package biz

import (
	"context"
	"fmt"
	"github.com/go-kratos/kratos/v2/log"
	"github.com/redis/go-redis/v9"
	err2 "voucher/api/err"
	"voucher/internal/biz/bo"
	"voucher/internal/biz/vo"
	"voucher/internal/pkg/lock"
)

func (v *VoucherBiz) order(ctx context.Context, req *bo.OrderCreateReqBo, product *bo.ProductBo) (*bo.OrderBo, error) {

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

	if product.ProductNo == "001" {
		// 压测商品-直接返回
		return order, nil
	}

	// 注册通知标签 order.MerchantNo 批次创建商户, order.BatchNo 商品批次号
	if err = v.registerNotifyTag(ctx, order.MerchantNo, order.BatchNo); err != nil {
		return nil, err
	}

	// 真实发放
	voucherNo, err := v.WechatCpnRepo.Order(ctx, order)
	if err != nil {
		if err3 := v.fail(ctx, order, err.Error()); err3 != nil {
			return nil, err3
		}
		return nil, err
	}

	return order, v.success(ctx, order, voucherNo)
}

func (v *VoucherBiz) orderRetry(ctx context.Context, order *bo.OrderBo) error {

	voucherNo, err := v.WechatCpnRepo.Order(ctx, order)

	if err != nil {
		if err3 := v.fail(ctx, order, err.Error()); err3 != nil {
			return err3
		}
		return err
	}

	return v.success(ctx, order, voucherNo)
}

func (v *VoucherBiz) create(ctx context.Context, req *bo.OrderCreateReqBo, product *bo.ProductBo) (*bo.OrderBo, error) {

	o := &bo.OrderBo{
		OrderNo:     v.GenerateMixRepo.GeneratorString(ctx, fmt.Sprintf("%d%s", req.Type, req.OutBizNo)),
		OutBizNo:    req.OutBizNo,
		ProductNo:   req.ProductNo,
		Account:     req.Account,
		AppID:       req.AppID,
		MerchantNo:  product.MchId,
		Channel:     product.Channel,
		BatchNo:     product.BatchNo,
		NotifyUrl:   req.NotifyUrl,
		AccountType: vo.OrderAccountTypeOpenId,
		Type:        req.Type,
		Status:      vo.OrderStatusIng, // 同步发放，状态至为发放中
		Attach:      req.Attach,
	}

	return v.OrderRepo.Create(ctx, o)
}

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

	c := vo.WechatNotifyRegisterTagCacheKey.BuildCache([]string{v.bc.WechatNotifyMQ.Tag, stockCreatorMchID, stockID})

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

	if err == nil {
		// 缓存存在，直接返回
		return nil
	}

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

	cl := vo.WechatNotifyRegisterTagCacheLockKey.BuildCache([]string{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 && !err2.IsDbNotFound(err) {
			return err
		}

		if wechatNotifyTag != nil {

			if wechatNotifyTag.Tag != v.bc.WechatNotifyMQ.Tag {
				return fmt.Errorf("tag不一致，请检查tag配置:%s", wechatNotifyTag.Tag)
			}

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

	if err := v.rdb.Rdb.Set(ctx, c.Key, wechatNotifyTag.Tag, 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 *VoucherBiz) ing(ctx context.Context, id uint64) error {

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

func (v *VoucherBiz) success(ctx context.Context, order *bo.OrderBo, voucherNo string) error {

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

func (v *VoucherBiz) fail(ctx context.Context, order *bo.OrderBo, remark string) error {

	if err := v.OrderRepo.Fail(ctx, order.ID, remark); err != nil {
		return err
	}

	return v.alarm(ctx, order, remark)
}

func (v *VoucherBiz) alarm(ctx context.Context, order *bo.OrderBo, errMsg string) error {

	// 1小时 内 指定的批次号 发放 发生错误 预警
	c := vo.OrderConsumeFailAlarmKey.BuildCache([]string{order.ProductNo})

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

	if err == nil {
		// 缓存存在，直接返回
		return nil
	}

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

	cl := vo.OrderConsumeFailAlarmLockKey.BuildCache([]string{order.ProductNo})

	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("alarm 二次获取redis缓存%s异常:%v", c.Key, err))
		}

		if len(cacheValue) > 0 {
			return nil // 有直接返回
		}

		// 通知
		if err = v.DingMixRepo.SendMarkdownMessage(ctx, "异常通知", v.alarmText(ctx, order, errMsg)); err != nil {
			return err
		}

		if err = v.rdb.Rdb.Set(ctx, c.Key, order.ProductNo, 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 *VoucherBiz) alarmText(_ context.Context, order *bo.OrderBo, errMsg string) string {

	remarks := fmt.Sprintf("订单号:%s，商品编号:%s,原因:%s", order.OrderNo, order.ProductNo, errMsg)

	msg := "# <font color='green'>" +
		"<h1>立减金发放平台报警通知</h1>" +
		"</font> \n" +
		"<font color='black'>" +
		"不好了，订单发放发生异常了" +
		"[<font color='red'>%s</font>]请尽快处理@相关人员。" +
		"</font>"

	return fmt.Sprintf(msg, remarks)
}

func (v *VoucherBiz) Query(ctx context.Context, order *bo.OrderBo) error {

	status, err := v.WechatCpnRepo.Query(ctx, order)
	if err != nil {
		return err
	}

	if order.Status == status {
		log.Warnf("券状态未改变:%s，忽略不处理,orderNo:%s", order.Status.GetText(), order.OrderNo)
		return nil
	}

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

	order.Status = status

	return nil
}

func (v *VoucherBiz) UpdateOrderStatus(ctx context.Context, orderId uint64, status vo.OrderStatus) error {

	if status.IsSuccess() {

		return v.OrderRepo.Available(ctx, orderId)

	} else if status.IsUse() {

		return v.OrderRepo.Used(ctx, orderId)

	} else if status.IsExpired() {

		return v.OrderRepo.Expired(ctx, orderId)
	}

	return fmt.Errorf("notice 未知券状态,orderId:%d,statuText:%s", orderId, status.GetText())
}