import 'dart:io';

import 'package:flutter/cupertino.dart';
import 'package:in_app_purchase/in_app_purchase.dart';
import 'package:in_app_purchase_android/billing_client_wrappers.dart';
import 'package:in_app_purchase_android/in_app_purchase_android.dart';
import 'package:in_app_purchase_storekit/in_app_purchase_storekit.dart';
//工具类
class KtUtils {
  ///获取时区
  static String getTimeZoneOffset(DateTime dateTime) {
    Duration offset = dateTime.timeZoneOffset;
    String sign = offset.isNegative ? '-' : '+';
    int hours = offset.inHours.abs();
    int minutes = (offset.inMinutes.abs() % 60);

    return 'GMT$sign${hours.toString().padLeft(2, '0')}:${minutes.toString().padLeft(2, '0')}';
  }

  static bool isEmpty(dynamic value) {
    return value == null ||
        (value is Map && value.isEmpty) ||
        (value is String && value.isEmpty) ||
        (value is Iterable && value.isEmpty);
  }

  static bool isNotEmpty(dynamic value) {
    return !isEmpty(value);
  }

///获取iOS内购优惠价格（安卓为获取原价）
  static String getDiscountPrice(ProductDetails? product, {bool showDiscount = false}) {
    String price = product?.price ?? '';
    if (product == null) return price;
    if (Platform.isIOS) {
      if (product is AppStoreProductDetails) {
        debugPrint("skProduct优惠价格: ${product.skProduct.price}");
        for (final discount in product.skProduct.discounts) {
          debugPrint("优惠ID: ${discount.identifier}");
          debugPrint("优惠价格: ${discount.price}");
          debugPrint("priceLocale: ${discount.priceLocale.currencySymbol}-${discount.priceLocale.currencyCode}");
          debugPrint("优惠周期: ${discount.subscriptionPeriod.numberOfUnits}");
          debugPrint("支付模式: ${discount.paymentMode}"); // freeTrial, payAsYouGo, payUpFront
          if (isNotEmpty(discount.price)) price = discount.priceLocale.currencySymbol + discount.price;
          break;
        }
      }
    } else if (Platform.isAndroid) {
      if (product is GooglePlayProductDetails) {
        for (SubscriptionOfferDetailsWrapper? offer in product.productDetails.subscriptionOfferDetails ?? []) {
          debugPrint('Base plan ID: ${offer?.basePlanId}');
          debugPrint('Offer ID: ${offer?.offerId}');
          if (offer?.pricingPhases.isEmpty ?? true) continue;
          for (PricingPhaseWrapper phase in offer!.pricingPhases) {
            debugPrint('价格: ${phase.formattedPrice}');
            debugPrint('周期: ${phase.billingPeriod}');
            debugPrint('周期内收费次数: ${phase.recurrenceMode}');
            if (isNotEmpty(phase.formattedPrice)) {
              price = phase.formattedPrice;
              if (showDiscount) return price;
            }
          }
        }
      }
    }
    return price;
  }

  static Map<String, dynamic> filterVipType(String? type) {
    if (isEmpty(type)) {
      return {};
    }
    List<Map<String, dynamic>> vipTypes = [
      {'type': 'week', 'name': 'Weekly', 'shortName': 'week'},
      {'type': 'month', 'name': 'Monthly', 'shortName': 'month'},
      {'type': 'three_months', 'name': 'Quarterly', 'shortName': 'quarter'},
      {'type': 'yearly', 'name': 'Yearly', 'shortName': 'year'},
      {'type': 'year', 'name': 'Yearly', 'shortName': 'year'},
    ];
    final filterType = vipTypes.where((item) => item['type'] == type).cast<Map<String, dynamic>?>().firstOrNull;
    if (filterType != null) {
      return filterType;
    }
    return {};
  }
}