package main

import (
	"encoding/json"
	"os"
)

var conf *config

type keybindings struct {
	GuildsTreeViewFocus string

	MessagesTextViewFocus                string
	MessagesTextViewSelectPrevious       string
	MessagesTextViewSelectNext           string
	MessagesTextViewSelectFirst          string
	MessagesTextViewSelectLast           string
	MessagesTextViewReplySelected        string
	MessagesTextViewMentionReplySelected string

	MessageInputFieldFocus string
}

type theme struct {
	PrimitiveBackgroundColor    string // Main background color for primitives.
	ContrastBackgroundColor     string // Background color for contrasting elements.
	MoreContrastBackgroundColor string // Background color for even more contrasting elements.
	BorderColor                 string // Box borders.
	TitleColor                  string // Box titles.
	GraphicsColor               string // Graphics.
	PrimaryTextColor            string // Primary text.
	SecondaryTextColor          string // Secondary text (e.g. labels).
	TertiaryTextColor           string // Tertiary text (e.g. subtitles, notes).
	InverseTextColor            string // Text on primary-colored backgrounds.
	ContrastSecondaryTextColor  string // Secondary text on ContrastBackgroundColor-colored backgrounds.
}

type config struct {
	Token            string
	Mouse            bool
	Notifications    bool
	UserAgent        string
	GetMessagesLimit int
	Theme            theme
	Keybindings      keybindings
}

func loadConfig() *config {
	u, err := os.UserHomeDir()
	if err != nil {
		panic(err)
	}

	configPath := u + "/.config/discordo/config.json"
	if _, err = os.Stat(configPath); os.IsNotExist(err) {
		err = os.MkdirAll(u+"/.config/discordo", 0700)
		if err != nil {
			panic(err)
		}

		f, err := os.Create(configPath)
		if err != nil {
			panic(err)
		}
		defer f.Close()

		c := config{
			Mouse:         true,
			Notifications: true,
			UserAgent: "" +
				"Mozilla/5.0 (X11; Linux x86_64) " +
				"AppleWebKit/537.36 (KHTML, like Gecko) " +
				"Chrome/92.0.4515.131 Safari/537.36",
			GetMessagesLimit: 50,
			Theme: theme{
				PrimitiveBackgroundColor:    "black",
				ContrastBackgroundColor:     "blue",
				MoreContrastBackgroundColor: "green",
				BorderColor:                 "white",
				TitleColor:                  "white",
				GraphicsColor:               "white",
				PrimaryTextColor:            "white",
				SecondaryTextColor:          "yellow",
				TertiaryTextColor:           "green",
				InverseTextColor:            "blue",
				ContrastSecondaryTextColor:  "darkcyan",
			},
			Keybindings: keybindings{
				GuildsTreeViewFocus: "Alt+Rune[1]",

				MessagesTextViewFocus:                "Alt+Rune[2]",
				MessagesTextViewSelectPrevious:       "Up",
				MessagesTextViewSelectNext:           "Down",
				MessagesTextViewSelectFirst:          "Home",
				MessagesTextViewSelectLast:           "End",
				MessagesTextViewReplySelected:        "Rune[r]",
				MessagesTextViewMentionReplySelected: "Rune[R]",

				MessageInputFieldFocus: "Alt+Rune[3]",
			},
		}
		d, err := json.MarshalIndent(c, "", "\t")
		if err != nil {
			panic(err)
		}

		_, err = f.Write(d)
		if err != nil {
			panic(err)
		}

		f.Sync()

		return &c
	}

	d, err := os.ReadFile(configPath)
	if err != nil {
		panic(err)
	}

	var c config
	if err = json.Unmarshal(d, &c); err != nil {
		panic(err)
	}

	return &c
}