using FluentAssertions;
using IBKRTrader.Core.Configuration;
using IBKRTrader.Core.Settings;

namespace IBKRTrader.Tests.Configuration;

/// <summary>
/// Die eine maßgebliche Datenbankverbindung. Vorher lasen EF-Kontexte und BackupWorker je eine
/// eigene Konfiguration – eine Installation konnte laufen und dabei eine andere Datenbank sichern.
/// </summary>
[Trait("cat", "unit")]
public class DatabaseEndpointTests
{
    private static DatabaseSettings Settings() => new()
    {
        Host     = "db.example",
        Port     = 3306,
        Database = "ibkrtrader",
        User     = "trader",
        Password = "geheim"
    };

    [Fact]
    public void ConfiguredConnectionString_Wins_AndIsDecomposed()
    {
        var endpoint = DatabaseEndpoint.Resolve(
            "Server=127.0.0.1;Port=3999;Database=ibkrtrader_test;User ID=tester;Password=x;", Settings());

        endpoint.Source.Should().Be("appsettings");
        endpoint.Host.Should().Be("127.0.0.1");
        endpoint.Port.Should().Be(3999);
        endpoint.Database.Should().Be("ibkrtrader_test");
        endpoint.User.Should().Be("tester");
    }

    [Fact]
    public void WithoutConnectionString_SettingsJsonIsUsed()
    {
        var endpoint = DatabaseEndpoint.Resolve(null, Settings());

        endpoint.Source.Should().Be("settings.json");
        endpoint.Host.Should().Be("db.example");
        endpoint.Database.Should().Be("ibkrtrader");
        endpoint.DescribeDivergence(Settings()).Should().BeNull("aus einer Quelle kann nichts auseinanderlaufen");
    }

    [Fact]
    public void DivergingSources_AreReported()
    {
        var endpoint = DatabaseEndpoint.Resolve(
            "Server=127.0.0.1;Port=3306;Database=ibkrtrader_test;User ID=tester;Password=x;", Settings());

        var divergence = endpoint.DescribeDivergence(Settings());

        divergence.Should().NotBeNull();
        divergence.Should().Contain("ibkrtrader_test").And.Contain("db.example");
    }

    [Fact]
    public void MatchingSources_AreSilent()
    {
        var settings = Settings();
        var endpoint = DatabaseEndpoint.Resolve(settings.BuildConnectionString(), settings);

        endpoint.DescribeDivergence(settings).Should().BeNull();
    }

    [Fact]
    public void UnreadableConnectionString_FallsBackToSettingsJson()
    {
        var endpoint = DatabaseEndpoint.Resolve("das ist kein Connection-String", Settings());

        endpoint.Host.Should().Be("db.example");
        endpoint.Source.Should().StartWith("settings.json");
    }

    [Fact]
    public void ToString_NeverContainsThePassword()
    {
        var endpoint = DatabaseEndpoint.Resolve(null, Settings());

        endpoint.ToString().Should().NotContain("geheim");
        endpoint.ToString().Should().Be("trader@db.example:3306/ibkrtrader");
    }
}