using System.Text;
using System.Text.Json;
using IBKRTrader.Core.Analytics;
using IBKRTrader.Core.Logging;
using IBKRTrader.Modules.Supervisor.Agent;
using IBKRTrader.Modules.Supervisor.Persistence;
using IBKRTrader.Modules.Supervisor.Services;

namespace IBKRTrader.UI.Views.Modules;

/// <summary>
/// Fenster des Supervisor-Moduls: Analyse (Chat mit dem Agenten, Tool-Aufrufe sichtbar), Dossier-Browser,
/// Berichte, Settings. Read-only. DB-/Agent-Zugriffe laufen NUR auf Nutzer-Interaktion (Smoke-UI-sicher).
/// </summary>
public sealed class SupervisorMainForm : Form
{
    private readonly SupervisorAgent             _agent;
    private readonly DossierService              _dossiers;
    private readonly ISupervisorReportRepository _reports;
    private readonly LoggingService              _logger;

    private readonly ComboBox      _profile  = new() { DropDownStyle = ComboBoxStyle.DropDownList, Width = 160 };
    private readonly TextBox       _question = new() { Dock = DockStyle.Fill, Multiline = true, Height = 60 };
    private readonly RichTextBox   _answer   = new() { Dock = DockStyle.Fill, ReadOnly = true, Font = new Font("Consolas", 9f) };
    private readonly Button        _ask      = new() { Text = "Fragen", Width = 100 };

    private readonly DataGridView  _signals  = new() { Dock = DockStyle.Left, Width = 360, ReadOnly = true, AllowUserToAddRows = false, RowHeadersVisible = false, AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill };
    private readonly RichTextBox   _dossier  = new() { Dock = DockStyle.Fill, ReadOnly = true, Font = new Font("Consolas", 9f) };
    private readonly DataGridView  _reportsGrid = new() { Dock = DockStyle.Fill, ReadOnly = true, AllowUserToAddRows = false, RowHeadersVisible = false, AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill };

    public SupervisorMainForm(
        SupervisorAgent agent, DossierService dossiers, ISupervisorReportRepository reports, LoggingService logger)
    {
        _agent    = agent;
        _dossiers = dossiers;
        _reports  = reports;
        _logger   = logger;

        Text          = "Supervisor";
        Width         = 1080;
        Height        = 720;
        StartPosition = FormStartPosition.CenterScreen;
        MinimumSize   = new Size(800, 520);

        foreach (var p in SupervisorProfiles.All) _profile.Items.Add(p.Name);
        _profile.SelectedIndex = 0;

        BuildLayout();
    }

    private void BuildLayout()
    {
        var tabs = new TabControl { Dock = DockStyle.Fill };

        // ── Tab: Analyse ──
        var tabChat = new TabPage("Analyse");
        var top = new FlowLayoutPanel { Dock = DockStyle.Top, Height = 36, Padding = new Padding(8, 6, 8, 0) };
        top.Controls.Add(new Label { Text = "Profil", AutoSize = true, Margin = new Padding(0, 8, 4, 0) });
        top.Controls.Add(_profile);
        _ask.Click += async (_, _) => await AskAsync();
        var qPanel = new Panel { Dock = DockStyle.Top, Height = 70, Padding = new Padding(8, 2, 8, 4) };
        qPanel.Controls.Add(_question);
        var askPanel = new Panel { Dock = DockStyle.Top, Height = 34, Padding = new Padding(8, 0, 8, 0) };
        askPanel.Controls.Add(_ask);
        var answerPanel = new Panel { Dock = DockStyle.Fill, Padding = new Padding(8) };
        answerPanel.Controls.Add(_answer);
        tabChat.Controls.Add(answerPanel);
        tabChat.Controls.Add(askPanel);
        tabChat.Controls.Add(qPanel);
        tabChat.Controls.Add(top);

        // ── Tab: Dossier-Browser ──
        var tabDossier = new TabPage("Dossier-Browser");
        _signals.SelectionChanged += (_, _) => ShowSelectedDossier();
        var refreshSignals = new Button { Text = "Signale laden", Dock = DockStyle.Top, Height = 28 };
        refreshSignals.Click += (_, _) => LoadSignals();
        var left = new Panel { Dock = DockStyle.Left, Width = 360 };
        left.Controls.Add(_signals);
        left.Controls.Add(refreshSignals);
        var dossierPanel = new Panel { Dock = DockStyle.Fill, Padding = new Padding(8) };
        dossierPanel.Controls.Add(_dossier);
        tabDossier.Controls.Add(dossierPanel);
        tabDossier.Controls.Add(left);

        // ── Tab: Berichte ──
        var tabReports = new TabPage("Berichte");
        var refreshReports = new Button { Text = "Berichte laden", Dock = DockStyle.Top, Height = 28 };
        refreshReports.Click += (_, _) => LoadReports();
        tabReports.Controls.Add(_reportsGrid);
        tabReports.Controls.Add(refreshReports);

        // ── Tab: Settings (Info) ──
        var tabSettings = new TabPage("Settings");
        tabSettings.Controls.Add(new Label
        {
            Dock = DockStyle.Fill, Padding = new Padding(16),
            Text =
                "Supervisor – read-only Analyse/Forensik über alle Module.\n\n" +
                "OpenRouter-Key:  env IBKRTRADER_OPENROUTER_KEY  oder Datei 'openrouter.key' (gitignored).\n" +
                $"   Status: {(string.IsNullOrEmpty(OpenRouterClient.DefaultApiKeyProvider()) ? "NICHT gesetzt – Chat nicht verfügbar" : "gesetzt")}\n\n" +
                "Tagesbericht (opt-in):  env IBKRTRADER_SUPERVISOR_DAILY = Stunde 0–23.\n" +
                "MCP-Light (opt-in):     env IBKRTRADER_MCP_PORT = Port (bindet nur 127.0.0.1).\n\n" +
                "Sicherheit: OpenRouter ist ein bewusst freigegebener externer Datenempfänger. Es werden nur\n" +
                "Analyse-Daten der Tools gesendet, niemals Secrets. Kein Tool kann handeln oder schreiben."
        });

        tabs.TabPages.AddRange(new[] { tabChat, tabDossier, tabReports, tabSettings });
        Controls.Add(tabs);
    }

    // ── Analyse ──

    private async Task AskAsync()
    {
        var question = _question.Text.Trim();
        if (string.IsNullOrEmpty(question)) return;

        _ask.Enabled = false;
        _answer.Clear();
        var profile = SupervisorProfiles.ByName(_profile.Text);
        var progress = new Progress<string>(s => AppendLine(s));

        try
        {
            var result = await _agent.AskAsync(question, profile: profile, progress: progress);
            AppendLine("");
            AppendLine("─── Antwort ───");
            AppendLine(result.Answer);

            _reports.Insert(new SupervisorReport
            {
                Profile = profile.Name,
                Model = SupervisorAgent.DefaultModel,
                Question = question,
                Answer = result.Answer,
                ToolCallsJson = JsonSerializer.Serialize(result.ToolInvocations.Select(i => new { i.Tool, i.Arguments })),
                ToolCallCount = result.ToolInvocations.Count,
                PromptTokens = result.PromptTokens,
                CompletionTokens = result.CompletionTokens
            });
        }
        catch (Exception ex)
        {
            AppendLine("");
            AppendLine($"FEHLER: {ex.Message}");
            _logger.Warn("Supervisor", $"Analyse fehlgeschlagen: {ex.Message}");
        }
        finally
        {
            _ask.Enabled = true;
        }
    }

    private void AppendLine(string text)
    {
        if (_answer.InvokeRequired) { _answer.BeginInvoke(() => AppendLine(text)); return; }
        _answer.AppendText(text + "\n");
        _answer.ScrollToCaret();
    }

    // ── Dossier ──

    private void LoadSignals()
    {
        try { _signals.DataSource = _dossiers.RecentSignals(200); }
        catch (Exception ex) { _logger.Warn("Supervisor", $"Signale laden fehlgeschlagen: {ex.Message}"); }
    }

    private void ShowSelectedDossier()
    {
        if (_signals.CurrentRow?.DataBoundItem is not SignalSummary s) return;
        try { _dossier.Text = DossierBuilder.ToMarkdown(_dossiers.BuildForSignal(s.SignalId)); }
        catch (Exception ex) { _dossier.Text = $"FEHLER: {ex.Message}"; }
    }

    // ── Berichte ──

    private void LoadReports()
    {
        try
        {
            _reportsGrid.DataSource = _reports.GetRecent(100)
                .Select(r => new { r.CreatedAt, r.Profile, r.Model, r.Question, r.ToolCallCount, r.PromptTokens, r.CompletionTokens })
                .ToList();
        }
        catch (Exception ex) { _logger.Warn("Supervisor", $"Berichte laden fehlgeschlagen: {ex.Message}"); }
    }
}