using TMPro;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

// GameManagerの状態と撃破数をCanvasへ表示する
public class GameUI : MonoBehaviour
{
    [SerializeField] private GameManager gameManager;
    [SerializeField] private TMP_Text defeatCountText;
    [SerializeField] private GameObject resultPanel;
    [SerializeField] private TMP_Text resultText;
    [SerializeField] private Button retryButton;

    private void OnEnable()
    {
        gameManager.DefeatCountChanged += OnDefeatCountChanged;
        gameManager.StateChanged += OnStateChanged;
    }

    private void OnDisable()
    {
        gameManager.DefeatCountChanged -= OnDefeatCountChanged;
        gameManager.StateChanged -= OnStateChanged;
    }

    private void Start()
    {
        Refresh();
    }

    private void Refresh()
    {
        OnDefeatCountChanged(
            gameManager.DefeatCount,
            gameManager.ClearDefeatCount);
        resultPanel.SetActive(false);
        OnStateChanged(gameManager.State);
    }

    private void OnDefeatCountChanged(int count, int goal)
    {
        defeatCountText.text = $"Defeat {count} / {goal}";
    }

    private void OnStateChanged(GameState state)
    {
        if (state != GameState.GameClear &&
            state != GameState.GameOver)
            return;

        resultPanel.SetActive(true);
        resultText.text = state == GameState.GameClear
            ? "GAME CLEAR"
            : "GAME OVER";

        EventSystem.current.SetSelectedGameObject(retryButton.gameObject);
    }
}