using Godot;
namespace Babushka.scripts.CSharp.Common.Fight;

public partial class FightStateManager : Node
{
    [Signal]
    public delegate void ExitingTransitionEventHandler(FightState exitingState);

    [Signal]
    public delegate void EnteringTransitionEventHandler(FightState enteringState);

    public enum FightState
    {
        None,
        FightStartAnim,
        Input,
        InputTargetSelect,
        FriendAttackAnim,
        Enemy,
        EnemyAttackAnim,
        PlayerWinAnim,
        EnemyWinAnim,
        ChangeSideToEnemy,
        ChangeSideToFriendly,
        Heal,
    }

    private FightState _fightStateBacking = FightState.None;

    public FightState CurrentFightState
    {
        set => Transition(_fightStateBacking, value);
        get => _fightStateBacking;
    }

    private void Transition(FightState from, FightState to)
    {
        if(from == to)
            return;
        
        GD.Print($"Transitioning from {from} to {to}");
        ExitTransition(from);
        _fightStateBacking = to;
        EnterTransition(to);
    }

    private void ExitTransition(FightState from)
    {
        EmitSignalExitingTransition(from);
    }

    private void EnterTransition(FightState to)
    {
        EmitSignalEnteringTransition(to);
        switch (to)
        {
            case FightState.FightStartAnim:
                EnterFightStartAnim();
                break;
        }
    }
    private void EnterFightStartAnim()
    {
        GetTree().CreateTimer(1).Timeout += () => CurrentFightState = FightState.Input;
    }

    public void ToStartAnim()
    {
        CurrentFightState = FightState.FightStartAnim;
    }

    public bool IsRunning()
    {
        return CurrentFightState != FightState.None;
    }
}