package tfelem

import (
	"time"
)

const (
	GFL_ISO8601Date    = "2006-01-02"
	GFL_ISO8601Time    = "15:04:05"
	GFL_ISO8601Full    = "2006-01-02T15:04:05-0700"
	GFL_CommonDatetime = "2006-01-02 15:04:05"
	GFL_NginxDefault   = "02/Jan/2006:15:04:05 -0700"
)

type GoFormatElement struct {
	GoFmtLayout string
}

func (this *GoFormatElement) ExpectedSize() int {
	return len(this.GoFmtLayout)
}

func (this *GoFormatElement) PrintElement(t time.Time) string {
	return t.Format(this.GoFmtLayout)
}

func NewGoFormatElement(layout string) *GoFormatElement {
	return &GoFormatElement{
		GoFmtLayout: layout,
	}
}

func NewISO8601DateElement() *GoFormatElement {
	return &GoFormatElement{
		GoFmtLayout: GFL_ISO8601Date,
	}
}

func NewISO8601TimeElement() *GoFormatElement {
	return &GoFormatElement{
		GoFmtLayout: GFL_ISO8601Time,
	}
}

func NewISO8601FullElement() *GoFormatElement {
	return &GoFormatElement{
		GoFmtLayout: GFL_ISO8601Full,
	}
}

func NewCommonDatetimeElement() *GoFormatElement {
	return &GoFormatElement{
		GoFmtLayout: GFL_CommonDatetime,
	}
}

func NewRFC3339Element() *GoFormatElement {
	return &GoFormatElement{
		GoFmtLayout: time.RFC3339,
	}
}

func NewRFC3339NanoElement() *GoFormatElement {
	return &GoFormatElement{
		GoFmtLayout: time.RFC3339Nano,
	}
}

func NewNginxDefaultElement() *GoFormatElement {
	return &GoFormatElement{
		GoFmtLayout: GFL_NginxDefault,
	}
}