page_js_handle( 'manage-categories' ),
						'values' => array(
							'confirmDelete' => __( 'Do you really want to delete this category? This action cannot be undone.', 'videopress-hq' ),
						),
					)
				),
			),
			'manage-playlists'     => array( 'has_css' => true ),
			'manage-videos'        => array(
				'has_css' => true,
				'has_js'  => true,
			),
			'edit'                 => array(
				'on_include' => function () {
					self::register_edit_helpers();
					VideoPressHQCustomPageEdit::on_include();
				},
				'on_render'  => function () {
					self::include_edit_helpers();
					VideoPressHQCustomPageEdit::on_render();
				},
			),
			'edit-playlist'        => array(
				'on_include' => array( __CLASS__, 'edit_playlists_on_include' ),
				'on_render'  => array( __CLASS__, 'edit_playlists_on_render' ),
			),
			'onboarding-upload'    => array(
				'has_menu'   => false,
				'has_css'    => true,
				'on_include' => array( VideoPressHQUploader::class, 'on_include' ),
				'on_render'  => array( VideoPressHQUploader::class, 'on_render' ),
			),
			'onboarding'           => array(
				'has_menu'   => false,
				'has_css'    => true,
				'has_js'     => true,
				'on_include' => array( __CLASS__, 'onboarding_on_include' ),
				'on_render'  => function () {
					self::include_edit_helpers();
				},
			),
			'onboarding-clear'     => array(),
			'onboarding-customize' => array(
				'has_menu'   => false,
				'has_css'    => true,
				'has_js'     => true,
				'on_include' => array( __CLASS__, 'onboarding_customize_on_include' ),
				'on_render'  => function () {
					self::include_edit_helpers();
				},
			),
		);

		foreach ( $simple_pages as $page => $props ) {
			add_filter( 'vphq_custom_admin_page_exists-' . $page, '__return_true' );

			if ( isset( $props['on_include'] ) ) {
				add_action( 'vphq_custom_admin_page_pre_render-' . $page, $props['on_include'] );
			}

			if ( isset( $props['on_render'] ) ) {
				add_action( 'vphq_custom_admin_page_pre_render-' . $page, $props['on_render'] );
			}

			if ( isset( $props['has_css'] ) && $props['has_css'] ) {
				add_action(
					'vphq_custom_admin_page_pre_render-' . $page,
					function () use ( $page ) {
						wp_enqueue_style( self::get_custom_page_css_handle( $page ), get_template_directory_uri() . '/assets/css/custom-page-' . $page . '.css' );
					}
				);
			}

			if ( isset( $props['has_js'] ) && $props['has_js'] ) {
				add_action(
					'vphq_custom_admin_page_pre_render-' . $page,
					function () use ( $page ) {
						wp_enqueue_script(
							self::get_custom_page_js_handle( $page ),
							get_template_directory_uri() . '/assets/js/custom-page-' . $page . '/index.js',
							array( VideoPressHQ::GLOBAL_FUNCTIONS_SCRIPT_ID )
						);
					}
				);
			}

			if ( isset( $props['localize'] ) ) {
				foreach( $props['localize'] as $localize_key => $localize_data ) {
					add_action(
						'vphq_custom_admin_page_pre_render-' . $page,
						function () use ( $localize_key, $localize_data ) {
							wp_localize_script( $localize_data['script'], $localize_key, $localize_data['values'] );
						}
					);
				}
			}

			if ( isset( $props['has_menu'] ) && ! $props['has_menu'] ) {
				add_action(
					'vphq_custom_admin_page_pre_render-' . $page,
					function () use ( $page ) {
						add_filter( VideoPressHQAdmin::FILTER_ADMIN_HAS_MENU, '__return_false' );
					}
				);
			}
		}
	}

	public static function template_include( $template ) {
		$custom_page = trim( sanitize_text_field( get_query_var( self::QUERY_VAR ) ) );
		if ( empty( $custom_page ) ) {
			return $template;
		}

		$custom_page_exists = apply_filters( 'vphq_custom_admin_page_exists-' . $custom_page, false );
		if ( ! $custom_page_exists ) {
			return $template;
		}

		wp_register_style( self::ADMIN_PAGE_CSS_KEY, get_template_directory_uri() . '/assets/css/custom-page-admin.css' );
		return VPHQ_ROOT . '/custom-pages/template.php';
	}

	public static function get_custom_page_css_handle( $custom_page_name ) {
		return 'custom-page-' . $custom_page_name . '-css';
	}

	public static function get_custom_page_js_handle( $custom_page_name ) {
		return 'custom-page-' . $custom_page_name . '-js';
	}

	public static function render_page() {
		$custom_page = trim( sanitize_text_field( get_query_var( self::QUERY_VAR ) ) );
		if ( empty( $custom_page ) ) {
			/// @todo: 404 ?
			return '';
		}

		$custom_page_exists = apply_filters( 'vphq_custom_admin_page_exists-' . $custom_page, false );
		if ( ! $custom_page_exists ) {
			/// @todo 404 ?
			return '';
		}

		wp_register_script( self::get_custom_page_js_handle( 'admin-template' ), get_template_directory_uri() . '/assets/js/custom-page-admin-template/index.js', array( VideoPressHQ::GLOBAL_FUNCTIONS_SCRIPT_ID ) );

		do_action( 'vphq_custom_admin_page_pre_render-' . $custom_page );

		wp_enqueue_style( 'dashicons' );
		wp_enqueue_style( self::ADMIN_PAGE_CSS_KEY );

		wp_enqueue_style( self::get_custom_page_css_handle( $custom_page ) );
		wp_enqueue_script( self::get_custom_page_js_handle( 'admin-template' ) );
		wp_enqueue_script( self::get_custom_page_js_handle( $custom_page ) );

		$page_template = VPHQ_ROOT . '/custom-pages/' . $custom_page . '.php';
		$page_template = apply_filters( 'vphq_custom_admin_page_template-' . $custom_page, $page_template );

		if ( empty( $page_template ) ) {
			/// @todo 404 ?
			return '';
		}

		ob_start();

		block_template_part( 'header' );
		include VPHQ_ROOT . '/custom-pages/admin-template.php';
		block_template_part( 'footer' );

		return ob_get_clean();
	}

	private static function register_edit_helpers() {
		wp_register_style( self::EDIT_HELPERS_CSS_KEY, get_template_directory_uri() . '/assets/css/edit-helpers.css' );
		wp_register_script( self::EDIT_HELPERS_JS_KEY, get_template_directory_uri() . '/assets/js/edit-helpers.js' );
		wp_localize_script(
			self::EDIT_HELPERS_JS_KEY,
			'videopressHqEditHelpers',
			array(
				'ajaxUrl'        => vphq_get_admin_url( 'admin-ajax.php' ),
				'templateDirUri' => get_template_directory_uri(),
				'loadingText'    => __( 'Please wait' ),
			)
		);
	}

	private static function include_edit_helpers() {
		wp_enqueue_script( self::EDIT_HELPERS_JS_KEY );
		wp_enqueue_style( self::EDIT_HELPERS_CSS_KEY );
	}

	public static function edit_playlists_on_include() {
		self::register_edit_helpers();

		wp_register_style( self::EDIT_PLAYLIST_CSS_KEY, get_template_directory_uri() . '/assets/css/custom-page-edit-playlist.css' );
		wp_register_script( self::EDIT_PLAYLIST_JS_KEY, get_template_directory_uri() . '/assets/js/custom-page-edit-playlist/index.js', array( VideoPressHQ::GLOBAL_FUNCTIONS_SCRIPT_ID, self::EDIT_HELPERS_JS_KEY ) );
		wp_localize_script(
			self::EDIT_PLAYLIST_JS_KEY,
			'editPlaylistTr',
			array(
				'confirmDelete'      => __( 'Do you really want to delete this playlist? This action cannot be undone.' ),
				'managePlaylistsUri' => vphq_admin_page_link( 'playlists' ),
				'addVideoText'       => __( 'Add to playlist' ),
				'viewVideoText'      => __( 'View' ),
			)
		);
	}

	public static function edit_playlists_on_render() {
		self::include_edit_helpers();

		wp_enqueue_script( self::EDIT_PLAYLIST_JS_KEY, array( VideoPressHQ::GLOBAL_FUNCTIONS_SCRIPT_ID, self::EDIT_HELPERS_JS_KEY ) );
		wp_enqueue_style( self::EDIT_PLAYLIST_CSS_KEY );
	}

	public static function onboarding_on_include() {
		self::register_edit_helpers();

		wp_register_script(
			self::get_custom_page_js_handle( 'onboarding' ),
			get_template_directory_uri() . '/assets/js/custom-page-onboarding/index.js',
			array( VideoPressHQ::GLOBAL_FUNCTIONS_SCRIPT_ID, self::EDIT_HELPERS_JS_KEY )
		);

		wp_localize_script(
			self::get_custom_page_js_handle( 'onboarding' ),
			'onboardingTranslations',
			array(
				'loadingText' => array(
					__( 'Analyzing description...' ),
					__( 'Generating channel info...' ),
					__( 'Generating theme...' ),
					__( 'Customizing theme...' ),
					__( 'Preparing channel...' ),
					__( 'Almost ready...' ),
				),
				'redirectUrl' => vphq_admin_page_link( 'onboarding/customize' ),
			)
		);
	}

	public static function onboarding_customize_on_include() {
		self::register_edit_helpers();

		wp_register_script(
			self::get_custom_page_js_handle( 'onboarding-customize' ),
			get_template_directory_uri() . '/assets/js/custom-page-onboarding-customize/index.js',
			array( VideoPressHQ::GLOBAL_FUNCTIONS_SCRIPT_ID, self::EDIT_HELPERS_JS_KEY )
		);

		wp_localize_script(
			self::get_custom_page_js_handle( 'onboarding-customize' ),
			'onboardingTranslations',
			array(
				'redirectUrl' => vphq_admin_page_link( 'onboarding/upload' ),
			)
		);
	}

}