<?php
/**
 * The MarkitMall admin screen: a top-level "MarkitMall" menu with the
 * MarkitMall logo, and one page with tabs —
 *
 *   Dashboard   stats, wallet, the set-up list and the latest orders
 *   Catalog     MarkitMall's dropship catalog, to import from
 *   My imports  the products imported into this store
 *   Orders      orders with MarkitMall products and where each one is
 *   Settings    the connection (one API key field) and preferences
 *
 * Each tab is drawn by the class that owns it; this class draws the frame
 * (header, tabs, notices) and loads the stylesheet on this page only.
 */

defined( 'ABSPATH' ) || exit;

class MarkitMall_DS_Admin {

	const PAGE = 'markitmall-dropship';

	public static function init() {
		add_action( 'admin_menu', array( __CLASS__, 'menu' ), 60 );
		add_action( 'admin_enqueue_scripts', array( __CLASS__, 'assets' ) );
		add_action( 'admin_init', array( __CLASS__, 'old_catalog_url' ) );
		add_filter( 'submenu_file', array( __CLASS__, 'submenu_highlight' ) );
	}

	/** The tabs, in order: slug => label. */
	public static function tabs() {
		return array(
			'dashboard' => __( 'Dashboard', 'markitmall-dropship' ),
			'catalog'   => __( 'Catalog', 'markitmall-dropship' ),
			'imports'   => __( 'My imports', 'markitmall-dropship' ),
			'orders'    => __( 'Orders', 'markitmall-dropship' ),
			'settings'  => __( 'Settings', 'markitmall-dropship' ),
		);
	}

	/** Link to a tab, with extra query args. */
	public static function url( $tab = 'dashboard', $args = array() ) {
		return add_query_arg( array_merge( array( 'page' => self::PAGE, 'tab' => $tab ), $args ), admin_url( 'admin.php' ) );
	}

	/** Redirect back to a tab with a notice code (see notices()). */
	public static function redirect( $tab, $notice = '', $args = array() ) {
		if ( $notice ) {
			$args['mm_notice'] = $notice;
		}
		wp_safe_redirect( self::url( $tab, $args ) );
		exit;
	}

	public static function menu() {
		add_menu_page(
			__( 'MarkitMall Dropship', 'markitmall-dropship' ),
			__( 'MarkitMall', 'markitmall-dropship' ),
			'manage_woocommerce',
			self::PAGE,
			array( __CLASS__, 'render' ),
			MARKITMALL_DS_URL . 'assets/icon.png',
			56
		);
		// Sub-items that open the tabs, so each is one click from the menu. A
		// sub-item without a page of its own links to its slug as given, so the
		// slug is the tab's full admin URL.
		foreach ( self::tabs() as $tab => $label ) {
			add_submenu_page( self::PAGE, $label, $label, 'manage_woocommerce', self::submenu_slug( $tab ), 'dashboard' === $tab ? array( __CLASS__, 'render' ) : '' );
		}
	}

	private static function submenu_slug( $tab ) {
		return 'dashboard' === $tab ? self::PAGE : 'admin.php?page=' . self::PAGE . '&tab=' . $tab;
	}

	/** Version 1.0 had the catalog on its own page; send its bookmarks to the tab. */
	public static function old_catalog_url() {
		if ( isset( $_GET['page'] ) && 'markitmall-dropship-catalog' === $_GET['page'] ) { // phpcs:ignore WordPress.Security.NonceVerification
			wp_safe_redirect( self::url( 'catalog' ) );
			exit;
		}
	}

	public static function current_tab() {
		$tab = isset( $_GET['tab'] ) ? sanitize_key( wp_unslash( $_GET['tab'] ) ) : 'dashboard'; // phpcs:ignore WordPress.Security.NonceVerification
		return isset( self::tabs()[ $tab ] ) ? $tab : 'dashboard';
	}

	/**
	 * The admin screens a MarkitMall notice may appear on (Guideline 11: no
	 * notices across the whole dashboard): this plugin's screen, plus the
	 * WooCommerce screens the notice is about — "orders" or "products".
	 */
	public static function is_notice_screen( $about ) {
		if ( self::is_our_page() ) {
			return true;
		}
		$screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null;
		if ( ! $screen ) {
			return false;
		}
		$ids = 'orders' === $about
			? array( 'edit-shop_order', 'shop_order', 'woocommerce_page_wc-orders' )
			: array( 'edit-product' );
		return in_array( $screen->id, $ids, true );
	}

	public static function is_our_page() {
		return isset( $_GET['page'] ) && self::PAGE === $_GET['page']; // phpcs:ignore WordPress.Security.NonceVerification
	}

	public static function assets() {
		// The menu icon is a photo-like PNG: size it like WordPress's own icons, on every admin page.
		wp_add_inline_style( 'admin-menu', '#adminmenu .toplevel_page_markitmall-dropship .wp-menu-image img{width:20px;height:20px;padding:7px 0 0;opacity:1}' );
		if ( ! self::is_our_page() ) {
			return;
		}
		wp_enqueue_style( 'markitmall-dropship-admin', MARKITMALL_DS_URL . 'assets/admin.css', array(), MARKITMALL_DS_VERSION );
	}

	/** Highlights the menu sub-item of the open tab. */
	public static function submenu_highlight( $submenu_file ) {
		if ( ! self::is_our_page() ) {
			return $submenu_file;
		}
		return self::submenu_slug( self::current_tab() );
	}

	public static function render() {
		if ( ! current_user_can( 'manage_woocommerce' ) ) {
			return;
		}
		$tab       = self::current_tab();
		$connected = MarkitMall_DS_API::is_configured();
		$settings  = MarkitMall_DS_Settings::get_all();
		?>
		<div class="wrap mm-wrap">
			<h1 class="screen-reader-text"><?php esc_html_e( 'MarkitMall Dropship', 'markitmall-dropship' ); ?></h1>
			<header class="mm-header">
				<img class="mm-logo" src="<?php echo esc_url( MARKITMALL_DS_URL . 'assets/logo.png' ); ?>" alt="MarkitMall" width="180" height="49" />
				<div class="mm-header-text">
					<?php if ( $connected ) : ?>
						<p class="mm-header-title">
							<?php echo esc_html( $settings['brand_name'] ? sprintf( /* translators: %s: brand */ __( 'Connected as %s', 'markitmall-dropship' ), $settings['brand_name'] ) : __( 'Connected', 'markitmall-dropship' ) ); ?>
							<?php if ( 'test' === MarkitMall_DS_API::mode() ) : ?>
								<span class="mm-pill mm-pill-test"><?php esc_html_e( 'Sandbox', 'markitmall-dropship' ); ?></span>
							<?php else : ?>
								<span class="mm-pill mm-pill-live"><?php esc_html_e( 'Live', 'markitmall-dropship' ); ?></span>
							<?php endif; ?>
						</p>
						<p class="mm-header-sub"><?php esc_html_e( 'Wholesale prices · we pack and ship under your brand · tracking comes back here', 'markitmall-dropship' ); ?></p>
					<?php else : ?>
						<p class="mm-header-title"><?php esc_html_e( 'Sell MarkitMall products on this store', 'markitmall-dropship' ); ?></p>
						<p class="mm-header-sub"><?php esc_html_e( 'Wholesale prices · we pack and ship under your brand · tracking comes back here', 'markitmall-dropship' ); ?></p>
					<?php endif; ?>
				</div>
			</header>

			<?php if ( $connected ) : ?>
				<nav class="mm-tabs" aria-label="<?php esc_attr_e( 'MarkitMall sections', 'markitmall-dropship' ); ?>">
					<?php foreach ( self::tabs() as $slug => $label ) : ?>
						<a href="<?php echo esc_url( self::url( $slug ) ); ?>" class="mm-tab <?php echo $slug === $tab ? 'is-active' : ''; ?>" <?php echo $slug === $tab ? 'aria-current="page"' : ''; ?>>
							<?php echo esc_html( $label ); ?>
							<?php if ( 'imports' === $slug ) : ?>
								<span class="mm-count"><?php echo esc_html( number_format_i18n( MarkitMall_DS_Catalog::imported_count() ) ); ?></span>
							<?php elseif ( 'orders' === $slug && MarkitMall_DS_Orders::failed_order_ids( 1 ) ) : ?>
								<span class="mm-count mm-count-warn">!</span>
							<?php endif; ?>
						</a>
					<?php endforeach; ?>
				</nav>
			<?php endif; ?>

			<?php self::notices(); ?>

			<div class="mm-body">
				<?php
				if ( ! $connected ) {
					MarkitMall_DS_Settings::render_connect();
				} elseif ( 'catalog' === $tab ) {
					MarkitMall_DS_Catalog::render_catalog_tab();
				} elseif ( 'imports' === $tab ) {
					MarkitMall_DS_Catalog::render_imports_tab();
				} elseif ( 'orders' === $tab ) {
					MarkitMall_DS_Orders::render_orders_tab();
				} elseif ( 'settings' === $tab ) {
					MarkitMall_DS_Settings::render_settings_tab();
				} else {
					MarkitMall_DS_Settings::render_dashboard_tab();
				}
				?>
			</div>
		</div>
		<?php
	}

	/** The result of the last action, from ?mm_notice=. */
	private static function notices() {
		$code = isset( $_GET['mm_notice'] ) ? sanitize_key( wp_unslash( $_GET['mm_notice'] ) ) : ''; // phpcs:ignore WordPress.Security.NonceVerification
		if ( ! $code ) {
			return;
		}
		$error    = (string) get_transient( 'markitmall_ds_last_error' );
		$messages = array(
			'saved'             => array( 'success', __( 'Settings saved.', 'markitmall-dropship' ) ),
			'connected'         => array( 'success', __( 'Connected. MarkitMall will send order updates to this site.', 'markitmall-dropship' ) ),
			'connected_local'   => array( 'warning', __( 'Connected. MarkitMall cannot reach this site to send order updates (', 'markitmall-dropship' ) . $error . __( '). Everything else works; on a public site, press “Re-register webhook” under Settings → Advanced.', 'markitmall-dropship' ) ),
			'webhook_ok'        => array( 'success', __( 'Webhook registered.', 'markitmall-dropship' ) ),
			'webhook_failed'    => array( 'error', __( 'The webhook could not be registered: ', 'markitmall-dropship' ) . $error ),
			'test_ok'           => array( 'success', __( 'Connection works.', 'markitmall-dropship' ) ),
			'test_failed'       => array( 'error', __( 'Could not connect: ', 'markitmall-dropship' ) . $error ),
			'bad_key'           => array( 'error', __( 'Paste the whole key exactly as your MarkitMall dashboard shows it: Bearer mk_…:sk_…', 'markitmall-dropship' ) ),
			'wrong_integration' => array( 'error', __( 'This key belongs to another kind of store connection. In your MarkitMall dashboard → Integrations, connect a WooCommerce store and create a key for it.', 'markitmall-dropship' ) ),
			'disconnected'      => array( 'success', __( 'Disconnected from MarkitMall. Your imported products stay in your store.', 'markitmall-dropship' ) ),
			'retried'           => array( 'info', __( 'Sent — the order’s notes show the result.', 'markitmall-dropship' ) ),
			'delivery_ok'       => array( 'success', __( 'Delivery rates set up: MarkitMall delivery is on in your Pakistan shipping zone.', 'markitmall-dropship' ) ),
			'delivery_already'  => array( 'info', __( 'Delivery rates are already set up.', 'markitmall-dropship' ) ),
			'delivery_failed'   => array( 'error', __( 'Delivery rates could not be set up: ', 'markitmall-dropship' ) . $error ),
			'imported'          => array( 'success', __( 'Imported — it is in your Products. Stock and price updates arrive automatically.', 'markitmall-dropship' ) ),
			'relinked'          => array( 'success', __( 'Re-linked with MarkitMall.', 'markitmall-dropship' ) ),
			'removed'           => array( 'success', __( 'Removed from your store. You can import it again any time.', 'markitmall-dropship' ) ),
			'import_failed'     => array( 'error', $error ),
		);
		if ( ! isset( $messages[ $code ] ) ) {
			return;
		}
		echo '<div class="mm-notice mm-notice-' . esc_attr( $messages[ $code ][0] ) . '"><p>' . esc_html( $messages[ $code ][1] ) . '</p></div>';
	}

	// ── Small building blocks shared by the tabs ──────────────────────────────

	public static function stat( $label, $value, $hint = '' ) {
		echo '<div class="mm-stat"><p class="mm-stat-label">' . esc_html( $label ) . '</p><p class="mm-stat-value">' . esc_html( $value ) . '</p>';
		if ( $hint ) {
			echo '<p class="mm-stat-hint">' . esc_html( $hint ) . '</p>';
		}
		echo '</div>';
	}

	/** A coloured status label: tone is good, warn, bad, brand or plain. */
	public static function badge( $label, $tone = 'plain' ) {
		return '<span class="mm-badge mm-badge-' . esc_attr( $tone ) . '">' . esc_html( $label ) . '</span>';
	}

	public static function rs( $amount ) {
		return 'Rs ' . number_format_i18n( (float) $amount );
	}

	/** Disables a form's button while it submits, so one click cannot send it twice. */
	public static function busy_js( $label ) {
		return "var b=this.querySelector('button[type=submit],button:not([type])');if(b){if(b.disabled){return false;}b.disabled=true;b.textContent='" . esc_js( $label ) . "';}";
	}

	/** An admin-post.php form button: action, nonce, hidden fields, one button. */
	public static function action_button( $action, $label, $fields = array(), $class = 'mm-btn', $confirm = '', $busy = '' ) {
		$onsubmit = '';
		if ( $confirm ) {
			$onsubmit .= "if(!confirm('" . esc_js( $confirm ) . "')){return false;}";
		}
		if ( $busy ) {
			$onsubmit .= self::busy_js( $busy );
		}
		echo '<form method="post" action="' . esc_url( admin_url( 'admin-post.php' ) ) . '" class="mm-inline-form"' . ( $onsubmit ? ' onsubmit="' . esc_attr( $onsubmit ) . '"' : '' ) . '>';
		echo '<input type="hidden" name="action" value="' . esc_attr( $action ) . '" />';
		wp_nonce_field( $action );
		foreach ( $fields as $name => $value ) {
			echo '<input type="hidden" name="' . esc_attr( $name ) . '" value="' . esc_attr( (string) $value ) . '" />';
		}
		echo '<button type="submit" class="' . esc_attr( $class ) . '">' . esc_html( $label ) . '</button></form>';
	}
}