namespace CommanderApp;

public class MockFileSystemService : IFileSystemService
{
    public string MockRootPath { get; set; } = "/mock/root";
    
    private readonly Dictionary<string, List<FileSystemItem>> _mockDirectories = new();

    public MockFileSystemService()
    {
        // Инициализируем mock данными
        SetupMockData();
    }

    private void SetupMockData()
    {
        _mockDirectories["/mock/root"] = new List<FileSystemItem>
        {
            new FileSystemItem { Name = "Documents", FullName = "/mock/root/Documents", IsDirectory = true },
            new FileSystemItem { Name = "Pictures", FullName = "/mock/root/Pictures", IsDirectory = true },
            new FileSystemItem { Name = "readme.txt", FullName = "/mock/root/readme.txt", IsDirectory = false },
            new FileSystemItem { Name = "..", FullName = "/mock", IsDirectory = true }
        };

        _mockDirectories["/mock/root/Documents"] = new List<FileSystemItem>
        {
            new FileSystemItem { Name = "Project1", FullName = "/mock/root/Documents/Project1", IsDirectory = true },
            new FileSystemItem { Name = "Project2", FullName = "/mock/root/Documents/Project2", IsDirectory = true },
            new FileSystemItem { Name = "notes.txt", FullName = "/mock/root/Documents/notes.txt", IsDirectory = false },
            new FileSystemItem { Name = "..", FullName = "/mock/root", IsDirectory = true }
        };

        _mockDirectories["/mock/root/Pictures"] = new List<FileSystemItem>
        {
            new FileSystemItem { Name = "vacation.jpg", FullName = "/mock/root/Pictures/vacation.jpg", IsDirectory = false },
            new FileSystemItem { Name = "..", FullName = "/mock/root", IsDirectory = true }
        };
    }

    public string GetRootPath()
    {
        return MockRootPath;
    }

    public IEnumerable<FileSystemItem> GetDirectoryContents(string path)
    {
        if (_mockDirectories.ContainsKey(path))
        {
            return _mockDirectories[path];
        }

        // Если директории нет в mock данных, возвращаем пустой список с ".."
        var parent = GetParentPath(path);
        if (parent != null)
        {
            return new List<FileSystemItem>
            {
                new FileSystemItem { Name = "..", FullName = parent, IsDirectory = true }
            };
        }

        return Enumerable.Empty<FileSystemItem>();
    }

    // Метод для добавления mock данных в тестах
    public void AddMockDirectory(string path, List<FileSystemItem> items)
    {
        _mockDirectories[path] = items;
    }

    private string GetParentPath(string path)
    {
        var separator = '/';
        var lastSeparator = path.LastIndexOf(separator);
        if (lastSeparator > 0)
        {
            return path.Substring(0, lastSeparator);
        }
        return null;
    }
}