package com.fastwechat

import android.app.Activity
import android.content.Intent
import android.util.Log
import com.tencent.mm.opensdk.constants.ConstantsAPI
import com.tencent.mm.opensdk.modelbase.BaseReq
import com.tencent.mm.opensdk.modelbase.BaseResp
import com.tencent.mm.opensdk.modelpay.PayReq
import com.tencent.mm.opensdk.openapi.IWXAPI
import com.tencent.mm.opensdk.openapi.IWXAPIEventHandler
import com.tencent.mm.opensdk.openapi.WXAPIFactory

open class WechatCenter private constructor() {
  companion object {
    val TAG: String = "*** WechatCenter ****"
    private var instance: WechatCenter? = null
      get() {
        if (field == null) {
          field = WechatCenter()
        }
        return field
      }

    @Synchronized
    fun shared(): WechatCenter {
      return instance!!
    }

    var api: IWXAPI? = null

    open class PayParams(
      val appId: String,
      val partnerId: String,
      val prepayId: String,
      val nonceStr: String,
      val timestamp: String,
      val sign: String
    ) {
      val packageValue: String = "Sign=WXPay"
    }
  }

  private var appId: String? = null
  private var isAppIDRegistered: Boolean = false

  private fun checkIsInitial() {
    if (api == null) {
      throw Exception("AppID Uninitialized")
    }
  }

  /**
   * 注册微信APP_ID
   */
  fun register(activity: Activity, appId: String) {
    this.appId = appId
    api = WXAPIFactory.createWXAPI(activity, null, false)
    api!!.registerApp(appId)
    isAppIDRegistered = true
  }

  fun isInstalled():Boolean {
    this.checkIsInitial()
    return api!!.isWXAppInstalled
  }

  fun pay(params: PayParams) {
    this.checkIsInitial()
    Thread(object : Runnable {
      override fun run() {
        val request = PayReq();
        request.appId = params.appId;
        request.partnerId = params.partnerId;
        request.prepayId = params.prepayId;
        request.packageValue = params.packageValue;
        request.nonceStr = params.nonceStr;
        request.timeStamp = params.timestamp;
        request.sign = params.sign;
        api!!.sendReq(request);
      }
    }).start()
  }

  fun handleIntent(intent: Intent, handler: IWXAPIEventHandler) {
    this.checkIsInitial()
    api!!.handleIntent(intent, handler);
  }

  fun handleWxReq(baseReq: BaseReq) {
    //ignore
  }

  fun handleWxResp(baseResp: BaseResp,activity: Activity) {
    if (baseResp.type == ConstantsAPI.COMMAND_PAY_BY_WX) {
      FastWechatModule.send(mapOf("code" to baseResp.errCode))
    }
    activity.finish()
  }
}