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

namespace IBKRTrader.Modules.Supervisor.Agent;

/// <summary>
/// Baut die read-only Standard-Tool-Registry des Supervisors: Zugriffe auf Entscheidungsjournal,
/// Order-Events, Trade-Log, Dossiers, JSONL-Logs, KPIs, Counterfactuals und das Architektur-Dokument.
/// Alle Ergebnisse als kompakte JSON-/Markdown-Strings. KEIN Tool kann handeln oder schreiben.
/// </summary>
public static class SupervisorTools
{
    private static readonly JsonSerializerOptions JsonOpts = new()
    {
        Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping
    };

    public static SupervisorToolRegistry CreateRegistry(
        IDecisionJournal journal,
        IOrderEventLog orderEvents,
        TradeLogReader trades,
        DossierService dossiers,
        ISupervisorCounterfactualRepository? counterfactuals = null)
    {
        var reg = new SupervisorToolRegistry();
        string logsDir = Path.Combine(AppContext.BaseDirectory, "Logs");

        reg.Register(new SupervisorTool(
            "query_decisions",
            "Fragt das Entscheidungsjournal ab (JEDE Handelsentscheidung inkl. Ablehnungen mit Grund). " +
            "Filter optional: module, symbol, reason (z.B. RiskRejected), decision (Executed/Rejected/Skipped/Failed), sinceHours.",
            """{"type":"object","properties":{"module":{"type":"string"},"symbol":{"type":"string"},"reason":{"type":"string"},"decision":{"type":"string"},"sinceHours":{"type":"integer"},"limit":{"type":"integer"}}}""",
            args =>
            {
                int limit = Math.Clamp(SupervisorToolRegistry.GetInt(args, "limit") ?? 100, 1, 500);
                string? module = SupervisorToolRegistry.GetString(args, "module");
                string? symbol = SupervisorToolRegistry.GetString(args, "symbol");
                string? reason = SupervisorToolRegistry.GetString(args, "reason");
                string? decision = SupervisorToolRegistry.GetString(args, "decision");
                int? sinceHours = SupervisorToolRegistry.GetInt(args, "sinceHours");
                DateTime since = sinceHours.HasValue ? DateTime.UtcNow.AddHours(-sinceHours.Value) : DateTime.MinValue;

                var rows = journal.Query(d =>
                        (module == null || d.Module == module) &&
                        (symbol == null || d.Symbol == symbol) &&
                        d.Timestamp >= since, limit * 3)
                    .Where(d => reason == null || string.Equals(d.Reason.ToString(), reason, StringComparison.OrdinalIgnoreCase))
                    .Where(d => decision == null || string.Equals(d.Decision.ToString(), decision, StringComparison.OrdinalIgnoreCase))
                    .Take(limit)
                    .Select(d => new
                    {
                        d.SignalId, ts = d.Timestamp, d.Module, d.Symbol, d.Side, price = d.SignalPrice,
                        decision = d.Decision.ToString(), reason = d.Reason.ToString(), d.Message, ctx = d.ContextJson
                    });
                return JsonSerializer.Serialize(rows, JsonOpts);
            }));

        reg.Register(new SupervisorTool(
            "query_order_events",
            "Fragt das Order-Lifecycle-Log ab (Platzierungen, Broker-Antworten, Fills, Cancels). " +
            "Filter optional: module, symbol, signalId, sinceHours.",
            """{"type":"object","properties":{"module":{"type":"string"},"symbol":{"type":"string"},"signalId":{"type":"string"},"sinceHours":{"type":"integer"},"limit":{"type":"integer"}}}""",
            args =>
            {
                int limit = Math.Clamp(SupervisorToolRegistry.GetInt(args, "limit") ?? 100, 1, 500);
                string? module = SupervisorToolRegistry.GetString(args, "module");
                string? symbol = SupervisorToolRegistry.GetString(args, "symbol");
                string? signalId = SupervisorToolRegistry.GetString(args, "signalId");
                int? sinceHours = SupervisorToolRegistry.GetInt(args, "sinceHours");
                DateTime since = sinceHours.HasValue ? DateTime.UtcNow.AddHours(-sinceHours.Value) : DateTime.MinValue;

                var rows = orderEvents.Query(e =>
                        (module == null || e.Module == module) &&
                        (symbol == null || e.Symbol == symbol) &&
                        (signalId == null || e.SignalId == signalId) &&
                        e.Timestamp >= since, limit)
                    .Select(e => new
                    {
                        e.SignalId, ts = e.Timestamp, e.Module, e.Symbol,
                        eventType = e.EventType.ToString(), e.Side, e.Price, e.Quantity, e.OrderType,
                        e.Response, details = e.DetailsJson
                    });
                return JsonSerializer.Serialize(rows, JsonOpts);
            }));

        reg.Register(new SupervisorTool(
            "query_trades",
            "Fragt gebuchte Fills aus der modulübergreifenden Trade-Historie ab. " +
            "Filter optional: module, symbol, sinceDays.",
            """{"type":"object","properties":{"module":{"type":"string"},"symbol":{"type":"string"},"sinceDays":{"type":"integer"},"limit":{"type":"integer"}}}""",
            args =>
            {
                int limit = Math.Clamp(SupervisorToolRegistry.GetInt(args, "limit") ?? 100, 1, 500);
                string? module = SupervisorToolRegistry.GetString(args, "module");
                string? symbol = SupervisorToolRegistry.GetString(args, "symbol");
                int? sinceDays = SupervisorToolRegistry.GetInt(args, "sinceDays");
                DateTime since = sinceDays.HasValue ? DateTime.UtcNow.AddDays(-sinceDays.Value) : DateTime.MinValue;

                var rows = trades.Query(module, symbol, since, limit)
                    .Select(t => new
                    {
                        t.SignalId, t.Module, t.Symbol, t.Action, t.Quantity, t.Price, t.TotalValue,
                        t.TradedAt, t.Status
                    });
                return JsonSerializer.Serialize(rows, JsonOpts);
            }));

        reg.Register(new SupervisorTool(
            "get_dossier",
            "Liefert das komplette Dossier zu einer SignalId als Markdown: Entscheidungskette, Order-Events, Trades, Log-Auszug.",
            """{"type":"object","properties":{"signalId":{"type":"string"}},"required":["signalId"]}""",
            args =>
            {
                string? signalId = SupervisorToolRegistry.GetString(args, "signalId");
                if (string.IsNullOrWhiteSpace(signalId)) return "FEHLER: signalId fehlt.";
                return DossierBuilder.ToMarkdown(dossiers.BuildForSignal(signalId));
            }));

        reg.Register(new SupervisorTool(
            "read_logs",
            "Liest die JSONL-Logdatei eines Tages (Datum yyyy-MM-dd), optional gefiltert nach level, cid (SignalId) und textFilter.",
            """{"type":"object","properties":{"date":{"type":"string"},"level":{"type":"string"},"cid":{"type":"string"},"textFilter":{"type":"string"},"limit":{"type":"integer"}},"required":["date"]}""",
            args =>
            {
                string? date = SupervisorToolRegistry.GetString(args, "date");
                if (string.IsNullOrWhiteSpace(date)) return "FEHLER: date fehlt (yyyy-MM-dd).";
                string path = Path.Combine(logsDir, $"{date}.jsonl");
                if (!File.Exists(path)) return $"Keine JSONL-Datei für {date}.";

                string? level = SupervisorToolRegistry.GetString(args, "level");
                string? cid = SupervisorToolRegistry.GetString(args, "cid");
                string? text = SupervisorToolRegistry.GetString(args, "textFilter");
                int limit = Math.Clamp(SupervisorToolRegistry.GetInt(args, "limit") ?? 200, 1, 1000);

                var lines = new List<LogJson.ParsedLogLine>();
                foreach (var line in File.ReadLines(path))
                {
                    var p = LogJson.ParseLine(line);
                    if (p == null) continue;
                    if (level != null && !string.Equals(p.Level, level, StringComparison.OrdinalIgnoreCase)) continue;
                    if (cid != null && p.Cid != cid) continue;
                    if (text != null && !p.Message.Contains(text, StringComparison.OrdinalIgnoreCase)) continue;
                    lines.Add(p);
                    if (lines.Count >= limit) break;
                }
                return JsonSerializer.Serialize(lines, JsonOpts);
            }));

        reg.Register(new SupervisorTool(
            "get_kpis",
            "Berechnet Kennzahlen (Netto-PnL, Winrate, Ø-PnL, Profit-Faktor, Trade-Anzahl) über die " +
            "Trade-Historie (FIFO-realisiert). Filter optional: module, sinceDays.",
            """{"type":"object","properties":{"module":{"type":"string"},"sinceDays":{"type":"integer"}}}""",
            args =>
            {
                string? module = SupervisorToolRegistry.GetString(args, "module");
                int? sinceDays = SupervisorToolRegistry.GetInt(args, "sinceDays");
                DateTime since = sinceDays.HasValue ? DateTime.UtcNow.AddDays(-sinceDays.Value) : DateTime.MinValue;

                var fills = trades.ForKpis(module, since);
                var k = TradeAnalytics.ComputeKpis(fills);
                var byModule = TradeAnalytics.PnlByModule(fills);
                return JsonSerializer.Serialize(new
                {
                    k.TradeCount, k.NetPnl, k.WinRatePct, k.AvgPnlPerTrade, k.ProfitFactor,
                    byModule = byModule.Select(x => new { module = x.Key, x.Pnl, x.Count })
                }, JsonOpts);
            }));

        reg.Register(new SupervisorTool(
            "get_architecture_context",
            "Liefert das kuratierte Architektur-/Verhaltensdokument von IBKRTrader (wie die Software entscheidet und handelt).",
            """{"type":"object","properties":{}}""",
            _ => ArchitectureContext.Load()));

        if (counterfactuals != null)
        {
            reg.Register(new SupervisorTool(
                "query_counterfactuals",
                "Was wäre aus ABGELEHNTEN BUY-Signalen geworden? Liefert nach einer Wartezeit ausgewertete " +
                "Rejects (Reason, Signalpreis, späterer Kurs, hypothetischer PnL je Stück) — zeigt, ob Risk-Limits Gewinne oder Verluste verhindert haben.",
                """{"type":"object","properties":{"limit":{"type":"integer"}}}""",
                args =>
                {
                    int limit = Math.Clamp(SupervisorToolRegistry.GetInt(args, "limit") ?? 200, 1, 500);
                    var rows = counterfactuals.GetRecent(limit).Select(c => new
                    {
                        c.SignalId, c.CheckedAt, c.Module, c.Symbol, reason = c.Reason,
                        signalPrice = c.SignalPrice, laterPrice = c.LaterPrice, pnlPerShare = c.HypotheticalPnlPerShare
                    });
                    return JsonSerializer.Serialize(rows, JsonOpts);
                }));
        }

        return reg;
    }
}