using System;
using System.IO;

namespace Otter {
    /// <summary>
    /// Class that represents a player session.  Use this for maintaining and using information about
    /// a player.  For example a two player game might have two sessions, one for each player, each with
    /// their own controls configured and save data.
    /// </summary>
    
    public class Session {

        static private int nextSessionId = 0;

        /// <summary>
        /// Create a new Session using the current Game.Instance.
        /// </summary>
        /// <returns></returns>
        static public Session Create(string name) {
            return new Session(Game.Instance, name);
        }

        static public Session Create(Enum name) {
            return Session.Create(Util.EnumValueToString(name));
        }

        /// <summary>
        /// The name of this Session. This is important as it will determine the name of save data
        /// files and you can also find a session by name.
        /// </summary>
        public string Name = "";

        /// <summary>
        /// The Controller to use for this Session.
        /// </summary>
        public Controller Controller = new Controller();

        /// <summary>
        /// Gets the Controller as a specific type of Controller.
        /// </summary>
        /// <typeparam name="T">The type of Controller.</typeparam>
        /// <returns>The Controller as type T.</returns>
        public T GetController<T>() where T : Controller {
            return Controller as T;
        }

        /// <summary>
        /// The Id of this session in the Game.
        /// </summary>
        public int Id { get; internal set; }

        public DataSaver Data { get; private set; }

        /// <summary>
        /// The game that manages this session.
        /// </summary>
        public Game Game { get; internal set; }

        /// <summary>
        /// Create a new Session.
        /// </summary>
        /// <param name="game">The Game that the session is tied to.</param>
        public Session(Game game, string name) {
            Game = game;
            Name = name;

            var folder = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "/" + Game.GameFolder;
            var path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "/" + Game.GameFolder + "/" + Name + ".";
            if (!Directory.Exists(folder)) {
                Directory.CreateDirectory(folder);
            }
            Data = new DataSaver(path);

            Id = nextSessionId;
            nextSessionId++;
        }

        internal void Update() {
            if (Controller != null) {
                Controller.UpdateFirst();
            }
        }

    }
}