package pay

import (
	"context"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"github.com/pkg/errors"
	"github.com/zeromicro/go-zero/core/logx"
	"github.com/zeromicro/go-zero/core/stores/sqlx"
	"tydata-server/app/user/cmd/api/internal/svc"
	"tydata-server/app/user/cmd/api/internal/types"
	"tydata-server/app/user/model"
	"tydata-server/common/ctxdata"
	"tydata-server/common/xerr"
	"tydata-server/pkg/lzkit/crypto"
)

type PaymentLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewPaymentLogic(ctx context.Context, svcCtx *svc.ServiceContext) *PaymentLogic {
	return &PaymentLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *PaymentLogic) Payment(req *types.PaymentReq) (resp *types.PaymentResp, err error) {
	userID, getUidErr := ctxdata.GetUidFromCtx(l.ctx)
	if getUidErr != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "生成订单, 获取用户信息失败, %+v", getUidErr)
	}

	brand, ok := l.ctx.Value("brand").(string)
	if !ok {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "生成订单, 获取平台失败, %+v", getUidErr)
	}
	redisKey := fmt.Sprintf("%d:%s", userID, req.Id)
	cache, cacheErr := l.svcCtx.Redis.GetCtx(l.ctx, redisKey)
	if cacheErr != nil {
		return nil, cacheErr
	}
	var data types.QueryCacheLoad
	err = json.Unmarshal([]byte(cache), &data)
	if err != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "生成订单, 解析缓存内容失败, %+v", err)
	}

	product, err := l.svcCtx.ProductModel.FindOneByProductEn(l.ctx, data.Product)
	if err != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "生成订单, 查找产品错误: %+v", err)
	}
	secretKey := l.svcCtx.Config.Encrypt.SecretKey
	key, decodeErr := hex.DecodeString(secretKey)
	if decodeErr != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "生成订单, 获取AES密钥失败: %+v", decodeErr)
	}
	params, marshalErr := json.Marshal(data.Params)
	if marshalErr != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "生成订单, 序列化参数失败: %+v", marshalErr)
	}
	encryptParams, aesEncryptErr := crypto.AesEncrypt(params, key)
	if aesEncryptErr != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "生成订单, 加密参数失败: %+v", aesEncryptErr)
	}
	var prepayData interface{}
	var outTradeNo string
	var amount float64
	user, err := l.svcCtx.UserModel.FindOne(l.ctx, userID)
	if err != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DB_ERROR), "生成订单, 获取用户信息失败: %+v", err)
	}

	if user.Inside == 1 {
		amount = 0.01
	} else {
		amount = product.SellPrice
	}
	var createOrderErr error
	if req.PayMethod == "wechatpay" {
		outTradeNo = l.svcCtx.WechatPayService.GenerateOutTradeNo()
		prepayData, createOrderErr = l.svcCtx.WechatPayService.CreateWechatOrder(l.ctx, amount, product.ProductName, outTradeNo)
	} else if req.PayMethod == "alipay" {
		outTradeNo = l.svcCtx.AlipayService.GenerateOutTradeNo()
		prepayData, createOrderErr = l.svcCtx.AlipayService.CreateAlipayOrder(l.ctx, amount, product.ProductName, outTradeNo, brand)
	} else if req.PayMethod == "appleiap" {
		outTradeNo = l.svcCtx.ApplePayService.GenerateOutTradeNo()
		prepayData = l.svcCtx.ApplePayService.GetIappayAppID(product.ProductEn)
	}
	if createOrderErr != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "生成订单, 创建支付订单失败: %+v", createOrderErr)
	}
	var orderID int64
	transErr := l.svcCtx.OrderModel.Trans(l.ctx, func(ctx context.Context, session sqlx.Session) error {
		order := model.Order{
			OrderNo:         outTradeNo,
			UserId:          userID,
			ProductId:       product.Id,
			PaymentPlatform: req.PayMethod,
			PaymentScene:    "app",
			Amount:          amount,
			Status:          "pending",
		}
		orderInsertResult, insertOrderErr := l.svcCtx.OrderModel.Insert(ctx, session, &order)
		if insertOrderErr != nil {
			return errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "生成订单, 保存订单失败: %+v", insertOrderErr)
		}
		insertedOrderID, lastInsertIdErr := orderInsertResult.LastInsertId()
		if lastInsertIdErr != nil {
			return errors.Wrapf(xerr.NewErrCode(xerr.SERVER_COMMON_ERROR), "生成订单, 获取保存订单ID失败: %+v", lastInsertIdErr)
		}
		orderID = insertedOrderID
		query := model.Query{
			OrderId:     orderID,
			UserId:      userID,
			ProductId:   product.Id,
			QueryParams: encryptParams,
			QueryState:  "pending",
		}
		_, insertQueryErr := l.svcCtx.QueryModel.Insert(l.ctx, session, &query)
		if insertQueryErr != nil {
			return insertQueryErr
		}
		return nil
	})
	if transErr != nil {
		return nil, transErr
	}

	switch v := prepayData.(type) {
	case string:
		// 如果 prepayData 是字符串类型，直接返回
		return &types.PaymentResp{PrepayId: v, OrderID: orderID}, nil
	default:
		return &types.PaymentResp{PrepayData: prepayData, OrderID: orderID}, nil
	}
}