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

public class SpaceshipController : MonoBehaviour {

    public float rotationSpeed = 200f;
    public float thrustForce = 5f;
    private Rigidbody2D _rigidBody2d;

    public float maxLandVelocity = 1.0f;
    public float minAligmnentCollissionRatio = 0.97f;

    void Start () {
        _rigidBody2d = GetComponent<Rigidbody2D>();
    }

    private void OnCollisionEnter2D(Collision2D collision) {
        Vector2 colVector = collision.contacts[0].point - (Vector2)collision.collider.transform.position;
        float alignmentCollisionRatio = Vector2.Dot(colVector.normalized, transform.rotation * Vector2.up);
        if (_rigidBody2d.velocity.magnitude <= maxLandVelocity && alignmentCollisionRatio > minAligmnentCollissionRatio) {
            _rigidBody2d.velocity = Vector3.zero;
            _rigidBody2d.angularVelocity = 0.0f;
            Debug.Log("Landed like a champ");
        }
        else {
            //TODO: blow this bitch up
            _rigidBody2d.velocity = Vector3.zero;
            _rigidBody2d.angularVelocity = 0.0f;
            transform.position = new Vector3(0, 0, 0);
            Debug.Log("morreu jovem, volte pro meio do mapa");
        }
    }

    void Update () {
        // Rotate if it's not landed
        if (_rigidBody2d.velocity.magnitude > 0) {
            transform.Rotate(0, 0, -Input.GetAxis("Horizontal") * rotationSpeed * Time.deltaTime);
        }

        // Thrust foward but never backwards
        GetComponent<Rigidbody2D>().
            AddForce(transform.up * thrustForce *
                Mathf.Max(0, Input.GetAxis("Vertical")));
    }
}