<?php
declare( strict_types=1 );

namespace Dashbread\Core;

/**
 * wp-admin: one top-level "Dashbread" menu whose screens are a React SPA (assets/build/admin-app.js).
 * Each submenu is a real admin page slug so WordPress highlights it; the SPA reads the screen
 * from the mount node and switches screens client-side with history.pushState.
 */
final class Admin {

	/** slug suffix => [menu label, screen id]. */
	/** The Dashbread mark (assets/img/menu-icon.svg), fill-only so wp-admin can tint it for the color scheme. */
	public const MENU_ICON = 'data:image/svg+xml;base64,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';

	public function register(): void {
		add_action( 'admin_menu', array( $this, 'menu' ) );
		add_action( 'admin_init', array( $this, 'settings' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue' ) );
		add_filter( 'plugin_action_links_' . plugin_basename( DASHBREAD_FILE ), array( $this, 'links' ) );
	}

	/**
	 * Core screens plus any an add-on adds through `dashbread_admin_screens`
	 * (slug suffix => [menu label, screen id]; the add-on's bundle registers the React screen).
	 *
	 * @return array<string,array{0:string,1:string}>
	 */
	public static function screens(): array {
		$screens = array(
			''               => array( __( 'Dashboard', 'dashbread' ), 'dashboard' ),
			'-settings'      => array( __( 'Settings', 'dashbread' ), 'settings' ),
			'-hosted'        => array( __( 'Hosted pages', 'dashbread' ), 'hosted' ),
			'-notifications' => array( __( 'Notifications', 'dashbread' ), 'notifications' ),
			'-extend'        => array( __( 'Pro & Add-ons', 'dashbread' ), 'extend' ),
			'-help'          => array( __( 'Help', 'dashbread' ), 'help' ),
		);
		return (array) apply_filters( 'dashbread_admin_screens', $screens );
	}

	public function menu(): void {
		// Menu titles accept markup: a "Pro" pill when the Dashbread Pro plugin is active (same as OrgFuse).
		$brand      = Brand::name();
		$menu_title = esc_html( $brand ) . ( Features::pro_active() && Brand::pro_pill() ? ' <span class="dashbread-pro-pill">' . esc_html__( 'Pro', 'dashbread' ) . '</span>' : '' );
		add_menu_page( $brand, $menu_title, 'manage_options', 'dashbread', array( $this, 'page' ), Brand::menu_icon(), 58 );
		foreach ( self::screens() as $suffix => [ $label ] ) {
			add_submenu_page( 'dashbread', $brand . ' › ' . $label, $label, 'manage_options', 'dashbread' . $suffix, array( $this, 'page' ) );
		}
		/** Lets Pro / add-ons register more screens under the Dashbread menu (after the Core ones). */
		do_action( 'dashbread_admin_menu' );
	}

	public function links( array $links ): array {
		array_unshift( $links, '<a href="' . esc_url( admin_url( 'admin.php?page=dashbread-settings' ) ) . '">' . esc_html__( 'Settings', 'dashbread' ) . '</a>', '<a href="' . esc_url( Settings::app_url() ) . '">' . esc_html__( 'Open app', 'dashbread' ) . '</a>' );
		return $links;
	}

	public function settings(): void {
		register_setting( 'dashbread', Settings::OPTION, array( 'type' => 'array', 'sanitize_callback' => array( $this, 'sanitize' ) ) );
	}

	/** The one place settings are validated: used by options.php and by the admin REST route. @param mixed $in */
	public function sanitize( $in ): array {
		$in  = is_array( $in ) ? $in : array();
		$old = Settings::all();
		$out = array(
			'route'          => sanitize_title( (string) ( $in['route'] ?? 'app' ) ) ?: 'app',
			'site_name'      => sanitize_text_field( (string) ( $in['site_name'] ?? '' ) ),
			'logo_id'        => (int) ( $in['logo_id'] ?? 0 ),
			'primary'        => sanitize_hex_color( (string) ( $in['primary'] ?? '#4f46e5' ) ) ?: '#4f46e5',
			'mode'           => in_array( $in['mode'] ?? 'light', array( 'light', 'dark', 'auto' ), true ) ? $in['mode'] : 'light',
			'preset'         => in_array( $in['preset'] ?? 'console', array( 'console', 'comfort' ), true ) ? $in['preset'] : 'console',
			'redirect_login' => empty( $in['redirect_login'] ) ? 0 : 1,
			'land_in_app'    => empty( $in['land_in_app'] ) ? 0 : 1,
			'hide_admin_bar' => empty( $in['hide_admin_bar'] ) ? 0 : 1,
			'block_admin'    => empty( $in['block_admin'] ) ? 0 : 1,
			'legacy_login'   => empty( $in['legacy_login'] ) ? 0 : 1,
			'footer_text'    => wp_kses_post( (string) ( $in['footer_text'] ?? '' ) ),
			'powered_by'     => empty( $in['powered_by'] ) ? 0 : 1,
			'menus'          => $old['menus'],
		);
		if ( $out['route'] !== $old['route'] || $out['legacy_login'] !== $old['legacy_login'] ) {
			update_option( 'dashbread_flush_needed', 1 );
		}
		return $out;
	}

	public static function is_screen( string $hook ): bool {
		// Submenu hooks derive from the sanitized menu title, which carries the "Pro" pill when Pro is
		// active (dashbread-pro_page_dashbread-settings), so match on the page slug part only.
		return 'toplevel_page_dashbread' === $hook || str_contains( $hook, '_page_dashbread' );
	}

	public function enqueue( string $hook ): void {
		// The pill sits in the global admin menu, so its style loads on every admin screen.
		if ( Features::pro_active() ) {
			wp_register_style( 'dashbread-admin-menu', false, array(), DASHBREAD_VERSION );
			wp_enqueue_style( 'dashbread-admin-menu' );
			wp_add_inline_style( 'dashbread-admin-menu', '#adminmenu #toplevel_page_dashbread .dashbread-pro-pill{display:inline-block;margin-left:6px;padding:0 6px;font-size:9px;line-height:15px;font-weight:700;letter-spacing:.4px;text-transform:uppercase;color:#fff;background:#4f46e5;border-radius:9px;vertical-align:middle;position:relative;top:-1px}#adminmenu #toplevel_page_dashbread.wp-has-current-submenu .dashbread-pro-pill,#adminmenu #toplevel_page_dashbread:hover .dashbread-pro-pill{background:#fff;color:#4f46e5}' );
		}
		if ( ! self::is_screen( $hook ) ) {
			return;
		}
		wp_enqueue_media();
		wp_enqueue_style( 'dashbread-tokens', DASHBREAD_URL . 'assets/css/tokens.css', array(), DASHBREAD_VERSION );
		wp_enqueue_style( 'dashbread-admin', DASHBREAD_URL . 'assets/css/admin.css', array( 'dashbread-tokens' ), DASHBREAD_VERSION );
		wp_enqueue_script( 'dashbread-admin', DASHBREAD_URL . 'assets/build/admin-app.js', array( 'react', 'react-dom', 'wp-api-fetch' ), DASHBREAD_VERSION, true );
		\Dashbread\Core\I18n::script( 'dashbread-admin' );
		// Dismissing one of Dashbread's notices (data-dashbread-dismiss="key") is remembered per user.
		wp_add_inline_script( 'dashbread-admin', "document.addEventListener('click',function(e){var b=e.target.closest&&e.target.closest('.notice[data-dashbread-dismiss] .notice-dismiss');if(!b)return;window.wp.apiFetch({path:'/" . \Dashbread\Rest\Routes::NS . "/admin/dismiss',method:'POST',data:{key:b.closest('.notice').getAttribute('data-dashbread-dismiss')}}).catch(function(){});});" );
		wp_localize_script( 'dashbread-admin', 'DashbreadAdmin', array(
			'rest'     => esc_url_raw( rest_url( \Dashbread\Rest\Routes::NS . '/' ) ),
			'nonce'    => wp_create_nonce( 'wp_rest' ),
			'adminUrl' => admin_url( 'admin.php' ),
			'version'  => DASHBREAD_VERSION,
			'pro'      => Features::pro_active(),
			'icons'    => \Dashbread\Shell\Shell::js_icons() + $this->admin_icons(),
			// The full set the icon picker offers; ui.jsx fetches it the first time an icon isn't preloaded.
			'iconsJson' => DASHBREAD_URL . 'assets/icons/lucide.json',
			'screens'  => array_map( static fn( $suffix, $s ) => array( 'id' => $s[1], 'label' => $s[0], 'slug' => 'dashbread' . $suffix ), array_keys( self::screens() ), self::screens() ),
			'site'     => get_bloginfo( 'name' ),
			'email'    => wp_get_current_user()->user_email,
			'year'     => gmdate( 'Y' ),
			'brand'    => array( 'name' => Brand::name(), 'logo' => Brand::logo(), 'tagline' => Brand::tagline(), 'custom' => Brand::is_custom() ),
		) );
	}

	/** Lucide icons the admin screens' own chrome uses, preloaded; any other icon loads from lucide.json on demand. */
	private function admin_icons(): array {
		return \Dashbread\Shell\Icons::inner_map( array( 'layout-dashboard', 'settings', 'files', 'bell', 'puzzle', 'circle-help', 'users', 'user-plus', 'log-in', 'mail-open', 'check', 'x', 'external-link', 'moon', 'sun', 'search', 'plus', 'trash-2', 'lock', 'sparkles', 'triangle-alert', 'circle-check', 'circle-x', 'building-2', 'message-square', 'send', 'layout-grid', 'menu', 'image', 'rocket', 'book-open', 'life-buoy', 'trash', 'refresh-cw', 'file-text', 'eye', 'pencil', 'arrow-left-right', 'circle', 'file', 'chart-line', 'chart-column', 'chart-pie', 'flag', 'list-todo', 'chevron-down', 'shield-check', 'user-check', 'messages-square', 'key-round', 'smartphone', 'link', 'unlink', 'copy', 'gift', 'calendar', 'mouse-pointer-click', 'copy-plus' ) );
	}

	/** The SPA mount. Screen comes from the page slug. */
	public function page(): void {
		$page   = sanitize_key( (string) ( $_GET['page'] ?? 'dashbread' ) ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only: which Dashbread screen to mount; WordPress has already checked manage_options for this page.
		$suffix = substr( $page, strlen( 'dashbread' ) );
		$screen = self::screens()[ $suffix ][1] ?? 'dashboard';
		echo '<div class="wrap dashbread-wrap"><div id="dashbread-admin" data-screen="' . esc_attr( $screen ) . '"><div class="dashbread-boot">' . esc_html__( 'Loading Dashbread…', 'dashbread' ) . '</div></div></div>';
	}
}