package service

import (
	"errors"
	"fmt"
	"github.com/spf13/cast"
	"gorm.io/gorm"
	"strings"
	"time"
	"wms/constvar"
	"wms/models"
)

type SystemConfigService struct {
}

func NewSystemConfigService() *SystemConfigService {
	return &SystemConfigService{}
}

func (slf SystemConfigService) ParamsCheck(params models.SystemConfig) (err error) {
	var oldRecord *models.SystemConfig
	if params.Id != 0 {
		oldRecord, err = models.NewSystemConfigSearch().SetID(params.ID).First()
		if err == gorm.ErrRecordNotFound {
			return errors.New("配置不存在")
		}
	}
	if oldRecord == nil || params.ConfigType != oldRecord.ConfigType {
		_, err = models.NewSystemConfigSearch().SetConfigType(params.ConfigType).First()
		if err != gorm.ErrRecordNotFound {
			return errors.New("配置项重复")
		}
	}

	switch params.ConfigType {
	case constvar.SystemConfigTypeInventoryCutOffPoint:
		_, _, err = slf.CheckInventoryCutOffPoint(params.Val)
		if err != nil {
			return err
		}
	}

	return nil
}

func (slf SystemConfigService) CheckInventoryCutOffPoint(val string) (day int, timeStr string, err error) {
	if !strings.Contains(val, "-") {
		err = errors.New("库存结算时间点应该用分隔符'-'分隔日期和时间")
		return
	}
	arr := strings.Split(val, "-")
	if len(arr) != 2 {
		err = errors.New("库存结算时间点应该用分隔符'-'分隔日期和时间，且只能有一个分隔符")
		return
	}
	day = cast.ToInt(arr[0])
	if day < 0 || day > 28 {
		err = errors.New("库存结算时间点日期不正确，应在1~28之间")
		return
	}
	timeStr = arr[1]
	_, err = time.ParseInLocation("15:04", arr[1], time.Local)
	return
}

func (slf SystemConfigService) GetInventoryCutOffPoint() (day int, timeStr string, err error) {
	config, err := models.NewSystemConfigSearch().SetConfigType(constvar.SystemConfigTypeInventoryCutOffPoint).First()
	if err == gorm.ErrRecordNotFound {
		config = &models.SystemConfig{
			Val: "01-00:01",
		}
	}
	if err != nil && err != gorm.ErrRecordNotFound {
		return
	}
	return slf.CheckInventoryCutOffPoint(config.Val)
}

func (slf SystemConfigService) GetInventoryCutOffTime() (beginTime, endTime time.Time, err error) {
	day, timeStr, err := slf.GetInventoryCutOffPoint()
	// 假设当前时间
	currentTime := time.Now()
	// 解析给定的时间字符串为 time 对象
	parsedTime, err := time.Parse("15:04", timeStr)
	if err != nil {
		fmt.Println("时间解析错误:", err)
		return
	}

	// 创建一个日期时间对象，假设在当前月的给定日和时间
	endTime = time.Date(currentTime.Year(), currentTime.Month(), day, parsedTime.Hour(), parsedTime.Minute(), 0, 0, currentTime.Location())

	// 如果给定的日期时间在当前时间之后，我们需要回到上个月
	if endTime.After(currentTime) {
		lastMonth := currentTime.AddDate(0, -1, 0)
		endTime = time.Date(lastMonth.Year(), lastMonth.Month(), day, parsedTime.Hour(), parsedTime.Minute(), 0, 0, currentTime.Location())
	}
	lastMonth := endTime.AddDate(0, -1, 0)
	beginTime = time.Date(lastMonth.Year(), lastMonth.Month(), day, parsedTime.Hour(), parsedTime.Minute(), 0, 0, currentTime.Location())
	return beginTime, endTime, nil
}