package curl2info

import (
	"errors"
	"fmt"
	"regexp"
	"strconv"
	"strings"
	"testing"

	"github.com/davecgh/go-spew/spew"
)

type TimePointer struct {
	left, right           int
	leftlimit, rightlimit int
	per                   int
}

func (tp *TimePointer) String() string {
	return fmt.Sprintf("left: %d, right: %d, leftlimit: %d, rightlimit: %d, per: %d", tp.left, tp.right, tp.leftlimit, tp.rightlimit, tp.per)
}

type Crontab struct {
	Min   []TimePointer
	Hour  []TimePointer
	Day   []TimePointer
	Month []TimePointer
	Week  []TimePointer

	logMissedTime bool
}

func NewCrontab(crontab string) *Crontab {
	cron := &Crontab{}
	cron.FromString(crontab)
	return cron
}

func (cron *Crontab) SetMissedLog(missedlog bool) {
	cron.logMissedTime = missedlog
}

func (cron *Crontab) TimeUp() bool {
	return false
}

func (cron *Crontab) String() string {
	return fmt.Sprintf("min:%s\nhour:%s\nday:%s\nmonth:%s\nweek:%s\n", spew.Sdump(cron.Min), spew.Sdump(cron.Hour), spew.Sdump(cron.Day), spew.Sdump(cron.Month), spew.Sdump(cron.Week))
}

func (cron *Crontab) FromString(crontab string) error {
	crontab = strings.TrimSpace(crontab)

	matches := regexp.MustCompile("[^ ]+").FindAllString(crontab, -1)
	mlen := len(matches)
	switch mlen {
	case 5:
		cron.Min = createTimePointer(matches[0], 0, 59)
		cron.Hour = createTimePointer(matches[1], 0, 23)
		cron.Day = createTimePointer(matches[2], 1, 31)
		cron.Month = createTimePointer(matches[3], 1, 12)
		cron.Week = createTimePointer(matches[4], 1, 7)
	default:
		return errors.New("mathches len != 5, check crontab string")
	}
	return nil
}

func createTimePointer(min string, llimit, rlimit int) []TimePointer {

	var result []TimePointer

	exelist := strings.Split(min, ",")
	for _, exe := range exelist {
		tp := TimePointer{}

		takeper := strings.Split(exe, "/") // per
		var rangevalue, per string
		if len(takeper) == 1 {
			rangevalue = exe
			per = "0"
		} else {
			rangevalue = takeper[0]
			per = takeper[1]
		}
		// takeRange
		be := strings.Split(rangevalue, "-")
		var left, rigth string
		switch len(be) {
		case 1:
			left = be[0]
			rigth = be[0]
		case 2:
			left = be[0]
			rigth = be[1]
		default:
			panic(errors.New("range value is > 2"))
		}

		if left == "*" {
			tp.left = llimit
		} else {
			ileft, err := strconv.Atoi(strings.Replace(left, "^", "-", -1))
			if err != nil {
				panic(err)
			}
			tp.left = ileft
		}

		if rigth == "*" {
			tp.right = rlimit
		} else {
			iright, err := strconv.Atoi(strings.Replace(rigth, "^", "-", -1))
			if err != nil {
				panic(err)
			}
			tp.right = iright
		}

		iper, err := strconv.Atoi(per)
		if err != nil {
			panic(err)
		}
		tp.per = iper
		tp.leftlimit = llimit
		tp.rightlimit = rlimit

		result = append(result, tp)
	}

	return result
}

func TestParseCrontab(t *testing.T) {
	crontab := "0-5/2,7-30/3,30,35,40-^1 * * * *" //(秒) 分 时 号(每月的多少号, 要注意月可可能性)  星期几(每个星期的) /每 ,列表 -范围

	t.Error(NewCrontab(crontab))
}