using IBKRTrader.Core.Logging;
using IBKRTrader.Core.Workers;
using IBKRTrader.Modules.CongressTrading.Database;
using IBKRTrader.UI;

namespace IBKRTrader.Modules.CongressTrading.UI;

/// <summary>
/// Eigenständiges Fenster des CongressTrading-Moduls.
/// Phase 2: Grundgerüst mit DB-Kennzahlen und manuellem Scrape-Trigger.
/// Die vollständige Trade-/Positions-Ansicht folgt in Phase 4.
/// </summary>
public sealed class CongressTradingForm : ModuleFormBase
{
    private const string ScrapeWorkerName = "CT-ScrapeWorker";

    private readonly CongressRepository _repo;
    private readonly WorkerEngine       _engine;
    private readonly LoggingService     _logger;

    private readonly Label  _lblTrades  = new() { AutoSize = true, Location = new Point(20, 70) };
    private readonly Label  _lblMembers = new() { AutoSize = true, Location = new Point(20, 100) };
    private readonly Button _btnRefresh = new() { Text = "Aktualisieren", Location = new Point(20, 140), Width = 140 };
    private readonly Button _btnScrape  = new() { Text = "Scrape jetzt",  Location = new Point(170, 140), Width = 140 };
    private readonly Label  _lblStatus  = new() { AutoSize = true, Location = new Point(20, 185), ForeColor = SystemColors.GrayText };

    public CongressTradingForm(CongressRepository repo, WorkerEngine engine, LoggingService logger)
        : base(CongressTradingModule.ModuleKey)
    {
        _repo   = repo;
        _engine = engine;
        _logger = logger;

        Text = "Congress Trading [CT]";
        BuildLayout();
    }

    private void BuildLayout()
    {
        var title = new Label
        {
            Text     = "Congress Trading",
            Font     = new Font(Font.FontFamily, 14f, FontStyle.Bold),
            Location = new Point(18, 20),
            AutoSize = true
        };

        var hint = new Label
        {
            Text      = "Vollständige Trade- und Positions-Ansicht folgt in Phase 4.",
            Location  = new Point(20, 230),
            AutoSize  = true,
            ForeColor = SystemColors.GrayText
        };

        _btnRefresh.Click += async (_, _) => await RefreshStatsAsync();
        _btnScrape.Click  += async (_, _) => await TriggerScrapeAsync();

        Controls.Add(title);
        Controls.Add(_lblTrades);
        Controls.Add(_lblMembers);
        Controls.Add(_btnRefresh);
        Controls.Add(_btnScrape);
        Controls.Add(_lblStatus);
        Controls.Add(hint);
    }

    protected override async void OnShown(EventArgs e)
    {
        base.OnShown(e);
        await RefreshStatsAsync();
    }

    private async Task RefreshStatsAsync()
    {
        try
        {
            var trades  = await _repo.GetTradeCountAsync();
            var members = await _repo.GetMemberCountAsync();
            _lblTrades.Text  = $"Trades in DB: {trades:N0}";
            _lblMembers.Text = $"Mitglieder in DB: {members:N0}";
            _lblStatus.Text  = $"Aktualisiert: {DateTime.Now:HH:mm:ss}";
        }
        catch (Exception ex)
        {
            _lblTrades.Text  = "Trades in DB: n/v";
            _lblMembers.Text = "Mitglieder in DB: n/v";
            _lblStatus.Text  = $"DB nicht erreichbar: {ex.Message}";
            _logger.Warn(CongressTradingModule.ModuleKey, $"Kennzahlen konnten nicht geladen werden: {ex.Message}");
        }
    }

    private async Task TriggerScrapeAsync()
    {
        try
        {
            _lblStatus.Text = "Scrape angestoßen...";
            await _engine.TriggerWorkerAsync(ScrapeWorkerName);
            _logger.Info(CongressTradingModule.ModuleKey, "Scrape-Worker manuell ausgelöst (aus Modul-Fenster).");
        }
        catch (Exception ex)
        {
            _lblStatus.Text = $"Scrape fehlgeschlagen: {ex.Message}";
            _logger.Error(CongressTradingModule.ModuleKey, "Manueller Scrape-Trigger fehlgeschlagen.", ex);
        }
    }
}