<?php
if ( ! defined('ABSPATH') ) {
    exit;
}

/**
 * Script and style loader functionality
 *
 * @category Functionality
 * @package  AISK
 * @author   Aisk Team <support@aisk.chat>
 * @license  GPL-2.0+ https://www.gnu.org/licenses/gpl-2.0.html
 * @link     https://aisk.chat
 */

/**
 * AISK_Scripts Class
 *
 * Handles loading and localization of scripts and styles for the chat widget
 *
 * @category Class
 * @package  AISK
 * @author   Aisk Team <support@aisk.chat>
 * @license  GPL-2.0+ https://www.gnu.org/licenses/gpl-2.0.html
 * @link     https://aisk.chat
 */
class AISK_Scripts {

    /**
     * Translate a setting when empty or still equal to the English default.
     *
     * @param string $value   Saved setting value.
     * @param string $default English msgid / default.
     * @return string
     */
    private static function localized_setting( $value, $default ) {
        if ( is_string( $value ) && '' !== trim( $value ) && $value !== $default ) {
            return $value;
        }

        switch ( $default ) {
            case 'Hi there! How can I help you?':
                return __( 'Hi there! How can I help you?', 'aisk-ai-chat' );
            case 'Type your message...':
                return __( 'Type your message...', 'aisk-ai-chat' );
            case 'Hey, need help? 👋':
                return __( 'Hey, need help? 👋', 'aisk-ai-chat' );
            default:
                return $default;
        }
    }

    /**
     * Inject Jed locale data before the chat widget script.
     *
     * Fallback when wp_set_script_translations does not print (missing deps / strategy edge cases).
     *
     * @return void
     */
    private static function inject_script_translations() {
        $json = load_script_textdomain(
            'aisk-chat-widget',
            'aisk-ai-chat',
            AISK_PLUGIN_DIR . 'languages'
        );

        if ( ! $json ) {
            // Try handle-named catalog directly.
            $locale   = function_exists( 'determine_locale' ) ? determine_locale() : get_locale();
            $handle_f = AISK_PLUGIN_DIR . 'languages/aisk-ai-chat-' . $locale . '-aisk-chat-widget.json';
            if ( is_readable( $handle_f ) ) {
                $json = file_get_contents( $handle_f );
            }
        }

        if ( ! $json ) {
            return;
        }

        $inline = sprintf(
            '( function( domain, translations ) {
                if ( ! window.wp || ! wp.i18n || ! wp.i18n.setLocaleData ) { return; }
                var localeData = translations.locale_data[ domain ] || translations.locale_data.messages;
                if ( ! localeData ) { return; }
                localeData[""] = localeData[""] || {};
                localeData[""].domain = domain;
                wp.i18n.setLocaleData( localeData, domain );
            } )( "aisk-ai-chat", %s );',
            $json
        );

        wp_add_inline_script( 'aisk-chat-widget', $inline, 'before' );
    }

    /**
     * Loads chat widget assets and localizes settings
     *
     * Enqueues required CSS/JS files and prepares frontend settings
     * for the chat widget functionality.
     *
     * @return array Processed frontend settings
     */
    public static function load_chat_widget_assets() {
        // Register and enqueue chat widget styles
        wp_register_style(
            'aisk-chat-widget-styles',
            AISK_PLUGIN_URL . 'build/chat-widget.css',
            [],
            AISK_VERSION
        );
        wp_enqueue_style('aisk-chat-widget-styles');

        // Register and enqueue chat formatter styles
        wp_register_style(
            'aisk-chat-formatter-styles',
            AISK_PLUGIN_URL . 'assets/css/chat-formatter.css',
            ['aisk-chat-widget-styles'],
            AISK_VERSION
        );
        wp_enqueue_style('aisk-chat-formatter-styles');

        // Ensure i18n stack is present on the frontend (required for __() in the widget).
        wp_enqueue_script( 'wp-hooks' );
        wp_enqueue_script( 'wp-i18n' );

        // Register and enqueue chat widget scripts.
        // Avoid "defer" so wp-i18n + locale data always run before the widget IIFE.
        wp_register_script(
            'aisk-chat-widget',
            AISK_PLUGIN_URL . 'build/chat-widget.js',
            ['wp-hooks', 'wp-i18n', 'wp-element', 'react', 'react-dom'],
            AISK_VERSION,
            true
        );
        wp_enqueue_script('aisk-chat-widget');
        wp_set_script_translations( 'aisk-chat-widget', 'aisk-ai-chat', AISK_PLUGIN_DIR . 'languages' );
        self::inject_script_translations();

        // Get settings
        $settings = get_option('aisk_settings', []);

        $default_greeting     = 'Hi there! How can I help you?';
        $default_placeholder  = 'Type your message...';
        $default_bubble       = 'Hey, need help? 👋';
        $default_rolling      = [
            '👋 Need help?',
            '💬 Chat with us!',
            '🛍️ Find products',
        ];

        $saved_rolling = isset( $settings['chatwidget']['rolling_messages'] ) ? $settings['chatwidget']['rolling_messages'] : null;
        if ( ! is_array( $saved_rolling ) || empty( $saved_rolling ) || $saved_rolling === $default_rolling ) {
            $rolling_messages = [
                __( '👋 Need help?', 'aisk-ai-chat' ),
                __( '💬 Chat with us!', 'aisk-ai-chat' ),
                __( '🛍️ Find products', 'aisk-ai-chat' ),
            ];
        } else {
            $rolling_messages = $saved_rolling;
        }

        // Create frontend-only settings object
        $frontend_settings = [
            'chatwidget' => [
                'chat_icon' => isset($settings['chatwidget']['chat_icon']) ? $settings['chatwidget']['chat_icon'] : '',
                'widget_logo' => isset($settings['chatwidget']['widget_logo']) ? $settings['chatwidget']['widget_logo'] : '',
                'widget_text' => isset($settings['chatwidget']['widget_text']) && "" !== $settings['chatwidget']['widget_text'] ? $settings['chatwidget']['widget_text'] : get_bloginfo('name'),
                'widget_color' => isset($settings['chatwidget']['widget_color']) ? $settings['chatwidget']['widget_color'] : '#4F46E5',
                'suggested_questions' => isset($settings['chatwidget']['suggested_questions']) ? $settings['chatwidget']['suggested_questions'] : [],
                'widget_position' => isset($settings['chatwidget']['widget_position']) ? $settings['chatwidget']['widget_position'] : 'bottom-right',
                'widget_greeting' => self::localized_setting(
                    isset( $settings['chatwidget']['widget_greeting'] ) ? $settings['chatwidget']['widget_greeting'] : '',
                    $default_greeting
                ),
                'widget_placeholder' => self::localized_setting(
                    isset( $settings['chatwidget']['widget_placeholder'] ) ? $settings['chatwidget']['widget_placeholder'] : '',
                    $default_placeholder
                ),
                'widget_title' => isset($settings['chatwidget']['widget_title']) ? $settings['chatwidget']['widget_title'] : '',
                'widget_subtitle' => isset($settings['chatwidget']['widget_subtitle']) ? $settings['chatwidget']['widget_subtitle'] : '',
                'bubble_type' => isset($settings['chatwidget']['bubble_type']) ? $settings['chatwidget']['bubble_type'] : 'default',
                'default_message' => self::localized_setting(
                    isset( $settings['chatwidget']['default_message'] ) ? $settings['chatwidget']['default_message'] : '',
                    $default_bubble
                ),
                'rolling_messages' => $rolling_messages,
                // Orders tab in the bottom menu (only shown when WooCommerce is enabled); on by default
                'show_orders_tab' => isset($settings['chatwidget']['show_orders_tab']) ? (bool) $settings['chatwidget']['show_orders_tab'] : true,
            ],
            'integrations' => [
                'whatsapp' => [
                    'enabled' => isset($settings['integrations']['whatsapp']['enabled']) ? $settings['integrations']['whatsapp']['enabled'] : false,
                    'phone_number' => isset($settings['integrations']['whatsapp']['phone_number']) ? $settings['integrations']['whatsapp']['phone_number'] : '',

                ],
                'telegram' => [
                    'enabled' => isset($settings['integrations']['telegram']['enabled']) ? $settings['integrations']['telegram']['enabled'] : false,
                    'bot_username' => isset($settings['integrations']['telegram']['bot_username']) ? $settings['integrations']['telegram']['bot_username'] : '',
                ],
                'contact_form' => [
                    'enabled' => isset($settings['integrations']['contact_form']['enabled']) ? $settings['integrations']['contact_form']['enabled'] : false,
                    'shortcode' => isset($settings['integrations']['contact_form']['shortcode']) ? $settings['integrations']['contact_form']['shortcode'] : '',
                ],
            ],
            'colors' => [
                'primary' => isset($settings['colors']['primary']) ? $settings['colors']['primary'] : '#4F46E5',
                'secondary' => isset($settings['colors']['secondary']) ? $settings['colors']['secondary'] : '#E0E7FF',
                'text' => isset($settings['colors']['text']) ? $settings['colors']['text'] : '#FFFFFF',
            ],
            // Generated questions (admin can hide/edit them)
            'help_questions' => class_exists( 'AISK_Help_Questions' ) ? AISK_Help_Questions::get_instance()->get_active_questions() : [],
            // Only true when the WooCommerce integration is switched on and WooCommerce is active
            'woocommerce_enabled' => ! empty( $settings['ai_config']['woocommerce_enabled'] ) && class_exists( 'WooCommerce' ),
            // Footer credit link is opt-in only
            'misc' => [
                'show_credit' => ! empty( $settings['misc']['show_credit'] ),
            ],
            // Essential system paths/urls
            'pluginUrl' => AISK_PLUGIN_URL,
            'apiUrl' => rest_url('aisk/v1'),
            'adminUrl' => admin_url('admin.php'),
            'nonce' => wp_create_nonce('wp_rest'),
            'locale' => function_exists( 'determine_locale' ) ? determine_locale() : get_locale(),
        ];

        // Add custom CSS if exists
        if ( ! empty($settings['misc']['custom_css']) ) {
            wp_add_inline_style(
                'aisk-chat-widget-styles',
                wp_strip_all_tags( $settings['misc']['custom_css'] )
            );
        }

        // Allow features to modify settings
        $settings = apply_filters('aisk_script_data', $frontend_settings);

        // Localize script
        wp_localize_script('aisk-chat-widget', 'AiskData', $settings);

        return $settings;
    }
}