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

public class PlayerBehavior : MonoBehaviour
 {
     public float moveSpeed = 10f;
     public float rotateSpeed = 75f;
     public float jumpVelocity = 5f;
     public float distanceToGround = 0.1f;

     public LayerMask groundLayer;

     public GameObject bullet;
     public float bulletSpeed = 100f;

     private CapsuleCollider _col;

     private float vInput;
     private float hInput;

     private Rigidbody _rb;

     private GameBehavior _gameManager;

     public delegate void JumpingEvent();

     public event JumpingEvent playerJump;

     void Start()
     {
          _rb = GetComponent<Rigidbody>();
          _col = GetComponent<CapsuleCollider>();

          _gameManager = GameObject.Find("Game Manager").GetComponent<GameBehavior>();
     }

     void Update()
     {
          vInput = Input.GetAxis("Vertical") * moveSpeed;
          hInput = Input.GetAxis("Horizontal") * rotateSpeed;

          /* 4
          this.transform.Translate(Vector3.forward * vInput *
          Time.deltaTime);
          this.transform.Rotate(Vector3.up * hInput * Time.deltaTime);
          */
     }

     void FixedUpdate()
     {
          Vector3 rotation = Vector3.up * hInput;
          Quaternion angleRot = Quaternion.Euler(rotation * Time.fixedDeltaTime);

          _rb.MovePosition(this.transform.position + this.transform.forward * vInput * Time.fixedDeltaTime);
          _rb.MoveRotation(_rb.rotation * angleRot);

          if(IsGrounded() && Input.GetKeyDown(KeyCode.Space))
          {
               _rb.AddForce(Vector3.up * jumpVelocity, ForceMode.Impulse);
               playerJump();
          }

          if (Input.GetMouseButtonDown(0))
         {
             GameObject newBullet = Instantiate(bullet, this.transform.position + new Vector3(1, 0, 0), this.transform.rotation) as GameObject;
             Rigidbody bulletRB = newBullet.GetComponent<Rigidbody>();

             bulletRB.velocity = this.transform.forward * bulletSpeed;
         }
     }

     private bool IsGrounded()
     {
         Vector3 capsuleBottom = new Vector3(_col.bounds.center.x, _col.bounds.min.y, _col.bounds.center.z);
         bool grounded = Physics.CheckCapsule(_col.bounds.center, capsuleBottom, distanceToGround, groundLayer, QueryTriggerInteraction.Ignore);

         return grounded;
     }

     void OnCollisionEnter(Collision collision)
     {
         if(collision.gameObject.name == "Enemy")
         {
             _gameManager.HP -= 1;
         }
     }
}