using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using TMPro;
// ★★★追加
using UnityEngine.SceneManagement;

public class PlayerHealth : MonoBehaviour
{
    public GameObject effectPrefab;
    public AudioClip damageSound;
    public AudioClip destroySound;
    public int maxHP;
    private int HP;
    public Slider HPSlider;
    public int playerCount;
    public TextMeshProUGUI playerLabel;

    void Start()
    {
        HP = maxHP;
        HPSlider.maxValue = HP;
        HPSlider.value = HP;
        playerLabel.text = "" + playerCount;
    }

    private void OnTriggerEnter(Collider other)
    {
        if(other.CompareTag("EnemyMissile"))
        {
            HP -= 1;
            AudioSource.PlayClipAtPoint(damageSound, Camera.main.transform.position);
            Destroy(other.gameObject);

            HPSlider.value = HP;

            if(HP == 0)
            {
                GameObject effect = Instantiate(effectPrefab, transform.position, Quaternion.identity);
                Destroy(effect, 1.0f);
                AudioSource.PlayClipAtPoint(destroySound, Camera.main.transform.position);

                this.gameObject.SetActive(false);

                playerCount -= 1;
                playerLabel.text = "" + playerCount;

                // ★★★追加
                // 残機数によって場合分けを行います。
                if(playerCount > 0)
                {
                    Invoke("Retry", 1.0f);
                }
                else
                {
                    SceneManager.LoadScene("GameOver");
                }
            }
        }
    }

    void Retry()
    {
        this.gameObject.SetActive(true);

        HP = maxHP;
        HPSlider.maxValue = HP;
        HPSlider.value = HP;
    }
}