// Copyright 2019 getensh.com. All rights reserved.
// Use of this source code is governed by getensh.com.

package statistic

import (
	"context"
	"encoding/json"
	"fmt"
	"git.getensh.com/common/gopkgs/database"
	"gorm.io/gorm"
	"property-garden/errors"
	dbmodel "property-garden/model"
	"property-garden/pb"
	pb_v1 "property-garden/pb/v1"
	"property-garden/utils"
	"time"

	"git.getensh.com/common/gopkgs/logger"
	"go.uber.org/zap"
	"google.golang.org/grpc/status"
)

const (
	ObjTypeHouse   = 1
	ObjTypeSpace   = 2
	ObjTypeVehicle = 3
	ObjTypeUser    = 4
)

func checkObjStatisticSetParam(req *pb_v1.ObjStatisticSetRequest) error {

	switch {
	case req.GardenId == 0:
		return status.Error(10003, "小区不能为空")
	case req.ObjType == 0:
		return status.Error(10003, "类型不能为空")
	}
	return nil
}

func ObjStatisticSetWithDb(req *pb_v1.ObjStatisticSetRequest, db *gorm.DB) error {
	now := time.Now()
	dbname := utils.GetGardenDbName(req.GardenId)

	where := map[string]interface{}{
		"obj_type": req.ObjType,
	}
	values := map[string]interface{}{}
	if req.TotalIncrease > 0 {
		values["total"] = gorm.Expr("total + ?", req.TotalIncrease)
	} else if req.TotalIncrease < 0 {
		values["total"] = gorm.Expr("total - ?", 0-req.TotalIncrease)
	}

	if len(values) == 0 {
		return nil
	}
	p := dbmodel.NewStatisticObj(dbname)
	affected, err := p.UpdateAffected(db, where, values)
	if err != nil {
		return errors.DataBaseError
	}
	if affected > 0 {
		if req.ObjType != ObjTypeVehicle {
			mreq := pb_v1.CompanyObjStatisticSetRequest{GardenId: req.GardenId, ObjType: req.ObjType, TotalIncrease: req.TotalIncrease}
			_, err := pb.Company.CompanyObjStatisticSet(context.Background(), &mreq)
			if err != nil {
				return err
			}
		}
		return nil
	}
	p.ObjType = req.ObjType
	p.CreatedAt = now
	p.UpdatedAt = now

	p.Total = req.TotalIncrease

	err = p.Insert(db)
	if err != nil {
		return errors.DataBaseError
	}
	if req.ObjType != ObjTypeVehicle {
		mreq := pb_v1.CompanyObjStatisticSetRequest{GardenId: req.GardenId, ObjType: req.ObjType, TotalIncrease: req.TotalIncrease}
		_, err := pb.Company.CompanyObjStatisticSet(context.Background(), &mreq)
		if err != nil {
			return err
		}
	}
	return nil

}

func ObjStatisticSet(ctx context.Context, req *pb_v1.ObjStatisticSetRequest) (reply *pb_v1.ObjStatisticSetReply, err error) {

	reply = &pb_v1.ObjStatisticSetReply{}

	// 捕获各个task中的异常并返回给调用者
	defer func() {
		if r := recover(); r != nil {
			err = fmt.Errorf("%+v", r)
			e := &status.Status{}
			if er := json.Unmarshal([]byte(err.Error()), e); er != nil {
				logger.Error("err",
					zap.String("system_err", err.Error()),
					zap.Stack("stacktrace"))
			}
		}
	}()
	// 参数检查
	err = checkObjStatisticSetParam(req)
	if err != nil {
		return nil, err
	}
	db := database.DB().Begin()
	err = ObjStatisticSetWithDb(req, db)
	if err != nil {
		db.Rollback()
		return nil, err
	}
	db.Commit()
	return reply, err
}