using System.Net;
using Common.Configuration.DownloadClient;
using Common.Enums;
using Infrastructure.Http;
using Shouldly;

namespace Infrastructure.Tests.Http;

public class DynamicHttpClientProviderTests : IClassFixture<DynamicHttpClientProviderFixture>
{
    private readonly DynamicHttpClientProviderFixture _fixture;

    public DynamicHttpClientProviderTests(DynamicHttpClientProviderFixture fixture)
    {
        _fixture = fixture;
    }

    [Fact]
    public void CreateClient_WithQBitConfig_ShouldReturnConfiguredClient()
    {
        // Arrange
        var sut = _fixture.CreateSut();
        var config = _fixture.CreateQBitClientConfig();

        // Act
        var httpClient = sut.CreateClient(config);

        // Assert
        httpClient.ShouldNotBeNull();
        httpClient.BaseAddress.ShouldBe(config.Url);
        VerifyDefaultHttpClientProperties(httpClient);
    }
    
    [Fact]
    public void CreateClient_WithTransmissionConfig_ShouldReturnConfiguredClient()
    {
        // Arrange
        var sut = _fixture.CreateSut();
        var config = _fixture.CreateTransmissionClientConfig();

        // Act
        var httpClient = sut.CreateClient(config);

        // Assert
        httpClient.ShouldNotBeNull();
        httpClient.BaseAddress.ShouldBe(config.Url);
        VerifyDefaultHttpClientProperties(httpClient);
    }
    
    [Fact]
    public void CreateClient_WithDelugeConfig_ShouldReturnConfiguredClient()
    {
        // Arrange
        var sut = _fixture.CreateSut();
        var config = _fixture.CreateDelugeClientConfig();

        // Act
        var httpClient = sut.CreateClient(config);

        // Assert
        httpClient.ShouldNotBeNull();
        httpClient.BaseAddress.ShouldBe(config.Url);
        
        // Deluge client should have additional properties configured
        VerifyDelugeHttpClientProperties(httpClient);
    }
    
    [Fact]
    public void CreateClient_WithSameConfig_ShouldReturnUniqueInstances()
    {
        // Arrange
        var sut = _fixture.CreateSut();
        var config = _fixture.CreateQBitClientConfig();

        // Act
        var firstClient = sut.CreateClient(config);
        var secondClient = sut.CreateClient(config);

        // Assert
        firstClient.ShouldNotBeNull();
        secondClient.ShouldNotBeNull();
        firstClient.ShouldNotBeSameAs(secondClient); // Should be different instances
    }
    
    [Fact]
    public void CreateClient_WithCustomCertificateValidation_ShouldConfigureHandler()
    {
        // Arrange
        var sut = _fixture.CreateSut();
        var config = _fixture.CreateQBitClientConfig();

        // Act
        var httpClient = sut.CreateClient(config);

        // Assert
        httpClient.ShouldNotBeNull();
        
        // Since we can't directly access the handler settings after creation,
        // we verify the behavior is working by checking if the client can be created properly
        httpClient.BaseAddress.ShouldBe(config.Url);
    }
    
    [Fact]
    public void CreateClient_WithTimeout_ShouldConfigureTimeout()
    {
        // Arrange
        var sut = _fixture.CreateSut();
        var config = _fixture.CreateQBitClientConfig();
        TimeSpan expectedTimeout = TimeSpan.FromSeconds(30);

        // Act
        var httpClient = sut.CreateClient(config);

        // Assert
        httpClient.Timeout.ShouldBe(expectedTimeout);
    }
    
    private void VerifyDefaultHttpClientProperties(HttpClient httpClient)
    {
        // Check common properties that should be set for all clients
        httpClient.Timeout.ShouldBe(TimeSpan.FromSeconds(30));
        httpClient.DefaultRequestHeaders.ShouldNotBeNull();
    }
    
    private void VerifyDelugeHttpClientProperties(HttpClient httpClient)
    {
        // Verify Deluge-specific HTTP client configurations
        VerifyDefaultHttpClientProperties(httpClient);
        
        // Using reflection to access the handler is tricky and potentially brittle
        // Instead, we focus on verifying the client itself is properly configured
        httpClient.BaseAddress.ShouldNotBeNull();
    }
}