package cmb

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"github.com/go-kratos/kratos/v2/log"
	"github.com/redis/go-redis/v9"
	"gorm.io/gorm"
	"time"
	v1 "voucher/api/v1"
	"voucher/internal/biz/bo"
	"voucher/internal/biz/vo"
	"voucher/internal/pkg/lock"
	"voucher/internal/pkg/uid"
)

func (v *Cmb) OrderConsume(ctx context.Context, order *bo.OrderBo) (outRequestNo string, err error) {

	if !order.Status.IsWait() {
		return outRequestNo, fmt.Errorf("订单状态错误,%s", order.Status.GetText())
	}

	if !order.Channel.IsWeChat() {
		return outRequestNo, fmt.Errorf("订单渠道错误,%s", order.Channel.GetText())
	}

	if err = v.ing(ctx, order.ID); err != nil {
		return
	}

	orderWechat, err := v.create(ctx, order)
	if err != nil {
		return
	}

	if err = v.registerNotifyTag(ctx, orderWechat.StockCreatorMchid, orderWechat.StockID); err != nil {
		return outRequestNo, err
	}

	couponId, err := v.WechatCpnRepo.Order(ctx, orderWechat)
	if err != nil {
		return outRequestNo, v.fail(ctx, order, orderWechat, err.Error())
	}

	if err = v.success(ctx, order, orderWechat, couponId); err != nil {
		return
	}

	return orderWechat.OutRequestNo, err
}

func (v *Cmb) registerNotifyTag(ctx context.Context, stockCreatorMchID, stockID string) error {

	c := vo.WechatNotifyRegisterTagCacheKey.BuildRegisterCache(v.bc.WechatNotifyMQ.Tag, stockCreatorMchID, stockID)
	_, err := v.rdb.Rdb.Get(ctx, c.Key).Result()

	if err == nil {
		return nil
	}

	if err != redis.Nil {
		errMsg := fmt.Sprintf("获取redis缓存%s异常:%v", c.Key, err)
		return fmt.Errorf(errMsg)
	}

	cl := vo.WechatNotifyRegisterTagCacheLockKey.BuildRegisterCache(v.bc.WechatNotifyMQ.Tag, stockCreatorMchID, stockID)

	return lock.NewMutex(v.rdb.Rdb, cl.TTL).Lock(ctx, cl.Key, func(ctx context.Context) error {
		// 二次获取，判定处理，以免获取锁后又执行了一次

		cacheValue, err := v.rdb.Rdb.Get(ctx, c.Key).Result()

		if err != nil && err != redis.Nil {
			return fmt.Errorf(fmt.Sprintf("二次获取redis缓存%s异常:%v", c.Key, err))
		}

		if cacheValue != "" {
			return nil // 有直接返回
		}

		wechatNotifyTag, err := v.WechatNotifyRegisterTagRepo.GetByStockIdAndMchId(ctx, stockCreatorMchID, stockID)
		if err != nil && !errors.Is(err, gorm.ErrRecordNotFound) {
			return err
		}

		if wechatNotifyTag != nil {

			return v.setCache(ctx, c, wechatNotifyTag)
		}

		wechatNotifyTag, err = v.createWechatNotifyRegisterTag(ctx, stockCreatorMchID, stockID)
		if err != nil {
			return err
		}

		if err = v.WechatCpnRepo.RegisterNotifyTag(ctx, stockID); err != nil {
			return v.WechatNotifyRegisterTagRepo.Fail(ctx, wechatNotifyTag.ID, err.Error())
		}

		if err = v.WechatNotifyRegisterTagRepo.Success(ctx, wechatNotifyTag.ID); err != nil {
			return err
		}

		return v.setCache(ctx, c, wechatNotifyTag)
	})
}

func (v *Cmb) createWechatNotifyRegisterTag(ctx context.Context, stockCreatorMchID, stockID string) (*bo.WechatNotifyRegisterTagBo, error) {
	return v.WechatNotifyRegisterTagRepo.Create(ctx, &bo.WechatNotifyRegisterTagBo{
		StockID:           stockID,
		StockCreatorMchID: stockCreatorMchID,
		Tag:               v.bc.WechatNotifyMQ.Tag,
	})
}

func (v *Cmb) setCache(ctx context.Context, c *vo.Cache, wechatNotifyTag *bo.WechatNotifyRegisterTagBo) error {

	cacheValue := fmt.Sprintf("%s_%s_%s", wechatNotifyTag.Tag, wechatNotifyTag.StockCreatorMchID, wechatNotifyTag.StockID)
	if err := v.rdb.Rdb.Set(ctx, c.Key, cacheValue, c.TTL).Err(); err != nil {
		return fmt.Errorf(fmt.Sprintf("设置redis缓存%s异常:%v", c.Key, err))
	}

	return nil
}

func (v *Cmb) create(ctx context.Context, order *bo.OrderBo) (*bo.OrderWechatBo, error) {

	outRequestNo, err := v.GenerateMixRepo.GeneratorString(ctx, uid.OrderWechat)
	if err != nil {
		return nil, err
	}

	req := &bo.OrderWechatBo{
		OrderNo:           order.OrderNo,
		OutRequestNo:      outRequestNo,
		AppID:             order.AppID,
		StockCreatorMchid: order.MerchantNo,
		OpenID:            order.Account,
		StockID:           order.BatchNo,
		Status:            vo.OrderWechatStatusWait,
	}

	orderWechat, err := v.OrderWechatRepo.Create(ctx, req)
	if err != nil {
		return nil, err
	}

	return orderWechat, nil
}

func (v *Cmb) ing(ctx context.Context, id uint64) error {

	return v.OrderRepo.Ing(ctx, id)
}

func (v *Cmb) success(ctx context.Context, order *bo.OrderBo, orderWechat *bo.OrderWechatBo, couponId string) error {

	if err := v.OrderWechatRepo.Success(ctx, orderWechat.ID, couponId); err != nil {
		return err
	}

	return v.OrderRepo.Success(ctx, order.ID)
}

func (v *Cmb) fail(ctx context.Context, order *bo.OrderBo, orderWechat *bo.OrderWechatBo, remarks string) error {

	if err := v.OrderWechatRepo.Fail(ctx, orderWechat.ID, remarks); err != nil {
		return err
	}

	return v.OrderRepo.Fail(ctx, order.ID)
}

func (v *Cmb) orderWechat(ctx context.Context, order *bo.OrderBo, orderOutRequestNo string) (*bo.OrderWechatBo, error) {

	orderWechat, err := v.OrderWechatRepo.GetByOutRequestNo(ctx, orderOutRequestNo)
	if err != nil {
		return nil, err
	}

	if !orderWechat.Status.CanNotify() {
		return nil, fmt.Errorf("微信订单状态错误,不能通知:%s", order.Status.GetText())
	}

	return orderWechat, err
}

func (v *Cmb) bizContent(_ context.Context, orderWechat *bo.OrderWechatBo) (string, error) {

	status, err := orderWechat.Status.GetCmbStatusText()
	if err != nil {
		return "", err
	}

	req := &v1.CmbNotifyRequest{
		Ticket:    orderWechat.OrderNo,
		Status:    status.GetValue(),
		TransDate: time.Now().Format("20060102150405"),
		OrgNo:     v.bc.Cmb.OrgNo,
		Ext:       "",
	}

	bizJsonBytes, err := json.Marshal(req)
	if err != nil {
		return "", err
	}

	return string(bizJsonBytes), nil
}

func (v *Cmb) NotifyConsume(ctx context.Context, order *bo.OrderBo, orderOutRequestNo string) error {

	if !order.Channel.IsWeChat() {
		return fmt.Errorf("暂不支持订单%s渠道%s回调通知处理", order.OrderNo, order.Channel.GetText())
	}

	orderWechat, err := v.orderWechat(ctx, order, orderOutRequestNo)
	if err != nil {
		return err
	}

	bizContent, err := v.bizContent(ctx, orderWechat)
	if err != nil {
		return err
	}

	request, err := v.CmbMixRepo.GetRequest(ctx, &bo.CmbRequestBo{
		FuncName:   vo.CmbNotifyFuncName,
		BizContent: bizContent,
	})
	if err != nil {
		return err
	}

	requestBytes, err := json.Marshal(request)
	if err != nil {
		return err
	}

	orderNotify, err := v.OrderNotifyRepo.Create(ctx, &bo.OrderNotifyBo{
		OrderNo:      orderWechat.OrderNo,
		OutRequestNo: orderWechat.OutRequestNo,
		Request:      string(requestBytes),
		NotifyUrl:    order.NotifyUrl,
	})
	if err != nil {
		return err
	}

	x, err := v.CmbMixRepo.Request(ctx, request, v.bc.Cmb.NotifyUrl)
	if err != nil {
		return v.OrderNotifyRepo.Fail(ctx, orderNotify.ID, err.Error())
	}

	bizStr, err := v.CmbMixRepo.VerifyResponse(ctx, x)
	if err != nil {
		log.Errorf("NotifyConsume CmbMixRepo.VerifyResponse error:%s", err.Error())
		return v.OrderNotifyRepo.Fail(ctx, orderNotify.ID, err.Error())
	}

	var s *v1.CmbNotifyReply
	if err = json.Unmarshal([]byte(bizStr), &s); err != nil {
		return v.OrderNotifyRepo.Fail(ctx, orderNotify.ID, err.Error())
	}

	if s.RespCode != vo.CmbResponseStatusSuccess.GetValue() {
		return v.OrderNotifyRepo.Fail(ctx, orderNotify.ID, s.RespMsg)
	}

	return v.OrderNotifyRepo.Success(ctx, orderNotify.ID, bizStr)
}