package modes

import (
	"regexp"
	"strings"

	"github.com/user/flexdxcluster2/internal/bands"
)

type ModeRange struct {
	MinFreqMHz float64
	MaxFreqMHz float64
	Mode       string
}

var BandModeRanges = map[string][]ModeRange{
	"160M": {
		{1.800, 1.838, "CW"},
		{1.838, 1.843, "FT8"},
		{1.843, 2.000, "LSB"},
	},
	"80M": {
		{3.500, 3.560, "CW"},
		{3.560, 3.575, "FT8"},
		{3.575, 3.578, "FT4"},
		{3.578, 3.590, "RTTY"},
		{3.590, 3.800, "LSB"},
	},
	"60M": {
		{5.330, 5.357, "CW"},
		{5.357, 5.359, "FT8"},
		{5.359, 5.405, "USB"},
	},
	"40M": {
		{7.000, 7.040, "CW"},
		{7.040, 7.047, "RTTY"},
		{7.047, 7.050, "FT4"},
		{7.050, 7.100, "FT8"},
		{7.100, 7.300, "LSB"},
	},
	"30M": {
		{10.100, 10.130, "CW"},
		{10.130, 10.142, "FT8"},
		{10.142, 10.150, "FT4"},
	},
	"20M": {
		{14.000, 14.070, "CW"},
		{14.070, 14.078, "FT8"},
		{14.078, 14.083, "FT4"},
		{14.083, 14.100, "FT8"},
		{14.100, 14.112, "RTTY"},
		{14.112, 14.350, "USB"},
	},
	"17M": {
		{18.068, 18.090, "CW"},
		{18.090, 18.104, "FT8"},
		{18.104, 18.106, "FT4"},
		{18.106, 18.110, "FT8"},
		{18.110, 18.168, "USB"},
	},
	"15M": {
		{21.000, 21.070, "CW"},
		{21.070, 21.100, "FT8"},
		{21.100, 21.130, "RTTY"},
		{21.130, 21.143, "FT4"},
		{21.143, 21.450, "USB"},
	},
	"12M": {
		{24.890, 24.910, "CW"},
		{24.910, 24.918, "FT8"},
		{24.918, 24.930, "FT4"},
		{24.930, 24.990, "USB"},
	},
	"10M": {
		{28.000, 28.070, "CW"},
		{28.070, 28.110, "FT8"},
		{28.110, 28.179, "RTTY"},
		{28.179, 28.190, "FT4"},
		{28.190, 29.000, "USB"},
		{29.000, 29.700, "FM"},
	},
	"6M": {
		{50.000, 50.100, "CW"},
		{50.100, 50.313, "USB"},
		{50.313, 50.318, "FT8"},
		{50.318, 50.323, "FT4"},
		{50.323, 51.000, "USB"},
		{51.000, 54.000, "FM"},
	},
	"QO-100": {
		{10489.500, 10489.540, "CW"},
		{10489.540, 10489.650, "FT8"},
		{10489.650, 10489.990, "USB"},
	},
}

func GuessMode(freqMHz float64) string {
	band := bands.FrequencyToBand(freqMHz)
	if band == "N/A" {
		if freqMHz < 10.0 {
			return "LSB"
		}
		return "USB"
	}
	return GuessModeForBand(freqMHz, band)
}

func GuessModeForBand(freqMHz float64, band string) string {
	ranges, exists := BandModeRanges[band]
	if !exists {
		if bands.IsUSBBand(band) {
			return "USB"
		}
		return "LSB"
	}
	for _, r := range ranges {
		if freqMHz >= r.MinFreqMHz && freqMHz < r.MaxFreqMHz {
			return r.Mode
		}
	}
	if bands.IsUSBBand(band) {
		return "USB"
	}
	return "LSB"
}

func ExtractModeFromComment(comment string) string {
	if comment == "" {
		return ""
	}
	commentUpper := strings.ToUpper(comment)

	if strings.Contains(commentUpper, "FT8") ||
		(strings.Contains(commentUpper, "DB") && strings.Contains(commentUpper, "HZ")) {
		return "FT8"
	}
	if strings.Contains(commentUpper, "FT4") {
		return "FT4"
	}
	if strings.Contains(commentUpper, "WPM") || strings.Contains(commentUpper, " CW ") ||
		strings.HasSuffix(commentUpper, "CW") || strings.HasPrefix(commentUpper, "CW ") {
		return "CW"
	}

	digitalModes := []string{"RTTY", "PSK31", "PSK63", "PSK", "MFSK", "OLIVIA", "JT65", "JT9"}
	for _, mode := range digitalModes {
		if strings.Contains(commentUpper, mode) {
			return mode
		}
	}

	voiceModes := []string{"USB", "LSB", "SSB", "FM", "AM"}
	for _, mode := range voiceModes {
		if strings.Contains(commentUpper, " "+mode+" ") ||
			strings.HasPrefix(commentUpper, mode+" ") ||
			strings.HasSuffix(commentUpper, " "+mode) ||
			commentUpper == mode {
			return mode
		}
	}
	return ""
}

// DetermineMode — priorité : mode explicite > commentaire > fréquence
func DetermineMode(explicitMode string, comment string, freqMHz float64) string {
	if explicitMode != "" {
		explicitMode = strings.ToUpper(explicitMode)
		if explicitMode == "SSB" {
			return bands.NormalizeSSBModeByFrequency(explicitMode, freqMHz)
		}
		return explicitMode
	}

	modeFromComment := ExtractModeFromComment(comment)
	if modeFromComment != "" {
		if modeFromComment == "SSB" {
			return bands.NormalizeSSBModeByFrequency(modeFromComment, freqMHz)
		}
		return modeFromComment
	}

	return GuessMode(freqMHz)
}

func IsCWMode(mode string) bool        { return strings.ToUpper(mode) == "CW" }
func IsSSBMode(mode string) bool {
	m := strings.ToUpper(mode)
	return m == "SSB" || m == "USB" || m == "LSB"
}
func IsDigitalMode(mode string) bool {
	m := strings.ToUpper(mode)
	for _, dm := range []string{"FT8", "FT4", "RTTY", "PSK31", "PSK63", "PSK", "MFSK", "OLIVIA", "JT65", "JT9"} {
		if m == dm {
			return true
		}
	}
	return false
}
func IsPhoneMode(mode string) bool {
	m := strings.ToUpper(mode)
	for _, pm := range []string{"SSB", "USB", "LSB", "FM", "AM"} {
		if m == pm {
			return true
		}
	}
	return false
}

func ParseModeFromRawSpot(rawSpot string) string {
	re := regexp.MustCompile(`\b(CW|SSB|USB|LSB|FM|AM|FT8|FT4|RTTY|PSK\d*)\b`)
	return re.FindString(strings.ToUpper(rawSpot))
}

func GetModeColor(mode string) string {
	switch strings.ToUpper(mode) {
	case "CW":
		return "#10b981"
	case "FT8", "FT4":
		return "#8b5cf6"
	case "RTTY":
		return "#f59e0b"
	case "FM":
		return "#ec4899"
	}
	if IsSSBMode(mode) {
		return "#3b82f6"
	}
	return "#6b7280"
}