using IBKRTrader.Core.Time;
using IBKRTrader.Core.Modularity;
using IBKRTrader.Core.Settings;
using IBKRTrader.Core.Trading;
using IBKRTrader.Core.Workers;
using Microsoft.Extensions.Configuration;

namespace IBKRTrader.UI.Views;

/// <summary>Core-View: Gesamtüberblick (Trading-Modus, aggregierte Kennzahlen, geladene Module).</summary>
public sealed class DashboardView : Form
{
    private readonly DashboardService      _dashboard;
    private readonly SettingsService       _settings;
    private readonly IReadOnlyList<IModule> _modules;
    private readonly IConfiguration        _config;
    private readonly int                   _workerCount;

    private readonly Label _lblMode  = new() { AutoSize = true, Location = new Point(20, 20), Font = new Font("Segoe UI", 13f, FontStyle.Bold) };
    private readonly Label _lblStats = new() { AutoSize = true, Location = new Point(20, 60) };
    private readonly Label _lblStatus = new() { AutoSize = true, Location = new Point(20, 90), ForeColor = SystemColors.GrayText };
    private readonly DataGridView _modulesGrid = new()
    {
        Location            = new Point(20, 130),
        Anchor              = AnchorStyles.Top | AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Right,
        ReadOnly            = true,
        AllowUserToAddRows  = false,
        RowHeadersVisible   = false,
        AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill
    };

    public DashboardView(
        DashboardService dashboard,
        SettingsService settings,
        IEnumerable<IModule> modules,
        IConfiguration config,
        IEnumerable<IWorker> workers)
    {
        _dashboard   = dashboard;
        _settings    = settings;
        _modules     = modules.ToList();
        _config      = config;
        _workerCount = workers.Count();

        Text          = "Dashboard";
        Width         = 900;
        Height        = 560;
        StartPosition = FormStartPosition.CenterScreen;
        MinimumSize   = new Size(600, 400);

        var modLabel = new Label { Text = "Geladene Module:", Location = new Point(20, 108), AutoSize = true };
        var refresh  = new Button { Text = "Aktualisieren", Location = new Point(760, 18), Width = 110, Anchor = AnchorStyles.Top | AnchorStyles.Right };
        refresh.Click += async (_, _) => await RefreshAsync();

        _modulesGrid.Size = new Size(ClientSize.Width - 40, ClientSize.Height - 150);

        Controls.Add(_lblMode);
        Controls.Add(_lblStats);
        Controls.Add(_lblStatus);
        Controls.Add(modLabel);
        Controls.Add(_modulesGrid);
        Controls.Add(refresh);
    }

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

    private async Task RefreshAsync()
    {
        var t = _settings.Settings.Trading;
        _lblMode.Text      = $"Trading: {t.Mode} – {(t.TradingEnabled ? "AKTIV" : "inaktiv")}";
        _lblMode.ForeColor = t.TradingEnabled ? Color.SeaGreen : SystemColors.GrayText;

        _modulesGrid.DataSource = _modules
            .Select(m => new
            {
                Modul  = m.Name,
                Präfix = m.DbPrefix,
                Status = m.GetActivationBlocker(_config) ?? "aktivierbar"
            })
            .ToList();

        try
        {
            var snap = await _dashboard.GetSnapshotAsync();
            _lblStats.Text  = $"Offene Positionen: {snap.OpenPositions}    |    Exposure: {snap.TotalExposure:N2}    |    " +
                              $"Trades gesamt: {snap.TotalTrades}    |    Worker/Services: {_workerCount}";
            _lblStatus.Text = $"Aktualisiert: {AppTimeZone.Now:HH:mm:ss}";
        }
        catch (Exception ex)
        {
            _lblStats.Text  = $"Kennzahlen n/v    |    Worker/Services: {_workerCount}";
            _lblStatus.Text = $"DB nicht erreichbar: {ex.Message}";
        }
    }
}