using System.Security.Claims;
using JdeScoping.Api.Controllers;
using JdeScoping.Api.Hubs;
using JdeScoping.Core.Interfaces;
using JdeScoping.Core.Models;
using JdeScoping.Core.Models.Enums;
using JdeScoping.Core.Models.Search;
using JdeScoping.Core.ViewModels;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.SignalR;
using Microsoft.Extensions.Logging;
using NSubstitute;
using Shouldly;

namespace JdeScoping.Api.Tests.Controllers;

public class SearchControllerTests
{
    private readonly ILotFinderRepository _repository;
    private readonly IHubContext<StatusHub> _hubContext;
    private readonly ILogger<SearchController> _logger;
    private readonly TimeProvider _timeProvider;
    private readonly SearchController _controller;

    public SearchControllerTests()
    {
        _repository = Substitute.For<ILotFinderRepository>();
        _hubContext = Substitute.For<IHubContext<StatusHub>>();
        _logger = Substitute.For<ILogger<SearchController>>();
        _timeProvider = TimeProvider.System;
        _controller = new SearchController(_repository, _hubContext, _logger, _timeProvider);
        SetupAuthenticatedUser("testuser");
    }

    [Fact]
    public async Task GetSearches_ReturnsUserSearches_OrderedByStartDtDescending()
    {
        // Arrange
        var searches = new List<Search>
        {
            new Search { Id = 1, Name = "Search 1", UserName = "testuser", StartDt = DateTime.Now.AddHours(-2) },
            new Search { Id = 2, Name = "Search 2", UserName = "testuser", StartDt = DateTime.Now }
        };
        _repository.GetUserSearchesAsync("testuser", Arg.Any<CancellationToken>())
            .Returns(searches);

        // Act
        var result = await _controller.GetSearches(CancellationToken.None);

        // Assert
        result.Result.ShouldBeOfType<OkObjectResult>();
        var okResult = (OkObjectResult)result.Result!;
        var viewModels = okResult.Value.ShouldBeAssignableTo<IEnumerable<SearchViewModel>>()!.ToList();
        viewModels.Count.ShouldBe(2);
        viewModels[0].Id.ShouldBe(2); // Most recent first
        viewModels[1].Id.ShouldBe(1);
    }

    [Fact]
    public async Task CreateSearch_SavesAndPublishesToSignalR()
    {
        // Arrange
        var viewModel = new SearchViewModel
        {
            Name = "New Search",
            Status = SearchStatus.New,
            Criteria = new SearchCriteria()
        };
        _repository.SubmitSearchAsync(Arg.Any<Search>(), Arg.Any<CancellationToken>())
            .Returns(42);

        var clientProxy = Substitute.For<IClientProxy>();
        var hubClients = Substitute.For<IHubClients>();
        hubClients.All.Returns(clientProxy);
        _hubContext.Clients.Returns(hubClients);

        // Act
        var result = await _controller.CreateSearch(viewModel, CancellationToken.None);

        // Assert
        result.Result.ShouldBeOfType<CreatedAtActionResult>();
        var createdResult = (CreatedAtActionResult)result.Result!;
        createdResult.Value.ShouldBe(42);

        await _repository.Received(1).SubmitSearchAsync(
            Arg.Is<Search>(s => s.Name == "New Search" && s.UserName == "testuser"),
            Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task CopySearch_ResetsStatusAndTimestamps()
    {
        // Arrange
        var original = new Search
        {
            Id = 1,
            Name = "Original Search",
            UserName = "otheruser",
            Status = SearchStatus.Ended,
            SubmitDt = DateTime.Now.AddHours(-2),
            StartDt = DateTime.Now.AddHours(-2),
            EndDt = DateTime.Now.AddHours(-1),
            CriteriaJson = "{}"
        };
        _repository.GetSearchAsync(1, Arg.Any<CancellationToken>())
            .Returns(original);
        _repository.SubmitSearchAsync(Arg.Any<Search>(), Arg.Any<CancellationToken>())
            .Returns(42);

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

        // Assert - CopySearch returns Ok with a copy, doesn't persist
        var okResult = result.Result.ShouldBeOfType<OkObjectResult>();
        var viewModel = okResult.Value.ShouldBeOfType<SearchViewModel>();
        viewModel.Status.ShouldBe(SearchStatus.New);
        viewModel.UserName.ShouldBe("testuser");
        viewModel.Name.ShouldBe("Original Search");
        viewModel.SubmitDt.ShouldBeNull();
        viewModel.StartDt.ShouldBeNull();
        viewModel.EndDt.ShouldBeNull();

        // CopySearch does NOT persist - it just returns a copy
        await _repository.DidNotReceive().SubmitSearchAsync(
            Arg.Is<Search>(s =>
                s.Status == SearchStatus.New &&
                s.UserName == "testuser" &&
                s.SubmitDt == null &&
                s.StartDt == null &&
                s.EndDt == null &&
                s.Name == "Original Search"),
            Arg.Any<CancellationToken>());
    }

    [Fact]
    public async Task GetResults_ReturnsFileWithCorrectContentType()
    {
        // Arrange
        var excelData = new byte[] { 1, 2, 3, 4, 5 };
        _repository.GetSearchResultsAsync(1, Arg.Any<CancellationToken>())
            .Returns(excelData);

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

        // Assert
        result.ShouldBeOfType<FileContentResult>();
        var fileResult = (FileContentResult)result;
        fileResult.ContentType.ShouldBe("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        fileResult.FileDownloadName.ShouldBe("search_results.xlsx");
        fileResult.FileContents.ShouldBe(excelData);
    }

    [Fact]
    public async Task GetResults_WhenNoResults_Returns404()
    {
        // Arrange
        _repository.GetSearchResultsAsync(1, Arg.Any<CancellationToken>())
            .Returns((byte[]?)null);

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

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

    [Fact]
    public async Task GetSearch_WhenNotFound_Returns404()
    {
        // Arrange
        _repository.GetSearchAsync(999, Arg.Any<CancellationToken>())
            .Returns((Search?)null);

        // Act
        var result = await _controller.GetSearch(999, CancellationToken.None);

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

    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 };
    }
}