using UnityEngine;
using Photon.Pun;
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;
    // ★改良
    private int attacks = 5;

    public AudioClip changeSound;
    public Sprite[] attackImages;
    private Image attackIcon;

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

        targetMark = GameObject.Find("TargetMark");
        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);
            attackIcon.sprite = attackImages[num];
        }

        if (InputManager.isa.Player.Throw.triggered)
        {
            // ★改良
            if (num == 0) ThrowBomb();
            else if (num == 1) Targetshoot();
            else if (num == 2) SetDrone();
            else if (num == 3) SetAmateras();
            else if (num == 4) BeamShot(); // ★追加
        }
    }

    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);
    }

    // ★追加
    void BeamShot()
    {
        // 画面中央からレイを飛ばして着弾点を決める
        Vector3 screenCenter = new Vector3(Screen.width / 2, Screen.height / 2, 0);
        Ray ray = Camera.main.ScreenPointToRay(screenCenter);
        RaycastHit hit;

        // デフォルトの着弾点は「正面100m先」にしておく（何にも当たらなかった時用）
        Vector3 targetPoint = ray.origin + (ray.direction * 100f);

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

        // ビーム弾の生成
        GameObject beam = PhotonNetwork.Instantiate("Beam", shotPoint.transform.position, Quaternion.identity);

        // 弾をターゲットの方向に向かせる
        beam.transform.LookAt(targetPoint);

        // 物理挙動で直進させる
        Rigidbody beamRb = beam.GetComponent<Rigidbody>();

        if (beamRb != null)
        {
            float beamSpeed = 50f;

            // 重力オフ
            beamRb.useGravity = false;

            // ターゲットへの進行方向を計算
            Vector3 direction = (targetPoint - shotPoint.transform.position).normalized;

            // ビーム発射
            beamRb.AddForce(direction * beamSpeed, ForceMode.VelocityChange);
        }
    }
}