using FluentAssertions;
using IBKRTrader.Modules.Accounting.Logic;
using IBKRTrader.Modules.Accounting.Models;

namespace IBKRTrader.Tests.Modules.Accounting;

[Trait("cat", "unit")]
public class CsvExporterTests
{
    [Fact]
    public void Ledger_HasHeader_AndInvariantFormatting()
    {
        var entries = new[]
        {
            new LedgerEntry
            {
                AccountId = "U1", EventType = LedgerEventType.TradeSell, Side = "SELL", Symbol = "AAPL",
                Currency = "USD", Quantity = 10m, PriceNative = 130.5m, GrossBase = 1305m, FeeBase = 1m,
                NetBase = 1304m, TransactionId = "T1", Source = "ibkr-flex",
                Timestamp = new DateTime(2026, 1, 2, 15, 4, 5, DateTimeKind.Utc)
            }
        };

        var csv = CsvExporter.Ledger(entries);

        csv.Should().StartWith("Timestamp,AccountId,EventType,Side,Symbol");
        csv.Should().Contain("2026-01-02 15:04:05");
        csv.Should().Contain("130.5");     // Punkt-Dezimal, kulturinvariant
        csv.Should().Contain("TradeSell");
    }

    [Fact]
    public void Quote_EscapesCommasAndQuotes()
    {
        var entries = new[]
        {
            new LedgerEntry { AccountId = "U1", Symbol = "A,B\"C", EventType = LedgerEventType.Other, TransactionId = "X" }
        };

        var csv = CsvExporter.Ledger(entries);

        csv.Should().Contain("\"A,B\"\"C\"");
    }

    [Fact]
    public void Statement_ListsKeyMetrics()
    {
        var s = new PeriodStatement("U1", DateTime.UtcNow.AddDays(-30), DateTime.UtcNow,
            OpeningBalance: 100m, ClosingBalance: 150m, Deposits: 50m, Withdrawals: 0m,
            TradeVolume: 200m, Dividends: 5m, Interest: 0m, Fees: 2m, TaxWithheld: 1m,
            NetTradingResult: 0m, TradeCount: 3, EntryCount: 6);

        var csv = CsvExporter.Statement(s, "USD");

        csv.Should().Contain("Kennzahl,USD");
        csv.Should().Contain("Anfangssaldo,100");
        csv.Should().Contain("Endsaldo,150");
    }
}