using UnityEngine;
using System.Collections;

[RequireComponent(typeof(Rigidbody2D))]
public class PlayerController : InteractableObject {

    public GameObject bullet;

    public float speed;
    public float spinSpeed = 5f;
    public int health;
    public Renderer healthMat;
    public Color[] healthColor;

    public GameObject Explosion;
    public ParticleSystem boostEffect;
    private int bulletDirection = -1;
    private Rigidbody2D rigid;
    private float lastHit = 0.0f;
    private bool isImmobilized = false;

    // Use this for initialization
    void Start() {
        rigid = GetComponent<Rigidbody2D>();
        rigid.AddForce(transform.right * 200);

    }

    // Update is called once per frame
    void Update() {

    }




    public void rotatePlayer() {
        if (isImmobilized)
            return;

        rigid.velocity = Vector3.zero;
        transform.Rotate(new Vector3(0, 0, spinSpeed) * 50 * Time.deltaTime);


    }

    public void movePlayer() {
        if (isImmobilized)
            return;

        //Debug.Log(transform.rotation.eulerAngles.z * Mathf.Deg2Rad);
        boostEffect.startRotation = -transform.rotation.eulerAngles.z * Mathf.Deg2Rad;
        boostEffect.Play();
        rigid.AddForce(transform.right * speed,ForceMode2D.Impulse);


    }



    GameObject findClosestTarget() {

        GameObject[] targets = GameObject.FindGameObjectsWithTag("Enemy");

        GameObject tMin = null;
        float minDist = Mathf.Infinity;
        Vector3 currentPos = transform.position;
        foreach (GameObject t in targets) {
            float dist = Vector3.Distance(t.transform.position, currentPos);
            if (dist < minDist) {
                tMin = t;
                minDist = dist;
            }
        }
        return tMin;
    }

    public void shoot() {
        if (isImmobilized)
            return;

        GameObject bulletClone = (GameObject)Instantiate(bullet, transform.position + (transform.up * bulletDirection * 0.1f), transform.rotation);
        MissileController bulletScript = bulletClone.GetComponent<MissileController>();
        bulletScript.startVelocity = transform.up * bulletDirection;
        bulletDirection = -bulletDirection;

        bulletScript.ignoreList = GetComponents<Collider2D>();
        bulletScript.target = findClosestTarget();
        bulletScript.enabled = true;

    }

    private void ImmobilizePlayer() {
        isImmobilized = true;
        rigid.angularDrag = 0;
        rigid.drag = 1;
        rigid.constraints = RigidbodyConstraints2D.None;
    }

    public override void shot() {
        if (Time.time - lastHit < 1) {
            return;
        }
        health--;

        if (isImmobilized) {
            killPlayer();
        }

        if (health <= 0) {
            ImmobilizePlayer();
            health = 0;
        }
        healthMat.material.color = healthColor[3-health];
        lastHit = Time.time;       
    }

    private void killPlayer() {
        if (Explosion != null)
            DontDestroyOnLoad(Instantiate(Explosion, transform.position, transform.rotation));

        GameMemory.control.playerDeath();
        Destroy(this.gameObject, 0.1f);
    }


    public void setHealth(int input) {
        health = input;
        healthMat.material.color = healthColor[3 - health];
    }
}