package ui

import (
	"math"
	"strings"

	"thehouseoficarus/internal/color"
)

type BarStyle struct {
	FilledColor int
	EmptyColor  int
	EmptyDim    bool
}

func RenderBar(current, max, width int, unicode bool) string {
	if max <= 0 {
		max = 1
	}
	if current < 0 {
		current = 0
	}
	if current > max {
		current = max
	}
	filled := int(math.Round(float64(current) * float64(width) / float64(max)))
	if filled > width {
		filled = width
	}
	if filled < 0 {
		filled = 0
	}

	fillRune, emptyRune := barRunes(unicode)
	return strings.Repeat(fillRune, filled) + strings.Repeat(emptyRune, width-filled)
}

func RenderBarF(current, max float64, width int, unicode bool) string {
	if max <= 0 {
		max = 1
	}
	ratio := current / max
	if ratio > 1 {
		ratio = 1
	}
	if ratio < 0 {
		ratio = 0
	}
	filled := int(math.Round(ratio * float64(width)))
	if filled > width {
		filled = width
	}
	if filled < 0 {
		filled = 0
	}

	fillRune, emptyRune := barRunes(unicode)
	return strings.Repeat(fillRune, filled) + strings.Repeat(emptyRune, width-filled)
}

func RenderColoredBar(current, max, width int, unicode bool, style *BarStyle, mode string) string {
	if max <= 0 {
		max = 1
	}
	if current < 0 {
		current = 0
	}
	if current > max {
		current = max
	}
	filled := int(math.Round(float64(current) * float64(width) / float64(max)))
	if filled > width {
		filled = width
	}
	if filled < 0 {
		filled = 0
	}

	fillRune, emptyRune := barRunes(unicode)
	fillStr := strings.Repeat(fillRune, filled)
	emptyStr := strings.Repeat(emptyRune, width-filled)

	if style != nil && mode != "none" && mode != "" {
		if style.FilledColor >= 0 {
			fillStr = color.Render(mode, color.ColorSpec{Fg: style.FilledColor}, fillStr)
		}
		if style.EmptyColor >= 0 {
			spec := color.ColorSpec{Fg: style.EmptyColor}
			if style.EmptyDim {
				spec.Dim = true
			}
			emptyStr = color.Render(mode, spec, emptyStr)
		}
	}

	return fillStr + emptyStr
}

func barRunes(unicode bool) (fill, empty string) {
	return BarRunes(unicode)
}

// BarRunes returns the fill and empty runes used for progress bars, selecting
// Unicode block characters when unicode is true and ASCII otherwise.
func BarRunes(unicode bool) (fill, empty string) {
	if unicode {
		return "█", "░"
	}
	return "#", "."
}