using Xunit;
using meilisearch.NET;
using Microsoft.Extensions.Logging;
using meilisearch.NET.Configurations;
using System.Net.Http;
using Moq;
using Meilisearch;
using Microsoft.Extensions.Configuration;
using System.Threading.Tasks;
using System.Collections.Generic;
using meilisearch.NET.Interfaces;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.IO;
using System.Threading;
using System.Collections.ObjectModel;

namespace meilisearch.NET.Tests;

public class MeiliSearchServiceTests
{
    private readonly Mock<HttpClient> _httpClientMock;
    private readonly Mock<ILogger<MeiliSearchService>> _loggerMock;
    private readonly Mock<MeiliSearchConfiguration> _meiliConfigurationMock;
    private readonly MeiliSearchService _meiliSearchService;

    public MeiliSearchServiceTests()
    {
        _httpClientMock = new Mock<HttpClient>();
        _loggerMock = new Mock<ILogger<MeiliSearchService>>();
        _meiliConfigurationMock = new Mock<MeiliSearchConfiguration>();
        _meiliConfigurationMock.Setup(x => x.MeiliPort).Returns(7700);

        _meiliSearchService = new MeiliSearchService(_httpClientMock.Object, _loggerMock.Object, _meiliConfigurationMock.Object);
    }

    [Fact]
    public void Test_Service_Initialized()
    {
        Assert.NotNull(_meiliSearchService);
    }

    [Fact]
    public async Task Test_StartMeilisearch_Success()
    {
        // Mock the process start
        var processMock = new Mock<Process>();
        processMock.Setup(p => p.Start()).Returns(true);

        // Mock the Process.Start method
        Mock<IProcessWrapper> processWrapperMock = new Mock<IProcessWrapper>();
        processWrapperMock.Setup(p => p.Start(It.IsAny<ProcessStartInfo>())).Returns(processMock.Object);

        // Override the GetMeilisearchBinaryName method
        var meiliSearchService = new TestMeiliSearchService(_httpClientMock.Object, _loggerMock.Object, _meiliConfigurationMock.Object, processWrapperMock.Object);

        // Call the StartMeilisearch method
        await meiliSearchService.StartMeilisearch();

        // Assert that the process was started
        processWrapperMock.Verify(p => p.Start(It.IsAny<ProcessStartInfo>()), Times.Once);
    }

    [Fact]
    public void Test_Stop_Success()
    {
        // Mock the process
        var processMock = new Mock<Process>();
        processMock.Setup(p => p.Kill());

        // Set the process to the MeiliSearchService
        _meiliSearchService.process = processMock.Object;

        // Call the Stop method
        _meiliSearchService.Stop();

        // Assert that the process was killed
        processMock.Verify(p => p.Kill(), Times.Once);
    }

    [Fact]
    public void Test_IsMeilisearchRunning_Success()
    {
        // Mock the Process.GetProcessesByName method
        var processMock = new Mock<Process>();
        var processes = new Process[] { processMock.Object };
        Mock<IProcessStaticWrapper> processStaticWrapperMock = new Mock<IProcessStaticWrapper>();
        processStaticWrapperMock.Setup(p => p.GetProcessesByName(It.IsAny<string>())).Returns(processes);

        // Override the GetMeilisearchBinaryName method
        var meiliSearchService = new TestMeiliSearchService(_httpClientMock.Object, _loggerMock.Object, _meiliConfigurationMock.Object, null, processStaticWrapperMock.Object);

        // Call the IsMeilisearchRunning method
        var isRunning = meiliSearchService.IsMeilisearchRunning();

        // Assert that the method returns true
        Assert.True(isRunning);
    }

    [Fact]
    public async Task Test_CreateIndex_Success()
    {
        // Arrange
        var indexName = "test_index";
        var meilisearchClientMock = new Mock<MeilisearchClient>("http://localhost:7700", "masterKey");
        var indexMock = new Mock<Meilisearch.Index>(meilisearchClientMock.Object, indexName);
        var indexes = new List<IndexResponse> { new IndexResponse { Uid = indexName } };

        meilisearchClientMock.Setup(c => c.GetAllIndexesAsync(null, null, It.IsAny<CancellationToken>())).ReturnsAsync(new IndexesResults { Results = new List<IndexResponse>() });
        meilisearchClientMock.Setup(c => c.CreateIndexAsync(indexName, null, It.IsAny<CancellationToken>())).Returns(Task.CompletedTask);
        meilisearchClientMock.Setup(c => c.GetIndexAsync(indexName, It.IsAny<CancellationToken>())).ReturnsAsync(indexMock.Object);
        indexMock.Setup(i => i.UpdateFilterableAttributesAsync(It.IsAny<string[]>(), null, It.IsAny<CancellationToken>())).Returns(Task.CompletedTask);

        // Override the MeilisearchClient
        var meiliSearchService = new TestMeiliSearchService(_httpClientMock.Object, _loggerMock.Object, _meiliConfigurationMock.Object, null, null, meilisearchClientMock.Object);

        // Act
        meiliSearchService.CreateIndex<TestDocument>(indexName);

        // Assert
        meilisearchClientMock.Verify(c => c.CreateIndexAsync(indexName, null, It.IsAny<CancellationToken>()), Times.Once);
    }

    [Fact]
    public async Task Test_DeleteIndex_Success()
    {
        // Arrange
        var indexName = "test_index";
        var meilisearchClientMock = new Mock<MeilisearchClient>("http://localhost:7700", "masterKey");
        var indexMock = new Mock<Meilisearch.Index>(meilisearchClientMock.Object, indexName);
        var indexes = new List<IndexResponse> { new IndexResponse { Uid = indexName } };

        meilisearchClientMock.Setup(c => c.GetAllIndexesAsync(null, null, It.IsAny<CancellationToken>())).ReturnsAsync(new IndexesResults { Results = indexes });
        meilisearchClientMock.Setup(c => c.DeleteIndexAsync(indexName, null, It.IsAny<CancellationToken>())).Returns(Task.CompletedTask);

        // Override the MeilisearchClient
        var meiliSearchService = new TestMeiliSearchService(_httpClientMock.Object, _loggerMock.Object, _meiliConfigurationMock.Object, null, null, meilisearchClientMock.Object);

        // Act
        meiliSearchService.DeleteIndex(indexName);

        // Assert
        meilisearchClientMock.Verify(c => c.DeleteIndexAsync(indexName, null, It.IsAny<CancellationToken>()), Times.Once);
    }

    [Fact]
    public async Task Test_GetAllIndexes_Success()
    {
        // Arrange
        var indexName = "test_index";
        var meilisearchClientMock = new Mock<MeilisearchClient>("http://localhost:7700", "masterKey");
        var indexMock = new Mock<Meilisearch.Index>(meilisearchClientMock.Object, indexName);
        var indexes = new List<IndexResponse> { new IndexResponse { Uid = indexName } };

        meilisearchClientMock.Setup(c => c.GetAllIndexesAsync(null, null, It.IsAny<CancellationToken>())).ReturnsAsync(new IndexesResults { Results = indexes });

        // Override the MeilisearchClient
        var meiliSearchService = new TestMeiliSearchService(_httpClientMock.Object, _loggerMock.Object, _meiliConfigurationMock.Object, null, null, meilisearchClientMock.Object);

        // Act
        var result = meiliSearchService.GetAllIndexes();

        // Assert
        Assert.Contains(indexName, result);
    }

    [Fact]
    public void Test_AddDocument_Success()
    {
        // Arrange
        var indexName = "test_index";
        var document = new TestDocument { Id = "1" };
        var documentCollectionMock = new Mock<ICollection<KeyValuePair<string, IDocument>>>();

        // Override the DocumentCollection
        var meiliSearchService = new TestMeiliSearchService(_httpClientMock.Object, _loggerMock.Object, _meiliConfigurationMock.Object, null, null, null, documentCollectionMock.Object);

        // Act
        meiliSearchService.AddDocument(indexName, document);

        // Assert
        documentCollectionMock.Verify(c => c.Add(It.IsAny<KeyValuePair<string, IDocument>>()), Times.Once);
    }

    [Fact]
    public void Test_Configuration_Dependencies_Success()
    {
        // Arrange
        var httpClient = _httpClientMock.Object;
        var logger = _loggerMock.Object;
        var meiliConfiguration = _meiliConfigurationMock.Object;

        // Act
        var meiliSearchService = new MeiliSearchService(httpClient, logger, meiliConfiguration);

        // Assert
        Assert.NotNull(meiliSearchService);
    }

    [Fact]
    public void Test_GenerateApiKey_Success()
    {
        // Arrange
        var length = 64;

        // Act
        var apiKey = MeiliSearchService.GenerateApiKey(length);

        // Assert
        Assert.NotNull(apiKey);
        Assert.Equal(length, apiKey.Length);
    }

    [Fact]
    public void Test_Dispose_Success()
    {
        // Arrange
        var httpClientMock = new Mock<HttpClient>();
        var processMock = new Mock<Process>();

        // Set the process to the MeiliSearchService
        _meiliSearchService.process = processMock.Object;

        // Act
        _meiliSearchService.Dispose();

        // Assert
        httpClientMock.Verify(c => c.Dispose(), Times.Never); // HttpClient is disposed in base class
        processMock.Verify(p => p.Kill(), Times.Once);
    }
}

// Create a wrapper interface for Process.Start
public interface IProcessWrapper
{
    Process Start(ProcessStartInfo startInfo);
}

// Create a wrapper class for Process.Start
public class ProcessWrapper : IProcessWrapper
{
    public Process Start(ProcessStartInfo startInfo)
    {
        return Process.Start(startInfo);
    }
}

// Create a wrapper interface for Process.GetProcessesByName
public interface IProcessStaticWrapper
{
    Process[] GetProcessesByName(string processName);
}

// Create a wrapper class for Process.GetProcessesByName
public class ProcessStaticWrapper : IProcessStaticWrapper
{
    public Process[] GetProcessesByName(string processName)
    {
        return Process.GetProcessesByName(processName);
    }
}

// Create a test class to override the GetMeilisearchBinaryName method
public class TestMeiliSearchService : MeiliSearchService
{
    private readonly IProcessWrapper _processWrapper;
    private readonly IProcessStaticWrapper _processStaticWrapper;
    private readonly MeilisearchClient _meilisearchClient;
    private readonly ICollection<KeyValuePair<string, IDocument>> _documentCollection;

    public TestMeiliSearchService(HttpClient httpClient, ILogger<MeiliSearchService> logger, MeiliSearchConfiguration meiliConfiguration, IProcessWrapper processWrapper = null, IProcessStaticWrapper processStaticWrapper = null, MeilisearchClient meilisearchClient = null, ICollection<KeyValuePair<string, IDocument>> documentCollection = null) : base(httpClient, logger, meiliConfiguration)
    {
        _processWrapper = processWrapper;
        _processStaticWrapper = processStaticWrapper;
        _meilisearchClient = meilisearchClient;
        _documentCollection = documentCollection;
    }

    public override async Task StartMeilisearch()
    {
        var binaryName = GetMeilisearchBinaryName();
        var binaryPath = Path.Combine(AppContext.BaseDirectory, binaryName);

        if (!File.Exists(binaryPath))
        {
            Logger.LogError($"Meilisearch binary not found at: {binaryPath}");
            throw new FileNotFoundException($"Could not find Meilisearch binary: {binaryName}");
        }

        // Set execute permissions on Unix-like systems
        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
        {
            try
            {
                // Mock the chmod process
                //var chmod = Process.Start("chmod", $"+x {binaryPath}");
                //chmod?.WaitForExit();
            }
            catch (Exception ex)
            {
                Logger.LogWarning($"Failed to set execute permissions on binary: {ex.Message}");
            }
        }
        var host = RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
            ? "localhost"
            : "127.0.0.1";
        var args = "--http-addr " + host + ":" + MeiliConfiguration.MeiliPort
                  + " --env development --db-path "
                  + Path.Combine(AppContext.BaseDirectory, binaryName);
        
        var processStartInfo = new ProcessStartInfo
        {
            FileName = binaryPath,
            Arguments = args,
            UseShellExecute = false,
            RedirectStandardOutput = false,
            RedirectStandardError = false,
            CreateNoWindow = false,
        };

        // Use the mocked Process.Start method
        process = _processWrapper.Start(processStartInfo);
        await Task.Delay(5000); // Wait for the process to start
        Logger.LogInformation($"Started Meilisearch process using binary: {binaryName}");
    }

    public override string GetMeilisearchBinaryName()
    {
        return "meilisearch-mock";
    }

    public override bool IsMeilisearchRunning()
    {
        // Mock the Process.GetProcessesByName method
        var processName = RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
            ? "meilisearch-windows"
            : "meilisearch";
        var processes = _processStaticWrapper.GetProcessesByName(processName);
        return processes.Any();
    }

    public override async Task<IndexesResults> GetAllIndexesAsync(CancellationToken cancellationToken = default)
    {
        return _meilisearchClient.GetAllIndexesAsync(null, null, cancellationToken);
    }

    public override async Task CreateIndexAsync(string indexName, string primaryKey = null, CancellationToken cancellationToken = default)
    {
        return _meilisearchClient.CreateIndexAsync(indexName, primaryKey, cancellationToken);
    }

    public override async Task DeleteIndexAsync(string indexName, CancellationToken cancellationToken = default)
    {
        return _meilisearchClient.DeleteIndexAsync(indexName, cancellationToken);
    }

    public override async Task<Index> GetIndexAsync(string indexName, CancellationToken cancellationToken = default)
    {
        return _meilisearchClient.GetIndexAsync(indexName, cancellationToken);
    }

    private ILogger<MeiliSearchService> Logger
    {
        get { return _logger; }
    }

    private MeiliSearchConfiguration MeiliConfiguration
    {
        get { return _meiliConfiguration; }
    }

    private string ApiKey
    {
        get { return _apiKey; }
    }

    protected override ObservableCollection<KeyValuePair<string, IDocument>> DocumentCollection
    {
        get
        {
            return _documentCollection as ObservableCollection<KeyValuePair<string, IDocument>>;
        }
    }

    protected virtual void Dispose(bool disposing)
    {
        //base.Dispose(disposing);
    }
}

public class TestDocument : IDocument
{
    public new string Id { get; set; }
}