using Svrnty.CQRS.Configuration;

namespace Svrnty.CQRS.Tests;

public class CqrsConfigurationTests
{
    private class TestConfig
    {
        public string Value { get; set; } = string.Empty;
    }

    private class OtherConfig
    {
        public int Number { get; set; }
    }

    [Fact]
    public void SetConfiguration_CanBeRetrieved()
    {
        var config = new CqrsConfiguration();
        var testConfig = new TestConfig { Value = "hello" };

        config.SetConfiguration(testConfig);

        var retrieved = config.GetConfiguration<TestConfig>();
        Assert.NotNull(retrieved);
        Assert.Equal("hello", retrieved.Value);
    }

    [Fact]
    public void GetConfiguration_ReturnsNull_WhenNotSet()
    {
        var config = new CqrsConfiguration();

        var retrieved = config.GetConfiguration<TestConfig>();

        Assert.Null(retrieved);
    }

    [Fact]
    public void HasConfiguration_ReturnsTrue_WhenSet()
    {
        var config = new CqrsConfiguration();
        config.SetConfiguration(new TestConfig());

        Assert.True(config.HasConfiguration<TestConfig>());
    }

    [Fact]
    public void HasConfiguration_ReturnsFalse_WhenNotSet()
    {
        var config = new CqrsConfiguration();

        Assert.False(config.HasConfiguration<TestConfig>());
    }

    [Fact]
    public void SetConfiguration_OverwritesPrevious()
    {
        var config = new CqrsConfiguration();
        config.SetConfiguration(new TestConfig { Value = "first" });
        config.SetConfiguration(new TestConfig { Value = "second" });

        var retrieved = config.GetConfiguration<TestConfig>();
        Assert.Equal("second", retrieved!.Value);
    }

    [Fact]
    public void MultipleConfigTypes_AreIndependent()
    {
        var config = new CqrsConfiguration();
        config.SetConfiguration(new TestConfig { Value = "test" });
        config.SetConfiguration(new OtherConfig { Number = 42 });

        Assert.Equal("test", config.GetConfiguration<TestConfig>()!.Value);
        Assert.Equal(42, config.GetConfiguration<OtherConfig>()!.Number);
    }

    [Fact]
    public void ExecuteMappingCallbacks_InvokesAllCallbacks()
    {
        var config = new CqrsConfiguration();
        var callCount = 0;

        config.AddMappingCallback(_ => callCount++);
        config.AddMappingCallback(_ => callCount++);

        config.ExecuteMappingCallbacks(new object());

        Assert.Equal(2, callCount);
    }

    [Fact]
    public void ExecuteMappingCallbacks_PassesAppObject()
    {
        var config = new CqrsConfiguration();
        object? receivedApp = null;

        config.AddMappingCallback(app => receivedApp = app);

        var expected = new object();
        config.ExecuteMappingCallbacks(expected);

        Assert.Same(expected, receivedApp);
    }
}