// package ui contains the Fyne GUI bootstrap and wiring.
package ui

import (
	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"

	"gitea.mrixs.me/Mrixs/MrixsCraft-launcher/internal/auth"
	"gitea.mrixs.me/Mrixs/MrixsCraft-launcher/internal/config"
	"gitea.mrixs.me/Mrixs/MrixsCraft-launcher/internal/ui/screens"
	"gitea.mrixs.me/Mrixs/MrixsCraft-launcher/internal/ui/theme"
)

// Launch initialises the Fyne application with the Minecraft theme and shows the main window.
func Launch(client *auth.Client, session *auth.Session, settings config.Settings) {
	a := app.New()
	a.Settings().SetTheme(&theme.MinecraftTheme{})

	w := a.NewWindow("MrixsCraft")
	w.Resize(fyne.NewSize(float32(settings.Width), float32(settings.Height)))
	w.CenterOnScreen()

	// TODO: fetch from /api/servers.json
	serverList := []screens.Modpack{
		{Slug: "hitech", Name: "HiTech 1.21"},
		{Slug: "vanilla", Name: "Vanilla 1.20"},
	}

	onPlay := func() {
		// TODO: launch selected modpack
	}

	onSettings := func() {
		screens.SettingsScreen(w, func(memoryMB int, extraArgs string) {
			settings.MemoryMB = memoryMB
			settings.ExtraArgs = extraArgs
			_ = config.Save(settings)
		})
	}

	content := screens.MainScreen(w, client, session, serverList, onPlay, onSettings)
	w.SetContent(content)

	// If no session, show login modal after the window is rendered.
	if session == nil {
		w.Show()
		screens.LoginScreen(w, client, func(sess *auth.Session) {
			// Refresh UI with logged-in state.
			content := screens.MainScreen(w, client, sess, serverList, onPlay, onSettings)
			w.SetContent(content)
		})
	}

	w.ShowAndRun()
}