<?php
namespace Akram;

defined( 'ABSPATH' ) || exit;

/**
 * wp-admin integration.
 */
final class Admin {

	const PAGES = array(
		'akram'             => 'Dashboard',
		'akram-templates'   => 'Templates',
		'akram-theme'       => 'Theme Builder',
		'akram-popups'      => 'Popups',
		'akram-submissions' => 'Submissions',
		'akram-design'      => 'Design System',
		'akram-settings'    => 'Settings',
		'akram-tools'       => 'Tools',
	);

	public static function init() {
		add_action( 'admin_menu', array( __CLASS__, 'menu' ) );
		add_action( 'admin_enqueue_scripts', array( __CLASS__, 'assets' ) );
		add_action( 'admin_init', array( __CLASS__, 'welcome_redirect' ) );
		add_action( 'admin_action_akram_new', array( __CLASS__, 'new_post' ) );
		add_filter( 'post_row_actions', array( __CLASS__, 'row_action' ), 10, 2 );
		add_filter( 'page_row_actions', array( __CLASS__, 'row_action' ), 10, 2 );
		add_filter( 'display_post_states', array( __CLASS__, 'post_state' ), 10, 2 );
		add_action( 'edit_form_after_title', array( __CLASS__, 'classic_button' ) );
		add_action( 'enqueue_block_editor_assets', array( __CLASS__, 'block_editor' ) );
		add_action( 'wp_nav_menu_item_custom_fields', array( __CLASS__, 'menu_field' ), 10, 2 );
		add_action( 'wp_update_nav_menu_item', array( __CLASS__, 'menu_save' ), 10, 2 );
		add_filter( 'plugin_action_links_' . plugin_basename( AKRAM_FILE ), array( __CLASS__, 'plugin_links' ) );
		add_action( 'admin_notices', array( __CLASS__, 'notices' ) );
		add_action( 'admin_enqueue_scripts', array( __CLASS__, 'list_button' ) );
	}

	public static function menu() {
		$icon = I18n::brand_logo() ?: Brand::data_uri( '#a7aaad' );
		$cap  = 'edit_pages';
		$brand = trim( (string) Options::get( 'brand_name', '' ) ) ?: 'Akram';
		add_menu_page( $brand, $brand, $cap, 'akram', array( __CLASS__, 'page' ), $icon, 58.5 );
		$labels = array(
			'akram'             => __( 'Dashboard', 'akram' ),
			'akram-templates'   => __( 'Templates', 'akram' ),
			'akram-theme'       => __( 'Theme Builder', 'akram' ),
			'akram-popups'      => __( 'Popups', 'akram' ),
			'akram-submissions' => __( 'Submissions', 'akram' ),
			'akram-design'      => __( 'Design System', 'akram' ),
			'akram-settings'    => __( 'Settings', 'akram' ),
			'akram-tools'       => __( 'Tools', 'akram' ),
		);
		foreach ( $labels as $slug => $label ) {
			$sub_cap = in_array( $slug, array( 'akram-settings', 'akram-tools' ), true ) ? 'manage_options' : ( in_array( $slug, array( 'akram-theme', 'akram-design' ), true ) ? 'edit_theme_options' : $cap );
			if ( 'akram-submissions' === $slug ) {
				$unread = (int) ( wp_count_posts( 'akram_submission' )->private ?? 0 );
				if ( $unread ) {
					$label .= ' <span class="awaiting-mod">' . $unread . '</span>';
				}
			}
			add_submenu_page( 'akram', $label, $label, $sub_cap, $slug, array( __CLASS__, 'page' ) );
		}
	}

	public static function page() {
		echo '<div id="nx-admin" class="nx-admin-root"><div class="nx-admin-loading"></div></div>';
	}

	public static function assets( $hook ) {
		$page = isset( $_GET['page'] ) ? sanitize_key( $_GET['page'] ) : ''; // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only request value; it changes nothing and is sanitised.
		if ( ! isset( self::PAGES[ $page ] ) ) {
			return;
		}
		$file = AKRAM_DIR . 'assets/build/' . Plugin::build_file( 'admin.js' );
		$ver  = file_exists( $file ) ? AKRAM_VERSION . '.' . filemtime( $file ) : AKRAM_VERSION;
		wp_enqueue_media();
		wp_enqueue_style( 'akram-admin', Plugin::build_url( 'admin.css' ), array(), $ver );
		wp_add_inline_style( 'akram-admin', Brand::font_css() );
		wp_enqueue_script( 'akram-admin', Plugin::build_url( 'admin.js' ), array(), $ver, true );
		$menus = array();
		foreach ( wp_get_nav_menus() as $m ) {
			$menus[] = array(
				'id'   => $m->term_id,
				'name' => $m->name,
			);
		}
		wp_add_inline_script(
			'akram-admin',
			'window.AKRAM_ADMIN=' . wp_json_encode(
				array(
					'page'       => $page,
					'rest'       => esc_url_raw( rest_url( Rest::NS . '/' ) ),
					'nonce'      => wp_create_nonce( 'wp_rest' ),
					'admin'      => admin_url(),
					'assets'     => AKRAM_URL . 'assets/',
					'version'    => AKRAM_VERSION,
					'bps'        => Options::breakpoints(),
					'globals'    => Options::globals(),
					'tplTypes'   => Post_Types::type_labels(),
					'newPage'    => self::new_url( 'page' ),
					'newPost'    => self::new_url( 'post' ),
					'canManage'  => Plugin::can_manage(),
					'canDesign'  => current_user_can( 'edit_theme_options' ),
					'i18n'       => I18n::js_map(),
					'rtl'        => I18n::is_rtl(),
					'brand'      => I18n::brand(),
					'brandLogo'  => I18n::brand_logo(),
					'locale'     => get_user_locale(),
					'unfiltered' => current_user_can( 'unfiltered_html' ),
					'user'       => wp_get_current_user()->display_name,
					'site'       => array(
						'name' => get_bloginfo( 'name' ),
						'url'  => home_url( '/' ),
					),
					'postTypes'  => array_values( array_map( static function ( $pt ) {
						return array( $pt->name, $pt->labels->name );
					}, get_post_types( array( 'public' => true ), 'objects' ) ) ),
					'taxonomies' => array_values( array_map( static function ( $t ) {
						return array( $t->name, $t->labels->name );
					}, get_taxonomies( array( 'public' => true ), 'objects' ) ) ),
					'roles'      => array_map( static function ( $r ) {
						return translate_user_role( $r['name'] );
					}, wp_roles()->roles ),
					'menus'      => $menus,
					'welcome'    => (bool) get_user_meta( get_current_user_id(), 'akram_onboarded', true ) ? false : true,
				)
			) . ';',
			'before'
		);
		if ( isset( $_GET['welcome'], $_GET['_wpnonce'] ) && wp_verify_nonce( sanitize_text_field( wp_unslash( $_GET['_wpnonce'] ) ), 'akram_welcome' ) ) {
			update_user_meta( get_current_user_id(), 'akram_onboarded', 1 );
		}
	}

	public static function new_url( $type ) {
		return add_query_arg( array(
			'action'    => 'akram_new',
			'post_type' => $type,
			'_wpnonce'  => wp_create_nonce( 'akram_new' ),
		), admin_url( 'admin.php' ) );
	}

	public static function welcome_redirect() {
		$key = 'akram_welcome_' . get_current_user_id();
		if ( get_transient( $key ) && ! wp_doing_ajax() && ! isset( $_GET['activate-multi'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only request value; it changes nothing and is sanitised.
			delete_transient( $key );
			wp_safe_redirect( add_query_arg( '_wpnonce', wp_create_nonce( 'akram_welcome' ), admin_url( 'admin.php?page=akram&welcome=1' ) ) );
			exit;
		}
	}

	/** Create a new draft and open it in the builder. */
	public static function new_post() {
		check_admin_referer( 'akram_new' );
		$type = isset( $_GET['post_type'] ) ? sanitize_key( $_GET['post_type'] ) : 'page';
		if ( ! post_type_exists( $type ) || ! current_user_can( get_post_type_object( $type )->cap->edit_posts ) || ! Plugin::can_build() ) {
			wp_die( esc_html__( 'Not allowed.', 'akram' ), 403 );
		}
		$id = wp_insert_post( array(
			'post_type'   => $type,
			'post_status' => 'draft',
			'post_title'  => __( 'Untitled', 'akram' ),
		) );
		update_post_meta( $id, '_akram_mode', 'builder' );
		if ( 'page' === $type ) {
			update_post_meta( $id, '_wp_page_template', Options::get( 'default_template', 'akram-full' ) );
		}
		wp_safe_redirect( Editor::edit_url( $id ) );
		exit;
	}

	public static function row_action( $actions, $post ) {
		if ( in_array( $post->post_type, Options::enabled_post_types(), true ) && Plugin::can_build( $post->ID ) && 'trash' !== $post->post_status ) {
			$actions = array( 'akram' => '<a href="' . esc_url( Editor::edit_url( $post->ID ) ) . '" style="font-weight:600">' . esc_html__( 'Edit with Akram', 'akram' ) . '</a>' ) + $actions;
		}
		return $actions;
	}

	public static function post_state( $states, $post ) {
		if ( Document::is_built( $post->ID ) && 'akram_template' !== $post->post_type ) {
			$states['akram'] = trim( (string) Options::get( 'brand_name', '' ) ) ?: 'Akram';
		}
		return $states;
	}

	/** "Add New with Akram" next to "Add New" on post list screens. */
	public static function list_button( $hook ) {
		$screen = get_current_screen();
		if ( 'edit.php' !== $hook || ! $screen || ! in_array( $screen->post_type, Options::enabled_post_types(), true ) || ! Plugin::can_build() || 'akram_template' === $screen->post_type ) {
			return;
		}
		$data = array(
			'url'   => self::new_url( $screen->post_type ),
			'label' => __( 'Add New with Akram', 'akram' ),
		);
		wp_enqueue_script( 'akram-list', AKRAM_URL . 'assets/js/list-button.js', array(), AKRAM_VERSION, true );
		wp_add_inline_script( 'akram-list', 'window.akramList=' . wp_json_encode( $data ) . ';', 'before' );
	}

	public static function classic_button( $post ) {
		if ( ! in_array( $post->post_type, Options::enabled_post_types(), true ) || ! Plugin::can_build( $post->ID ) ) {
			return;
		}
		echo '<p style="margin:14px 0"><a class="button button-primary button-hero" style="background:#0e7490;border:0;color:#ffffff" href="'
			. esc_url( Editor::edit_url( $post->ID ) ) . '">' . esc_html__( 'Edit with Akram', 'akram' )
			. '</a></p>';
	}

	public static function block_editor() {
		global $post;
		if ( ! $post || ! in_array( $post->post_type, Options::enabled_post_types(), true ) || ! Plugin::can_build( $post->ID ) ) {
			return;
		}
		$data = array(
			'url'   => Editor::edit_url( $post->ID ),
			'built' => Document::is_built( $post->ID ),
			'label' => __( 'Edit with Akram', 'akram' ),
			'note'  => __( 'This page is designed with Akram. Edits made here to the content will be replaced the next time it is saved in Akram.', 'akram' ),
		);
		wp_enqueue_script( 'akram-gutenberg', AKRAM_URL . 'assets/js/block-editor.js', array( 'wp-data', 'wp-dom-ready', 'wp-notices' ), AKRAM_VERSION, true );
		wp_add_inline_script( 'akram-gutenberg', 'window.akramBlockEditor=' . wp_json_encode( $data ) . ';', 'before' );
	}

	public static function menu_field( $item_id, $item ) {
		$val  = (int) get_post_meta( $item_id, '_akram_mega', true );
		$tpls = get_posts( array(
			'post_type'      => 'akram_template',
			'posts_per_page' => 100,
			'meta_query'     => array( // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query -- bounded query on a builder meta key.
				array(
					'key'     => '_akram_type',
					'value'   => array( 'mega', 'section', 'component' ),
					'compare' => 'IN',
				),
			),
		) );
		wp_nonce_field( 'akram_mega', 'akram_mega_nonce' );
		echo '<p class="field-akram-mega description description-wide"><label>'
			. esc_html__( 'Akram mega menu (top-level items)', 'akram' )
			. '<br><select name="akram_mega[' . (int) $item_id
			. ']" class="widefat"><option value="0">' . esc_html__( '— None —', 'akram' ) . '</option>';
		foreach ( $tpls as $t ) {
			echo '<option value="' . (int) $t->ID . '"' . selected( $val, $t->ID, false ) . '>' . esc_html( $t->post_title ) . '</option>';
		}
		echo '</select></label></p>';
	}

	public static function menu_save( $menu_id, $item_id ) {
		if ( ! isset( $_POST['akram_mega_nonce'] ) || ! wp_verify_nonce( sanitize_text_field( wp_unslash( $_POST['akram_mega_nonce'] ) ), 'akram_mega' ) ) {
			return;
		}
		$v = isset( $_POST['akram_mega'][ $item_id ] ) ? absint( $_POST['akram_mega'][ $item_id ] ) : 0;
		$v ? update_post_meta( $item_id, '_akram_mega', $v ) : delete_post_meta( $item_id, '_akram_mega' );
	}

	public static function plugin_links( $links ) {
		array_unshift( $links, '<a href="' . esc_url( admin_url( 'admin.php?page=akram' ) ) . '">' . esc_html__( 'Dashboard', 'akram' ) . '</a>', '<a href="' . esc_url( admin_url( 'admin.php?page=akram-settings' ) ) . '">' . esc_html__( 'Settings', 'akram' ) . '</a>' );
		return $links;
	}

	public static function notices() {
		if ( get_option( 'akram_needs_rebuild' ) && Plugin::can_manage() && ! isset( self::PAGES[ sanitize_key( $_GET['page'] ?? '' ) ] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only request value; it changes nothing and is sanitised.
			echo '<div class="notice notice-info"><p><b>Akram:</b> '
				. esc_html__( 'Pages can be rebuilt with the latest rendering engine and breakpoints.', 'akram' )
				. ' <a class="button button-primary" href="'
				. esc_url( admin_url( 'admin.php?page=akram-tools' ) ) . '">'
				. esc_html__( 'Rebuild now', 'akram' ) . '</a></p></div>';
		}
		if ( ! Document::ensure_upload_dir() && Plugin::can_manage() ) {
			echo '<div class="notice notice-warning"><p><b>Akram:</b> '
				. esc_html__( 'The uploads folder is not writable, so CSS is printed inline. Pages still work, but caching is less efficient.', 'akram' )
				. '</p></div>';
		}
	}
}