using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

public class MonsterHP : MonoBehaviour
{
    private int monsterMaxHP = 15;
    private int monsterHP;
    public GameObject effectPrefab;
    public AudioClip sound;
    public Slider HPSlider;
    public Text HPlabel;

    // 追加
    public GameObject body;
    private Color initialColor;
    private bool isGuard = false;
    public GameObject guardEffectPrefab;
    public AudioClip guardSound;
    public GameObject doubleDamageEffect;
    public AudioClip doubleDamageSound;

    void Start()
    {
        monsterHP = monsterMaxHP;
        HPSlider.maxValue = monsterMaxHP;
        HPSlider.value = monsterHP;
        HPlabel.text = "" + monsterHP;

        // 追加
        initialColor = body.GetComponent<MeshRenderer>().material.color;
    }

    // 追加
    private void Update()
    {
        if (Input.GetKey(KeyCode.X))
        {
            // 体の色を赤色にする。
            body.GetComponent<MeshRenderer>().material.color = Color.red;

            isGuard = true;
        }
        else
        {
            // 元の色に戻す
            body.GetComponent<MeshRenderer>().material.color = initialColor;

            isGuard = false;
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.CompareTag("Stick"))
        {
            // 追加
            // ノーガード中・・・＞通常のダメージ
            if (!isGuard)
            {
                monsterHP -= 5;

                if (monsterHP == 0)
                {
                    SceneManager.LoadScene("GameOver");
                }
                HPSlider.value = monsterHP;
                HPlabel.text = "" + monsterHP;
                GameObject effect = Instantiate(effectPrefab, transform.position, Quaternion.identity);
                AudioSource.PlayClipAtPoint(sound, Camera.main.transform.position);
            }
            // 追加
            // ガード中・・・＞ノーダメージ
            else
            {
                GameObject guardEffect = Instantiate(guardEffectPrefab, transform.position, Quaternion.identity);
                Destroy(guardEffect, 1.0f);
                AudioSource.PlayClipAtPoint(guardSound, Camera.main.transform.position);
            }
        }
    }

    // 改良
    private void OnCollisionEnter(Collision collision)
    {
        if (collision.gameObject.CompareTag("Yari"))
        {
            // 追加
            // ノーガード中・・・＞通常のダメージ
            if (!isGuard)
            {
                monsterHP -= 3;
                GameObject effect = Instantiate(effectPrefab, transform.position, Quaternion.identity);
                AudioSource.PlayClipAtPoint(sound, Camera.main.transform.position);
            }
            // 追加
            // ガード中・・・＞ダメージ２倍！
            else
            {
                monsterHP -= 6;
                GameObject doubleEffect = Instantiate(doubleDamageEffect, transform.position, Quaternion.identity);
                AudioSource.PlayClipAtPoint(doubleDamageSound, Camera.main.transform.position);
            }

            HPSlider.value = monsterHP;
            HPlabel.text = "" + monsterHP;

            if (monsterHP < 0)
            {
                SceneManager.LoadScene("GameOver");
            }
        }
    }
}