import 'package:flutter/foundation.dart';
import 'package:flutter/services.dart';

import 'gravity_engine_platform_interface.dart';

/// An implementation of [GravityEnginePlatform] that uses method channels.
class MethodChannelGravityEngine extends GravityEnginePlatform {
  /// The method channel used to interact with the native platform.
  @visibleForTesting
  final methodChannel = const MethodChannel('gravity_engine');

  /// Initializes the Gravity Engine SDK.
  /// Returns `true` if the user is attributed, `false` otherwise.
  @override
  Future<bool> initialize(String appId, String accessToken, String clientId,
      String channel, bool debug) async {
    final result = await methodChannel.invokeMethod<bool>(
      'initialize',
      <String, dynamic>{
        'appId': appId,
        'accessToken': accessToken,
        'debug': debug,
        'clientId': clientId,
        'channel': channel,
      },
    );
    return result ?? false;
  }

  @override
  Future<void> trackEvent(
      String eventName, Map<String, dynamic> eventProperties) async {
    await methodChannel.invokeMethod<void>(
      'track',
      <String, dynamic>{
        'eventId': eventName,
        'eventParams': eventProperties,
      },
    );
  }

  @override
  Future<void> trackPay(String orderNo, String itemName, int amountCent,
      String currency, PayType payType) async {
    await methodChannel.invokeMethod<void>(
      'trackPay',
      <String, dynamic>{
        "orderNo": orderNo,
        "itemName": itemName,
        "amount": amountCent,
        "currency": currency,
        "payType": payType.name,
      },
    );
  }
}

enum PayType {
  alipay,
  wechat,
}

extension PayTypeExtension on PayType {
  String get name {
    switch (this) {
      case PayType.alipay:
        return "支付宝";
      case PayType.wechat:
        return "微信";
    }
  }
}