package service

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"gorm.io/gorm"
	"pure-admin/dto"
	"pure-admin/global"
	"pure-admin/initialize/api"
	"pure-admin/model"
	"pure-admin/model/request"
	"pure-admin/model/response"
	"pure-admin/utils"
	"time"
)

func getWallet(platform, uuid string) (error, model.Wallet) {
	var (
		err    error
		result model.Wallet
	)
	err = global.MG_DB.Model(&model.Wallet{}).Where("platform = ? AND user_id = ?", platform, uuid).First(&result).Error
	return err, result
}

func FundRecharge(info *request.FundRecharge) (error, response.PayResult) {
	var (
		err      error
		wallet   model.Wallet
		billFund model.BillFund
		result   response.PayResult
	)
	err = global.MG_DB.Model(&model.Wallet{}).Where("platform = 'bkb' AND user_id = 'bkb'").First(&wallet).Error
	if err != nil {
		return err, result
	}
	billFund.UserID = "bkb"
	billFund.TransactionType = 2
	billFund.TransactionId = "RC" + generate()
	billFund.Title = "recharge"
	billFund.Price = info.Amount
	billFund.Balance = wallet.Fund + info.Amount
	billFund.Platform = "bkb"
	billFund.Status = 1
	tx := global.MG_DB.Begin()
	err = tx.Model(&model.BillFund{}).Create(&billFund).Error
	if err != nil {
		tx.Rollback()
		return err, result
	}
	var payChannel string
	if info.PayMode == 1 {
		payChannel = "paypal"
	}
	attach, _ := json.Marshal(map[string]string{"transactionId": billFund.TransactionId})
	params := api.PayTransRequest{
		Appid:      "bkb5918273465092837",
		Mchid:      "11000001",
		OutTradeNo: billFund.TransactionId,
		Attach:     string(attach),
		NotifyUrl:  global.MG_CONFIG.Paypal.NotifyUrl + "/base/payment/payback",
		Amount:     info.Amount,
		Currency:   "USD",
		PayChannel: payChannel,
		ReturnUrl:  global.MG_CONFIG.Paypal.ReturnUrl,
		CancelUrl:  global.MG_CONFIG.Paypal.CancelUrl,
	}
	payOrder, err := global.PAY_CLIENT.PayTransactionAppUrl(context.Background(), &params)
	if err != nil {
		fmt.Println(err.Error())
		tx.Rollback()
		return errors.New("open " + payChannel + " failed"), result
	}
	err = tx.Model(&model.BillFund{}).Where("id = ?", billFund.ID).UpdateColumn("pay_id", payOrder.PayId).Error
	if err != nil {
		tx.Rollback()
		return err, result
	}
	tx.Commit()
	result.PayChannel = payOrder.PayChannel
	result.PayId = payOrder.PayId
	result.PayReturn = payOrder.PayReturn
	result.PayStatus = payOrder.PayStatus
	return err, result
}

func PaypalCallback(info *dto.PaybackBody) error {
	// 开始交易
	for {
		ok, err := global.MG_REDIS.SetNX("payback-"+info.TransactionId, "used", 10*time.Second).Result()
		if ok && err == nil {
			// 获取成功
			break
		}
	}
	defer func() {
		// 释放锁
		_, _ = utils.RedisDel("payback-" + info.TransactionId)
	}()
	switch info.ResourceType {
	case "pay": // 支付结果
		if info.Status != "SUCCESS" {
			return nil
		} else {
			var (
				err      error
				billFund model.BillFund
			)
			err = global.MG_DB.Model(&model.BillFund{}).Where("transaction_id = ?", info.OutTradeNo).First(&billFund).Error
			if err != nil {
				return err
			}
			tx := global.MG_DB.Begin()
			err = tx.Model(&model.BillFund{}).Where("id = ?", billFund.ID).UpdateColumn("status", 2).Error
			if err != nil {
				tx.Rollback()
				return err
			}
			err = tx.Model(&model.Wallet{}).Where("platform = 'seller' AND user_id = ?", billFund.UserID).UpdateColumn("fund", gorm.Expr("fund + ?", billFund.Price)).Error
			if err != nil {
				tx.Rollback()
				return err
			}
			tx.Commit()
		}
	case "payout": // 提现结果
		var (
			err        error
			status     string
			withdrawal model.Withdrawal
		)
		err = global.MG_DB.Model(&model.Withdrawal{}).Where("flow_no = ?", info.OutTradeNo).First(&withdrawal).Error
		if err != nil {
			return err
		}
		tx := global.MG_DB.Begin()
		if info.Status != "Success" {
			status = "2"
		} else {
			status = "1"
			// 将对应钱包提现状态恢复
			err = tx.Model(&model.Wallet{}).Where("id = ?", withdrawal.CreateBy).UpdateColumn("state", 0).Error
			if err != nil {
				tx.Rollback()
				return err
			}
		}
		err = tx.Model(&model.Withdrawal{}).Where("id = ?", withdrawal.ID).UpdateColumn("status", status).Error
		if err != nil {
			tx.Rollback()
			return err
		}
		tx.Commit()
	}
	return nil
}