source: 2010/23/hniemi/BlockPusher/Blockpusher/Blockpusher/Blockpusher.cs @ 2641

using System;
using System.Collections.Generic;
using Jypeli;
using Jypeli.Assets;
using Jypeli.Controls;
using Jypeli.Effects;
using Jypeli.Widgets;
using System.IO;

/// <summary>
/// Blockpusher-game
/// 
/// TODO: clones needed from levels
/// </summary>
public class Blockpusher : Game
{
    public static readonly int BlockSize = 20;

    private readonly Color playerColor = Color.Blue;
    private readonly Color satisfyColor = Color.Green;
    private readonly Color unsatisfyColor = Color.Red;

    private int currentLevelIndex = 0;
    private BlockLevel currentLevel;
    private List<BlockLevel> levels = new List<BlockLevel>();

    private bool gameSaved = false;
    private IList<string> savedLevel;

    private List<String> testLevel = new List<string>(new String[]
                                 {"xxxxxxxxx",
                                  "x  x  xmx",
                                  "xb p  xbx",
                                  "xm x    x",
                                  "x  xxxxxx",
                                  "x      xx",
                                  "xxxxxxxxx"});

    /// <summary>
    /// Starts the game
    /// </summary>
    public override void Begin()
    {
        gameSaved = SaveExist();
        Menu();
        LoadLevels();
    }

    /// <summary>
    /// Checks if save exists
    /// </summary>
    /// <returns>true, if savefile exists</returns>
    public bool SaveExist() 
    {
        return DataStorage.Exists("CurrentSave.txt");
    }

    /// <summary>
    /// Starts new game
    /// </summary>
    public void NewGame(int levelIndex) 
    {
        ClearAll();
        currentLevelIndex = levelIndex;
        currentLevel = levels[levelIndex].Clone();
        currentLevel.Victory += VictorySplash;
        currentLevel.AddToGame();
        SetControls();
    }

    /// <summary>
    /// Loads levels from directory
    /// </summary>
    /// <param name="directory">Not in use</param>
    public void LoadLevels(string directory=@"Data\Levels")
    {
        //TODO: Tee lukeminen valmiiksi

        IEnumerable<string> folders = Directory.EnumerateDirectories(directory,"*");

        foreach (string s in folders)
        {
            //Exludes hidden folder (with . before name)
            if (s.Length != 0 && s[s.LastIndexOf('\\')+1] != '.')
            {
                //MessageDisplay.Add(s);
                LoadLevels(s);
            }
        }

        IEnumerable<string> files = Directory.EnumerateFiles(directory, "*");
        foreach (string file in files)
        {
            BlockLevel level = new BlockLevel(this);
            level.CreateField(ReadFile(file));

            //level.Name = file.Substring(file.LastIndexOf('\\')+1, file.LastIndexOf('.') - file.LastIndexOf('\\')-1);
            levels.Add(level);
        }
    }

    #region Menu
    /// <summary>
    /// Creates startmenu for game
    /// </summary>
    public void Menu()
    {
        int labelHeighth = 50;

        ClearAll();
        IsMouseVisible = true;
        PhoneBackButton.Listen(ConfirmExit, "Lopeta peli");
        Keyboard.Listen(Key.Escape, ButtonState.Pressed, ConfirmExit, "Lopeta peli");

        List<Tuple<string, Action>> labels = new List<Tuple<string, Action>>();
        if (gameSaved) labels.Add(new Tuple<string, Action>("Continue", ContinueGame));
        labels.Add(new Tuple<string, Action>("New game", delegate { LevelSelectionMenu(); }));
        labels.Add(new Tuple<string, Action>("Quit?", ConfirmExit));

        for (int i = 0; i < labels.Count; i++)
        {
            PushButton button = new PushButton(200, labelHeighth);
            button.Text = labels[i].Item1;
            button.Y = -(i * labelHeighth);
            button.Clicked += labels[i].Item2;
            Add(button);
        }
    }

    /// <summary>
    /// Asks if you want to go to main menu or continue playing
    /// </summary>
    public void ConfirmMenu()
    {
        ClearControls();
        MultiSelectWindow w = new MultiSelectWindow("Back to menu?", new String[] { "Yes", "No!" });
        w.AddItemHandler(0, delegate { MakeContinuable(); Menu(); });
        w.AddItemHandler(1, delegate { SetControls(); w.Close(); });
        Add(w);
    }

    /// <summary>
    /// Shows "Victory"-label
    /// </summary>
    public void VictorySplash() 
    {
        Label victory = new Label("Victory!");
        victory.Color = Color.DarkCyan;
        victory.TextColor = Color.Fuchsia;

        Add(victory);

        Timer.SingleShot(1, Victory);
    }

    /// <summary>
    /// Eventhandler for victory
    /// </summary>
    public void Victory()
    {
        IsMouseVisible = true;
        MultiSelectWindow w = new MultiSelectWindow("Conratulations, you cleared level with "+ currentLevel.Moves +" moves! Do you want to:", new String[] { "Retry", "Next Level", "Main menu" });
        w.AddItemHandler(0, delegate { NewGame(currentLevelIndex); });
        w.AddItemHandler(1, delegate { NewGame((currentLevelIndex+1) % levels.Count); });
        w.AddItemHandler(2, Menu);
        
        Add(w);
    }

    /// <summary>
    /// Shows levelselection menu
    /// </summary>
    public void LevelSelectionMenu(int current = 0)
    {
        ClearAll();
        int buttonheight = 50;

        Label topic = new Label("Levels");

        Widget buttons = new Widget(new HorizontalLayout());
        Widget bottomButtons = new Widget(new HorizontalLayout());

        PushButton previous = new PushButton(150, buttonheight, "Previous");
        buttons.Add(previous);

        PushButton next = new PushButton(150, buttonheight, "Next");
        buttons.Add(next);

        Label name = new Label(levels[current].Name);

        PushButton back = new PushButton(150, buttonheight, "Back");
        bottomButtons.Add(back);

        PushButton play = new PushButton(150, buttonheight, "Select");
        bottomButtons.Add(play);

        topic.Top = Screen.Top;
        buttons.Top = topic.Bottom;
        name.Y = buttons.Bottom - (name.Height / 2);

        bottomButtons.Bottom = Screen.Bottom;
        
        Add(topic);
        Add(buttons);
        Add(name);
        Add(bottomButtons);

        levels[current].AddToGame();

        previous.Clicked += delegate { LevelSelectionMenu((current-1 + levels.Count) % levels.Count); };
        next.Clicked += delegate { LevelSelectionMenu((current + 1) % levels.Count); };
        play.Clicked += delegate { NewGame(current); };
        back.Clicked += Menu;

    }
    #endregion

    /// <summary>
    /// Continues game from current save
    /// </summary>
    public void ContinueGame() 
    {
        ClearAll();
        currentLevel = new BlockLevel(this);
        currentLevel.Victory += VictorySplash;

        List<string> lines = ReadFile("Data/CurrentSave.txt");
        File.Delete("Data/CurrentSave.txt");
        gameSaved = false;
        //DataStorage.Delete("CurrentSave.txt");

        currentLevel.Moves = int.Parse(lines[lines.Count - 1]);
        lines.RemoveAt(lines.Count - 1);
        currentLevelIndex = int.Parse(lines[lines.Count - 1]);
        lines.RemoveAt(lines.Count - 1);

        currentLevel.CreateField(lines);
        currentLevel.AddToGame();
        SetControls();
    }

    /// <summary>
    /// Saves game
    /// </summary>
    public void MakeContinuable()
    {
        gameSaved = true;
        savedLevel = currentLevel.CurrentState();
        savedLevel.Add(currentLevelIndex + "");
        savedLevel.Add(currentLevel.Moves + "");

        File.WriteAllLines("Data/CurrentSave.txt", savedLevel);
    }

    /// <summary>
    /// Reads lines from file
    /// </summary>
    /// <param name="file">Sourcefile</param>
    public List<String> ReadFile(string file) 
    {
        List<String> lines = new List<string>();
        try
        {
            using (StreamReader sr = new StreamReader(file))
            {
                String line;
                while ((line = sr.ReadLine()) != null)
                {
                    lines.Add(line);
                }
            }
        }
        catch (Exception e)
        {
            return null;
        }
        return lines;
    }

    /// <summary>
    /// Moves player in current level
    /// </summary>
    /// <param name="xMov">X-movement</param>
    /// <param name="yMov">Y-movement</param>
    public void MovePlayer(int xMov, int yMov)
    {
        currentLevel.MovePlayer(xMov, yMov);
    }

    /// <summary>
    /// Sets controllisteners for keyboard
    /// </summary>
    public void SetControls() 
    {
        Keyboard.Listen(Key.Up, ButtonState.Pressed, MovePlayer, null, 0, -1);
        Keyboard.Listen(Key.Down, ButtonState.Pressed, MovePlayer, null, 0, 1);
        Keyboard.Listen(Key.Left, ButtonState.Pressed, MovePlayer, null, -1, 0);
        Keyboard.Listen(Key.Right, ButtonState.Pressed, MovePlayer, null, 1, 0);

        Keyboard.Listen(Key.Escape, ButtonState.Pressed, ConfirmMenu, "Lopeta peli");
    }
}