namespace MeetTheTeacher.Export;

/// <summary>
///     Base class for exporters which write data to a file
/// </summary>
public abstract class FileExporterBase
{
    /// <summary>
    ///     File extension of the exported file including the dot
    /// </summary>
    protected abstract string FileExtension { get; }
    
    /// <summary>
    ///     Exports the given content to a file with the given name.
    ///     If the file already exists, it will be overwritten.
    /// </summary>
    /// <param name="fileName">Name of the file to export without the extension</param>
    /// <param name="content">Content to write into the file</param>
    protected void Export(string fileName, string content)
    {
        string filePath = GetFilePath(fileName);
        File.WriteAllText(filePath, content);
    }

    /// <summary>
    ///     Joins several lines into one text, separated by line breaks
    /// </summary>
    /// <param name="lines">Lines to merge</param>
    /// <returns>A text containing all lines</returns>
    protected static string LinesToText(IEnumerable<string> lines) => string.Join(Environment.NewLine, lines);

    private string GetFilePath(string fileName)
    {
        return Path.Combine(Directory.GetCurrentDirectory(), $"{fileName}{FileExtension}");
    }
}