Tag: Scriptable Objects

[Header("Game States")]
public MainMenuState StateMainMenu;
public GameStartState StateGameStart;
public PlayerPreparationState StatePlayerPreparation;
public EnemyAttackState StateEnemyAttack;
public GameOverState StateGameOver;

[Header("Cursor States")] 
public CursorDefault CursorStateDefault;
public CursorBuilding CursorStateBuilding;
public CursorSelling CursorStateSelling;
public CursorMoving CursorStateMoving;
public CursorUpgrading CursorStateUpgrading;

public abstract void TileClicked(Tile tile);
public abstract void TileEntered(Tile tile);
public abstract void TileExited(Tile tile);
public abstract void BuildableClicked(Buildable buildable);
public abstract void BuildableEntered(Buildable buildable);
public abstract void BuildableExited(Buildable buildable);

protected void Enter()
{
	if(gameData.CurrentCursor) gameData.CurrentCursor.Exit();
	
	gameData.CurrentCursor =  this;

	if (debug) Debug.Log(this + "::Enter() (" + gameData.CurrentCursor + ")");
	OnEnter();
	Entered?.Invoke();
}

protected virtual void OnEnter(){ }

private void Exit()
{
	if (debug) Debug.Log(this + "::Exit() (" + gameData.CurrentCursor + ")");
	OnExit();
	Exited?.Invoke();
}

protected virtual void OnExit(){ }

protected virtual void Cancel()
{
	gameData.CursorStateDefault.Enter();
}

public void SetNewBuildable(BuildableSetup newTower)
{
	currentBuildable = newTower;
	ShowInfoPanel(newTower);
	
	if (gameData.CurrentCursor != this) Enter();
}

protected override void OnEnter()
{
	base.OnEnter();
	
	InputManager.EscapePressed += Cancel;
	InputManager.RightClickPressed += Cancel;
}

protected override void OnExit()
{
	base.OnExit();
	
	HideGhostTower();
	HideBonusText();
	HideRangefinder();
	HideInfoPanel();
	currentBuildable = null;
	
	InputManager.EscapePressed -= Cancel;
	InputManager.RightClickPressed -= Cancel;
}

public override void TileClicked(Tile tile)
{
	if (currentBuildable.Cost > currentBuildable.Currency.Value) return;
	
	var buildCommand = new BuildCommand(currentBuildable, tile);
	gameData.CommandManage.AddCommand(buildCommand);

	HideGhostTower();
	HideBonusText();
	HideRangefinder();
	
	if(!InputManager.ShiftHeld) Cancel();
}

public override void TileEntered(Tile tile)
{
	
	ShowGhostTower(currentBuildable, tile);
	ShowBonusText(tile);
	ShowRangefinder(tile, currentBuildable.AttackRange.value * (1 + (tile.Bonus / 100f)));
}

public override void TileExited(Tile tile)
{
	HideGhostTower();
	HideBonusText();
	HideRangefinder();
}

public override void BuildableClicked(Buildable buildable) { }
public override void BuildableEntered(Buildable buildable) { }
public override void BuildableExited(Buildable buildable) { }

public class CommandManager : ScriptableObject
{
    public event Action QueueChanged; 
    public int Count => commandsBuffer.Count;
    private Stack<ICommand> commandsBuffer = new();

    public void AddCommand(ICommand command)
    {
        command.Execute();
        commandsBuffer.Push(command);
        QueueChanged?.Invoke();
    }
    
    // undoes the last command
    public void UndoCommand()
    {
        if(commandsBuffer.Count == 0) return;
        commandsBuffer.Pop().Undo();
        QueueChanged?.Invoke();
    }

    // undoes all the commands in reverse order
    public void UndoAllCommands()
    {
        if(commandsBuffer.Count == 0) return;
        while (commandsBuffer.Count > 0)
        {
            commandsBuffer.Pop().Undo();
        }
        QueueChanged?.Invoke();
    }

    // executes each tower's cleanup command and clears the stack to finalize the commands
    // (only used to cleanup after sell commands right now)
    public void FinalizeCommands()
    {
        while (commandsBuffer.Count > 0)
        {
            commandsBuffer.Pop().Commit();
        }
        ClearCommands();
    }

    public void ClearCommands()
    {
        commandsBuffer.Clear();
        QueueChanged?.Invoke();
    }

}

public interface ICommand
{
    void Execute();
    void Undo();
    void Commit();
}

public class MoveCommand : ICommand
{
    private readonly Buildable commandObject;
    private readonly Tile originalTile;
    private readonly Tile newTile;
    
    public MoveCommand(Buildable buildable, Tile original, Tile target)
    {
        commandObject = buildable;
        originalTile = original;
        newTile = target;
    }

    // move the Buildable, cleanup the Tile statuses
    public void Execute()
    {
        originalTile.MarkBuilt(false);
        commandObject.transform.position = newTile.GetTopOfTile();
        commandObject.HomeTile = newTile;
        commandObject.TileBonus.initial.value = newTile.Bonus;
        newTile.MarkBuilt(true);
    }

    // move the Buildable back, revert the Tile statuses
    public void Undo()
    {
        originalTile.MarkBuilt(true);
        commandObject.transform.position = originalTile.GetTopOfTile();
        commandObject.HomeTile = originalTile;
        commandObject.TileBonus.initial.value = originalTile.Bonus;
        newTile.MarkBuilt(false);
    }

    // no cleanup necessary
    public void Commit() {}
}