package main

import (
	"fmt"
	"os"
	"path/filepath"
	"s1d3sw1ped/swipedmodswitcher/admin"
	"slices"
	"strings"

	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/dialog"
	"fyne.io/fyne/v2/theme"
	"fyne.io/fyne/v2/widget"
	"gopkg.in/yaml.v3"
)

type Config struct {
	ModProfilesDirectory string `yaml:"mod_profiles_dir"`
	GameModsDirectory    string `yaml:"game_mods_dir"`
}

func saveConfig(cfg Config) {
	d, err := yaml.Marshal(cfg)
	if err != nil {
		fmt.Println(err)
	}

	err = os.WriteFile("config.yaml", d, 0775)
	if err != nil {
		fmt.Println(err)
	}
}

func loadConfig() *Config {
	_, err := os.Stat("config.yaml")
	if err != nil {
		fmt.Println(err)
		saveConfig(Config{ModProfilesDirectory: "", GameModsDirectory: ""})
	}

	d, err := os.ReadFile("config.yaml")
	if err != nil {
		fmt.Println(err)
	}

	cfg := Config{}
	err = yaml.Unmarshal(d, &cfg)
	if err != nil {
		fmt.Println(err)
		return &Config{}
	}

	return &cfg
}

var cfg *Config

func main() {
	if !admin.Admin() {
		if err := admin.RunSelfElevated(); err != nil {
			panic(err)
		}
		os.Exit(0)
	}

	cfg = loadConfig()

	ap := app.New()
	wp := ap.NewWindow("Swiped Mod Switcher")
	wp.Resize(fyne.NewSize(600, 1))
	wp.CenterOnScreen()

	grid := container.NewVBox()
	scroll := container.NewVScroll(grid)
	scroll.SetMinSize(fyne.NewSize(-1, 400))

	//load grid
	fillGrid(grid, wp)

	profilesrootentry := widget.NewEntry()
	profilesrootentry.SetText(cfg.ModProfilesDirectory)
	profilesrootentry.Disable()

	archiverootentry := widget.NewEntry()
	archiverootentry.SetText(cfg.GameModsDirectory)
	archiverootentry.Disable()

	container := container.NewVBox(
		widget.NewForm(widget.NewFormItem("Mod Profiles Directory", profilesrootentry)),
		widget.NewButtonWithIcon("Select", theme.FolderIcon(), func() {
			dialog.NewFolderOpen(func(lu fyne.ListableURI, err error) {
				if err != nil {
					fmt.Println(err)
				}
				if lu == nil {
					return
				}
				profilesrootentry.SetText(lu.Path())
				cfg.ModProfilesDirectory = lu.Path()
				saveConfig(*cfg)
				fillGrid(grid, wp)
			}, wp).Show()
		}),
		widget.NewForm(widget.NewFormItem("Game Mod Directory", archiverootentry)),
		widget.NewButtonWithIcon("Select", theme.FolderIcon(), func() {
			dialog.NewFolderOpen(func(lu fyne.ListableURI, err error) {
				if err != nil {
					fmt.Println(err)
				}
				if lu == nil {
					return
				}
				archiverootentry.SetText(lu.Path())
				cfg.GameModsDirectory = lu.Path()
				saveConfig(*cfg)
				fillGrid(grid, wp)
			}, wp).Show()
		}),
		widget.NewSeparator(),
		widget.NewButton("Reload Mod Profiles", func() {
			fillGrid(grid, wp)
		}),
		scroll,
	)
	wp.SetContent(container)
	wp.ShowAndRun()
}

func fillGrid(grid *fyne.Container, parent fyne.Window) {
	profiles := scanProfiles(cfg.ModProfilesDirectory)
	archive := cfg.GameModsDirectory
	grid.Hide()
	defer grid.Show()
	grid.RemoveAll()
	for _, profile := range profiles {
		profilename := filepath.Base(profile)
		grid.Add(widget.NewButton(profilename, makeIFunc(profile, archive, parent)))
	}
}

func scanProfiles(profilesroot string) []string {
	dir := filepath.Join(profilesroot, "*/")
	m, err := filepath.Glob(dir)
	if err != nil {
		fmt.Println(err)
	}

	mm := []string{}

	for _, path := range m {
		if s, err := os.Stat(path); err == nil && !strings.HasPrefix(s.Name(), ".") && s.IsDir() {
			mm = append(mm, path)
		}
	}

	slices.SortStableFunc(mm, func(a, b string) int {
		return strings.Compare(a, b)
	})

	return mm
}

func makeIFunc(profile, archive string, parent fyne.Window) func() {
	return func() {
		if cfg.GameModsDirectory == "" || cfg.ModProfilesDirectory == "" {
			dialog.NewInformation("Notice", "you must select a game mod directory and mod profiles directory before", parent).Show()
			return
		}

		// delete any existing archive folder
		_ = os.RemoveAll(archive)

		// link the profile to the archive
		err := os.Symlink(profile, archive)
		if err != nil {
			dialog.NewInformation("Error", "error linking most likely issue is Swiped Mod Switcher is not running as admin", parent).Show()
			return
		}

		dialog.NewInformation("Success", fmt.Sprintf("filinked files from %s to %s", filepath.Base(profile), archive), parent).Show()
	}
}