using System;
using System.IO;
using System.Linq;

using Microsoft.Extensions.Configuration;

using Icarus.Models;

namespace Icarus.Controllers.Managers
{
	public class DirectoryManager : BaseManager
    	{
 		#region Fields
		private IConfiguration _config;
        	private Song _song;
		private string _rootSongDirectory;
		private string _songDirectory;
		#endregion


		#region Properties
		public string SongDirectory
		{
	    		get => _songDirectory;
	    		set => _songDirectory = value;
		}
		#endregion


		#region Constructors
		public DirectoryManager(IConfiguration config, Song song)
		{
	    		_config = config;
	    		_song = song;
	    		Initialize();
		}
		public DirectoryManager(IConfiguration config)
		{
			_config = config;
			Initialize();
		}
		#endregion


		#region Methods
		public void CreateDirectory()
		{
	    		try
	    		{
	        		_songDirectory = AlbumDirectory();

                		if (!Directory.Exists(_songDirectory))
				{
		    			Directory.CreateDirectory(_songDirectory);
		    			Console.WriteLine("The directory has been created");
				}


				Console.WriteLine($"The song will be saved in the following" +
				  $" directory: {_songDirectory}");
	    		}
	    		catch (Exception ex)
	    		{
	        		Console.WriteLine($"An error occurred {ex.Message}");
	    		}
		}
		public void DeleteEmptyDirectories()
		{
	    		try
	    		{
	        		var albumDirectory = AlbumDirectory();
				var artistDirectory = ArtistDirectory();
				if (IsDirectoryEmpty(albumDirectory))
				{
		    			Directory.Delete(albumDirectory);
		    			Console.WriteLine($"directory {albumDirectory} deleted");
				}
				if (IsDirectoryEmpty(artistDirectory))
				{
		    			Directory.Delete(artistDirectory);
		    			Console.WriteLine($"directory {artistDirectory} deleted");
				}
	    		}
	    		catch (Exception ex)
	    		{
	        		var exMsg = ex.Message;
				Console.WriteLine($"An error occurred {exMsg}");
	    		}
		}

		public string GenerateSongPath(Song song)
		{
			_logger.Info("Generating song path");

			var songPath = string.Empty;
			var artistPath = ArtistDirectory(song);
			var albumPath = AlbumDirectory(song);

			if (!Directory.Exists(artistPath))
			{
				_logger.Info("Artist path does not exist");

				Directory.CreateDirectory(artistPath);

				_logger.Info("Creating artist path");
			}
			if (!Directory.Exists(albumPath))
			{
				_logger.Info("Album path does not exist");

				Directory.CreateDirectory(albumPath);

				_logger.Info("Created album path");
			}

			songPath = $@"{albumPath}{song.Filename}";

			return songPath;
		}

		private void Initialize()
		{
	    		_rootSongDirectory = _config.GetValue<string>("RootMusicPath");
		}

		private bool IsDirectoryEmpty(string path)
		{
    	    		return !Directory.EnumerateFileSystemEntries(path).Any();
		}

		private string AlbumDirectory()
		{
	    		string directory = _rootSongDirectory;
	    		directory += $@"{_song.Artist}/{_song.AlbumTitle}/";

            		return directory;
		}
		private string AlbumDirectory(Song song)
		{
			var directory = _rootSongDirectory;
			directory += $@"{song.Artist}/{song.AlbumTitle}/";
			Console.WriteLine($"Album directory {directory}");

			return directory;
		}
		private string ArtistDirectory()
		{
	    		var directory = _rootSongDirectory;
	    		directory += $@"{_song.Artist}/";

	    		return directory;
		}
		private string ArtistDirectory(Song song)
		{
			var directory = _rootSongDirectory;
			directory += $@"{song.Artist}/";
			Console.WriteLine($"Artist directory {directory}");

			return directory;
		}
		#endregion
    	}
}