<?php

use Automattic\WooCommerce\Blocks\Integrations\IntegrationInterface;

if (! defined('ABSPATH')) {
    exit;
}

/**
 * Class for integrating with WooCommerce Blocks.
 *
 * @category Shipping
 */
class PR_DHL_Blocks_Integration implements IntegrationInterface
{
    /**
     * The name of the integration.
     *
     * @return string
     */
    public function get_name()
    {
        return 'pr-dhl';
    }

    /**
     * When called, invokes any initialization/setup for the integration.
     */
    public function initialize()
    {
        $this->register_scripts_and_styles();
        $this->register_ajax_actions();
        $this->localize_scripts();
    }

    /**
     * Registers scripts and styles for both editor and frontend.
     */
    private function register_scripts_and_styles()
    {
        // Register main integration script and style
        $this->register_main_integration();

        // Register block editor scripts
        $this->register_block_script(
            'pr-dhl-preferred-services-editor',
            '/build/pr-dhl-preferred-services.js',
            '/build/pr-dhl-preferred-services.asset.php'
        );

        // Register frontend scripts for blocks
        $this->register_frontend_script(
            'pr-dhl-preferred-services-frontend',
            '/build/pr-dhl-preferred-services-frontend.js',
            '/build/pr-dhl-preferred-services-frontend.asset.php'
        );

        // Register block editor scripts
        $this->register_block_script(
            'pr-dhl-closest-drop-point-editor',
            '/build/pr-dhl-closest-drop-point.js',
            '/build/pr-dhl-closest-drop-point.asset.php'
        );

        // Register frontend scripts for blocks
        $this->register_frontend_script(
            'pr-dhl-closest-drop-point-frontend',
            '/build/pr-dhl-closest-drop-point-frontend.js',
            '/build/pr-dhl-closest-drop-point-frontend.asset.php'
        );

        // Register parcel finder editor scripts
        $this->register_block_script(
            'pr-dhl-parcel-finder-editor',
            '/build/pr-dhl-parcel-finder.js',
            '/build/pr-dhl-parcel-finder.asset.php'
        );

        // Register frontend scripts for parcel finder
        $this->register_frontend_script(
            'pr-dhl-parcel-finder-frontend',
            '/build/pr-dhl-parcel-finder-frontend.js',
            '/build/pr-dhl-parcel-finder-frontend.asset.php'
        );

        // Register block styles
        $this->register_styles();
    }

    /**
     * Registers the main JS and CSS files required for the integration.
     */
    private function register_main_integration()
    {
        $script_path = '/build/index.js';
        $style_path = '/build/style-index.css';

        $script_url = PR_DHL_PLUGIN_DIR_URL.$script_path;
        $style_url = PR_DHL_PLUGIN_DIR_URL.$style_path;

        $script_asset_path = PR_DHL_PLUGIN_DIR_PATH.'/build/index.asset.php';
        $script_asset = file_exists($script_asset_path)
            ? require $script_asset_path
            : [
                'dependencies' => [],
                'version' => $this->get_file_version($script_path),
            ];

        wp_enqueue_style(
            'pr-dhl-preferred-services-integration',
            $style_url,
            [],
            $this->get_file_version($style_path)
        );

        wp_register_script(
            'pr-dhl-preferred-services-integration',
            $script_url,
            $script_asset['dependencies'],
            $script_asset['version'],
            true
        );

        wp_set_script_translations(
            'pr-dhl-preferred-services-integration',
            'dhl-for-woocommerce',
            PR_DHL_PLUGIN_DIR_PATH.'/lang'
        );
    }

    /**
     * Registers block styles for the block editor.
     */
    private function register_styles()
    {
        $block_style_path = '/build/style-index.css';
        $block_style_url = PR_DHL_PLUGIN_DIR_URL.$block_style_path;

        wp_enqueue_style(
            'pr-dhl-blocks-style',
            $block_style_url,
            [],
            $this->get_file_version($block_style_path)
        );
    }

    /**
     * Helper method to register block editor scripts.
     *
     * @param  string  $handle  Script handle name.
     * @param  string  $script_path  Path to the JS file.
     * @param  string  $asset_path  Path to the asset file.
     */
    private function register_block_script($handle, $script_path, $asset_path)
    {
        $script_url = PR_DHL_PLUGIN_DIR_URL.$script_path;
        $asset_file = PR_DHL_PLUGIN_DIR_PATH.$asset_path;
        $asset = file_exists($asset_file) ? require $asset_file : [
            'dependencies' => [],
            'version' => $this->get_file_version($script_path),
        ];

        wp_register_script(
            $handle,
            $script_url,
            $asset['dependencies'],
            $asset['version'],
            true
        );

        wp_set_script_translations(
            $handle,
            'dhl-for-woocommerce',
            PR_DHL_PLUGIN_DIR_PATH.'/lang'
        );
    }

    /**
     * Helper method to register frontend scripts.
     *
     * @param  string  $handle  Script handle name.
     * @param  string  $script_path  Path to the JS file.
     * @param  string  $asset_path  Path to the asset file.
     */
    private function register_frontend_script($handle, $script_path, $asset_path)
    {
        $script_url = PR_DHL_PLUGIN_DIR_URL.$script_path;
        $asset_file = PR_DHL_PLUGIN_DIR_PATH.$asset_path;
        $asset = file_exists($asset_file) ? require $asset_file : [
            'dependencies' => [],
            'version' => $this->get_file_version($script_path),
        ];
        // Enqueue Google Maps
        $dhl_settings = PR_DHL()->get_shipping_dhl_settings();

        wp_enqueue_script(
            $handle,
            $script_url,
            $asset['dependencies'],
            $asset['version'],
            true
        );

        wp_set_script_translations(
            $handle,
            'dhl-for-woocommerce',
            PR_DHL_PLUGIN_DIR_PATH.'/lang'
        );
    }

    /**
     * Registers AJAX actions.
     */
    private function register_ajax_actions()
    {
        add_action('wp_ajax_pr_dhl_set_checkout_post_data', [$this, 'handle_set_checkout_post_data']);
        add_action('wp_ajax_nopriv_pr_dhl_set_checkout_post_data', [$this, 'handle_set_checkout_post_data']);
        add_action('wp_ajax_pr_dhl_get_preferred_days', [$this, 'handle_get_preferred_days']);
        add_action('wp_ajax_nopriv_pr_dhl_get_preferred_days', [$this, 'handle_get_preferred_days']);
    }

    /**
     * Returns an array of script handles to enqueue in the frontend context.
     *
     * @return string[]
     */
    public function get_script_handles()
    {
        return [
            'pr-dhl-preferred-services-integration',
            'pr-dhl-preferred-services-frontend',
            'pr-dhl-closest-drop-point-frontend',
            'pr-dhl-parcel-finder-frontend',
        ];
    }

    /**
     * Returns an array of script handles to enqueue in the editor context.
     *
     * @return string[]
     */
    public function get_editor_script_handles()
    {
        return [
            'pr-dhl-preferred-services-integration',
            'pr-dhl-preferred-services-editor',
            'pr-dhl-closest-drop-point-editor',
            'pr-dhl-parcel-finder-editor',
        ];
    }

    /**
     * An array of key, value pairs of data made available to the block on the client side.
     *
     * @return array
     */
    public function get_script_data()
    {
        return [
            'pr-dhl-active' => true,
        ];
    }

    /**
     * Localizes scripts with necessary data.
     */
    private function localize_scripts()
    {
        // Fetch the shipping settings.
        $dhl_settings = $this->get_dhl_settings();

        $localize_data = [
            'pluginUrl' => PR_DHL_PLUGIN_DIR_URL,
            'dhlSettings' => $dhl_settings,
            'ajax_url' => admin_url('admin-ajax.php'),
            'nonce' => wp_create_nonce('pr_dhl_nonce'),
            'parcel_nonce' => wp_create_nonce('dhl_parcelfinder'),
            'DHL_ENGLISH_REGISTRATION_LINK' => DHL_ENGLISH_REGISTRATION_LINK,
            'DHL_GERMAN_REGISTRATION_LINK' => DHL_GERMAN_REGISTRATION_LINK,
            'locale' => get_locale(),
            'valid_countries' => ['SE', 'FI', 'BE', 'AT', 'FR'],
            'droppointAddressTypes' => PR_DHL()->get_droppoint_address_types(),
        ];

        // Localize the editor script.
        wp_localize_script(
            'pr-dhl-preferred-services-editor',
            'prDhlGlobals',
            $localize_data
        );

        // Localize the frontend scripts.
        wp_localize_script(
            'pr-dhl-preferred-services-frontend',
            'prDhlGlobals',
            $localize_data
        );

        // Localize the frontend scripts.
        wp_localize_script(
            'pr-dhl-closest-drop-point-frontend',
            'prDhlGlobals',
            $localize_data
        );

    }

    /**
     * Get the DHL settings that are relevant to the blocks.
     *
     * @throws Exception
     */
    private function get_dhl_settings(): array
    {
        $dhl_settings = PR_DHL()->get_shipping_dhl_settings();

        $settings_keys = [
            'dhl_display_packstation',
            'dhl_display_parcelshop',
            'dhl_display_post_office',
            'dhl_preferred_day',
            'dhl_preferred_location',
            'dhl_preferred_neighbour',
            'dhl_preferred_day_cost',
            'dhl_display_google_maps',
            'dhl_closest_drop_point',
        ];

        $filtered_settings = [];

        foreach ($settings_keys as $key) {
            $value = $dhl_settings[$key] ?? false;

            if ($value === 'yes') {
                $value = true;
            } elseif (! is_numeric($value)) {
                $value = false;
            }

            // Remove 'dhl_' prefix from the key.
            $clean_key = str_replace('dhl_', '', $key);
            $filtered_settings[$clean_key] = $value;
        }

        return $filtered_settings;
    }

    /**
     * Get the file modified time as a cache buster if we're in dev mode.
     *
     * @param  string  $file  Local path to the file.
     * @return string The cache buster value to use for the given file.
     */
    protected function get_file_version($file)
    {
        $file_path = PR_DHL_PLUGIN_DIR_PATH.$file;
        if (defined('SCRIPT_DEBUG') && SCRIPT_DEBUG && file_exists($file_path)) {
            return filemtime($file_path);
        }

        return PR_DHL_VERSION;
    }

    public function handle_set_checkout_post_data()
    {
        // Verify nonce
        if (! isset($_POST['nonce']) || ! wp_verify_nonce($_POST['nonce'], 'pr_dhl_nonce')) {
            wp_send_json_error(['message' => 'Invalid nonce'], 400);
            wp_die();
        }

        // Check if data is provided
        if (! isset($_POST['data']) || ! is_array($_POST['data'])) {
            wp_send_json_error(['message' => 'No data provided.'], 400);
            wp_die();
        }

        // Sanitize data
        $sanitized_data = array_map('sanitize_text_field', wp_unslash($_POST['data']));

        // Store data in WooCommerce session
        WC()->session->set('pr_dhl_checkout_post_data', $sanitized_data);

        wp_send_json_success(['message' => 'Data saved successfully.'], 200);
        wp_die();
    }

    public function handle_get_preferred_days()
    {
        // Verify nonce
        if (! isset($_POST['nonce']) || ! wp_verify_nonce($_POST['nonce'], 'pr_dhl_nonce')) {
            wp_send_json_error(['message' => 'Invalid nonce'], 400);
            wp_die();
        }

        // Retrieve post_data from WooCommerce session
        $order_data = WC()->session->get('pr_dhl_checkout_post_data');
        if (empty($order_data) || ! is_array($order_data)) {
            wp_send_json_error(['message' => 'No checkout data found.'], 400);
            wp_die();
        }

        // Use the order_data to get the preferred days
        $postcode = isset($order_data['shipping_postcode']) ? $order_data['shipping_postcode'] : '';
        $shipping_country = isset($order_data['shipping_country']) ? $order_data['shipping_country'] : '';

        if (empty($postcode)) {
            wp_send_json_error(['message' => 'Postcode not found in checkout data.'], 400);
            wp_die();
        }

        try {
            $front_end_packet = new PR_DHL_Front_End_Paket;

            // Call the validate_extra_services_available function with parameters
            $display_preferred = $front_end_packet->validate_extra_services_available(
                true,
                $shipping_country);

            if (! $display_preferred) {
                wp_send_json_error(['message' => 'Preferred services not available.'], 400);
                wp_die();
            }

            $preferred_day_time = PR_DHL()->get_dhl_preferred_day_time($postcode);
            wp_send_json_success(['preferredDays' => $preferred_day_time['preferred_day']], 200);
        } catch (Exception $e) {
            wp_send_json_error(['message' => $e->getMessage()], 500);
        }

        wp_die();
    }
}