package schedule

import (
	"fmt"
	"log"
	"reflect"
	"strings"
	"time"
)

// 获取两个时间点之间的天数
func GetCrossDays(t1,t2 time.Time)(days int){
	var(
		y1,d1,y2,d2 int
		m1,m2 		time.Month
		date1,date2	time.Time
	)

	days = 0
	if t1.Unix() >= t2.Unix() {
		return
	}
	y1,m1,d1 = t1.Date()
	y2,m2,d2 = t2.Date()
	date1 = time.Date(y1, m1, d1, 0, 0, 0, 0, time.UTC)
	date2 = time.Date(y2, m2, d2, 0, 0, 0, 0, time.UTC)
	days = int(date2.Sub(date1).Hours() / 24)
	return
}

// 获取时间点的日期，以年月日字符类型数据返回
func GetYMDString(t time.Time)(ymd string){
	var (
		y1, d1 	int
		m1		time.Month
	)
	y1,m1,d1 = t.Date()
	ymd = fmt.Sprintf("%04d", y1) + fmt.Sprintf("%02d", int(m1)) + fmt.Sprintf("%02d", d1)
	return
}

// 基于时间单位获取秒数
func GetTimeUomSeconds(uomId string)(seconds float64){
	seconds = 0
	switch strings.ToUpper(uomId) {
	case TIME_UOM_WEEK:
		seconds = 7 * 24 * 3600
	case TIME_UOM_DAY:
		seconds = 24 * 3600
	case TIME_UOM_HOUR:
		seconds = 3600
	case TIME_UOM_MINUTE:
		seconds = 60
	case TIME_UOM_SECOND:
		seconds = 1
	}

	return
}

// 设置表的更新时间
func SetTableLastModify(sp interface{},s interface{}, setMode string, lastUser string){
	var (
		hasLastmodify, hasLastuser, hasCreatetime 	bool
	)

	avp := reflect.ValueOf(sp)
	av 	:= reflect.ValueOf(s)
	at 	:= reflect.TypeOf(s)
	// 简单判断下是否为结构体
	if at.Kind() != reflect.Struct {
		log.Printf("s must be a struct")
		return
	}
	// 判断是否有LastModify
	hasLastmodify 	= false
	hasLastuser		= false
	hasCreatetime	= false
	avp = reflect.ValueOf(avp.Interface())

	for i := 0; i < av.NumField(); i++ {
		if at.Field(i).Name == "Lastmodify" {
			hasLastmodify 	= true
		}
		if at.Field(i).Name == "Lastuser" {
			hasLastuser		= true
		}
		if at.Field(i).Name == "Createtime" {
			hasCreatetime	= true
		}
	}
	if hasLastmodify && hasLastuser && hasCreatetime {
		switch setMode {
		case MODIFY_MODE_CREATE:
			f1 := avp.Elem().FieldByName("Createtime")
			f1.Set(reflect.ValueOf(time.Now()))
			f2 := avp.Elem().FieldByName("Lastuser")
			if lastUser != ""{
				f2.Set(reflect.ValueOf(lastUser))
			}else{
				f2.Set(reflect.ValueOf("sys_service"))
			}

		case MODIFY_MODE_UPDATE:
			f1 := avp.Elem().FieldByName("Lastmodify")
			f1.Set(reflect.ValueOf(time.Now()))
			f2 := avp.Elem().FieldByName("Lastuser")
			if lastUser != ""{
				f2.Set(reflect.ValueOf(lastUser))
			}else{
				f2.Set(reflect.ValueOf("sys_service"))
			}

		case MODIFY_MODE_DELETE:
		}
	}
}