<?php
/**
 * Admin menu and page rendering.
 *
 * @package APSW
 */

defined( 'ABSPATH' ) || exit;

/**
 * Handles admin menu pages.
 */
class APSW_Admin_Menu {

	/**
	 * Dependencies service.
	 *
	 * @var APSW_Dependencies
	 */
	private $dependencies;

	/**
	 * Settings service.
	 *
	 * @var APSW_Settings
	 */
	private $settings;

	/**
	 * Product draft input service.
	 *
	 * @var APSW_Product_Draft_Input
	 */
	private $product_draft_input;

	/**
	 * Batch Create service.
	 *
	 * @var APSW_Batch_Create
	 */
	private $batch_create;

	/**
	 * Constructor.
	 *
	 * @param APSW_Dependencies        $dependencies         Dependency service instance.
	 * @param APSW_Settings            $settings             Settings service instance.
	 * @param APSW_Product_Draft_Input $product_draft_input  Product draft input service instance.
	 * @param APSW_Batch_Create        $batch_create         Batch Create service instance.
	 */
	public function __construct( APSW_Dependencies $dependencies, APSW_Settings $settings, APSW_Product_Draft_Input $product_draft_input, APSW_Batch_Create $batch_create ) {
		$this->dependencies        = $dependencies;
		$this->settings            = $settings;
		$this->product_draft_input = $product_draft_input;
		$this->batch_create        = $batch_create;
	}

	/**
	 * Initialize admin hooks.
	 *
	 * @return void
	 */
	public function init() {
		add_action( 'admin_menu', array( $this, 'register_menu' ) );
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_assets' ) );
		add_action( 'admin_head', array( $this, 'print_sign_in_menu_styles' ) );
	}

	/**
	 * Register admin pages.
	 *
	 * @return void
	 */
	public function register_menu() {
		add_menu_page(
			__( 'AI Product Studio', 'ai-product-studio-for-woocommerce' ),
			__( 'AI Product Studio', 'ai-product-studio-for-woocommerce' ),
			'manage_options',
			'apsw-dashboard',
			array( $this, 'render_dashboard_page' ),
			'dashicons-welcome-add-page',
			56
		);

		add_submenu_page(
			'apsw-dashboard',
			__( 'Dashboard', 'ai-product-studio-for-woocommerce' ),
			__( 'Dashboard', 'ai-product-studio-for-woocommerce' ),
			'manage_options',
			'apsw-dashboard',
			array( $this, 'render_dashboard_page' )
		);

		add_submenu_page(
			'apsw-dashboard',
			__( 'Create Product', 'ai-product-studio-for-woocommerce' ),
			__( 'Create Product', 'ai-product-studio-for-woocommerce' ),
			'manage_options',
			'apsw-create-product',
			array( $this, 'render_create_product_page' )
		);

		$this->add_create_product_workflow_submenu(
			__( 'Text to Product', 'ai-product-studio-for-woocommerce' ),
			'apsw-create-product-text'
		);

		$this->add_create_product_workflow_submenu(
			__( 'Image to Product', 'ai-product-studio-for-woocommerce' ),
			'apsw-create-product-image'
		);

		$this->add_create_product_workflow_submenu(
			__( 'Advanced Product', 'ai-product-studio-for-woocommerce' ),
			'apsw-create-product-advanced'
		);

		$this->add_create_product_workflow_submenu(
			__( 'Bulk Image to Product', 'ai-product-studio-for-woocommerce' ),
			'apsw-create-product-bulk-image'
		);

		add_submenu_page(
			'apsw-dashboard',
			__( 'Batch Create', 'ai-product-studio-for-woocommerce' ),
			__( 'Batch Create', 'ai-product-studio-for-woocommerce' ),
			'manage_options',
			'apsw-batch-create',
			array( $this, 'render_batch_create_page' )
		);

		add_submenu_page(
			'apsw-dashboard',
			__( 'Settings', 'ai-product-studio-for-woocommerce' ),
			__( 'Settings', 'ai-product-studio-for-woocommerce' ),
			'manage_options',
			'apsw-settings',
			array( $this, 'render_settings_page' )
		);

		if ( ! $this->is_clugins_connected() ) {
			add_submenu_page(
				'apsw-dashboard',
				__( 'Sign in', 'ai-product-studio-for-woocommerce' ),
				__( 'Sign in', 'ai-product-studio-for-woocommerce' ),
				'manage_options',
				'apsw-connect',
				array( $this, 'render_settings_page' )
			);
		}
	}

	/**
	 * Add a workflow link that routes to the existing Create Product page.
	 *
	 * @param string $label Workflow label.
	 * @param string $slug  Registered submenu slug.
	 * @return void
	 */
	private function add_create_product_workflow_submenu( $label, $slug ) {
		add_submenu_page(
			'apsw-dashboard',
			$label,
			$label,
			'manage_options',
			sanitize_key( $slug ),
			array( $this, 'render_create_product_page' )
		);
	}

	/**
	 * Load admin styles for plugin pages.
	 *
	 * @param string $hook Current admin hook.
	 * @return void
	 */
	public function enqueue_assets( $hook ) {
		$apsw_hook_pages = array(
			'toplevel_page_apsw-dashboard'                 => 'apsw-dashboard',
			'ai-product-studio_page_apsw-dashboard'        => 'apsw-dashboard',
			'ai-product-studio_page_apsw-create-product'   => 'apsw-create-product',
			'ai-product-studio_page_apsw-create-product-text' => 'apsw-create-product',
			'ai-product-studio_page_apsw-create-product-image' => 'apsw-create-product',
			'ai-product-studio_page_apsw-create-product-advanced' => 'apsw-create-product',
			'ai-product-studio_page_apsw-create-product-bulk-image' => 'apsw-create-product',
			'ai-product-studio_page_apsw-batch-create'     => 'apsw-batch-create',
			'ai-product-studio_page_apsw-settings'         => 'apsw-settings',
			'ai-product-studio_page_apsw-connect'          => 'apsw-settings',
		);
		$current_page    = isset( $apsw_hook_pages[ $hook ] ) ? $apsw_hook_pages[ $hook ] : '';

		if ( '' === $current_page ) {
			return;
		}

		$css_file = APSW_PLUGIN_DIR . 'assets/css/admin.css';
		$js_file  = APSW_PLUGIN_DIR . 'assets/js/admin.js';

		wp_enqueue_style(
			'apsw-admin',
			APSW_PLUGIN_URL . 'assets/css/admin.css',
			array(),
			file_exists( $css_file ) ? filemtime( $css_file ) : APSW_VERSION
		);

		if ( in_array( $current_page, array( 'apsw-create-product', 'apsw-batch-create' ), true ) ) {
			wp_enqueue_media();
		}

		wp_enqueue_script(
			'apsw-admin',
			APSW_PLUGIN_URL . 'assets/js/admin.js',
			array( 'jquery' ),
			file_exists( $js_file ) ? filemtime( $js_file ) : APSW_VERSION,
			true
		);

		wp_localize_script(
			'apsw-admin',
			'apswAdmin',
			array(
				'mediaTitle'  => __( 'Select Images', 'ai-product-studio-for-woocommerce' ),
				'mediaButton' => __( 'Use images', 'ai-product-studio-for-woocommerce' ),
				'strings'     => array(
					'mediaLibraryUnavailable'              => __( 'WordPress Media Library is not available on this page.', 'ai-product-studio-for-woocommerce' ),
					'selectImages'                         => __( 'Select Images', 'ai-product-studio-for-woocommerce' ),
					'useSelectedImages'                    => __( 'Use selected images', 'ai-product-studio-for-woocommerce' ),
					'selectMainImageForAiAnalysis'         => __( 'Select Main Image for AI Analysis', 'ai-product-studio-for-woocommerce' ),
					'useImageForAiAnalysis'                => __( 'Use image for AI analysis', 'ai-product-studio-for-woocommerce' ),
					'selectImagesForAiAnalysis'            => __( 'Select Images for AI Analysis', 'ai-product-studio-for-woocommerce' ),
					'selectGalleryImagesOptional'          => __( 'Select Gallery Images (Optional)', 'ai-product-studio-for-woocommerce' ),
					'selectLocalImages'                    => __( 'Select Local Images', 'ai-product-studio-for-woocommerce' ),
					'useImagesForAiAnalysis'               => __( 'Use images for AI analysis', 'ai-product-studio-for-woocommerce' ),
					'useGalleryImages'                     => __( 'Use gallery images', 'ai-product-studio-for-woocommerce' ),
					'useLocalImages'                       => __( 'Use local images', 'ai-product-studio-for-woocommerce' ),
					'bulkImageSelectionLimitNotice'        => __( 'You can select up to 10 images. Only the first 10 selected images will be used.', 'ai-product-studio-for-woocommerce' ),
					'advancedNotesHelper'                  => __( 'Add enough product detail to guide the generated product content.', 'ai-product-studio-for-woocommerce' ),
					'basicNotesHelper'                     => __( 'Write product details. AI will organize them.', 'ai-product-studio-for-woocommerce' ),
					'bulkImageHelper'                      => __( 'Each selected image is analyzed by AI and creates one product. Images are processed one by one. You can select up to 10 images.', 'ai-product-studio-for-woocommerce' ),
					'advancedImageHelper'                  => __( 'AI analyzes the main image together with your product details. Gallery images are optional and stay local.', 'ai-product-studio-for-woocommerce' ),
					'imageModeHelper'                      => __( 'AI analyzes the main image. Gallery images are optional and stay local.', 'ai-product-studio-for-woocommerce' ),
					'localImagesHelper'                    => __( 'Selected images stay local and are not analyzed by AI.', 'ai-product-studio-for-woocommerce' ),
					'selectedImages'                       => __( 'Selected images', 'ai-product-studio-for-woocommerce' ),
					'galleryImages'                        => __( 'Gallery images', 'ai-product-studio-for-woocommerce' ),
					'localImages'                          => __( 'Local images', 'ai-product-studio-for-woocommerce' ),
					'generateProductWithAi'                => __( 'Generate Product with AI', 'ai-product-studio-for-woocommerce' ),
					'progressPreparingProductDetails'      => __( 'Preparing product details...', 'ai-product-studio-for-woocommerce' ),
					'progressSendingDetailsToCluginsManagedAi' => __( 'Sending details to Clugins Managed AI...', 'ai-product-studio-for-woocommerce' ),
					'progressWritingProductContent'        => __( 'Writing product content...', 'ai-product-studio-for-woocommerce' ),
					'progressCreatingWooProduct'           => __( 'Creating the WooCommerce product...', 'ai-product-studio-for-woocommerce' ),
					'progressSavingProductDetails'         => __( 'Saving images, pricing, and product details...', 'ai-product-studio-for-woocommerce' ),
					'progressAlmostDone'                   => __( 'Almost done...', 'ai-product-studio-for-woocommerce' ),
					'generating'                           => __( 'Generating...', 'ai-product-studio-for-woocommerce' ),
					'selectAtLeastOneImage'                => __( 'Select at least one image before generating products from images.', 'ai-product-studio-for-woocommerce' ),
					'bulkImageLimit'                       => __( 'You can select up to 10 images for Bulk Image to Product.', 'ai-product-studio-for-woocommerce' ),
					'advancedDetailsRequired'              => __( 'Add a few more product details before generating an advanced product.', 'ai-product-studio-for-woocommerce' ),
					'advancedMainImageRequired'            => __( 'Select a main product image before generating an advanced product.', 'ai-product-studio-for-woocommerce' ),
					'imageMainImageRequired'               => __( 'Select a main product image before generating from an image.', 'ai-product-studio-for-woocommerce' ),
					/* translators: {current}: current product number, {total}: total product count. */
					'batchProductsStepLabel'               => __( '2. Product {current} of {total}', 'ai-product-studio-for-woocommerce' ),
					/* translators: {current}: current product number, {total}: total product count. */
					'batchProductStepTitle'                => __( 'Product {current} of {total}', 'ai-product-studio-for-woocommerce' ),
					'batchProductStepCopy'                 => __( 'Product details are sent to AI. Selected images stay local and are attached after creation.', 'ai-product-studio-for-woocommerce' ),
					'productBriefsStepLabel'               => __( '2. Product briefs', 'ai-product-studio-for-woocommerce' ),
					'textToProduct'                        => __( 'Text to Product', 'ai-product-studio-for-woocommerce' ),
					'addBatchItemDetails'                  => __( 'Add product details for this batch item.', 'ai-product-studio-for-woocommerce' ),
					'noCategorySelected'                   => __( 'No category selected', 'ai-product-studio-for-woocommerce' ),
					/* translators: {number}: product item number. */
					'productReviewTitle'                   => __( 'Product {number}', 'ai-product-studio-for-woocommerce' ),
					'localImageSelected'                   => __( 'Local image selected', 'ai-product-studio-for-woocommerce' ),
					'noLocalImageSelected'                 => __( 'No local image selected', 'ai-product-studio-for-woocommerce' ),
					'productKind'                          => __( 'Product kind', 'ai-product-studio-for-woocommerce' ),
					'virtual'                              => __( 'Virtual', 'ai-product-studio-for-woocommerce' ),
					'physical'                             => __( 'Physical', 'ai-product-studio-for-woocommerce' ),
					'category'                             => __( 'Category', 'ai-product-studio-for-woocommerce' ),
					'notSelected'                          => __( 'Not selected', 'ai-product-studio-for-woocommerce' ),
					'regularPrice'                         => __( 'Regular price', 'ai-product-studio-for-woocommerce' ),
					'notEntered'                           => __( 'Not entered', 'ai-product-studio-for-woocommerce' ),
					'salePrice'                            => __( 'Sale price', 'ai-product-studio-for-woocommerce' ),
					'stockQuantity'                        => __( 'Stock quantity', 'ai-product-studio-for-woocommerce' ),
					'selectLocalProductImage'              => __( 'Select Local Product Image', 'ai-product-studio-for-woocommerce' ),
					'useLocalProductImage'                 => __( 'Use local product image', 'ai-product-studio-for-woocommerce' ),
					'setupBatchItems'                      => __( 'Set up batch items before creating the batch.', 'ai-product-studio-for-woocommerce' ),
					'addAllBatchItemDetails'               => __( 'Add product details for every batch item.', 'ai-product-studio-for-woocommerce' ),
				),
			)
		);
	}

	/**
	 * Style the conditional Sign in submenu item.
	 *
	 * @return void
	 */
	public function print_sign_in_menu_styles() {
		if ( $this->is_clugins_connected() ) {
			return;
		}
		?>
		<style>
			#adminmenu .wp-submenu a[href*="page=apsw-connect"] {
				display: inline-flex;
				align-items: center;
				justify-content: center;
				margin: 7px 12px 7px 10px;
				padding: 6px 12px !important;
				min-height: 20px;
				border-radius: 999px;
				background: #5f42ff;
				color: #ffffff !important;
				font-weight: 700;
				line-height: 1.2;
				box-shadow: 0 8px 18px rgba(95, 66, 255, 0.26);
				transition: background 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
			}

			#adminmenu .wp-submenu li.current a[href*="page=apsw-connect"],
			#adminmenu .wp-submenu a[href*="page=apsw-connect"]:hover,
			#adminmenu .wp-submenu a[href*="page=apsw-connect"]:focus {
				background: #6f55ff;
				color: #ffffff !important;
				box-shadow: 0 10px 22px rgba(95, 66, 255, 0.34);
				transform: translateY(-1px);
			}
		</style>
		<?php
	}

	/**
	 * Render dashboard page.
	 *
	 * @return void
	 */
	public function render_dashboard_page() {
		$woocommerce_active        = $this->dependencies->is_woocommerce_active();
		$settings                  = $this->settings->get_settings();
		$selected_provider_key     = $this->settings->normalize_provider_key( $settings[ APSW_Settings::FIELD_PROVIDER ] );
		$provider_ready            = $this->is_selected_provider_configured( $settings, $selected_provider_key );
		$selected_provider_name    = $this->settings->get_provider_label( $selected_provider_key );
		include APSW_PLUGIN_DIR . 'admin/views/dashboard.php';
	}

	/**
	 * Render settings page.
	 *
	 * @return void
	 */
	public function render_settings_page() {
		$settings                 = $this->settings->get_settings();
		$selected_provider_key    = $this->settings->normalize_provider_key( $settings[ APSW_Settings::FIELD_PROVIDER ] );
		$selected_provider_name   = $this->settings->get_provider_label( $selected_provider_key );
		$description_length_options = $this->settings->get_description_length_options();
		$generation_option_fields   = $this->settings->get_generation_option_fields();
		include APSW_PLUGIN_DIR . 'admin/views/settings.php';
	}

	/**
	 * Render Create Product Draft page.
	 *
	 * @return void
	 */
	public function render_create_product_page() {
		$contexts           = $this->product_draft_input->get_allowed_contexts();
		$status_options     = $this->product_draft_input->get_status_options();
		$product_categories = $this->get_product_categories();
		$last_prepared_data = $this->product_draft_input->get_last_prepared_input( get_current_user_id() );
		$creation_notice    = $this->product_draft_input->consume_creation_notice( get_current_user_id() );
		$ai_creation_notice = $this->product_draft_input->consume_ai_creation_notice( get_current_user_id() );
		$ai_generation_notice = $this->product_draft_input->consume_ai_generation_notice( get_current_user_id() );
		$generate_create_notice = $this->product_draft_input->consume_generate_create_notice( get_current_user_id() );
		$settings           = $this->settings->get_settings();
		$selected_provider_key = $this->settings->normalize_provider_key( $settings[ APSW_Settings::FIELD_PROVIDER ] );
		$provider_ready     = $this->is_selected_provider_configured( $settings, $selected_provider_key );
		$selected_provider_name = $this->settings->get_provider_label( $selected_provider_key );
		$woocommerce_active = $this->dependencies->is_woocommerce_active();
		$show_review_prompt = $this->product_draft_input->should_show_review_prompt( get_current_user_id() );
		$review_url         = $this->product_draft_input->get_review_url();
		include APSW_PLUGIN_DIR . 'admin/views/create-product.php';
	}

	/**
	 * Render Batch Create page.
	 *
	 * @return void
	 */
	public function render_batch_create_page() {
		$product_categories    = $this->get_product_categories();
		$batch_notice          = $this->batch_create->consume_notice( get_current_user_id() );
		$batch_limit           = $this->batch_create->get_batch_limit();
		$settings              = $this->settings->get_settings();
		$selected_provider_key = $this->settings->normalize_provider_key( $settings[ APSW_Settings::FIELD_PROVIDER ] );
		$provider_ready        = $this->is_selected_provider_configured( $settings, $selected_provider_key );
		$selected_provider_name = $this->settings->get_provider_label( $selected_provider_key );
		$woocommerce_active    = $this->dependencies->is_woocommerce_active();
		include APSW_PLUGIN_DIR . 'admin/views/batch-create.php';
	}

	/**
	 * Return available WooCommerce product categories.
	 *
	 * @return WP_Term[]
	 */
	private function get_product_categories() {
		if ( ! taxonomy_exists( 'product_cat' ) ) {
			return array();
		}

		$terms = get_terms(
			array(
				'taxonomy'   => 'product_cat',
				'hide_empty' => false,
				'orderby'    => 'name',
				'order'      => 'ASC',
			)
		);

		return is_wp_error( $terms ) || ! is_array( $terms ) ? array() : $terms;
	}

	/**
	 * Check whether the selected provider has the required local credential.
	 *
	 * @param array  $settings Settings array.
	 * @param string $provider Selected provider key.
	 * @return bool
	 */
	private function is_selected_provider_configured( array $settings, $provider ) {
		if ( 'clugins_managed' === $provider ) {
			return ! empty( $settings[ APSW_Settings::FIELD_CLUGINS_ACCESS_KEY ] );
		}

		return false;
	}

	/**
	 * Check whether Clugins has a stored Access Key.
	 *
	 * @return bool
	 */
	private function is_clugins_connected() {
		$settings = $this->settings->get_settings();
		$provider = $this->settings->normalize_provider_key( $settings[ APSW_Settings::FIELD_PROVIDER ] );

		return $this->is_selected_provider_configured( $settings, $provider );
	}
}