// 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"
	"property-garden/errors"
	"property-garden/impl/v1/charge_utils"
	dbmodel "property-garden/model"
	pb_v1 "property-garden/pb/v1"
	"property-garden/utils"
	"time"
)

func checkChargeBillListParam(req *pb_v1.ChargeBillListRequest) 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")
	}
	if req.Page == 0 {
		req.Page = 1
	}
	if req.PageSize == 0 {
		req.PageSize = 10
	}
	return nil

}

func GetBindChargeBillTotalFee(bindId int64, chargeInfoM map[int64]dbmodel.TChargeConf, dbname string) (int64, error) {
	p := dbmodel.NewChargeBill(dbname)
	where := map[string]interface{}{
		"charge_bind_id": bindId,
	}
	page := 1
	ret := int64(0)
	for {
		list, err := p.List(database.DB(), where, nil, page, 10, "")
		if err != nil {
			return 0, errors.DataBaseError
		}
		if len(list) == 0 {
			return ret, nil
		}
		for _, v := range list {
			chargeInfo := chargeInfoM[v.ChargeId]
			ret += v.Amount
			lfee, _ := charge_utils.GetLateFee(v.Amount, v.ChargeEnd, &chargeInfo)
			ret += lfee
		}
		if len(list) < 10 {
			break
		}
	}
	return ret, nil
}

func ChargeBillList(ctx context.Context, req *pb_v1.ChargeBillListRequest) (reply *pb_v1.ChargeBillListReply, err error) {

	reply = &pb_v1.ChargeBillListReply{}

	// 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 = checkChargeBillListParam(req)
	if err != nil {
		return nil, err
	}
	dbname := utils.GetGardenDbName(req.GardenId)
	chargeInfoM, err := charge_utils.GetAllChargeInfos(dbname)
	if err != nil {
		return nil, err
	}
	bill := dbmodel.NewChargeBill(dbname)
	where := map[string]interface{}{
		"charge_bind_id": req.BindId,
	}
	if req.Status > 0 {
		where["status"] = req.Status
	}

	// 账单数量
	reply.Total, err = bill.Count(database.DB(), where, nil)
	if err != nil {
		return nil, errors.DataBaseError
	}
	if reply.Total == 0 {
		return reply, nil
	}

	// 总的代缴费用包含滞纳金
	reply.ShouldPayAmount, err = GetBindChargeBillTotalFee(req.BindId, chargeInfoM, dbname)
	if err != nil {
		return nil, err
	}
	reply.Page = req.Page

	// 账单列表
	list, err := bill.List(database.DB(), where, nil, int(req.Page), int(req.PageSize), "")
	if err != nil {
		return nil, errors.DataBaseError
	}
	reply.List = make([]*pb_v1.ChargeBillItem, len(list))
	chargeIds := []int64{}
	for _, v := range list {
		chargeIds = append(chargeIds, v.ChargeId)
	}

	for i, v := range list {
		chargeInfo := chargeInfoM[v.ChargeId]
		chargeDesc := dbmodel.ChargeDesc{}
		json.Unmarshal([]byte(v.ChargeDesc), &chargeDesc)
		latefee, lateDays := charge_utils.GetLateFee(v.Amount, v.ChargeEnd, &chargeInfo)
		item := &pb_v1.ChargeBillItem{
			Start:       time.Unix(v.ChargeStart, 0).Format("2006-01-02"),
			End:         time.Unix(v.ChargeEnd, 0).Format("2006-01-02"),
			ChargeType:  v.ChargeType,
			ChargeName:  v.ChargeName,
			Amount:      v.Amount,
			LastUsed:    chargeDesc.PowerLastUsed,
			CurrentUsed: chargeDesc.PowerCurrentUsed,
			LateFee:     latefee,
			LateDays:    lateDays,
			BillId:      v.ID,
			ChargeDesc:  charge_utils.GetChargeDesc(chargeDesc),
		}

		if i == 0 {
			reply.ChargeName = v.ChargeName
			reply.ChargeType = v.ChargeType
		}
		reply.List[i] = item
	}

	return reply, nil
}