<?php
namespace WooNooW\Admin;

use WooNooW\Compat\MenuProvider;
use WooNooW\Compat\AddonRegistry;
use WooNooW\Compat\RouteRegistry;
use WooNooW\Compat\NavigationRegistry;

class Assets
{
    public static function init()
    {
        add_action('admin_enqueue_scripts', [__CLASS__, 'enqueue']);
    }

    public static function enqueue($hook)
    {
        // Debug logging
        if (defined('WP_DEBUG') && WP_DEBUG) {
            error_log('[WooNooW Assets] Hook: ' . $hook);
        }

        if ($hook !== 'toplevel_page_woonoow') {
            return;
        }

        // Enqueue WordPress Media library for image uploads
        wp_enqueue_media();

        // Decide dev vs prod
        $is_dev = self::is_dev_mode();

        // Debug logging
        if (defined('WP_DEBUG') && WP_DEBUG) {
            error_log('[WooNooW Assets] Dev mode: ' . ($is_dev ? 'true' : 'false'));
        }

        if ($is_dev) {
            self::enqueue_dev();
        } else {
            self::enqueue_prod();
        }
    }

    /** ----------------------------------------
     *  DEV MODE (Vite dev server)
     *  -------------------------------------- */
    private static function enqueue_dev(): void
    {
        $dev_url = self::dev_server_url(); // e.g. http://localhost:5173

        // 1) Create a small handle to attach config (window.WNW_API)
        $handle = 'wnw-admin-dev-config';
        wp_register_script($handle, '', [], null, true);
        wp_enqueue_script($handle);

        // Attach runtime config (before module loader runs)
        // If you prefer, keep using self::localize_runtime($handle)
        wp_localize_script($handle, 'WNW_API', [
            'root' => untrailingslashit(esc_url_raw(rest_url('woonoow/v1'))),
            'nonce' => wp_create_nonce('wp_rest'),
            'isDev' => true,
            'devServer' => $dev_url,
            'adminScreen' => 'woonoow',
            'adminUrl' => admin_url('admin.php'),
        ]);
        wp_add_inline_script($handle, 'window.WNW_API = window.WNW_API || WNW_API;', 'after');

        // WNW_CONFIG for compatibility with standalone mode code
        wp_localize_script($handle, 'WNW_CONFIG', [
            'restUrl' => untrailingslashit(esc_url_raw(rest_url('woonoow/v1'))),
            'nonce' => wp_create_nonce('wp_rest'),
            'standaloneMode' => false,
            'wpAdminUrl' => admin_url('admin.php?page=woonoow'),
            'isAuthenticated' => is_user_logged_in(),
            'pluginUrl' => trailingslashit(plugins_url('/', dirname(__DIR__))),
        ]);
        wp_add_inline_script($handle, 'window.WNW_CONFIG = window.WNW_CONFIG || WNW_CONFIG;', 'after');

        // WordPress REST API settings (for media upload compatibility)
        wp_localize_script($handle, 'wpApiSettings', [
            'root' => untrailingslashit(esc_url_raw(rest_url())),
            'nonce' => wp_create_nonce('wp_rest'),
        ]);
        wp_add_inline_script($handle, 'window.wpApiSettings = window.wpApiSettings || wpApiSettings;', 'after');

        // Also expose compact global for convenience
        wp_localize_script($handle, 'wnw', [
            'isDev' => true,
            'devServer' => $dev_url,
            'adminUrl' => admin_url('admin.php'),
            'siteTitle' => get_bloginfo('name') ?: 'WooNooW',
        ]);
        wp_add_inline_script($handle, 'window.wnw = window.wnw || wnw;', 'after');

        // Localize store currency data (same as prod)
        wp_localize_script($handle, 'WNW_STORE', self::store_runtime());
        wp_add_inline_script($handle, 'window.WNW_STORE = window.WNW_STORE || WNW_STORE;', 'after');

        // Localize Woo menus snapshot for instant render
        $menus_snapshot = class_exists(MenuProvider::class) ? MenuProvider::get_snapshot() : [];
        wp_localize_script($handle, 'WNW_WC_MENUS', ['items' => $menus_snapshot]);
        wp_add_inline_script($handle, 'window.WNW_WC_MENUS = window.WNW_WC_MENUS || WNW_WC_MENUS;', 'after');

        // Addon system data
        wp_localize_script($handle, 'WNW_ADDONS', AddonRegistry::get_frontend_registry());
        wp_add_inline_script($handle, 'window.WNW_ADDONS = window.WNW_ADDONS || WNW_ADDONS;', 'after');

        wp_localize_script($handle, 'WNW_ADDON_ROUTES', RouteRegistry::get_frontend_routes());
        wp_add_inline_script($handle, 'window.WNW_ADDON_ROUTES = window.WNW_ADDON_ROUTES || WNW_ADDON_ROUTES;', 'after');

        wp_localize_script($handle, 'WNW_NAV_TREE', NavigationRegistry::get_frontend_nav_tree());
        wp_add_inline_script($handle, 'window.WNW_NAV_TREE = window.WNW_NAV_TREE || WNW_NAV_TREE;', 'after');

        // Temporary compat aliases for old WNM_*
        wp_add_inline_script($handle, 'window.WNM_API = window.WNM_API || window.WNW_API;', 'after');
        wp_add_inline_script($handle, 'window.WNM_WC_MENUS = window.WNM_WC_MENUS || window.WNW_WC_MENUS;', 'after');

        // 2) Print a real module tag in the footer to load Vite client + app
        add_action('admin_print_footer_scripts', function () use ($dev_url) {
            // 1) React Refresh preamble (required by @vitejs/plugin-react)
            ?>
            <script type="module">
                import RefreshRuntime from "<?php echo esc_url($dev_url); ?>/@react-refresh";
                RefreshRuntime.injectIntoGlobalHook(window);
                window.$RefreshReg$ = () => { };
                window.$RefreshSig$ = () => (type) => type;
                window.__vite_plugin_react_preamble_installed__ = true;
            </script>
            <?php

            // 2) Vite client (HMR)
            printf('<script type="module" src="%s/@vite/client"></script>' . "\n", esc_url($dev_url));

            // 3) Your app entry
            printf('<script type="module">import "%s/src/main.tsx";</script>' . "\n", esc_url($dev_url));
        }, 1);
    }

    /** ----------------------------------------
     *  PROD MODE (built assets in admin-spa/dist)
     *  -------------------------------------- */
    private static function enqueue_prod(): void
    {
        // Get plugin root directory (2 levels up from includes/Admin/)
        $plugin_dir = dirname(dirname(__DIR__));
        $dist_dir = $plugin_dir . '/admin-spa/dist/';
        $base_url = plugins_url('admin-spa/dist/', $plugin_dir . '/woonoow.php');

        $css = 'app.css';
        $js = 'app.js';

        $ver_css = file_exists($dist_dir . $css) ? (string) filemtime($dist_dir . $css) : self::asset_version();
        $ver_js = file_exists($dist_dir . $js) ? (string) filemtime($dist_dir . $js) : self::asset_version();

        // Debug logging
        if (defined('WP_DEBUG') && WP_DEBUG) {
            error_log('[WooNooW Assets] Dist dir: ' . $dist_dir);
            error_log('[WooNooW Assets] CSS exists: ' . (file_exists($dist_dir . $css) ? 'yes' : 'no'));
            error_log('[WooNooW Assets] JS exists: ' . (file_exists($dist_dir . $js) ? 'yes' : 'no'));
            error_log('[WooNooW Assets] CSS URL: ' . $base_url . $css);
            error_log('[WooNooW Assets] JS URL: ' . $base_url . $js);
        }

        if (file_exists($dist_dir . $css)) {
            wp_enqueue_style('wnw-admin', $base_url . $css, [], $ver_css);
            // Note: Icon fixes are now in index.css with proper specificity
        }

        if (file_exists($dist_dir . $js)) {
            wp_enqueue_script('wnw-admin', $base_url . $js, ['wp-element'], $ver_js, true);

            // Add type="module" attribute for Vite build
            add_filter('script_loader_tag', function ($tag, $handle, $src) {
                if ($handle === 'wnw-admin') {
                    $tag = str_replace('<script ', '<script type="module" ', $tag);
                }
                return $tag;
            }, 10, 3);

            self::localize_runtime('wnw-admin');
        }
    }

    /** Attach runtime config to a handle */
    private static function localize_runtime(string $handle): void
    {
        wp_localize_script($handle, 'WNW_API', [
            'root' => untrailingslashit(esc_url_raw(rest_url('woonoow/v1'))),
            'nonce' => wp_create_nonce('wp_rest'),
            'isDev' => self::is_dev_mode(),
            'devServer' => self::dev_server_url(),
            'adminScreen' => 'woonoow',
            'adminUrl' => admin_url('admin.php'),
        ]);

        // WNW_CONFIG for compatibility with standalone mode code
        wp_localize_script($handle, 'WNW_CONFIG', [
            'restUrl' => untrailingslashit(esc_url_raw(rest_url('woonoow/v1'))),
            'nonce' => wp_create_nonce('wp_rest'),
            'standaloneMode' => false,
            'wpAdminUrl' => admin_url('admin.php?page=woonoow'),
            'isAuthenticated' => is_user_logged_in(),
            'pluginUrl' => trailingslashit(plugins_url('/', dirname(__DIR__))),
        ]);

        // WordPress REST API settings (for media upload compatibility)
        wp_localize_script($handle, 'wpApiSettings', [
            'root' => untrailingslashit(esc_url_raw(rest_url())),
            'nonce' => wp_create_nonce('wp_rest'),
        ]);

        wp_localize_script($handle, 'WNW_STORE', self::store_runtime());
        wp_add_inline_script($handle, 'window.WNW_STORE = window.WNW_STORE || WNW_STORE;', 'after');

        // Compact global (prod)
        wp_localize_script($handle, 'wnw', [
            'isDev' => (bool) self::is_dev_mode(),
            'devServer' => (string) self::dev_server_url(),
            'adminUrl' => admin_url('admin.php'),
            'siteTitle' => get_bloginfo('name') ?: 'WooNooW',
        ]);
        wp_add_inline_script($handle, 'window.wnw = window.wnw || wnw;', 'after');

        // Menus snapshot (prod)
        $menus_snapshot = class_exists(MenuProvider::class) ? MenuProvider::get_snapshot() : [];
        wp_localize_script($handle, 'WNW_WC_MENUS', ['items' => $menus_snapshot]);
        wp_add_inline_script($handle, 'window.WNW_WC_MENUS = window.WNW_WC_MENUS || WNW_WC_MENUS;', 'after');

        // Addon system data (prod)
        wp_localize_script($handle, 'WNW_ADDONS', AddonRegistry::get_frontend_registry());
        wp_add_inline_script($handle, 'window.WNW_ADDONS = window.WNW_ADDONS || WNW_ADDONS;', 'after');

        wp_localize_script($handle, 'WNW_ADDON_ROUTES', RouteRegistry::get_frontend_routes());
        wp_add_inline_script($handle, 'window.WNW_ADDON_ROUTES = window.WNW_ADDON_ROUTES || WNW_ADDON_ROUTES;', 'after');

        wp_localize_script($handle, 'WNW_NAV_TREE', NavigationRegistry::get_frontend_nav_tree());
        wp_add_inline_script($handle, 'window.WNW_NAV_TREE = window.WNW_NAV_TREE || WNW_NAV_TREE;', 'after');

        // Temporary compat aliases for old WNM_*
        wp_add_inline_script($handle, 'window.WNM_API = window.WNM_API || window.WNW_API;', 'after');
        wp_add_inline_script($handle, 'window.WNM_WC_MENUS = window.WNM_WC_MENUS || window.WNW_WC_MENUS;', 'after');
    }

    /** Runtime store meta for frontend (currency, decimals, separators, position). */
    private static function store_runtime(): array
    {
        // WooCommerce helpers may not exist in some contexts; guard with defaults
        $currency = function_exists('get_woocommerce_currency') ? get_woocommerce_currency() : 'USD';
        $currency_sym = function_exists('get_woocommerce_currency_symbol') ? get_woocommerce_currency_symbol($currency) : '$';
        $decimals = function_exists('wc_get_price_decimals') ? wc_get_price_decimals() : 2;
        $thousand_sep = function_exists('wc_get_price_thousand_separator') ? wc_get_price_thousand_separator() : ',';
        $decimal_sep = function_exists('wc_get_price_decimal_separator') ? wc_get_price_decimal_separator() : '.';
        $currency_pos = function_exists('get_option') ? get_option('woocommerce_currency_pos', 'left') : 'left';

        return [
            'currency' => $currency,
            'currency_symbol' => $currency_sym,
            'decimals' => (int) $decimals,
            'thousand_sep' => (string) $thousand_sep,
            'decimal_sep' => (string) $decimal_sep,
            'currency_pos' => (string) $currency_pos,
        ];
    }

    /** Determine dev mode:
     *  - ONLY enabled if constant WOONOOW_ADMIN_DEV=true is explicitly set
     *  - or filter override (woonoow/admin_is_dev)
     *  
     *  Note: We don't check WP_ENV to avoid accidentally enabling dev mode
     *  in Local by Flywheel or other local dev environments.
     */
    private static function is_dev_mode(): bool
    {
        // Only enable dev mode if explicitly set via constant
        $const_dev = defined('WOONOOW_ADMIN_DEV') && WOONOOW_ADMIN_DEV === true;

        /**
         * Filter: force dev/prod mode for WooNooW admin assets.
         * Return true to use Vite dev server, false to use built assets.
         * 
         * IMPORTANT: This filter should NOT be used in production!
         * Only use it during development.
         */
        $filtered = apply_filters('woonoow/admin_is_dev', $const_dev);

        // Debug logging (only if WP_DEBUG is enabled)
        if (defined('WP_DEBUG') && WP_DEBUG && $filtered !== $const_dev) {
            error_log('[WooNooW Assets] Dev mode changed by filter: ' . ($filtered ? 'true' : 'false'));
        }

        return (bool) $filtered;
    }

    /** Dev server URL (filterable) */
    private static function dev_server_url(): string
    {
        // Auto-detect based on current host (for Local by Flywheel compatibility)
        $host = $_SERVER['HTTP_HOST'] ?? 'localhost';
        $protocol = is_ssl() ? 'https' : 'http';

        // If using *.local domain (Local by Flywheel), use HTTPS
        if (strpos($host, '.local') !== false) {
            $protocol = 'https';
        }

        $default = $protocol . '://' . $host . ':5173';

        /** Filter: change dev server URL if needed */
        return (string) apply_filters('woonoow/admin_dev_server', $default);
    }

    /** Basic asset versioning */
    private static function asset_version(): string
    {
        // Bump when releasing; in dev we don't cache-bust
        return defined('WOONOOW_VERSION') ? WOONOOW_VERSION : '0.1.0';
    }
}