using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

public class TankHealth : MonoBehaviour
{
    [SerializeField]
    private GameObject effectPrefab1;

    [SerializeField]
    private GameObject effectPrefab2;

    public int tankHP;

    [SerializeField]
    private Text HPLabel;

    public int tankMaxHP = 5;


////* ここから追加 *////

    private int enemyCount;　　　// シーン内の敵の数を代入するための変数

////* ここまで *////


    private void Start()
    {
        tankHP = tankMaxHP;

        HPLabel.text = "HP:" + tankHP;

////* ここから追加 *////　　※　コメントを書いてみましょう！

        GameObject[] enemys = GameObject.FindGameObjectsWithTag("Enemy");

        enemyCount = enemys.Length;

        Debug.Log("敵の残数を取得。敵の数 : " + enemyCount + " 体");    // <= private 修飾子の変数はインスペクターから確認できませんので、処理の流れを確認するためにも Debug.Logを活用します。

////* ここまで *////

    }


    private void OnTriggerEnter(Collider other)//他のオブジェクトが接触した瞬間
    {
        if (other.gameObject.tag == "EnemyShell")
        {
            tankHP -= 1;

            HPLabel.text = "HP:" + tankHP;

            Destroy(other.gameObject);

            if (tankHP > 0)
            {
                GameObject effect1 = Instantiate(effectPrefab1, transform.position, Quaternion.identity);
                Destroy(effect1, 1.0f);
            }
            else
            {
                GameObject effect2 = Instantiate(effectPrefab2, transform.position, Quaternion.identity);
                Destroy(effect2, 1.0f);

                //Destroy(gameObject);

                this.gameObject.SetActive(false);

                Invoke("GoToGameOver", 1.5f);

            }
        }
    }

    void GoToGameOver()
    {
        SceneManager.LoadScene("GameOver");
    }

    public void AddHP(int amount)
    {
        tankHP += amount;

        if (tankHP > tankMaxHP)
        {
            tankHP = tankMaxHP;
        }

        HPLabel.text = "HP:" + tankHP;
    }


////* ここからメソッドを１つ追加 *////


    /// <summary>
    /// 敵の数を減算する
    /// </summary>
    public void CalculateEnemyCount() {
        enemyCount--;

        if (enemyCount <= 0) {
            // 
            Debug.Log("Game Clear");

            SceneManager.LoadScene("GameClear");
        } else {
            Debug.Log("残り あと " + enemyCount + " 体");
        }
    }

////* ここまで *////

}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class DestroyObject : MonoBehaviour
{
    [SerializeField]
    private GameObject effectPrefab;

    [SerializeField]
    private GameObject effectPrefab2;
    public int objectHP;

    [SerializeField]
    private GameObject[] itemPrefabs;

    [SerializeField]
    private int scoreValue;

    private ScoreManager sm;


    private void Start()
    {
        sm = GameObject.Find("ScoreLabel").GetComponent<ScoreManager>();
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.CompareTag("Shell"))
        {
            objectHP -= 1;

            if (objectHP > 0)
            {
                Destroy(other.gameObject);

                GameObject effect = Instantiate(effectPrefab, other.transform.position, Quaternion.identity);

                Destroy(effect, 2.0f);
            }
            else
            {
                Destroy(other.gameObject);

                GameObject effect2 = Instantiate(effectPrefab2, other.transform.position, Quaternion.identity);
                Destroy(effect2, 2.0f);

                Destroy(this.gameObject);

                int itemNumber = Random.Range(0, itemPrefabs.Length);

                Vector3 pos = transform.position;

                if (itemPrefabs.Length != 0)
                {
                    Instantiate(itemPrefabs[itemNumber], new Vector3(pos.x, pos.y + 0.1f, pos.z), Quaternion.identity);
                }

                sm.AddScore(scoreValue);


////* ここから追加 *////

                // コメントを書いてみましょう！
                if (this.gameObject.tag == "Enemy") { <= なぜこの処理が必要なのか、考えてみましょう！
                    GameObject.Find("Tank").GetComponent<TankHealth>().CalculateEnemyCount();   <= どんな命令を処理しているか、考えてみましょう！
                }

////* ここまで *////

            }
        }
    }
}