# 鸿蒙应用开发手册

import * as wxopensdk from '@tencent/wechat_open_sdk';

// WXApi 是第三方 app 和微信通信的 openApi 接口，其实例通过 WXAPIFactory 获取
// 需要传入应用申请到的 AppID（指的是移动应用 AppID，不要填小程序 AppID）
export const WXApi = wxopensdk.WXAPIFactory.createWXAPI(APP_ID)

// WXApiEventHandler 为微信数据的回调
class WXApiEventHandlerImpl implements wxopensdk.WXApiEventHandler {
  private onReqCallbacks: Map<OnWXReq, OnWXReq> = new Map
  private onRespCallbacks: Map<OnWXResp, OnWXResp> = new Map

  registerOnWXReqCallback(on: OnWXReq) {
    this.onReqCallbacks.set(on, on)
  }
  unregisterOnWXReqCallback(on: OnWXReq) {
    this.onReqCallbacks.delete(on)
  }

  registerOnWXRespCallback(on: OnWXResp) {
    this.onRespCallbacks.set(on, on)
  }
  unregisterOnWXRespCallback(on: OnWXResp) {
    this.onRespCallbacks.delete(on)
  }

  onReq(req: wxopensdk.BaseReq): void {
    Log.i(kTag, "onReq:%s", JSON.stringify(req))
    this.onReqCallbacks.forEach((on) => {
      on(req)
    })
  }

  onResp(resp: wxopensdk.BaseResp): void {
    Log.i(kTag, "onResp:%s", JSON.stringify(resp))
    this.onRespCallbacks.forEach((on) => {
      on(resp)
    })
  }
}
export const WXEventHandler = new WXApiEventHandlerImpl


let req = new wxopensdk.SendAuthReq
req.isOption1 = false
req.nonAutomatic = true
req.scope = 'snsapi_userinfo'
req.state = 'none'
req.transaction = 'test123'

// 向微信发送登录请求:
//   context 为 ohos 内置类，app 间跳转需依赖该类，开发者可在 Component 中获取
//   finished 为跳转微信的结果：true 表示跳转成功；false 表示跳转失败，可能是因为微信未安装
let finished = await this.wxApi.sendReq(context: common.UIAbilityContext, req)


// 在 EntryAbility 中响应来自微信的回调
export default class EntryAbility extends UIAbility {
  onCreate(want: Want, _launchParam: AbilityConstant.LaunchParam): void {
    this.handleWeChatCallIfNeed(want)
  }
  
  onNewWant(want: Want, _launchParam: AbilityConstant.LaunchParam): void {
    this.handleWeChatCallIfNeed(want)
  }

  private handleWeChatCallIfNeed(want: Want) {
    WXApi.handleWant(want, WXEventHandler)
  }
}

  /**
   * 从微信启动 App
   *
   * @param req
   */
  onReq(req: wxopensdk.BaseReq): void {
    if (req instanceof wxopensdk.LaunchFromWXReq) {
      // 获取开放标签传递的 extinfo 数据逻辑
      let messageExt = req.message?.messageExt
      // Handle...
    }
  }