using UnityEngine;
using System.Collections;

public class ufoController : MonoBehaviour {

    public Transform mainUFO;
    public float sensitivity;
    public float speed;
    public float smoothness = 0.3f;
    public float bobSmoothness = 0.4f;
    public Transform originalPos;
    public Transform targetForward;
    public Transform targetBackwards;
    public Transform targetLeft;
    public Transform targetRight;
    public Transform targetUp;
    public Transform targetDown;
    public Vector3 priVelocity;
    Rigidbody rb;
    Animation anim;

    void Start ()
    {
        rb = GetComponent<Rigidbody>();
        anim = mainUFO.GetComponent<Animation>();
    }

    void FixedUpdate ()
    {
        //Movement
        float xPos = Input.GetAxisRaw("Horizontal");
        float zPos = Input.GetAxisRaw("Vertical");

        Vector3 xMov = Camera.main.transform.right * xPos;
        Vector3 zMov = Camera.main.transform.forward * zPos;

        priVelocity = (xMov + zMov).normalized * speed;

        if (priVelocity != Vector3.zero)
        {
            rb.MovePosition(rb.position + priVelocity * Time.deltaTime);

            anim["Idle"].wrapMode = WrapMode.Once;
            anim.PlayQueued("Nothing");
            anim.Stop("Nothing");
        } else
        {
            anim["Idle"].wrapMode = WrapMode.Default;
            StartCoroutine(delayIdle());
        }

        //Camera
        float yRot = Input.GetAxisRaw("Mouse X");

        Vector3 vectorY = new Vector3(0, 0, yRot) * sensitivity;
        rb.MoveRotation(rb.rotation * Quaternion.Euler(vectorY));

        //More movement
        Vector3 vel = Vector3.zero;
        if (Input.GetKey(KeyCode.W))
        {
            Vector3 targetPosForward = new Vector3(targetForward.transform.position.x, targetForward.transform.position.y, targetForward.transform.position.z);
            mainUFO.transform.position = Vector3.SmoothDamp(mainUFO.transform.position, targetPosForward, ref vel, smoothness);
        } else
        {
            Vector3 originalPosPos = new Vector3(originalPos.transform.position.x, originalPos.transform.position.y, originalPos.transform.position.z);
            mainUFO.transform.position = Vector3.SmoothDamp(mainUFO.transform.position, originalPosPos, ref vel, smoothness);
        }


        if (Input.GetKey(KeyCode.S))
        {
            Vector3 targetPosBackwards = new Vector3(targetBackwards.transform.position.x, targetBackwards.transform.position.y, targetBackwards.transform.position.z);
            mainUFO.transform.position = Vector3.SmoothDamp(mainUFO.transform.position, targetPosBackwards, ref vel, smoothness);
        }
        else
        {
            Vector3 originalPosPos = new Vector3(originalPos.transform.position.x, originalPos.transform.position.y, originalPos.transform.position.z);
            mainUFO.transform.position = Vector3.SmoothDamp(mainUFO.transform.position, originalPosPos, ref vel, smoothness);
        }

        //Bobbing
        float bobX = Input.GetAxisRaw("Mouse X");
        float bobY = -Input.GetAxisRaw("Mouse Y");

        if (bobX < 0)
        {
            //left
            Vector3 targetPosLeft = new Vector3(targetLeft.transform.position.x, targetLeft.transform.position.y, targetLeft.transform.position.z);
            mainUFO.transform.position = Vector3.SmoothDamp(mainUFO.transform.position, targetPosLeft, ref vel, bobSmoothness);
        } else if (bobX > 0)
        {
            //right
            Vector3 targetPosRight = new Vector3(targetRight.transform.position.x, targetRight.transform.position.y, targetRight.transform.position.z);
            mainUFO.transform.position = Vector3.SmoothDamp(mainUFO.transform.position, targetPosRight, ref vel, bobSmoothness);
        }

        if (bobY < 0)
        {
            //up
            Vector3 targetPosUp = new Vector3(targetUp.transform.position.x, targetUp.transform.position.y, targetUp.transform.position.z);
            mainUFO.transform.position = Vector3.SmoothDamp(mainUFO.transform.position, targetPosUp, ref vel, bobSmoothness);
        }
        else if (bobY > 0)
        {
            //down
            Vector3 targetPosDown = new Vector3(targetDown.transform.position.x, targetDown.transform.position.y, targetDown.transform.position.z);
            mainUFO.transform.position = Vector3.SmoothDamp(mainUFO.transform.position, targetPosDown, ref vel, bobSmoothness);
        }
    }

    IEnumerator delayIdle ()
    {
        yield return new WaitForSeconds(1.5f);

        if (priVelocity == Vector3.zero)
        {
            anim.Play("Idle");
        }
    }

}