using IBKRTrader.Core.Database;
using IBKRTrader.Core.IBKR;
using IBKRTrader.Core.Logging;
using IBKRTrader.Core.Settings;

namespace IBKRTrader.Core.Workers.BuiltIn;

/// <summary>
/// Synchronisiert IBKR-Instrumentenstammdaten alle 30 Tage.
/// </summary>
public class IBKRInstrumentSyncWorker : WorkerBase
{
    public override string     Name   => "IBKR Instrument Sync";
    public override string     Module => "Core";
    public override WorkerType Type   => WorkerType.Worker;

    protected override TimeSpan? Interval =>
        TimeSpan.FromMinutes(_settings.Settings.WorkerSettings.InstrumentSyncWorker.IntervalMinutes);

    private readonly SettingsService          _settings;
    private readonly IBKRGatewayService       _gateway;
    private readonly IBKRMarketDataRepository _repo;

    public IBKRInstrumentSyncWorker(
        LoggingService logger, DatabaseService db,
        SettingsService settings, IBKRGatewayService gateway,
        IBKRMarketDataRepository repo)
        : base(logger, db)
    {
        _settings = settings;
        _gateway  = gateway;
        _repo     = repo;
    }

    protected override async Task ExecuteAsync(CancellationToken ct)
    {
        if (!_settings.Settings.IBKRWebApi.Enabled)
        {
            Logger.Info(Module, "IBKR Web API deaktiviert – InstrumentSync übersprungen.");
            return;
        }

        var authStatus = await _gateway.CheckAuthStatusAsync(ct);
        if (authStatus?.Authenticated != true)
        {
            Logger.Warn(Module, "IBKR Gateway nicht authentifiziert – InstrumentSync übersprungen.");
            return;
        }

        await _gateway.TickleAsync(ct);
        await MapUnmappedTickersAsync(ct);
        await RefreshExistingInstrumentsAsync(ct);
    }

    private async Task MapUnmappedTickersAsync(CancellationToken ct)
    {
        var unmapped = (await _repo.GetUnmappedTickersFromCongressTradesAsync()).ToList();
        if (unmapped.Count == 0) { Logger.Info(Module, "Keine neuen unmapped Ticker."); return; }

        Logger.Info(Module, $"Mappe {unmapped.Count} neue Ticker auf IBKR-Contracts...");
        int mapped = 0, failed = 0;

        foreach (var ticker in unmapped)
        {
            if (ct.IsCancellationRequested) break;
            try
            {
                var results = await _gateway.SearchContractBySymbolAsync(ticker, ct);
                if (results == null || results.Count == 0)
                { Logger.Warn(Module, $"Kein Contract für: {ticker}"); failed++; continue; }

                long conid = results[0].ConId;
                var existing = await _repo.GetInstrumentByConidAsync(conid);

                if (existing == null)
                {
                    var info = await _gateway.GetContractInfoAsync(conid, ct);
                    var instrument = new IBKRInstrument
                    {
                        IbkrConid = conid, Symbol = info?.Symbol ?? ticker,
                        SecType = info?.InstrumentType ?? "STK",
                        Exchange = info?.Exchange ?? "SMART",
                        PrimaryExchange = info?.ListingExchange,
                        Currency = info?.Currency ?? "USD",
                        CompanyName = info?.CompanyName ?? results[0].CompanyName,
                        Sector = info?.Sector, Industry = info?.Industry,
                        Description = info?.Text, Active = true,
                        LastFetched = DateTime.UtcNow
                    };
                    var id = await _repo.UpsertInstrumentAsync(instrument);
                    await _repo.UpsertExternalIdentifierAsync(id, "capitoltrades", ticker);
                    Logger.Info(Module, $"Neu: {ticker} → conid {conid}");
                }
                else
                {
                    await _repo.UpsertExternalIdentifierAsync(existing.Id, "capitoltrades", ticker);
                }
                mapped++;
            }
            catch (Exception ex) { Logger.Error(Module, $"Mapping '{ticker}': {ex.Message}", ex); failed++; }
        }
        Logger.Info(Module, $"Mapping: {mapped} OK, {failed} Fehler.");
    }

    private async Task RefreshExistingInstrumentsAsync(CancellationToken ct)
    {
        var instruments = (await _repo.GetAllActiveInstrumentsAsync()).ToList();
        if (instruments.Count == 0) return;

        Logger.Info(Module, $"Aktualisiere {instruments.Count} Instrumente...");
        int ok = 0, err = 0;

        foreach (var instr in instruments)
        {
            if (ct.IsCancellationRequested) break;
            try
            {
                var info = await _gateway.GetContractInfoAsync(instr.IbkrConid, ct);
                if (info == null) { err++; continue; }

                instr.Symbol = info.Symbol ?? instr.Symbol;
                instr.CompanyName = info.CompanyName ?? instr.CompanyName;
                instr.Sector = info.Sector ?? instr.Sector;
                instr.Industry = info.Industry ?? instr.Industry;
                instr.LastFetched = DateTime.UtcNow;
                await _repo.UpsertInstrumentAsync(instr);
                ok++;
            }
            catch (Exception ex) { Logger.Error(Module, $"Update {instr.Symbol}: {ex.Message}", ex); err++; }
        }
        Logger.Info(Module, $"Stammdaten: {ok} OK, {err} Fehler.");
    }
}