using UnityEngine;
using UnityEngine.SceneManagement;

public class Rocket : MonoBehaviour
{

    [SerializeField] float rcsThrust = 100f;
    [SerializeField] float mainThrust = 100f;
    [SerializeField] AudioClip mainEngine;
    [SerializeField] AudioClip success;
    [SerializeField] AudioClip death;

    Rigidbody rigidBody;
    AudioSource audioSource;

    enum State { Alive, Dying, Transcending }
    State state = State.Alive;


    // Start is called before the first frame update
    void Start()
    {
        rigidBody = GetComponent<Rigidbody>();
        audioSource = GetComponent<AudioSource>();
    }

    // Update is called once per frame
    void Update()
    {
        if (state == State.Alive)
            RespondToRotateInput();
            RespondToThrustInput();
    }

    void OnCollisionEnter(Collision collision)
    {
        if (state != State.Alive) {return;}
        switch (collision.gameObject.tag)
        {
            case "Friendly":
                break;
            case "Finish":
                StartSuccessSequence();
                break;
            default:
                StartDeathSequence();
                break;
        }
    }
    private void StartSuccessSequence()
    {
        state = State.Transcending;
        audioSource.Stop();
        audioSource.PlayOneShot(success);
        Invoke("LoadNextScene", 1f); //paramaterize this
    }
    private void StartDeathSequence()
    {
        state = State.Dying;
        audioSource.Stop();
        audioSource.PlayOneShot(death);
        Invoke("StartAgain", 1f);
    }



    private void StartAgain()
    {
        SceneManager.LoadScene(0);
    }

    private void LoadNextScene()
    {
        SceneManager.LoadScene(1);
    }

    private void RespondToThrustInput()
    {
        if (Input.GetKey(KeyCode.Space)) // can thrust while rotating
        {
            ApplyThrust();
        }
         else
            {
                audioSource.Stop();
            }
        }

    private void ApplyThrust()
    {
        rigidBody.AddRelativeForce(Vector3.up * mainThrust);
        if (!audioSource.isPlaying)
        {
            audioSource.PlayOneShot(mainEngine);
        }

    }
    private void RespondToRotateInput()
    {
        rigidBody.freezeRotation = true; // take manual control


        float rotationThisFrame = rcsThrust * Time.deltaTime;
        if (Input.GetKey(KeyCode.A))
        {

            transform.Rotate(Vector3.forward * rotationThisFrame);
        }

        else if (Input.GetKey(KeyCode.D))
        {

            transform.Rotate(-Vector3.forward * rotationThisFrame);
        }
        rigidBody.freezeRotation = false;
    }



}