package ui

import (
	"encoding/json"
	"os"
	"sync"

	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/dialog"
	"fyne.io/fyne/v2/widget"

	"gitea.unprism.ru/KRBL/FemaInstaller/pkg/config"
)

var mu = sync.Mutex{}

// MainWindow represents the main application window
type MainWindow struct {
	Window           fyne.Window
	IPEntry          *widget.Entry
	PortEntry        *widget.Entry
	LoginEntry       *widget.Entry
	PasswordEntry    *widget.Entry
	SerialEntry      *widget.Entry
	TailNumberEntry  *widget.Entry
	DefaultHostEntry *widget.Entry
	ArchivePathEntry *widget.Entry
	StatusLabel      *widget.Label
	InstallButton    *widget.Button
}

func loadConfig() *config.SSHConfig {
	fileName := "config.json"
	if _, err := os.Stat(fileName); os.IsNotExist(err) {
		return nil
	}

	data, err := os.ReadFile(fileName)
	if err != nil {
		return nil
	}

	var cfg config.SSHConfig
	err = json.Unmarshal(data, &cfg)
	if err != nil {
		return nil
	}

	return &cfg
}

// NewMainWindow creates a new main window for the application
func NewMainWindow(app fyne.App, installHandler func(*config.SSHConfig) error) *MainWindow {
	window := app.NewWindow("Fema Installer")

	// Create form fields
	mainWindow := &MainWindow{
		Window:           window,
		IPEntry:          widget.NewEntry(),
		PortEntry:        widget.NewEntry(),
		LoginEntry:       widget.NewEntry(),
		PasswordEntry:    widget.NewPasswordEntry(),
		SerialEntry:      widget.NewEntry(),
		TailNumberEntry:  widget.NewEntry(),
		DefaultHostEntry: widget.NewEntry(),
		ArchivePathEntry: widget.NewEntry(),
		StatusLabel:      widget.NewLabel(""),
	}

	cfg := loadConfig()

	if cfg != nil {
		mainWindow.IPEntry.SetText(cfg.IP)
		mainWindow.PortEntry.SetText(cfg.Port)
		mainWindow.LoginEntry.SetText(cfg.Login)
		mainWindow.PasswordEntry.SetText(cfg.Password)
		mainWindow.SerialEntry.SetText(cfg.Serial)
		mainWindow.TailNumberEntry.SetText(cfg.TailNumber)
		mainWindow.DefaultHostEntry.SetText(cfg.DefaultHost)
		mainWindow.ArchivePathEntry.SetText(cfg.ArchivePath)
	}

	// Disable archive path entry (will be set by file selector)
	mainWindow.ArchivePathEntry.Disable()

	// Create archive selection button
	selectArchiveBtn := widget.NewButton("Select Archive", func() {
		CustomFileSelector(window, func(path string) {
			mainWindow.ArchivePathEntry.SetText(path)
		})
	})

	// Create install button
	mainWindow.InstallButton = widget.NewButton("Install", func() {
		config := &config.SSHConfig{
			IP:          mainWindow.IPEntry.Text,
			Port:        mainWindow.PortEntry.Text,
			Login:       mainWindow.LoginEntry.Text,
			Password:    mainWindow.PasswordEntry.Text,
			Serial:      mainWindow.SerialEntry.Text,
			TailNumber:  mainWindow.TailNumberEntry.Text,
			DefaultHost: mainWindow.DefaultHostEntry.Text,
			ArchivePath: mainWindow.ArchivePathEntry.Text,
		}

		mainWindow.StatusLabel.SetText("Starting installation...")
		go func() {
			// Validate serial number
			if len([]rune(config.Serial)) != 16 {
				mainWindow.StatusLabel.SetText("Serial number must be 16 characters")
				dialog.ShowInformation("Error", "Serial number must be 16 characters", window)
				return
			}
			mu.Lock()
			jsonData, _ := json.MarshalIndent(config, "", "    ")

			// Записываем JSON в файл
			fileName := "config.json"
			os.WriteFile(fileName, jsonData, 0644)
			mu.Unlock()
			// Perform installation
			err := installHandler(config)
			if err != nil {
				dialog.ShowError(err, window)
				mainWindow.StatusLabel.SetText("Installation failed")
			} else {
				mainWindow.StatusLabel.SetText("Installation completed successfully!")
				dialog.ShowInformation("Success", "Installation completed successfully!", window)
			}
		}()
	})

	// Create form layout
	form := container.NewVBox(
		widget.NewForm(
			widget.NewFormItem("IP", mainWindow.IPEntry),
			widget.NewFormItem("Port", mainWindow.PortEntry),
			widget.NewFormItem("Login", mainWindow.LoginEntry),
			widget.NewFormItem("Password", mainWindow.PasswordEntry),
			widget.NewFormItem("Serial Number", mainWindow.SerialEntry),
			widget.NewFormItem("Tail Number", mainWindow.TailNumberEntry),
			widget.NewFormItem("Default Server", mainWindow.DefaultHostEntry),
			widget.NewFormItem("Archive", container.NewHBox(mainWindow.ArchivePathEntry, selectArchiveBtn)),
		),
		mainWindow.InstallButton,
		mainWindow.StatusLabel,
	)

	// Set window content and size
	window.SetContent(form)
	window.Resize(fyne.NewSize(400, 300))

	return mainWindow
}

// Show displays the main window
func (w *MainWindow) Show() {
	w.Window.Show()
}

// ShowAndRun displays the main window and starts the application
func (w *MainWindow) ShowAndRun() {
	w.Window.ShowAndRun()
}