using System.Windows.Controls;
using ClaudeDo.Installer.Core;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using Microsoft.Win32;

namespace ClaudeDo.Installer.Pages.ServicePage;

public partial class ServicePageViewModel : ObservableObject, IInstallerPage
{
    private readonly InstallContext _context;
    private ServicePageView? _view;

    public string Title => "Service";
    public string Icon => "\uE912";
    public int Order => 2;
    public bool ShowInWizard => true;
    public bool ShowInSettings => true;
    public UserControl View => _view ??= new ServicePageView { DataContext = this };

    [ObservableProperty] private int _signalRPort = 47_821;
    [ObservableProperty] private int _queueBackstopIntervalMs = 30_000;
    [ObservableProperty] private string _claudeBin = "claude";
    [ObservableProperty] private bool _isLocalSystem = true;
    [ObservableProperty] private bool _isCurrentUser;
    [ObservableProperty] private bool _autoStart = true;
    [ObservableProperty] private int _restartDelayMs = 5000;
    [ObservableProperty] private string? _validationError;

    public ServicePageViewModel(InstallContext context) => _context = context;

    public Task LoadAsync()
    {
        var cfg = InstallerWorkerConfig.Load();
        SignalRPort = cfg.SignalRPort;
        QueueBackstopIntervalMs = cfg.QueueBackstopIntervalMs;
        ClaudeBin = cfg.ClaudeBin;
        return Task.CompletedTask;
    }

    public Task ApplyAsync()
    {
        _context.SignalRPort = SignalRPort;
        _context.QueueBackstopIntervalMs = QueueBackstopIntervalMs;
        _context.ClaudeBin = ClaudeBin;
        _context.ServiceAccount = IsCurrentUser ? "CurrentUser" : "LocalSystem";
        _context.AutoStart = AutoStart;
        _context.RestartDelayMs = RestartDelayMs;
        _context.SignalRUrl = $"http://127.0.0.1:{SignalRPort}/hub";
        return Task.CompletedTask;
    }

    public bool Validate()
    {
        if (SignalRPort < 1024 || SignalRPort > 65535)
        {
            ValidationError = "Port must be between 1024 and 65535.";
            return false;
        }

        if (QueueBackstopIntervalMs <= 0)
        {
            ValidationError = "Queue backstop interval must be greater than 0.";
            return false;
        }

        if (string.IsNullOrWhiteSpace(ClaudeBin))
        {
            ValidationError = "Claude CLI path is required.";
            return false;
        }

        ValidationError = null;
        return true;
    }

    [RelayCommand]
    private void BrowseClaude()
    {
        var dialog = new OpenFileDialog
        {
            Title = "Select Claude CLI executable",
            Filter = "Executables (*.exe)|*.exe|All files (*.*)|*.*",
        };
        if (dialog.ShowDialog() == true)
            ClaudeBin = dialog.FileName;
    }
}