import 'dart:convert';
import 'package:url_launcher/url_launcher.dart';

class JDLauncher {
  /// 跳转京东店铺（App 优先）
  static Future<void> openShop(String shopUrlOrShortLink) async {
    final isShortLink = shopUrlOrShortLink.contains("3.cn");

    if (isShortLink) {
      // 如果是短链接，比如 https://3.cn/xxxxx，直接尝试打开即可
      await _launchJD(shopUrlOrShortLink);
    } else {
      // 如果是普通店铺链接，比如 https://mall.jd.com/index-xxxxxxx.html
      final jdAppUrl = _buildJDAppUrl("m", {"url": shopUrlOrShortLink});
      await _launchJD(jdAppUrl, fallbackUrl: shopUrlOrShortLink);
    }
  }

  /// 跳转京东商品详情页（传入 SKU）
  static Future<void> openProduct(String skuId) async {
    final webUrl = "https://item.jd.com/$skuId.html";
    final jdAppUrl = _buildJDAppUrl("productDetail", {"skuId": skuId});
    await _launchJD(jdAppUrl, fallbackUrl: webUrl);
  }

  /// 构建京东 App 的 scheme 跳转 URL
  static String _buildJDAppUrl(String des, Map<String, dynamic> extraParams) {
    final params = {
      "category": "jump",
      "des": des,
      ...extraParams,
    };
    final encoded = Uri.encodeComponent(jsonEncode(params));
    return "openapp.jdmobile://virtual?params=$encoded";
  }

  /// 通用跳转逻辑（优先跳 App，失败跳网页）
  static Future<void> _launchJD(String url, {String? fallbackUrl}) async {
    try {
      final uri = Uri.parse(url);
      if (await canLaunchUrl(uri)) {
        await launchUrl(uri, mode: LaunchMode.externalApplication);
      } else if (fallbackUrl != null) {
        await launchUrl(Uri.parse(fallbackUrl), mode: LaunchMode.externalApplication);
      }
    } catch (_) {
      if (fallbackUrl != null) {
        await launchUrl(Uri.parse(fallbackUrl), mode: LaunchMode.externalApplication);
      }
    }
  }
}