package policy

import (
	"fmt"
	"time"
)

type Time struct {
	Hour   int
	Minute int
	Second int
}

func (t Time) Eq(other Time) bool {
	return t.Hour == other.Hour && t.Minute == other.Minute && t.Second == other.Second
}

func (t Time) After(other Time) bool {
	return t.Seconds() > other.Seconds()
}

func (t Time) Before(other Time) bool {
	return t.Seconds() < other.Seconds()
}

func (t Time) Seconds() int {
	return t.Hour*3600 + t.Minute*60 + t.Second
}

func (t Time) MarshalJSON() ([]byte, error) {
	return []byte(fmt.Sprintf(`"%02d:%02d:%02d"`, t.Hour, t.Minute, t.Second)), nil
}

var timeFormats = []string{
	time.TimeOnly,
	"15:04",
	time.Kitchen,
}

func Now() Time {
	now := time.Now()
	return Time{now.Hour(), now.Minute(), now.Second()}
}

func ParseTime(s string) (t Time, err error) {
	var tt time.Time
	for _, layout := range timeFormats {
		if tt, err = time.Parse(layout, s); err == nil {
			return Time{tt.Hour(), tt.Minute(), tt.Second()}, nil
		}
	}
	return Time{}, fmt.Errorf("time: invalid time %q", s)
}