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

package charge

import (
	"context"
	"encoding/json"
	"fmt"
	"git.getensh.com/common/gopkgs/database"
	"git.getensh.com/common/gopkgs/logger"
	"go.uber.org/zap"
	"google.golang.org/grpc/status"
	"gorm.io/gorm"
	"property-garden/errors"
	"property-garden/impl/v1/charge_utils"
	"property-garden/impl/v1/fee"
	dbmodel "property-garden/model"
	pb_v1 "property-garden/pb/v1"
	"property-garden/utils"
)



func checkChargeGenerateBillParam(req *pb_v1.ChargeGenerateBillRequest) error {
	switch {
	case req.GardenId == 0:
		return status.Error(10003, "小区不能为空")
	case req.BindId == 0:
		return status.Error(10003, "关系id不能为空")
	}

	return nil

}

func generatePowerBill(bind *dbmodel.TChargeBind, chargeInfo *dbmodel.TChargeConf, dbname string) error {
	p := dbmodel.NewChargePower(dbname)
	where := map[string]interface{}{
		"charge_type":bind.ChargeType,
		"house_id":bind.ObjId,
		"bill_id":0,
	}
	list, err := p.List(database.DB(), where, nil, -1, -1)
	if err != nil {
		return errors.DataBaseError
	}
	if len(list) == 0 {
		return status.Error(10003, "无账单可生成")
	}
	house := dbmodel.NewHouseUnitBuilding(dbname)
	where = map[string]interface{}{
		"id":bind.ObjId,
	}
	err = house.Find(database.DB(), where)
	if err != nil && err != gorm.ErrRecordNotFound{
		return errors.DataBaseError
	}
	if house.ID == 0 {
		return status.Error(10003, "房屋已被删除")
	}
	db := database.DB().Begin()
	for i, _ := range list {
		param := &BillAddParam{
			HouseInfo:house,
			PowerInfo:&list[i],
			VehicleInfo: nil,
			SpaceInfo: nil,
			ChargeInfo: chargeInfo,
			BindInfo: bind,
			ObjType: charge_utils.ObjTypeHouse,
		}
		err = BillAddHousePower(param, db, dbname)
		if err != nil {
			db.Rollback()
			return  err
		}
	}
	db.Commit()
	return nil

}

func ChargeGenerateBill(ctx context.Context, req *pb_v1.ChargeGenerateBillRequest) (reply *pb_v1.ChargeGenerateBillReply, err error) {

	reply = &pb_v1.ChargeGenerateBillReply{}

	// 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 = checkChargeGenerateBillParam(req)
	if err != nil {
		return nil, err
	}
	dbname := utils.GetGardenDbName(req.GardenId)

	bind := dbmodel.NewChargeBind(dbname)

	where := map[string]interface{}{
		"id":req.BindId,
	}
	err = bind.Find(database.DB(), where)
	if err != nil && err != gorm.ErrRecordNotFound{
		return nil, errors.DataBaseError
	}
	if bind.ID == 0 {
		return nil, errors.ErrRecordNotFound
	}

	chargeInfo := dbmodel.NewChargeConf(dbname)

	where = map[string]interface{}{
		"id":bind.ChargeId,
	}
	err = chargeInfo.Find(database.DB(), where)
	if err != nil && err != gorm.ErrRecordNotFound{
		return nil, errors.DataBaseError
	}
	if chargeInfo.ID == 0 {
		return nil, errors.ErrRecordNotFound
	}


	if bind.ChargeType == charge_utils.ChargeTypeVehicle {
		return nil, status.Error(10003, "车辆费用不能手动生成账单")
	}
	if chargeInfo.ChargeTimeType == charge_utils.ChargeTimeTypeOne {
		return nil, status.Error(10003, "一次性费用不能手动生成账单")
	}
	if charge_utils.IsPowerChargeType[bind.ChargeType] {
		return reply, generatePowerBill(bind, chargeInfo, dbname)
	}
	//周期性费用
	mreq := pb_v1.GenerateBillRequest{
		GardenId:req.GardenId,
		ChargeBindId:req.BindId,
		EndTime:req.End,
	}
	_, err = fee.GenerateBill(ctx, &mreq)
	if err != nil {
		return nil, err
	}

	return reply, nil
}