namespace PS.IPAM.Tests.Helpers;

using System.Net;
using FluentAssertions;
using PS.IPAM;
using PS.IPAM.Helpers;
using PS.IPAM.Tests.Mocks;
using Xunit;

[Collection("Sequential")]
public class RequestHelperTests : IDisposable
{
    private MockHttpMessageHandler? _mockHandler;

    public RequestHelperTests()
    {
        // Clean state before each test
        SessionManager.CloseSession();
        RequestHelper.TestHttpHandler = null;
    }

    public void Dispose()
    {
        // Clean up after each test
        SessionManager.CloseSession();
        RequestHelper.TestHttpHandler = null;
        _mockHandler?.ForceDispose();
    }

    private void SetupSession(AuthType authType = AuthType.Token)
    {
        if (authType == AuthType.Token)
        {
            SessionManager.CreateSessionWithToken("https://ipam.example.com", "testapp", "test-token");
        }
        else
        {
            // For credentials auth, we need to set up a session manually with future expiry
            var session = new Session(
                AuthType.Credentials,
                "cred-token",
                "testapp",
                "https://ipam.example.com",
                DateTime.Now.AddHours(1),
                null
            );
            SessionManager.CurrentSession = session;
        }
    }

    private MockHttpMessageHandler SetupMockHandler()
    {
        _mockHandler = new MockHttpMessageHandler();
        RequestHelper.TestHttpHandler = _mockHandler;
        return _mockHandler;
    }

    [Fact]
    public async Task InvokeRequest_WithNoSession_ThrowsException()
    {
        // Arrange - no session set up

        // Act
        var action = async () => await RequestHelper.InvokeRequest("GET", ApiController.Addresses);

        // Assert
        await action.Should().ThrowAsync<InvalidOperationException>().WithMessage("No session available!");
    }

    [Fact]
    public async Task InvokeRequest_WithValidSession_BuildsCorrectUri()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        handler.WithSuccessResponse("{\"id\":1,\"ip\":\"192.168.1.1\"}");

        // Act
        await RequestHelper.InvokeRequest("GET", ApiController.Addresses, ModelType.Address, null, null, new[] { "1" });

        // Assert
        handler.LastRequest.Should().NotBeNull();
        handler.LastRequest!.RequestUri!.ToString().Should().Be("https://ipam.example.com/api/testapp/addresses/1/");
    }

    [Fact]
    public async Task InvokeRequest_WithSubController_BuildsCorrectUri()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        handler.WithSuccessResponse("[]");

        // Act
        await RequestHelper.InvokeRequest("GET", ApiController.Subnets, null, ApiSubController.Tags, null, new[] { "1" });

        // Assert
        handler.LastRequest!.RequestUri!.ToString().Should().Contain("/subnets/tags/1/");
    }

    [Fact]
    public async Task InvokeRequest_WithTokenAuth_AddsPhpipamTokenHeader()
    {
        // Arrange
        SetupSession(AuthType.Token);
        var handler = SetupMockHandler();
        handler.WithSuccessResponse("{}");

        // Act
        await RequestHelper.InvokeRequest("GET", ApiController.Addresses);

        // Assert
        handler.GetLastRequestHeader("phpipam-token").Should().Be("test-token");
    }

    [Fact]
    public async Task InvokeRequest_WithCredentialsAuth_AddsTokenHeader()
    {
        // Arrange
        SetupSession(AuthType.Credentials);
        var handler = SetupMockHandler();
        handler.WithSuccessResponse("{}");

        // Act
        await RequestHelper.InvokeRequest("GET", ApiController.Addresses);

        // Assert
        handler.GetLastRequestHeader("token").Should().Be("cred-token");
    }

    [Fact]
    public async Task InvokeRequest_GetMethod_UsesHttpGet()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        handler.WithSuccessResponse("{}");

        // Act
        await RequestHelper.InvokeRequest("GET", ApiController.Addresses);

        // Assert
        handler.LastRequest!.Method.Should().Be(HttpMethod.Get);
    }

    [Fact]
    public async Task InvokeRequest_PostMethod_UsesHttpPost()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        handler.WithSuccessResponse("{\"id\":1}");

        // Act
        await RequestHelper.InvokeRequest("POST", ApiController.Addresses, null, null, new { ip = "10.0.0.1" });

        // Assert
        handler.LastRequest!.Method.Should().Be(HttpMethod.Post);
    }

    [Fact]
    public async Task InvokeRequest_PatchMethod_UsesHttpPatch()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        handler.WithSuccessResponse("{\"id\":1}");

        // Act
        await RequestHelper.InvokeRequest("PATCH", ApiController.Addresses, null, null, new { description = "updated" }, new[] { "1" });

        // Assert
        handler.LastRequest!.Method.Should().Be(new HttpMethod("PATCH"));
    }

    [Fact]
    public async Task InvokeRequest_DeleteMethod_UsesHttpDelete()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        handler.WithSuccessResponse("{}");

        // Act
        await RequestHelper.InvokeRequest("DELETE", ApiController.Addresses, null, null, null, new[] { "1" });

        // Assert
        handler.LastRequest!.Method.Should().Be(HttpMethod.Delete);
    }

    [Fact]
    public async Task InvokeRequest_With404Response_ReturnsNull()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        handler.WithNotFoundResponse();

        // Act
        var result = await RequestHelper.InvokeRequest("GET", ApiController.Addresses, ModelType.Address, null, null, new[] { "999" });

        // Assert
        result.Should().BeNull();
    }

    [Fact]
    public async Task InvokeRequest_WithErrorResponse_ThrowsHttpRequestException()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        handler.WithErrorResponse(HttpStatusCode.InternalServerError, "Server error");

        // Act
        var action = async () => await RequestHelper.InvokeRequest("GET", ApiController.Addresses);

        // Assert
        await action.Should().ThrowAsync<HttpRequestException>();
    }

    [Fact]
    public async Task InvokeRequest_WithAddressType_ReturnsAddressObject()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        var addressJson = @"{
            ""id"": 1,
            ""subnetId"": 10,
            ""ip"": ""192.168.1.100"",
            ""is_gateway"": false,
            ""description"": ""Test server"",
            ""hostname"": ""server01"",
            ""mac"": ""00:11:22:33:44:55"",
            ""owner"": ""admin"",
            ""tag"": 2,
            ""deviceId"": 0,
            ""location"": """",
            ""port"": """",
            ""note"": """",
            ""lastSeen"": null,
            ""excludePing"": false,
            ""PTRignore"": false,
            ""PTR"": 0,
            ""firewallAddressObject"": """",
            ""editDate"": null,
            ""customer_id"": 0
        }";
        handler.WithSuccessResponse(addressJson);

        // Act
        var result = await RequestHelper.InvokeRequest("GET", ApiController.Addresses, ModelType.Address, null, null, new[] { "1" });

        // Assert
        result.Should().BeOfType<Address>();
        var address = (Address)result!;
        address.Id.Should().Be(1);
        address.Ip.Should().Be("192.168.1.100");
        address.Hostname.Should().Be("server01");
    }

    [Fact]
    public async Task InvokeRequest_WithAddressArray_ReturnsListOfAddresses()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        var addressArrayJson = @"[
            {""id"": 1, ""subnetId"": 10, ""ip"": ""192.168.1.1"", ""hostname"": ""host1""},
            {""id"": 2, ""subnetId"": 10, ""ip"": ""192.168.1.2"", ""hostname"": ""host2""}
        ]";
        handler.WithSuccessResponse(addressArrayJson);

        // Act
        var result = await RequestHelper.InvokeRequest("GET", ApiController.Subnets, ModelType.Address, null, null, new[] { "10", "addresses" });

        // Assert
        result.Should().BeAssignableTo<IEnumerable<object>>();
        var addresses = ((IEnumerable<object>)result!).ToList();
        addresses.Should().HaveCount(2);
        addresses[0].Should().BeOfType<Address>();
        ((Address)addresses[0]).Ip.Should().Be("192.168.1.1");
    }

    [Fact]
    public async Task InvokeRequest_WithVlanType_ReturnsVlanObject()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        var vlanJson = @"{
            ""vlanId"": 100,
            ""domainId"": 1,
            ""name"": ""Production"",
            ""number"": 100,
            ""description"": ""Production VLAN"",
            ""editDate"": null,
            ""customer_id"": 0
        }";
        handler.WithSuccessResponse(vlanJson);

        // Act
        var result = await RequestHelper.InvokeRequest("GET", ApiController.Vlan, ModelType.Vlan, null, null, new[] { "100" });

        // Assert
        result.Should().BeOfType<Vlan>();
        var vlan = (Vlan)result!;
        vlan.Name.Should().Be("Production");
        vlan.Number.Should().Be(100);
    }

    [Fact]
    public async Task InvokeRequest_WithSubnetworkType_ReturnsSubnetworkObject()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        var subnetJson = @"{
            ""id"": 1,
            ""subnet"": ""192.168.1.0"",
            ""mask"": 24,
            ""sectionId"": 1,
            ""description"": ""Test subnet"",
            ""linked_subnet"": """",
            ""firewallAddressObject"": """",
            ""vrfId"": 0,
            ""masterSubnetId"": 0,
            ""allowRequests"": false,
            ""vlanId"": 100,
            ""showName"": false,
            ""deviceId"": 0,
            ""permissions"": """",
            ""pingSubnet"": false,
            ""discoverSubnet"": false,
            ""resolveDNS"": false,
            ""DNSrecursive"": false,
            ""DNSrecords"": false,
            ""nameserverId"": 0,
            ""scanAgent"": false,
            ""isFolder"": false,
            ""isFull"": false,
            ""isPool"": false,
            ""state"": 1,
            ""threshold"": 0,
            ""location"": 0,
            ""editDate"": null,
            ""lastScan"": null,
            ""lastDiscovery"": null,
            ""calculation"": {}
        }";
        handler.WithSuccessResponse(subnetJson);

        // Act
        var result = await RequestHelper.InvokeRequest("GET", ApiController.Subnets, ModelType.Subnetwork, null, null, new[] { "1" });

        // Assert
        result.Should().BeOfType<Subnetwork>();
        var subnet = (Subnetwork)result!;
        subnet.Subnet.Should().Be("192.168.1.0");
        subnet.Mask.Should().Be(24);
        subnet.CIDR.Should().Be("192.168.1.0/24");
    }

    [Fact]
    public async Task InvokeRequest_WithSectionType_ReturnsSectionObject()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        var sectionJson = @"{
            ""id"": 1,
            ""name"": ""Production"",
            ""description"": ""Production section"",
            ""masterSection"": 0,
            ""permissions"": """",
            ""strictMode"": false,
            ""subnetOrdering"": ""default"",
            ""order"": 1,
            ""editDate"": null,
            ""showSubnet"": true,
            ""showVlan"": true,
            ""showVRF"": false,
            ""showSupernetOnly"": false,
            ""DNS"": 0
        }";
        handler.WithSuccessResponse(sectionJson);

        // Act
        var result = await RequestHelper.InvokeRequest("GET", ApiController.Sections, ModelType.Section, null, null, new[] { "1" });

        // Assert
        result.Should().BeOfType<Section>();
        var section = (Section)result!;
        section.Name.Should().Be("Production");
    }

    [Fact]
    public async Task InvokeRequest_WithCustomFields_ParsesExtendedData()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        var addressJson = @"{
            ""id"": 1,
            ""subnetId"": 10,
            ""ip"": ""192.168.1.100"",
            ""hostname"": ""server01"",
            ""custom_environment"": ""production"",
            ""custom_owner"": ""team-a""
        }";
        handler.WithSuccessResponse(addressJson);

        // Act
        var result = await RequestHelper.InvokeRequest("GET", ApiController.Addresses, ModelType.Address, null, null, new[] { "1" });

        // Assert
        var address = (Address)result!;
        address.ExtendedData.Should().NotBeNull();
        var extendedData = address.ExtendedData!;
        extendedData.Should().ContainKey("custom_environment");
        extendedData.Should().ContainKey("custom_owner");
    }

    [Fact]
    public async Task InvokeRequest_WithNoType_ReturnsDynamicData()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        handler.WithSuccessResponse(@"{""some"": ""data""}");

        // Act
        var result = await RequestHelper.InvokeRequest("GET", ApiController.Tools);

        // Assert
        result.Should().NotBeNull();
    }

    [Fact]
    public async Task InvokeRequest_PostWithParameters_SerializesJsonBody()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        handler.WithSuccessResponse(@"{""id"": 1}");

        var parameters = new { ip = "10.0.0.1", subnetId = 5, description = "New address" };

        // Act
        await RequestHelper.InvokeRequest("POST", ApiController.Addresses, null, null, parameters);

        // Assert
        handler.LastRequest!.Content.Should().NotBeNull();
        var content = await handler.LastRequest.Content!.ReadAsStringAsync();
        content.Should().Contain("10.0.0.1");
        content.Should().Contain("subnetId");
    }

    [Fact]
    public async Task InvokeRequest_SetsAcceptJsonHeader()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        handler.WithSuccessResponse("{}");

        // Act
        await RequestHelper.InvokeRequest("GET", ApiController.Addresses);

        // Assert
        handler.LastRequest!.Headers.Accept.Should().Contain(h => h.MediaType == "application/json");
    }

    [Fact]
    public async Task InvokeRequest_WithEmptyResponse_ReturnsNull()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        handler.WithResponse(HttpStatusCode.OK, "", "application/json");

        // Act
        var result = await RequestHelper.InvokeRequest("GET", ApiController.Addresses);

        // Assert
        result.Should().BeNull();
    }

    [Fact]
    public async Task InvokeRequest_WithNullDataInResponse_ReturnsNull()
    {
        // Arrange
        SetupSession();
        var handler = SetupMockHandler();
        handler.WithJsonResponse(@"{""code"": 200, ""success"": true, ""data"": null}");

        // Act
        var result = await RequestHelper.InvokeRequest("GET", ApiController.Addresses, ModelType.Address);

        // Assert
        result.Should().BeNull();
    }
}