using UnityEngine;
using Photon.Pun;
// ★追加
using UnityEngine.UI;

public class AttackController : MonoBehaviourPunCallbacks
{
    public GameObject shotPoint;
    private float throwForce;
    private float throwAngle;
    private GameObject targetMark;
    private Vector3 currentTargetPos;
    private float launchAngle = 75f;
    private int num = 0;
    private int attacks = 4;
    public AudioClip changeSound;
    // ★追加
    public Sprite[] attackImages;
    private Image attackIcon;

    void Start()
    {
        if (!photonView.IsMine)
        {
            return;
        }

        targetMark = GameObject.Find("TargetMark");

        // ★追加
        attackIcon = GameObject.Find("AttackIcon").GetComponent<Image>();
        attackIcon.sprite = attackImages[num];
    }

    void Update()
    {
        if (!photonView.IsMine)
        {
            return;
        }

        if (InputManager.isa.Player.AttackChange.triggered)
        {
            num = (num + 1) % attacks;
            AudioSource.PlayClipAtPoint(changeSound, Camera.main.transform.position);

            // ★追加
            attackIcon.sprite = attackImages[num];
        }

        if (InputManager.isa.Player.Throw.triggered)
        {
            if (num == 0)
            {
                ThrowBomb();
            }
            else if (num == 1)
            {
                Targetshoot();
            }
            else if (num == 2)
            {
                SetDrone();
            }
            else
            {
                SetAmateras();
            }
        }
    }

    void ThrowBomb()
    {
        throwForce = 10f;
        throwAngle = 45f;

        GameObject bomb = PhotonNetwork.Instantiate("Bomb", shotPoint.transform.position, Quaternion.identity);
        Rigidbody bombRb = bomb.GetComponent<Rigidbody>();
        Vector3 forceDirection = Quaternion.AngleAxis(-throwAngle, transform.right) * transform.forward;
        bombRb.AddForce(forceDirection * throwForce, ForceMode.VelocityChange);
    }

    void Targetshoot()
    {
        Vector3 screenCenter = new Vector3(Screen.width / 2, Screen.height / 2, 0);

        Ray ray = Camera.main.ScreenPointToRay(screenCenter);
        RaycastHit hit;

        if (Physics.Raycast(ray, out hit))
        {
            currentTargetPos = hit.point;
            targetMark.transform.position = hit.point;

            Shoot();
        }
    }

    void Shoot()
    {
        GameObject bomb = PhotonNetwork.Instantiate("Bomb", shotPoint.transform.position, Quaternion.identity);
        Rigidbody bombRb = bomb.GetComponent<Rigidbody>();

        Vector3 diff = currentTargetPos - shotPoint.transform.position;
        float h = diff.y;
        diff.y = 0;
        float distance = diff.magnitude;
        float g = Physics.gravity.magnitude;
        float angle = launchAngle * Mathf.Deg2Rad;
        float cosA = Mathf.Cos(angle);
        float tanA = Mathf.Tan(angle);

        float denominator = 2 * cosA * cosA * (distance * tanA - h);
        if (denominator <= 0)
        {
            return;
        }

        float velocity = Mathf.Sqrt((g * distance * distance) / denominator);
        Vector3 velocityVec = diff.normalized * velocity * cosA;
        velocityVec.y = velocity * Mathf.Sin(angle);
        bombRb.linearVelocity = velocityVec;
    }

    void SetDrone()
    {
        PhotonNetwork.Instantiate("Drone", shotPoint.transform.position, Quaternion.identity);
    }

    void SetAmateras()
    {
        PhotonNetwork.Instantiate("Amateras", shotPoint.transform.position, Quaternion.identity);
    }
}