using System.CommandLine;
using JdeScoping.ConfigManager.Cli.Commands;
using JdeScoping.ConfigManager.Core.Models;
using JdeScoping.ConfigManager.Core.Services;
using JdeScoping.DataSync.Configuration;
using Microsoft.Extensions.DependencyInjection;

namespace JdeScoping.ConfigManager.Cli.Tests.Commands;

[Collection("Console Tests")]
public class ValidateCommandTests
{
    private readonly IServiceProvider _serviceProvider;
    private readonly IConfigFileService _configFileService;
    private readonly IAutoDiscoveryService _autoDiscoveryService;
    private readonly IValidationService _validationService;
    private readonly IRuntimeConfigValidationService _runtimeValidationService;
    private readonly Option<string?> _configPathOption;
    private readonly Option<bool> _verboseOption;
    private readonly Option<bool> _quietOption;

    public ValidateCommandTests()
    {
        _configFileService = Substitute.For<IConfigFileService>();
        _autoDiscoveryService = Substitute.For<IAutoDiscoveryService>();
        _validationService = Substitute.For<IValidationService>();
        _runtimeValidationService = Substitute.For<IRuntimeConfigValidationService>();

        var services = new ServiceCollection();
        services.AddSingleton(_configFileService);
        services.AddSingleton(_autoDiscoveryService);
        services.AddSingleton(_validationService);
        services.AddSingleton(_runtimeValidationService);
        services.AddTestLogging();
        _serviceProvider = services.BuildServiceProvider();

        _configPathOption = new Option<string?>(["--config-path", "-c"]);
        _verboseOption = new Option<bool>(["--verbose", "-v"]);
        _quietOption = new Option<bool>(["--quiet", "-q"]);
    }

    [Fact]
    public void CreateAppSettingsCommand_ReturnsCommand()
    {
        // Act
        var command = ValidateCommand.CreateAppSettingsCommand(
            _serviceProvider, _configPathOption, _verboseOption, _quietOption);

        // Assert
        command.ShouldNotBeNull();
        command.Name.ShouldBe("appsettings");
        command.Description.ShouldBe("Validate appsettings.json");
    }

    [Fact]
    public void CreatePipelinesCommand_ReturnsCommand()
    {
        // Act
        var command = ValidateCommand.CreatePipelinesCommand(
            _serviceProvider, _configPathOption, _verboseOption, _quietOption);

        // Assert
        command.ShouldNotBeNull();
        command.Name.ShouldBe("pipelines");
        command.Description.ShouldBe("Validate pipeline configuration files");
    }

    [Fact]
    public void CreateAllCommand_ReturnsCommand()
    {
        // Act
        var command = ValidateCommand.CreateAllCommand(
            _serviceProvider, _configPathOption, _verboseOption, _quietOption);

        // Assert
        command.ShouldNotBeNull();
        command.Name.ShouldBe("all");
        command.Description.ShouldBe("Validate all configuration files");
    }

    [Fact]
    public void CreateRuntimeCommand_ReturnsCommand()
    {
        // Act
        var command = ValidateCommand.CreateRuntimeCommand(
            _serviceProvider, _configPathOption, _verboseOption, _quietOption);

        // Assert
        command.ShouldNotBeNull();
        command.Name.ShouldBe("runtime");
        command.Description.ShouldBe("Run Infrastructure validators");
    }

    [Fact]
    public async Task AppSettingsCommand_WithNoConfigFolder_ReturnsError()
    {
        // Arrange
        _autoDiscoveryService.FindConfigFolderAsync(Arg.Any<CancellationToken>())
            .Returns(Task.FromResult<string?>(null));

        var command = ValidateCommand.CreateAppSettingsCommand(
            _serviceProvider, _configPathOption, _verboseOption, _quietOption);
        var rootCommand = new RootCommand { command };
        rootCommand.AddGlobalOption(_configPathOption);
        rootCommand.AddGlobalOption(_verboseOption);
        rootCommand.AddGlobalOption(_quietOption);

        // Act
        var exitCode = await rootCommand.InvokeAsync(["appsettings"]);

        // Assert - command completes without throwing
        command.ShouldNotBeNull();
    }

    [Fact]
    public async Task AppSettingsCommand_WithValidConfig_ReturnsSuccess()
    {
        // Arrange
        var tempDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
        Directory.CreateDirectory(tempDir);
        var appSettingsPath = Path.Combine(tempDir, "appsettings.json");
        File.WriteAllText(appSettingsPath, "{}");

        try
        {
            _autoDiscoveryService.FindConfigFolderAsync(Arg.Any<CancellationToken>())
                .Returns(Task.FromResult<string?>(tempDir));

            var config = new ConfigModel();
            _configFileService.LoadAppSettingsAsync(appSettingsPath, Arg.Any<CancellationToken>())
                .Returns(Task.FromResult(config));

            _validationService.ValidateAppSettings(config)
                .Returns(new ValidationResult()); // No errors = IsValid true

            var command = ValidateCommand.CreateAppSettingsCommand(
                _serviceProvider, _configPathOption, _verboseOption, _quietOption);
            var rootCommand = new RootCommand { command };
            rootCommand.AddGlobalOption(_configPathOption);
            rootCommand.AddGlobalOption(_verboseOption);
            rootCommand.AddGlobalOption(_quietOption);

            // Capture console output
            var originalOut = Console.Out;
            using var writer = new StringWriter();
            Console.SetOut(writer);

            try
            {
                // Act
                await rootCommand.InvokeAsync(["appsettings"]);

                // Assert
                var output = writer.ToString();
                output.ShouldContain("Valid");
            }
            finally
            {
                Console.SetOut(originalOut);
            }
        }
        finally
        {
            Directory.Delete(tempDir, true);
        }
    }

    [Fact]
    public async Task AppSettingsCommand_WithInvalidConfig_ReturnsErrors()
    {
        // Arrange
        var tempDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
        Directory.CreateDirectory(tempDir);
        var appSettingsPath = Path.Combine(tempDir, "appsettings.json");
        File.WriteAllText(appSettingsPath, "{}");

        try
        {
            _autoDiscoveryService.FindConfigFolderAsync(Arg.Any<CancellationToken>())
                .Returns(Task.FromResult<string?>(tempDir));

            var config = new ConfigModel();
            _configFileService.LoadAppSettingsAsync(appSettingsPath, Arg.Any<CancellationToken>())
                .Returns(Task.FromResult(config));

            var result = new ValidationResult();
            result.Errors.Add("Connection string 'LocalCache' is required");
            _validationService.ValidateAppSettings(config).Returns(result);

            var command = ValidateCommand.CreateAppSettingsCommand(
                _serviceProvider, _configPathOption, _verboseOption, _quietOption);
            var rootCommand = new RootCommand { command };
            rootCommand.AddGlobalOption(_configPathOption);
            rootCommand.AddGlobalOption(_verboseOption);
            rootCommand.AddGlobalOption(_quietOption);

            // Capture console output (Serilog writes all output to stdout)
            var originalOut = Console.Out;
            using var writer = new StringWriter();
            Console.SetOut(writer);

            try
            {
                // Act
                await rootCommand.InvokeAsync(["appsettings"]);

                // Assert
                var output = writer.ToString();
                output.ShouldContain("Connection string 'LocalCache' is required");
            }
            finally
            {
                Console.SetOut(originalOut);
            }
        }
        finally
        {
            Directory.Delete(tempDir, true);
        }
    }

    [Fact]
    public async Task PipelinesCommand_WithValidPipelines_ReturnsSuccess()
    {
        // Arrange
        var tempDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
        Directory.CreateDirectory(tempDir);
        var pipelinesDir = Path.Combine(tempDir, "Pipelines");
        Directory.CreateDirectory(pipelinesDir);

        try
        {
            _autoDiscoveryService.FindConfigFolderAsync(Arg.Any<CancellationToken>())
                .Returns(Task.FromResult<string?>(tempDir));

            var pipelines = new Dictionary<string, EtlPipelineConfig>
            {
                ["TestPipeline"] = new EtlPipelineConfig { Name = "TestPipeline" }
            };

            _configFileService.LoadAllPipelinesAsync(pipelinesDir, Arg.Any<CancellationToken>())
                .Returns(Task.FromResult(pipelines));

            _validationService.ValidatePipelines(pipelines)
                .Returns(new ValidationResult()); // No errors = IsValid true

            var command = ValidateCommand.CreatePipelinesCommand(
                _serviceProvider, _configPathOption, _verboseOption, _quietOption);
            var rootCommand = new RootCommand { command };
            rootCommand.AddGlobalOption(_configPathOption);
            rootCommand.AddGlobalOption(_verboseOption);
            rootCommand.AddGlobalOption(_quietOption);

            // Capture console output
            var originalOut = Console.Out;
            using var writer = new StringWriter();
            Console.SetOut(writer);

            try
            {
                // Act
                await rootCommand.InvokeAsync(["pipelines"]);

                // Assert
                var output = writer.ToString();
                output.ShouldContain("Valid");
            }
            finally
            {
                Console.SetOut(originalOut);
            }
        }
        finally
        {
            Directory.Delete(tempDir, true);
        }
    }

    [Fact]
    public async Task RuntimeCommand_WithNoConfigFolder_ReturnsError()
    {
        // Arrange
        _autoDiscoveryService.FindConfigFolderAsync(Arg.Any<CancellationToken>())
            .Returns(Task.FromResult<string?>(null));

        var command = ValidateCommand.CreateRuntimeCommand(
            _serviceProvider, _configPathOption, _verboseOption, _quietOption);
        var rootCommand = new RootCommand { command };
        rootCommand.AddGlobalOption(_configPathOption);
        rootCommand.AddGlobalOption(_verboseOption);
        rootCommand.AddGlobalOption(_quietOption);

        // Act
        var exitCode = await rootCommand.InvokeAsync(["runtime"]);

        // Assert - command completes without throwing
        command.ShouldNotBeNull();
    }
}