namespace DevicesRestApi.Helpers;

public class DeviceConfigurationFile
{
    private readonly string _rootDirectory;

    private readonly string _deviceName;

    private const string SettingsFilename = "settings.conf";

    private readonly AppSettings _appSettings;

    public DeviceConfigurationFile(
        string deviceName,
        AppSettings appSettings
    ) {
        _deviceName = deviceName;
        if (string.IsNullOrEmpty(_deviceName))
        {
            throw new ArgumentException("The provided device name is null or empty.");
        }

        _appSettings = appSettings;
        var rootPath = _appSettings.RootPath;
        if (string.IsNullOrEmpty(rootPath))
        {
            throw new ArgumentException("Root path is not configured.");
        }

        _rootDirectory = Path.Combine(rootPath, "devices");
        if (!Directory.Exists(_rootDirectory))
        {
            throw new ArgumentException($"Devices directory doesn't exist: {_rootDirectory}.");
        }
    }

    public string GetDirectoryPath()
    {
        return Path.Combine(_rootDirectory, _deviceName);
    }

    public string GetFilePath()
    {
        return Path.Combine(GetDirectoryPath(), SettingsFilename);
    }

    public bool FileExists()
    {
        return File.Exists(GetFilePath());
    }

    public bool DirectoryExists()
    {
        return Directory.Exists(GetDirectoryPath());
    }

    private void CreateDirectory()
    {
        Directory.CreateDirectory(GetDirectoryPath());
    }

    private void CreateFile()
    {
        using (FileStream fs = File.Create(GetFilePath()))
        {
            // The file is created and opened, we don't need to write anything to it
        }
    }

    public void Create()
    {
        if (!DirectoryExists())
        {
            CreateDirectory();
        }
        if (!FileExists())
        {
            CreateFile();
        }
    }
}