<?php
namespace WooNooW\Frontend;

/**
 * Frontend Assets Manager
 * Handles loading of customer-spa assets
 */
class Assets {
    
    /**
     * Initialize
     */
    public static function init() {
        add_action('wp_enqueue_scripts', [self::class, 'enqueue_assets'], 20);
        add_action('wp_head', [self::class, 'add_inline_config'], 5);
        add_action('wp_enqueue_scripts', [self::class, 'dequeue_conflicting_scripts'], 100);
        add_filter('script_loader_tag', [self::class, 'add_module_type'], 10, 3);
    }
    
    /**
     * Add type="module" to customer-spa scripts
     */
    public static function add_module_type($tag, $handle, $src) {
        // Add type="module" to our Vite scripts
        if (strpos($handle, 'woonoow-customer') !== false) {
            $tag = str_replace('<script ', '<script type="module" ', $tag);
        }
        return $tag;
    }
    
    /**
     * Enqueue customer-spa assets
     */
    public static function enqueue_assets() {
        // Only load on pages with WooNooW shortcodes or in full SPA mode
        if (!self::should_load_assets()) {
            return;
        }
        
        // Check if dev mode is enabled
        $is_dev = defined('WOONOOW_CUSTOMER_DEV') && WOONOOW_CUSTOMER_DEV;
        
        if ($is_dev) {
            // Dev mode: Load from Vite dev server
            $dev_server = 'https://woonoow.local:5174';
            
            // Vite client for HMR
            wp_enqueue_script(
                'woonoow-customer-vite',
                $dev_server . '/@vite/client',
                [],
                null,
                false // Load in header
            );
            
            // Main entry point
            wp_enqueue_script(
                'woonoow-customer-spa',
                $dev_server . '/src/main.tsx',
                ['woonoow-customer-vite'],
                null,
                false // Load in header
            );
            
            error_log('WooNooW Customer: Loading from Vite dev server at ' . $dev_server);
            error_log('WooNooW Customer: Scripts enqueued - vite client and main.tsx');
        } else {
            // Production mode: Load from build
            $plugin_url = plugin_dir_url(dirname(dirname(__FILE__)));
            $dist_path  = plugin_dir_path(dirname(dirname(__FILE__))) . 'customer-spa/dist/';
            
            // Check if build exists
            if (!file_exists($dist_path)) {
                error_log('WooNooW: customer-spa build not found. Run: cd customer-spa && npm run build');
                return;
            }
            
            // Load manifest to get hashed filenames
            $manifest_file = $dist_path . 'manifest.json';
            if (file_exists($manifest_file)) {
                $manifest = json_decode(file_get_contents($manifest_file), true);
                
                // Enqueue main JS
                if (isset($manifest['src/main.tsx'])) {
                    $main_js = $manifest['src/main.tsx']['file'];
                    wp_enqueue_script(
                        'woonoow-customer-spa',
                        $plugin_url . 'customer-spa/dist/' . $main_js,
                        [],
                        null,
                        true
                    );
                }
                
                // Enqueue main CSS
                if (isset($manifest['src/main.tsx']['css'])) {
                    foreach ($manifest['src/main.tsx']['css'] as $css_file) {
                        wp_enqueue_style(
                            'woonoow-customer-spa',
                            $plugin_url . 'customer-spa/dist/' . $css_file,
                            [],
                            null
                        );
                    }
                }
            } else {
                // Fallback for production build without manifest
                wp_enqueue_script(
                    'woonoow-customer-spa',
                    $plugin_url . 'customer-spa/dist/app.js',
                    [],
                    null,
                    true
                );
                
                wp_enqueue_style(
                    'woonoow-customer-spa',
                    $plugin_url . 'customer-spa/dist/app.css',
                    [],
                    null
                );
            }
        }
    }
    
    /**
     * Add inline config and scripts to page head
     */
    public static function add_inline_config() {
        if (!self::should_load_assets()) {
            return;
        }
        
        // Get Customer SPA settings
        $spa_settings = get_option('woonoow_customer_spa_settings', []);
        $default_settings = [
            'mode' => 'disabled',
            'layout' => 'modern',
            'colors' => [
                'primary' => '#3B82F6',
                'secondary' => '#8B5CF6',
                'accent' => '#10B981',
            ],
            'typography' => [
                'preset' => 'professional',
            ],
        ];
        $theme_settings = array_replace_recursive($default_settings, $spa_settings);
        
        // Get WooCommerce currency settings
        $currency_settings = [
            'code' => get_woocommerce_currency(),
            'symbol' => get_woocommerce_currency_symbol(),
            'position' => get_option('woocommerce_currency_pos', 'left'),
            'thousandSeparator' => wc_get_price_thousand_separator(),
            'decimalSeparator' => wc_get_price_decimal_separator(),
            'decimals' => wc_get_price_decimals(),
        ];
        
        $config = [
            'apiUrl' => rest_url('woonoow/v1'),
            'nonce'  => wp_create_nonce('wp_rest'),
            'siteUrl' => get_site_url(),
            'siteTitle' => get_bloginfo('name'),
            'user'   => [
                'isLoggedIn' => is_user_logged_in(),
                'id'         => get_current_user_id(),
            ],
            'theme' => $theme_settings,
            'currency' => $currency_settings,
        ];
        
        ?>
        <script type="text/javascript">
            window.woonoowCustomer = <?php echo wp_json_encode($config); ?>;
        </script>
        <?php
        
        // If dev mode, output scripts directly
        $is_dev = defined('WOONOOW_CUSTOMER_DEV') && WOONOOW_CUSTOMER_DEV;
        if ($is_dev) {
            $dev_server = 'https://woonoow.local:5174';
            ?>
            <script type="module">
                import RefreshRuntime from '<?php echo $dev_server; ?>/@react-refresh'
                RefreshRuntime.injectIntoGlobalHook(window)
                window.$RefreshReg$ = () => {}
                window.$RefreshSig$ = () => (type) => type
                window.__vite_plugin_react_preamble_installed__ = true
            </script>
            <script type="module" crossorigin src="<?php echo $dev_server; ?>/@vite/client"></script>
            <script type="module" crossorigin src="<?php echo $dev_server; ?>/src/main.tsx"></script>
            <?php
            error_log('WooNooW Customer: Scripts output directly in head with React Refresh preamble');
        }
    }
    
    /**
     * Check if we should load customer-spa assets
     */
    private static function should_load_assets() {
        global $post;
        
        // Get Customer SPA settings
        $spa_settings = get_option('woonoow_customer_spa_settings', []);
        $mode = isset($spa_settings['mode']) ? $spa_settings['mode'] : 'disabled';
        
        // If disabled, don't load
        if ($mode === 'disabled') {
            // Still check for shortcodes
            if ($post && has_shortcode($post->post_content, 'woonoow_shop')) {
                return true;
            }
            if ($post && has_shortcode($post->post_content, 'woonoow_cart')) {
                return true;
            }
            if ($post && has_shortcode($post->post_content, 'woonoow_checkout')) {
                return true;
            }
            return false;
        }
        
        // Full SPA mode - load on all WooCommerce pages
        if ($mode === 'full') {
            if (function_exists('is_shop') && is_shop()) {
                return true;
            }
            if (function_exists('is_product') && is_product()) {
                return true;
            }
            if (function_exists('is_cart') && is_cart()) {
                return true;
            }
            if (function_exists('is_checkout') && is_checkout()) {
                return true;
            }
            if (function_exists('is_account_page') && is_account_page()) {
                return true;
            }
            return false;
        }
        
        // Checkout-Only mode - load only on specific pages
        if ($mode === 'checkout_only') {
            $checkout_pages = isset($spa_settings['checkoutPages']) ? $spa_settings['checkoutPages'] : [];
            
            if (!empty($checkout_pages['checkout']) && function_exists('is_checkout') && is_checkout() && !is_order_received_page()) {
                return true;
            }
            if (!empty($checkout_pages['thankyou']) && function_exists('is_order_received_page') && is_order_received_page()) {
                return true;
            }
            if (!empty($checkout_pages['account']) && function_exists('is_account_page') && is_account_page()) {
                return true;
            }
            if (!empty($checkout_pages['cart']) && function_exists('is_cart') && is_cart()) {
                return true;
            }
            return false;
        }
        
        // Check if current page has WooNooW shortcodes
        if ($post && has_shortcode($post->post_content, 'woonoow_shop')) {
            return true;
        }
        if ($post && has_shortcode($post->post_content, 'woonoow_cart')) {
            return true;
        }
        if ($post && has_shortcode($post->post_content, 'woonoow_checkout')) {
            return true;
        }
        if ($post && has_shortcode($post->post_content, 'woonoow_account')) {
            return true;
        }
        
        return false;
    }
    
    /**
     * Dequeue conflicting scripts when SPA is active
     */
    public static function dequeue_conflicting_scripts() {
        if (!self::should_load_assets()) {
            return;
        }
        
        // Dequeue WooCommerce scripts that conflict with SPA
        wp_dequeue_script('wc-cart-fragments');
        wp_dequeue_script('woocommerce');
        wp_dequeue_script('wc-add-to-cart');
        wp_dequeue_script('wc-add-to-cart-variation');
        
        // Dequeue WordPress block scripts that cause errors in SPA
        wp_dequeue_script('wp-block-library');
        wp_dequeue_script('wp-block-navigation');
        wp_dequeue_script('wp-interactivity');
        wp_dequeue_script('wp-interactivity-router');
        
        // Keep only essential WooCommerce styles, dequeue others if needed
        // wp_dequeue_style('woocommerce-general');
        // wp_dequeue_style('woocommerce-layout');
        // wp_dequeue_style('woocommerce-smallscreen');
    }
}