package tui

import (
	"os"
	"path/filepath"
	"strings"
)

type Theme struct {
	Name   string
	Dark   bool
	Accent string
	Dim    string
	Muted  string
	Ok     string
	Todo   string
	Event  string
	Remind string
	Danger string
}

var themes = []Theme{
	{Name: "dark", Dark: true, Accent: "#c8942a", Dim: "#504840", Muted: "#8c8070", Ok: "#7aab72", Todo: "#d4a84b", Event: "#6898c8", Remind: "#c8784a", Danger: "#b85858"},
	{Name: "tinycard", Dark: true, Accent: "#ad8ee6", Dim: "#555a6a", Muted: "#8b90a0", Ok: "#4ade80", Todo: "#fbbf24", Event: "#22d3ee", Remind: "#e8845a", Danger: "#ef4444"},
	{Name: "catppuccin", Dark: true, Accent: "#cba6f7", Dim: "#6c7086", Muted: "#a6adc8", Ok: "#a6e3a1", Todo: "#f9e2af", Event: "#89b4fa", Remind: "#fab387", Danger: "#f38ba8"},
	{Name: "nord", Dark: true, Accent: "#88c0d0", Dim: "#4c566a", Muted: "#d8dee9", Ok: "#a3be8c", Todo: "#ebcb8b", Event: "#81a1c1", Remind: "#d08770", Danger: "#bf616a"},
	{Name: "dracula", Dark: true, Accent: "#bd93f9", Dim: "#6272a4", Muted: "#bfbfbf", Ok: "#50fa7b", Todo: "#f1fa8c", Event: "#8be9fd", Remind: "#ffb86c", Danger: "#ff5555"},
	{Name: "gruvbox", Dark: true, Accent: "#fabd2f", Dim: "#665c54", Muted: "#a89984", Ok: "#b8bb26", Todo: "#fabd2f", Event: "#83a598", Remind: "#fe8019", Danger: "#fb4934"},
	{Name: "rosepine", Dark: true, Accent: "#c4a7e7", Dim: "#6e6a86", Muted: "#908caa", Ok: "#a6da95", Todo: "#f6c177", Event: "#31748f", Remind: "#ea9a97", Danger: "#eb6f92"},
	{Name: "tokyonight", Dark: true, Accent: "#7aa2f7", Dim: "#565f89", Muted: "#a9b1d6", Ok: "#9ece6a", Todo: "#e0af68", Event: "#7aa2f7", Remind: "#ff9e64", Danger: "#f7768e"},
	{Name: "solarized", Dark: true, Accent: "#268bd2", Dim: "#586e75", Muted: "#657b83", Ok: "#859900", Todo: "#b58900", Event: "#268bd2", Remind: "#cb4b16", Danger: "#dc322f"},
	{Name: "paper", Dark: false, Accent: "#8a6018", Dim: "#a09080", Muted: "#6a5e50", Ok: "#2a6828", Todo: "#7a5c00", Event: "#245890", Remind: "#984020", Danger: "#882030"},
	{Name: "catppuccin-latte", Dark: false, Accent: "#8839ef", Dim: "#9ca0b0", Muted: "#6c6f85", Ok: "#40a02b", Todo: "#df8e1d", Event: "#1e66f5", Remind: "#fe640b", Danger: "#d20f39"},
	{Name: "rosepine-dawn", Dark: false, Accent: "#907aa9", Dim: "#9893a5", Muted: "#797593", Ok: "#56949f", Todo: "#ea9d34", Event: "#286983", Remind: "#d7827e", Danger: "#b4637a"},
	{Name: "solarized-light", Dark: false, Accent: "#268bd2", Dim: "#93a1a1", Muted: "#586e75", Ok: "#859900", Todo: "#b58900", Event: "#268bd2", Remind: "#cb4b16", Danger: "#dc322f"},
}

var activeThemeIndex int

func activeTheme() Theme {
	return themes[activeThemeIndex]
}

func cycleTheme() Theme {
	activeThemeIndex = (activeThemeIndex + 1) % len(themes)
	applyTheme()
	saveTheme()
	return themes[activeThemeIndex]
}

func glamourStyle() string {
	if themes[activeThemeIndex].Dark {
		return "dark"
	}
	return "light"
}

func themePath() string {
	home, err := os.UserHomeDir()
	if err != nil {
		return ""
	}
	return filepath.Join(home, ".nib", "theme")
}

func loadTheme() {
	p := themePath()
	if p == "" {
		return
	}
	data, err := os.ReadFile(p)
	if err != nil {
		return
	}
	name := strings.TrimSpace(string(data))
	for i, t := range themes {
		if t.Name == name {
			activeThemeIndex = i
			return
		}
	}
}

func saveTheme() {
	p := themePath()
	if p == "" {
		return
	}
	_ = os.WriteFile(p, []byte(themes[activeThemeIndex].Name+"\n"), 0o644)
}