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

use Automattic\WooCommerce\Blocks\Integrations\IntegrationInterface;

class WC_AddressZen_Blocks_Integration implements IntegrationInterface {

    /**
     * The name of the integration.
     *
     * @return string
     */
    public function get_name() {
        return 'addresszen';
    }

    /**
     * When called invokes any initialization/setup for the integration.
     */
    public function initialize() {
        $script_path = ADDRESSZEN_DIR . 'js/blocks/checkout-blocks-frontend.asset.php';
        $script_asset = file_exists( $script_path )
            ? require $script_path
            : array( 'dependencies' => array(), 'version' => ADDRESSZEN_VERSION );

        wp_register_script(
            'addresszen-blocks-frontend',
            ADDRESSZEN_URL . 'js/blocks/checkout-blocks-frontend.js',
            $script_asset['dependencies'],
            $script_asset['version'],
            true
        );

        wp_register_style(
            'addresszen-blocks-style',
            ADDRESSZEN_URL . 'css/addresszen.css',
            array(),
            ADDRESSZEN_VERSION
        );
    }

    /**
     * Returns an array of script handles to enqueue in the frontend context.
     *
     * @return string[]
     */
    public function get_script_handles() {
        return array( 'addresszen-blocks-frontend' );
    }

    /**
     * Returns an array of script handles to enqueue in the editor context.
     *
     * @return string[]
     */
    public function get_editor_script_handles() {
        return array();
    }

    /**
     * An array of key, value pairs of data made available to the block on the client side.
     * Accessible via wcSettings['addresszen_data'].
     *
     * @return array
     */
    public function get_script_data() {
        return self::build_settings();
    }

    /**
     * Build the full settings array for the frontend.
     * Uses the canonical get_options() from the integration class.
     *
     * @return array
     */
    public static function build_settings() {
        if ( ! function_exists( 'WC' ) || ! WC() || ! isset( WC()->integrations ) ) {
            return self::get_defaults();
        }

        $integrations = WC()->integrations->get_integrations();
        if ( ! is_array( $integrations ) || ! isset( $integrations['addresszen'] ) ) {
            return self::get_defaults();
        }

        $options = $integrations['addresszen']->get_options();

        // Parse JSON overrides into objects for JavaScript consumption
        if ( ! empty( $options['autocompleteOverride'] ) && is_string( $options['autocompleteOverride'] ) ) {
            $options['autocompleteOverride'] = self::parse_json_override( $options['autocompleteOverride'] );
        }

        return $options;
    }

    /**
     * Default settings when WooCommerce isn't available.
     *
     * @return array
     */
    private static function get_defaults() {
        return [
            'enabled' => false,
            'publicKey' => '',
            'autocomplete' => true,
            'watchCountry' => false,
            'separateFinder' => false,
            'separateFinderPosition' => 'above_address',
            'hideAddressFields' => false,
            'allowManualEntry' => true,
            'removeOrganisation' => true,
            'populateCounty' => true,
            'autocompleteOverride' => '',
            'addressFinderLabel' => '',
            'addressLine3Field' => '',
            'limitLineOne' => false,
            'maxLineOne' => 40,
            'transliterate' => false,
            'asciiOnly' => false,
            'fillCompany' => false,
            'blockPoBoxes' => false,
            'usZip5Only' => true,
        ];
    }

    /**
     * Parse and validate a JSON override string.
     *
     * @param string $raw_override
     * @return mixed Parsed JSON or empty string on failure
     */
    private static function parse_json_override( $raw_override ) {
        if ( empty( $raw_override ) ) {
            return '';
        }

        $sanitized = wp_kses( $raw_override, array() );
        $decoded = html_entity_decode( $sanitized );
        $parsed = json_decode( $decoded, true );

        if ( json_last_error() !== JSON_ERROR_NONE ) {
            if ( defined( 'WP_DEBUG' ) && WP_DEBUG ) {
                error_log( '[AddressZen] Invalid JSON in override setting' );
            }
            return '';
        }

        return $parsed;
    }
}