package convert

import (
	"database/sql"
	"strconv"
	"time"
)

const (
	// TimeFormat 默认的时间格式
	TimeFormat = "2006-01-02 15:04:05"
)

// Time2String time.Time to string
func Time2String(t time.Time) string {
	return t.Format(TimeFormat)
}

// String2Time string to time.Time
func String2Time(s string) (time.Time, error) {
	return time.ParseInLocation(TimeFormat, s, time.Local)
}

// String2Int string to int
func String2Int(s string) (int, error) {
	return strconv.Atoi(s)
}

// String2Int64 string to int64
func String2Int64(s string) (int64, error) {
	return strconv.ParseInt(s, 10, 64)
}

// String2Uint string to uint
func String2Uint(s string) (uint, error) {
	val, err := strconv.ParseUint(s, 10, 0) // 0 表示使用 int 的大小
	if err != nil {
		return 0, err
	}
	return uint(val), nil
}

// String2Uint64 string to uint64
func String2Uint64(s string) (uint64, error) {
	return strconv.ParseUint(s, 10, 64)
}

// Int2String int to string
func Int2String(i int) string {
	return strconv.Itoa(i)
}

// Int642String int64 to string
func Int642String(i int64) string {
	return strconv.FormatInt(i, 10)
}

// Uint2String uint to string
func Uint2String(i uint) string {
	return strconv.FormatUint(uint64(i), 10)
}

// Uint642String uint64 to string
func Uint642String(i uint64) string {
	return strconv.FormatUint(i, 10)
}

// NullTime2String sql.NullTime to string
func NullTime2String(nt sql.NullTime) string {
	if nt.Valid {
		return Time2String(nt.Time)
	}
	return ""
}