using IBKRTrader.Core.Database.Migrations;
using IBKRTrader.Core.Logging;
using IBKRTrader.Core.Modules;
using IBKRTrader.Core.Settings;
using IBKRTrader.Core.Workers;
using IBKRTrader.UI;

namespace IBKRTrader;

/// <summary>
/// Launcher – das Basis-Fenster der Anwendung.
/// Enthält die Core-Panels (Workers, Logs, Settings) und eine Modul-Liste,
/// aus der jedes Modul als eigenständiges Fenster geöffnet wird.
/// </summary>
public partial class LauncherForm : Form
{
    private readonly LoggingService  _logger;
    private readonly WorkerEngine    _workerEngine;
    private readonly SettingsService _settings;
    private readonly CoreMigrations  _migrations;
    private readonly IBKRMigrations  _ibkrMigrations;
    private readonly ModuleRegistry  _modules;
    private readonly WindowManager   _windows;
    private readonly IServiceProvider _services;

    private LogPanelController? _logPanel;

    public LauncherForm(
        LoggingService   logger,
        WorkerEngine     workerEngine,
        SettingsService  settings,
        CoreMigrations   migrations,
        IBKRMigrations   ibkrMigrations,
        ModuleRegistry   modules,
        WindowManager    windows,
        IServiceProvider services)
    {
        InitializeComponent();

        _logger         = logger;
        _workerEngine   = workerEngine;
        _settings       = settings;
        _migrations     = migrations;
        _ibkrMigrations = ibkrMigrations;
        _modules        = modules;
        _windows        = windows;
        _services       = services;
    }

    // ─── Form-Events ──────────────────────────────────────────────────────────

    protected override void OnLoad(EventArgs e)
    {
        base.OnLoad(e);
        InitializeLogPanel();
        InitializeWorkerList();
        InitializeSettingsGrid();
        InitializeModulePanel();
        _ = StartupAsync();
    }

    protected override void OnFormClosing(FormClosingEventArgs e)
    {
        base.OnFormClosing(e);
        // Offene Modul-Fenster schließen, dann Worker sauber beenden.
        _windows.CloseAll();
        _workerEngine.StopAllAsync().GetAwaiter().GetResult();
    }

    // ─── Initialisierung ──────────────────────────────────────────────────────

    private void InitializeLogPanel()
    {
        // RichTextBox auf Dock.Fill setzen
        rtb_logs.Dock = DockStyle.Fill;
        _logPanel = new LogPanelController(rtb_logs, _logger);

        // LogLevel aus Settings setzen
        var levelStr = _settings.Settings.Logging.Level;
        if (Enum.TryParse<AppLogLevel>(levelStr, true, out var level))
            _logger.SetMinLevel(level);
    }

    private void InitializeWorkerList()
    {
        WorkerListBindingSource.Setup(dgv_workerlist, _workerEngine.WorkerInfos);
    }

    private void InitializeSettingsGrid()
    {
        pg_settings.SelectedObject = _settings.Settings;
    }

    /// <summary>Baut je Modul eine Karte mit „Fenster öffnen"-Button.</summary>
    private void InitializeModulePanel()
    {
        flp_modules.FlowDirection = FlowDirection.LeftToRight;
        flp_modules.WrapContents   = true;
        flp_modules.Controls.Clear();

        foreach (var module in _modules.Modules)
            flp_modules.Controls.Add(BuildModuleCard(module));
    }

    private Control BuildModuleCard(IModule module)
    {
        var card = new Panel
        {
            Width       = 320,
            Height      = 150,
            Margin      = new Padding(8),
            BorderStyle = BorderStyle.FixedSingle
        };

        var title = new Label
        {
            Text      = $"{module.DisplayName}  [{module.Key}]",
            Font      = new Font(Font.FontFamily, 11f, FontStyle.Bold),
            Location  = new Point(10, 10),
            AutoSize  = true
        };

        var desc = new Label
        {
            Text     = module.Description,
            Location = new Point(10, 42),
            Size     = new Size(300, 60),
            AutoEllipsis = true
        };

        var open = new Button
        {
            Text     = "Fenster öffnen",
            Location = new Point(10, 108),
            Width    = 140,
            Tag      = module
        };
        open.Click += (_, _) => OpenModuleWindow(module);

        var version = new Label
        {
            Text      = $"v{module.Version}",
            Location  = new Point(240, 113),
            AutoSize  = true,
            ForeColor = SystemColors.GrayText
        };

        card.Controls.Add(title);
        card.Controls.Add(desc);
        card.Controls.Add(open);
        card.Controls.Add(version);
        return card;
    }

    /// <summary>Öffnet (oder fokussiert) das eigenständige Fenster eines Moduls.</summary>
    private void OpenModuleWindow(IModule module)
    {
        try
        {
            _windows.OpenOrFocus(module.Key, () => module.CreateWindow(_services));
        }
        catch (Exception ex)
        {
            _logger.Error(module.Key, $"{module.DisplayName}: Fenster konnte nicht geöffnet werden.", ex);
            MessageBox.Show(this,
                $"Fenster für '{module.DisplayName}' konnte nicht geöffnet werden:\n{ex.Message}",
                "Modul-Fenster", MessageBoxButtons.OK, MessageBoxIcon.Warning);
        }
    }

    // ─── Async Startup ────────────────────────────────────────────────────────

    private async Task StartupAsync()
    {
        _logger.Info("Core", "=== IBKRTrader startet ===");
        _logger.Info("Core", $"Version: 1.0.0 | .NET {Environment.Version}");

        // DB-Verbindung testen und Core-Migrationen laufen lassen
        try
        {
            _logger.Info("Core", "Verbinde mit Datenbank...");
            await _migrations.RunAsync();
            await _ibkrMigrations.RunAsync();
        }
        catch (Exception ex)
        {
            _logger.Error("Core", "Core-Datenbankfehler beim Start.", ex);
        }

        // Modul-Migrationen: über die Registry iterieren (Core kennt kein Modul).
        foreach (var module in _modules.Modules)
        {
            try
            {
                await module.InitializeAsync(_services);
            }
            catch (Exception ex)
            {
                _logger.Error(module.Key, $"{module.DisplayName}: Initialisierung fehlgeschlagen.", ex);
            }
        }

        // Worker starten
        await _workerEngine.StartAllAsync();

        _logger.Info("Core", "IBKRTrader bereit.");
        UpdateStatusBar("Bereit");
    }

    // ─── StatusBar ────────────────────────────────────────────────────────────

    private void UpdateStatusBar(string text)
    {
        if (statusStrip1.InvokeRequired)
            statusStrip1.BeginInvoke(() => UpdateStatusBar(text));
        else
        {
            // Vorhandenes Label nutzen oder neues anlegen
            if (statusStrip1.Items.Count == 0)
                statusStrip1.Items.Add(new ToolStripStatusLabel());
            statusStrip1.Items[0].Text = $"Status: {text}  |  {DateTime.Now:HH:mm:ss}";
        }
    }
}