using Godot;

namespace Cirno.Scripts.Utils;

public partial class GameStateManager : Node
{
    public static GameStateManager Instance { get; private set; }
    public GameState GameState { get; private set; }
    
    [Signal] public delegate void GameStateChangeEventHandler(GameState state);

    public void Init(GameState initialState)
    {
        Instance = this;
        GameState = initialState;
    }
    
    public void Pause()
    {
        if (GameState == GameState.Playing)
        {
            ChangeState(GameState.Paused);
        }
    }

    public void Unpause()
    {
        if (GameState == GameState.Paused)
        {
            CallDeferred(MethodName.ChangeState, (int)GameState.Playing);
            //ChangeState(GameState.Playing);
        }
    }

    public static void SetState(GameState state)
    {
        GameStateManager.Instance.ChangeState(state);
    }
    
    public void ChangeState(GameState state)
    {
        if (state == GameState) return;
        GameState = state;
        EmitSignal(SignalName.GameStateChange, (int)state);
        GD.Print($"Game state changed to {state}");

        switch (state)
        {
            case GameState.Paused:
            case GameState.Dialogue:
            case GameState.Shop:
            case GameState.Inventory:
                GlobalState.Instance.ChangeCursor(true);

                GetTree().SetPause(true);
                //Input.MouseMode = Input.MouseModeEnum.Visible;
                break;
            case GameState.Playing:
            case GameState.Controlling:
                //Input.MouseMode = Input.MouseModeEnum.Confined;
                GlobalState.Instance.ChangeCursor(false);
                DelayedUnpause();
                //CallDeferred(MethodName.DelayedUnpause);
                //GetTree().SetPause(false);
                break;
            case GameState.Menu:
                GlobalState.Instance.ChangeCursor(true);
                //Input.MouseMode = Input.MouseModeEnum.Visible;
                DelayedUnpause();
                //CallDeferred(MethodName.DelayedUnpause);
                //GetTree().SetPause(false);
                break;
        }
    }
    
    private void DelayedUnpause()
    {
        GetTree().SetPause(false);
    }
    
    public override void _Process(double delta)
    {
        if (GameState is GameState.Paused && GlobalInputManager.IsPauseJustPressed())
        {
            Unpause();
            return;
        }
    }
    
}