using IBKRTrader.Core.Logging;

namespace IBKRTrader.Core.Trading;

/// <summary>
/// Sicherer Standard-Broker: handelt NIEMALS.
/// Wird registriert, bis der echte IBKR-Adapter angebunden und gegen den
/// Paper-Gateway verifiziert ist. So kann keine Order versehentlich rausgehen.
/// </summary>
public sealed class NullBrokerClient : IBrokerClient, IBrokerPortfolioReader
{
    private readonly LoggingService _logger;

    public NullBrokerClient(LoggingService logger) => _logger = logger;

    public Task<IReadOnlyList<BrokerPosition>> GetPositionsAsync(CancellationToken ct = default)
        => Task.FromResult<IReadOnlyList<BrokerPosition>>(Array.Empty<BrokerPosition>());

    public Task<IReadOnlyList<BrokerExecution>> GetExecutionsAsync(DateTime? since = null, CancellationToken ct = default)
        => Task.FromResult<IReadOnlyList<BrokerExecution>>(Array.Empty<BrokerExecution>());

    public Task<Quote?> GetQuoteAsync(string symbol, CancellationToken ct = default)
        => Task.FromResult<Quote?>(null);

    public Task<AccountState> GetAccountStateAsync(CancellationToken ct = default)
        => Task.FromResult(new AccountState(0m, 0m));

    public Task<OrderResult> PlaceOrderAsync(OrderRequest request, CancellationToken ct = default)
    {
        _logger.Warn("Core",
            $"NullBrokerClient: Order NICHT ausgeführt ({request.Side} {request.Quantity}x {request.Symbol}) " +
            "– echter IBKR-Broker noch nicht angebunden.");
        return Task.FromResult(OrderResult.Fail("Broker nicht angebunden (NullBrokerClient)."));
    }
}