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

public class PlayerController : MonoBehaviour{

    [HideInInspector]
    public Vector2 lastCheckpoint;

    public SpriteRenderer[] deathDisable;

    public float speed;
    public float airSpeed;
    [HideInInspector]
    public bool grappled;
    [HideInInspector]
    public bool ableToGrapple;

    [Header("Jump")]
    public float jumpForce;
    public float groundDetectionRadius;
    public LayerMask whatIsGround;
    [Space(10)]
    public GameObject death;
    public Transform gun;
    public Transform firePos;
    LineRenderer line;

    bool dead;
    bool moving;
    bool jump;
    bool isGrounded;
    Rigidbody2D rb2d;
    Shoot shoot;

    // Start is called before the first frame update
    void Start(){
        AudioManager.instance.Play("Theme");
        shoot = GetComponent<Shoot>();
        rb2d = GetComponent<Rigidbody2D>();
        line = GetComponent<LineRenderer>();
        lastCheckpoint = transform.position;
    }

    // Update is called once per frame
    void Update(){
        if (!dead){
            Vector2 mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;
            float rotZ = Mathf.Atan2(mousePos.y, mousePos.x) * Mathf.Rad2Deg;
            gun.transform.rotation = Quaternion.Euler(0f, 0f, rotZ);

            isGrounded = Physics2D.OverlapCircle(transform.position, groundDetectionRadius, whatIsGround);

            if (Input.GetKeyDown(KeyCode.Space) && isGrounded)
                jump = true;
        }
    }

    void LateUpdate(){
        line.SetPosition(0, firePos.position);
    }

    private void OnDrawGizmosSelected(){
        Gizmos.DrawWireSphere(transform.position, groundDetectionRadius);
    }

    void FixedUpdate(){
        if (!dead){
            if (!moving && isGrounded){
                float fixedVelocity = rb2d.angularVelocity;
                fixedVelocity *= .98f;
                rb2d.angularVelocity = fixedVelocity;
            }

            float h = Input.GetAxisRaw("Horizontal");
            if (h != 0){
                moving = true;
            }else{
                moving = false;
            }

            if (isGrounded && !grappled){
                rb2d.AddForce(Vector2.right * speed * h);
                float limitedSpeed = Mathf.Clamp(rb2d.velocity.x, -speed, speed);
                rb2d.velocity = new Vector2(limitedSpeed, rb2d.velocity.y);
            }else if (!grappled){
                rb2d.AddForce(Vector2.right * airSpeed * h);
                float limitedSpeed = Mathf.Clamp(rb2d.velocity.x, -airSpeed, airSpeed);
                rb2d.velocity = new Vector2(limitedSpeed, rb2d.velocity.y);
            }

            if (Input.GetMouseButton(0) && !ableToGrapple){
                shoot.Fire();
            }

            if (jump){
                rb2d.velocity = new Vector2(rb2d.velocity.x, 0);
                rb2d.AddForce(Vector2.up * jumpForce, ForceMode2D.Impulse);
                jump = false;
            }
        }
    }

    void OnParticleCollision(GameObject col){
        Instantiate(death, transform.position, Quaternion.identity);
        Die();
    }
    void OnCollisionEnter2D(Collision2D col){
        if(col.gameObject.tag == "Death"){
            Instantiate(death, transform.position, Quaternion.identity);
            Die();
        }    
    }

    void Die(){
        foreach(SpriteRenderer s in deathDisable){
            s.enabled = false;
        }
        GetComponent<CapsuleCollider2D>().isTrigger = true;
        Invoke("Respawn", 2f);
        dead = true;
        rb2d.bodyType = RigidbodyType2D.Static;
    }

    void Respawn(){
        transform.position = lastCheckpoint;
        foreach (SpriteRenderer s in deathDisable){
            s.enabled = true;
        }
        GetComponent<CapsuleCollider2D>().isTrigger = false;
        rb2d.bodyType = RigidbodyType2D.Dynamic;
        rb2d.velocity = Vector2.zero;
        dead = false;
    }
}