using System.Security.Claims;
using JdeScoping.Api.Contracts.ManualSync;
using JdeScoping.Api.Controllers;
using JdeScoping.DataAccess.Services;
using JdeScoping.DataSync.Configuration;
using JdeScoping.DataSync.Services;
using JdeScoping.Domain.Models;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using NSubstitute;
using Shouldly;
using Xunit;

namespace JdeScoping.Api.Tests.Controllers;

public class ManualSyncControllerTests
{
    private readonly IManualSyncRequestService _manualSyncRequestService;
    private readonly IPipelineRegistry _pipelineRegistry;
    private readonly ManualSyncController _controller;

    public ManualSyncControllerTests()
    {
        _manualSyncRequestService = Substitute.For<IManualSyncRequestService>();
        _pipelineRegistry = Substitute.For<IPipelineRegistry>();
        _controller = new ManualSyncController(_manualSyncRequestService, _pipelineRegistry);
        SetupAuthenticatedUser("testuser");
    }

    #region GetRequests Tests

    [Fact]
    public async Task GetRequests_ReturnsOkWithRequests()
    {
        // Arrange
        var requests = new List<ManualSyncRequest>
        {
            CreateRequest(1, "Pipeline1", "mass", "user1", DateTime.UtcNow.AddHours(-2)),
            CreateRequest(2, "Pipeline2", "daily", "user2", DateTime.UtcNow.AddHours(-1))
        };
        _manualSyncRequestService.GetRequestsAsync(false, Arg.Any<CancellationToken>())
            .Returns(requests);

        // Act
        var result = await _controller.GetRequests(false, CancellationToken.None);

        // Assert
        result.Result.ShouldBeOfType<OkObjectResult>();
        var okResult = (OkObjectResult)result.Result!;
        var viewModels = okResult.Value.ShouldBeAssignableTo<List<ManualSyncRequestViewModel>>()!;
        viewModels.Count.ShouldBe(2);
        viewModels[0].Id.ShouldBe(1);
        viewModels[0].PipelineName.ShouldBe("Pipeline1");
        viewModels[1].Id.ShouldBe(2);
        viewModels[1].PipelineName.ShouldBe("Pipeline2");
    }

    [Fact]
    public async Task GetRequests_WithPendingOnlyTrue_PassesPendingOnlyToService()
    {
        // Arrange
        _manualSyncRequestService.GetRequestsAsync(true, Arg.Any<CancellationToken>())
            .Returns(new List<ManualSyncRequest>());

        // Act
        await _controller.GetRequests(true, CancellationToken.None);

        // Assert
        await _manualSyncRequestService.Received(1)
            .GetRequestsAsync(true, Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task GetRequests_MapsRowVersionToBase64()
    {
        // Arrange
        var rowVersion = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
        var request = CreateRequest(1, "Pipeline1", "mass", "user1", DateTime.UtcNow, rowVersion: rowVersion);
        _manualSyncRequestService.GetRequestsAsync(false, Arg.Any<CancellationToken>())
            .Returns(new List<ManualSyncRequest> { request });

        // Act
        var result = await _controller.GetRequests(false, CancellationToken.None);

        // Assert
        var okResult = (OkObjectResult)result.Result!;
        var viewModels = okResult.Value.ShouldBeAssignableTo<List<ManualSyncRequestViewModel>>()!;
        viewModels[0].RowVersionBase64.ShouldBe(Convert.ToBase64String(rowVersion));
    }

    #endregion

    #region GetPipelines Tests

    [Fact]
    public void GetPipelines_ReturnsOkWithPipelines()
    {
        // Arrange
        var pipelines = new List<EtlPipelineConfig>
        {
            CreatePipeline("WorkOrders", massSyncInterval: 1440, dailySyncInterval: 60, hourlySyncInterval: 15),
            CreatePipeline("Items", massSyncInterval: 1440, dailySyncInterval: 60)
        };
        _pipelineRegistry.GetEnabledPipelines().Returns(pipelines);

        // Act
        var result = _controller.GetPipelines();

        // Assert
        result.Result.ShouldBeOfType<OkObjectResult>();
        var okResult = (OkObjectResult)result.Result!;
        var viewModels = okResult.Value.ShouldBeAssignableTo<List<PipelineInfoViewModel>>()!;
        viewModels.Count.ShouldBe(2);
        viewModels[0].Name.ShouldBe("Items");
        viewModels[0].SupportedSyncTypes.ShouldContain("mass");
        viewModels[0].SupportedSyncTypes.ShouldContain("daily");
        viewModels[1].Name.ShouldBe("WorkOrders");
        viewModels[1].SupportedSyncTypes.ShouldContain("mass");
        viewModels[1].SupportedSyncTypes.ShouldContain("daily");
        viewModels[1].SupportedSyncTypes.ShouldContain("hourly");
    }

    [Fact]
    public void GetPipelines_WhenEmpty_ReturnsEmptyList()
    {
        // Arrange
        _pipelineRegistry.GetEnabledPipelines().Returns(new List<EtlPipelineConfig>());

        // Act
        var result = _controller.GetPipelines();

        // Assert
        var okResult = (OkObjectResult)result.Result!;
        var viewModels = okResult.Value.ShouldBeAssignableTo<List<PipelineInfoViewModel>>()!;
        viewModels.ShouldBeEmpty();
    }

    #endregion

    #region CreateRequest Tests

    [Fact]
    public async Task CreateRequest_WithValidInput_ReturnsCreated()
    {
        // Arrange
        var dto = new CreateManualSyncRequestDto
        {
            PipelineName = "WorkOrders",
            SyncType = "mass"
        };
        var createdRequest = CreateRequest(42, "WorkOrders", "mass", "testuser", DateTime.UtcNow);

        _pipelineRegistry.IsValidPipelineAndSyncType("WorkOrders", "mass").Returns(true);
        _manualSyncRequestService.CreateRequestAsync("WorkOrders", "mass", "testuser", Arg.Any<CancellationToken>())
            .Returns(createdRequest);

        // Act
        var result = await _controller.CreateRequest(dto, CancellationToken.None);

        // Assert
        result.Result.ShouldBeOfType<CreatedAtActionResult>();
        var createdResult = (CreatedAtActionResult)result.Result!;
        var viewModel = createdResult.Value.ShouldBeOfType<ManualSyncRequestViewModel>();
        viewModel.Id.ShouldBe(42);
        viewModel.PipelineName.ShouldBe("WorkOrders");
        viewModel.SyncType.ShouldBe("mass");
        viewModel.RequestedBy.ShouldBe("testuser");
    }

    [Fact]
    public async Task CreateRequest_WithInvalidPipelineOrSyncType_ReturnsBadRequest()
    {
        // Arrange
        var dto = new CreateManualSyncRequestDto
        {
            PipelineName = "InvalidPipeline",
            SyncType = "invalid"
        };
        _pipelineRegistry.IsValidPipelineAndSyncType("InvalidPipeline", "invalid").Returns(false);

        // Act
        var result = await _controller.CreateRequest(dto, CancellationToken.None);

        // Assert
        result.Result.ShouldBeOfType<BadRequestObjectResult>();
        var badRequestResult = (BadRequestObjectResult)result.Result!;
        badRequestResult.Value.ShouldBeOfType<string>();
        ((string)badRequestResult.Value!).ShouldContain("Invalid pipeline/sync type combination");
    }

    [Fact]
    public async Task CreateRequest_WhenUnauthenticated_ReturnsUnauthorized()
    {
        // Arrange
        SetupUnauthenticatedUser();
        var dto = new CreateManualSyncRequestDto
        {
            PipelineName = "WorkOrders",
            SyncType = "mass"
        };

        // Act
        var result = await _controller.CreateRequest(dto, CancellationToken.None);

        // Assert
        result.Result.ShouldBeOfType<UnauthorizedResult>();
    }

    [Fact]
    public async Task CreateRequest_PassesCorrectUsernameToService()
    {
        // Arrange
        var dto = new CreateManualSyncRequestDto
        {
            PipelineName = "WorkOrders",
            SyncType = "daily"
        };
        var createdRequest = CreateRequest(1, "WorkOrders", "daily", "testuser", DateTime.UtcNow);

        _pipelineRegistry.IsValidPipelineAndSyncType("WorkOrders", "daily").Returns(true);
        _manualSyncRequestService.CreateRequestAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<string>(), Arg.Any<CancellationToken>())
            .Returns(createdRequest);

        // Act
        await _controller.CreateRequest(dto, CancellationToken.None);

        // Assert
        await _manualSyncRequestService.Received(1)
            .CreateRequestAsync("WorkOrders", "daily", "testuser", Arg.Any<CancellationToken>());
    }

    #endregion

    #region CancelRequest Tests

    [Fact]
    public async Task CancelRequest_WhenSuccessful_ReturnsOk()
    {
        // Arrange
        var rowVersion = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
        var dto = new CancelManualSyncRequestDto
        {
            RowVersionBase64 = Convert.ToBase64String(rowVersion)
        };
        _manualSyncRequestService.CancelRequestAsync(1, "testuser", Arg.Any<byte[]>(), Arg.Any<CancellationToken>())
            .Returns(true);

        // Act
        var result = await _controller.CancelRequest(1, dto, CancellationToken.None);

        // Assert
        result.ShouldBeOfType<OkObjectResult>();
    }

    [Fact]
    public async Task CancelRequest_WhenConcurrencyFails_ReturnsConflict()
    {
        // Arrange
        var rowVersion = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
        var dto = new CancelManualSyncRequestDto
        {
            RowVersionBase64 = Convert.ToBase64String(rowVersion)
        };
        _manualSyncRequestService.CancelRequestAsync(1, "testuser", Arg.Any<byte[]>(), Arg.Any<CancellationToken>())
            .Returns(false);

        // Act
        var result = await _controller.CancelRequest(1, dto, CancellationToken.None);

        // Assert
        result.ShouldBeOfType<ConflictObjectResult>();
    }

    [Fact]
    public async Task CancelRequest_WithInvalidBase64_ReturnsBadRequest()
    {
        // Arrange
        var dto = new CancelManualSyncRequestDto
        {
            RowVersionBase64 = "not-valid-base64!!!"
        };

        // Act
        var result = await _controller.CancelRequest(1, dto, CancellationToken.None);

        // Assert
        result.ShouldBeOfType<BadRequestObjectResult>();
        var badRequest = (BadRequestObjectResult)result;
        badRequest.Value.ShouldBeOfType<string>();
        ((string)badRequest.Value!).ShouldContain("Invalid RowVersionBase64 format");
    }

    [Fact]
    public async Task CancelRequest_WhenUnauthenticated_ReturnsUnauthorized()
    {
        // Arrange
        SetupUnauthenticatedUser();
        var dto = new CancelManualSyncRequestDto
        {
            RowVersionBase64 = Convert.ToBase64String(new byte[] { 1, 2, 3 })
        };

        // Act
        var result = await _controller.CancelRequest(1, dto, CancellationToken.None);

        // Assert
        result.ShouldBeOfType<UnauthorizedResult>();
    }

    [Fact]
    public async Task CancelRequest_PassesCorrectParametersToService()
    {
        // Arrange
        var rowVersion = new byte[] { 10, 20, 30, 40 };
        var dto = new CancelManualSyncRequestDto
        {
            RowVersionBase64 = Convert.ToBase64String(rowVersion)
        };
        _manualSyncRequestService.CancelRequestAsync(Arg.Any<int>(), Arg.Any<string>(), Arg.Any<byte[]>(), Arg.Any<CancellationToken>())
            .Returns(true);

        // Act
        await _controller.CancelRequest(99, dto, CancellationToken.None);

        // Assert
        await _manualSyncRequestService.Received(1)
            .CancelRequestAsync(
                99,
                "testuser",
                Arg.Is<byte[]>(b => b.SequenceEqual(rowVersion)),
                Arg.Any<CancellationToken>());
    }

    #endregion

    #region Helper Methods

    private void SetupAuthenticatedUser(string username)
    {
        var claims = new List<Claim>
        {
            new(ClaimTypes.Name, username),
            new("dn", $"CN={username},DC=example,DC=com")
        };
        var identity = new ClaimsIdentity(claims, "Test");
        var principal = new ClaimsPrincipal(identity);

        var httpContext = new DefaultHttpContext { User = principal };
        _controller.ControllerContext = new ControllerContext { HttpContext = httpContext };
    }

    private void SetupUnauthenticatedUser()
    {
        var identity = new ClaimsIdentity(); // No claims, not authenticated
        var principal = new ClaimsPrincipal(identity);

        var httpContext = new DefaultHttpContext { User = principal };
        _controller.ControllerContext = new ControllerContext { HttpContext = httpContext };
    }

    private static ManualSyncRequest CreateRequest(
        int id,
        string pipelineName,
        string syncType,
        string requestedBy,
        DateTime requestDT,
        DateTime? completedDT = null,
        DateTime? cancelDT = null,
        string? cancelledBy = null,
        byte[]? rowVersion = null)
    {
        return new ManualSyncRequest
        {
            Id = id,
            PipelineName = pipelineName,
            SyncType = syncType,
            RequestedBy = requestedBy,
            RequestDT = requestDT,
            CompletedDT = completedDT,
            CancelDT = cancelDT,
            CancelledBy = cancelledBy,
            RowVersion = rowVersion ?? new byte[] { 0, 0, 0, 0, 0, 0, 0, 1 }
        };
    }

    private static EtlPipelineConfig CreatePipeline(
        string name,
        int? massSyncInterval = null,
        int? dailySyncInterval = null,
        int? hourlySyncInterval = null,
        bool isEnabled = true)
    {
        return new EtlPipelineConfig
        {
            Name = name,
            IsEnabled = isEnabled,
            MassSyncIntervalMinutes = massSyncInterval,
            DailySyncIntervalMinutes = dailySyncInterval,
            HourlySyncIntervalMinutes = hourlySyncInterval
        };
    }

    #endregion
}