package when

import (
	"b612.me/startimer"
	"errors"
	"regexp"
	"strconv"
	"strings"
	"time"
)

func matchPeriodPattern01(base time.Time, str string) (startimer.StarTimer, error) {
	str = transChn(str)
	var rpt startimer.Repeats
	var duration time.Duration
	reg := regexp.MustCompile(`(每隔|每)?(\d{1,4}年)?(\d{1,5}个?月)?(\d{1,4}[明后大]{0,4}[日号天])?([上中下午夜早凌清晨傍晚里]+)?(\d{1,4}个?[点小时钟:]+)?(\d{1,4}[分:])?(\d{1,10}秒?)?(后)?`)
	if reg.MatchString(str) {
		pts := reg.FindStringSubmatch(str)
		var timeParse = pts[5]
		count := 1
		if pts[1] != "" {
			rpt.Every = true
			count = 0
		}
		if pts[2] != "" {
			if !rpt.Every {
				rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_YEAR, Value: uint32(getNumbers(pts[2]))})
			} else {
				duration += time.Hour * 24 * 365 * time.Duration(getNumbers(pts[2]))
			}
		}
		if pts[3] != "" {
			if !rpt.Every {
				rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_MONTH, Value: uint32(getNumbers(pts[3]))})
			} else {
				duration += time.Hour * 24 * 30 * time.Duration(getNumbers(pts[3]))
			}
		}
		if pts[4] != "" {
			now := time.Now()
			switch pts[4] {
			case "明天":
				rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_DAY, Value: uint32(now.Add(time.Hour * 24).Day())})
			case "后天":
				rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_DAY, Value: uint32(now.Add(time.Hour * 48).Day())})
			case "大后天":
				rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_DAY, Value: uint32(now.Add(time.Hour * 72).Day())})
			case "大大后天":
				rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_DAY, Value: uint32(now.Add(time.Hour * 96).Day())})
			default:
				if !rpt.Every {
					rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_DAY, Value: uint32(getNumbers(pts[4]))})
				} else {
					duration += time.Hour * 24 * time.Duration(getNumbers(pts[4]))
				}
			}
		}
		setAsDate := false
		if rpt.Every && timeParse != "" {
			setAsDate = true
		} else if rpt.Every && !strings.Contains(pts[6], "小时") {
			setAsDate = true
			base = time.Date(base.Year(), base.Month(), base.Day(), 0, 0, 0, 0, base.Location())
		}
		var hour uint32
		if pts[6] != "" {
			hour = uint32(getNumbers(pts[6]))
			if timeParse == "下午" || strings.Contains(timeParse, "晚") || strings.Contains(timeParse, "夜") {
				hour += 12
			}
			if !setAsDate && !rpt.Every {
				rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_HOUR, Value: hour})
			} else if rpt.Every && !setAsDate {
				duration += time.Hour * time.Duration(hour)
			} else {
				base.Add(time.Hour * time.Duration(hour))
			}
		} else if timeParse != "" {
			switch timeParse {
			case "上午":
				hour = 9
			case "中午":
				hour = 8
			case "下午":
				hour = 15
			case "傍晚":
				hour = 18
			case "夜里", "晚上", "晚", "夜", "夜晚":
				hour = 21
			case "凌晨":
				hour = 0
			case "清晨":
				hour = 6
			}
			if !setAsDate {
				rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_HOUR, Value: hour})
			} else {
				base.Add(time.Hour * time.Duration(hour))
			}
		}
		if pts[7] != "" {
			if !setAsDate && !rpt.Every {
				rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_MINUTE, Value: uint32(getNumbers(pts[7]))})
			} else if rpt.Every && !setAsDate {
				duration += time.Minute * time.Duration(uint32(getNumbers(pts[7])))
			} else {
				base.Add(time.Minute * time.Duration(uint32(getNumbers(pts[7]))))
			}
		} else if hour != 0 {
			if !rpt.Every && !setAsDate {
				rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_MINUTE, Value: 0})
			}
		}

		if pts[8] != "" {
			if !setAsDate && !rpt.Every {
				rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_SECOND, Value: uint32(getNumbers(pts[8]))})
			} else if rpt.Every && !setAsDate {
				duration += time.Second * time.Duration(uint32(getNumbers(pts[8])))
			} else {
				base.Add(time.Second * time.Duration(uint32(getNumbers(pts[8]))))
			}
		} else if hour != 0 {
			if !rpt.Every && !setAsDate {
				rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_SECOND, Value: 0})
			}
		}
		if pts[9] != "" {
			if rpt.Every {
				return startimer.StarTimer{}, errors.New("Invalid Setences")
			}
			now := time.Now()
			for _, sr := range rpt.Repeat {
				switch sr.Unit {
				case startimer.STAR_YEAR:
					now = now.AddDate(int(sr.Value), 0, 0)
				case startimer.STAR_MONTH:
					now = now.AddDate(0, int(sr.Value), 0)
				case startimer.STAR_DAY:
					now = now.AddDate(0, 0, int(sr.Value))
				case startimer.STAR_HOUR:
					now = now.Add(time.Duration(sr.Value) * time.Hour)
				case startimer.STAR_MINUTE:
					now = now.Add(time.Duration(sr.Value) * time.Minute)
				case startimer.STAR_SECOND:
					now = now.Add(time.Duration(sr.Value) * time.Second)
				}
			}
			return startimer.NewTimer(time.Now(), startimer.WithStaticDate(now), startimer.WithRunCountLimit(count)), nil
		}
		if duration.Seconds() > 0 {
			rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_SECOND, Value: uint32(duration.Seconds())})
		}
		return startimer.NewTimer(base, startimer.WithRepeats(&rpt), startimer.WithRunCountLimit(count)), nil
	}
	return startimer.StarTimer{}, errors.New("no Match")
}

func matchPeroidPattern02(base time.Time, str string) (startimer.StarTimer, error) {
	str = transChn(str)
	var rpt startimer.Repeats
	reg := regexp.MustCompile(`(每)?([周星期礼拜][周礼拜星期到1-6日天]+)+的?([上中下午夜早凌清晨傍晚里]+)?(\d{1,4}[个点时:]+)?(\d{1,4}[分:])?(\d{1,10}秒?)?`)
	if reg.MatchString(str) {
		pts := reg.FindStringSubmatch(str)
		if pts[2] != "" {
			wk := strings.ReplaceAll(pts[2], "周日", "周0")
			wk = strings.ReplaceAll(wk, "礼拜天", "周0")
			wk = strings.ReplaceAll(wk, "星期日", "周0")
			wk = strings.ReplaceAll(wk, "星期天", "周0")
			wk = strings.ReplaceAll(wk, "周天", "周0")
			if strings.Contains(wk, "到") {
				pk := strings.Split(wk, "到")
				startWk := getNumbers(pk[0])
				endWk := getNumbers(pk[1])
				if endWk < startWk {
					endWk += 7
				}
				for i := startWk; i <= endWk; i++ {
					num := i
					if num > 6 {
						num -= 7
					}
					rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_WEEK, Value: uint32(num)})
				}
			}
		}

		timeParse := pts[3]
		var hour uint32
		if pts[4] != "" {
			hour = uint32(getNumbers(pts[4]))
			if timeParse == "下午" || strings.Contains(timeParse, "晚") || strings.Contains(timeParse, "夜") {
				hour += 12
			}
			rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_HOUR, Value: hour})
		} else if timeParse != "" {
			switch timeParse {
			case "上午":
				hour = 9
			case "中午":
				hour = 8
			case "下午":
				hour = 15
			case "傍晚":
				hour = 18
			case "夜里", "晚上", "晚", "夜", "夜晚":
				hour = 21
			case "凌晨":
				hour = 0
			case "清晨":
				hour = 6
			}
			rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_HOUR, Value: hour})
		}
		if pts[5] != "" {
			rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_MINUTE, Value: uint32(getNumbers(pts[5]))})
		} else if hour != 0 {
			rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_MINUTE, Value: 0})
		}
		if pts[6] != "" {
			rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_SECOND, Value: uint32(getNumbers(pts[6]))})
		} else if hour != 0 {
			rpt.Repeat = append(rpt.Repeat, startimer.Repeat{Unit: startimer.STAR_SECOND, Value: 0})
		}
		count := 1
		if pts[1] != "" {
			count = 0
		}
		return startimer.NewTimer(base, startimer.WithRepeats(&rpt), startimer.WithRunCountLimit(count)), nil
	}
	return startimer.StarTimer{}, errors.New("no Match")
}

func WhenWithPeriod(str string) (startimer.StarTimer, error) {
	if match, _ := regexp.MatchString(`(周|星期|礼拜)[一二三四五六天日]`, str); match {
		return matchPeroidPattern02(time.Now(), str)
	}
	return matchPeriodPattern01(time.Now(), str)
}

func transChn(msg string) string {
	var res []rune
	var tmpMap []rune
	keyMap := map[rune]int{
		'零': 0, '一': 1, '二': 2, '三': 3, '四': 4, '五': 5, '六': 6, '七': 7, '八': 8, '九': 9, '十': 10, '百': 100, '千': 1000, '万': 10000, '亿': 100000000, '两': 2, '俩': 2,
	}
	for _, v := range []rune(msg) {
		if _, ok := keyMap[v]; ok {
			tmpMap = append(tmpMap, v)
		} else {
			if len(tmpMap) != 0 {
				res = append(res, []rune(strconv.Itoa(transfer(string(tmpMap))))...)
				tmpMap = []rune{}
			}
			res = append(res, v)
		}
	}
	return string(res)
}
func transfer(msg string) int {
	keyMap := map[rune]int{
		'零': 0, '一': 1, '二': 2, '三': 3, '四': 4, '五': 5, '六': 6, '七': 7, '八': 8, '九': 9, '十': 10, '百': 100, '千': 1000, '万': 10000, '亿': 100000000, '两': 2, '俩': 2,
	}
	result := 0
	secCache := 0
	thrCache := 0
	fKWord := map[rune]int{'百': 100, '千': 1000, '万': 10000, '亿': 100000000}
	for _, num := range []rune(msg) {
		if _, match := fKWord[num]; !match {
			if num == '十' && thrCache != 0 {
				thrCache *= keyMap[num]
			} else {
				thrCache += keyMap[num]
			}
		} else {
			if fKWord[num] < 10000 {
				secCache += thrCache * fKWord[num]
				thrCache = 0
			} else {
				secCache += thrCache
				thrCache = 0
				if secCache == 0 {
					result *= fKWord[num]
					continue
				}
				result += secCache * fKWord[num]
				secCache = 0
			}
		}
	}

	result += secCache + thrCache
	return result
}

func getNumbers(s string) float64 {
	res := ""
	isNegative := false

	for _, c := range s {
		switch {
		case c == '-' && len(res) == 0:
			isNegative = true
		case c >= '0' && c <= '9':
			res += string(c)
		case c == '.' && !strings.Contains(res, "."):
			res += string(c)
		}
	}

	if res == "" {
		return 0
	}

	if isNegative {
		res = "-" + res
	}

	num, _ := strconv.ParseFloat(res, 64)
	return num
}