using UnityEngine;
using System.Collections;

public class ExplorationCamera : MonoBehaviour
{
    //Turn
    [Range(1f, 50)]
    public float sensitivity = 30;
    [Range(.1f, 50)]
    public float smoothing = 5f;

    //Movement
    private float speedZ;
    private float speedX;
    private float speedY;
    [Range(.1f, 10)]
    public float Speed = .1f;
    [HideInInspector]
    public float InitialSpeed = .1f;
    [HideInInspector]
    public float FOV;
    private float initialFOV;
    Vector2 initialLook;
    Vector2 Look;
    private Vector3 MovementDirection;
    public float MaxAcceleration = 4;
    [Range(1f, 10)]
    public float AccelerationSmoothing = 10, SpeedSmooth = 1;
    Vector2 _smoothMouse;
    public bool HideCursor = false;
    float focalLength = 0, focalSize = 1;
    public bool ConstantMove = false;
    Camera ThisCamera;
    [HideInInspector]
    public float tilt;
    void Start()
    {
       
        try
        {
            //gamepad
            Input.GetAxis("LookHorizontal");
        }
        catch
        {
            print("Import the custom input to support gamepad in this camera script\n http://davidmiranda.me/files/FogVolume3/InputManager.asset");
        }


        //if (this.GetComponent<UnityStandardAssets.ImageEffects.DepthOfField>())
        //{
        //    focalLength = this.GetComponent<UnityStandardAssets.ImageEffects.DepthOfField>().focalLength;
        //    focalSize = this.GetComponent<UnityStandardAssets.ImageEffects.DepthOfField>().focalSize;
        //}
    }
    Vector2 lastPos;

    void OnGUI()
    {
        //ratón
        if (Event.current.type == EventType.MouseDown)
        {
            lastPos = Event.current.mousePosition;
        }
        else if (Event.current.type == EventType.MouseDrag || Event.current.type == EventType.MouseMove)
        {
            Vector3 diff = Event.current.mousePosition - lastPos;
            Look += new Vector2(diff.x * sensitivity / 50, -diff.y * sensitivity / 50);
            lastPos = Event.current.mousePosition;
        }
    }
    public float tiltSmoothing = 50, FOVTransitionSpeed = .1f;
    public float inclination = 13;
    public bool ApplyGravity;
    [Range(0f, 1)]
    public float gravityAccelerationScale = .1f;
    void OnDestroy()
    { Cursor.visible = true; }
    void FixedUpdate()
    {
        //       if (Input.GetKey(KeyCode.Escape)) Application.Quit();



        try
        {
            //gamepad
            if (Mathf.Abs(Input.GetAxis("LookHorizontal")) > 0.017f || Mathf.Abs(Input.GetAxis("LookVertical")) > 0.017f)
            {
                Look += new Vector2(Input.GetAxis("LookHorizontal"), -Input.GetAxis("LookVertical")) * sensitivity;

                if (Input.GetAxis("LookHorizontal") > 0)
                    tilt = Mathf.Lerp(tilt, -inclination * Mathf.Abs(Input.GetAxis("LookHorizontal")) * sensitivity, 1f / tiltSmoothing);
                else
                    tilt = Mathf.Lerp(tilt, inclination * Mathf.Abs(Input.GetAxis("LookHorizontal")) * sensitivity, 1f / tiltSmoothing);


            }
        }
        catch
        {
            //
        }
        tilt = Mathf.Lerp(tilt, 0, 1f / tiltSmoothing);
        //DOF
        if (Input.GetKey(KeyCode.PageDown))
            focalLength -= .05f;
        if (Input.GetKey(KeyCode.PageUp))
            focalLength += .05f;

        if (Input.GetKey(KeyCode.End))
            focalSize -= .05f;
        if (Input.GetKey(KeyCode.Home))
            focalSize += .05f;
        //if (this.GetComponent<UnityStandardAssets.ImageEffects.DepthOfField>())
        //{
        //    this.GetComponent<UnityStandardAssets.ImageEffects.DepthOfField>().focalLength = focalLength;
        //    this.GetComponent<UnityStandardAssets.ImageEffects.DepthOfField>().focalSize = focalSize;
        //}
        //Turn interpolation
        _smoothMouse.x = Mathf.Lerp(_smoothMouse.x, Look.x, 1f / smoothing);
        _smoothMouse.y = Mathf.Lerp(_smoothMouse.y, Look.y, 1f / smoothing);

        //Aplica giro suave
        transform.localEulerAngles = new Vector3(-_smoothMouse.y, _smoothMouse.x, tilt);


        //Traslación:
        if (Input.GetKey(KeyCode.W) || Input.GetAxis("Vertical") > 0 || ConstantMove)
        {
            MovementDirection = new Vector3(0, 0, 1);
            speedZ = Mathf.Lerp(speedZ, Speed, 1f / smoothing);
        }



        if (Input.GetKey(KeyCode.S) || Input.GetAxis("Vertical") < 0)
        {
            MovementDirection = new Vector3(0, 0, -1);
            speedZ = Mathf.Lerp(speedZ, -Speed, 1f / smoothing);
        }



        if (Input.GetKey(KeyCode.A) || Input.GetAxis("Horizontal") < 0)
        {
            MovementDirection = new Vector3(-1, 0, 0);
            speedX = Mathf.Lerp(speedX, -Speed, 1f / smoothing);

        }

        if (Input.GetKey(KeyCode.D) || Input.GetAxis("Horizontal") > 0)
        {
            MovementDirection = new Vector3(1, 0, 0);
            speedX = Mathf.Lerp(speedX, Speed, 1f / smoothing);

        }


        if (Input.GetKey(KeyCode.Q) || Input.GetKey(KeyCode.JoystickButton4))
        {
            MovementDirection = new Vector3(0, -1, 0);
            speedY = Mathf.Lerp(speedY, -Speed, 1f / smoothing);
        }
        if (Input.GetKey(KeyCode.E) || Input.GetKey(KeyCode.JoystickButton5))
        {
            MovementDirection = new Vector3(0, 1, 0);
            speedY = Mathf.Lerp(speedY, Speed, 1f / smoothing);
        }

        //desaceleración
        speedZ = Mathf.Lerp(speedZ, 0, 1f / smoothing);
        MovementDirection.z = speedZ;
        speedY = Mathf.Lerp(speedY, 0, 1f / smoothing);
        MovementDirection.y = speedY;
        speedX = Mathf.Lerp(speedX, 0, 1f / smoothing);
        MovementDirection = new Vector3(speedX, speedY, speedZ);
        if (ApplyGravity)
        {
            MovementDirection += Physics.gravity * gravityAccelerationScale;
        }
        transform.Translate(MovementDirection);
        // transform.Rotate(Vector3.forward, tilt * 150);
        //Speed Ratón
        Speed = Mathf.Clamp(Speed, .001f, 100f);
        if (Input.GetMouseButton(1))
        {
            InitialSpeed += Input.GetAxis("Mouse ScrollWheel") * .5f;
            InitialSpeed = Mathf.Max(.1f, InitialSpeed);
        }
        //FOV
        if (Input.GetMouseButton(1) & Input.GetKey(KeyCode.C) & FOV > 5)
        {
            FOV -= 1;
        }
        if (Input.GetMouseButton(1) & Input.GetKey(KeyCode.Z) & FOV < 120)
        {
            FOV += 1;
        }

        //Al soltar la tecla:
        if (Input.GetMouseButton(1) == false)
        {
            FOV = Mathf.Lerp(FOV, initialFOV, FOVTransitionSpeed);//El último valor sería la velocidad a la que vuelve al fov original
                                                                  //Rueda:
                                                                  // speedZ += Input.GetAxis("Mouse ScrollWheel");
        }
        //Aplicar
        //
        //
        if (ThisCamera)
            if (ThisCamera.stereoEnabled == false)
                GetComponent<Camera>().fieldOfView = FOV;


    }
    float TriggerValue = 0;

    void Update()
    {


        //Extra velocidad:
        try
        {
            TriggerValue = Mathf.Pow(Input.GetAxis("FasterCamera") * 1 / AccelerationSmoothing + 1, 2);
        }
        catch { }
        //print(Speed);
        if (Input.GetKeyDown(KeyCode.LeftShift))
        {

            Speed *= MaxAcceleration;

        }

        try
        {
            if (Input.GetAxis("FasterCamera") > 0 && Speed < InitialSpeed * MaxAcceleration)
            {
                Speed *= TriggerValue;

            }
            else
                if (!Input.GetKey(KeyCode.LeftShift))
                Speed = Mathf.Lerp(Speed, InitialSpeed, 1 / AccelerationSmoothing);
        }
        catch
        {
            if (!Input.GetKey(KeyCode.LeftShift))
                Speed = Mathf.Lerp(Speed, InitialSpeed, 1 / AccelerationSmoothing);
        }
        //  print(Speed);
        if (Input.GetKeyUp(KeyCode.LeftShift))
        {
            Speed /= MaxAcceleration;
        }
    }


    void OnEnable()
    {
        if (GetComponent<Camera>())
            ThisCamera = GetComponent<Camera>();
        InitialSpeed = Speed;
        if (HideCursor)
            Cursor.visible = false;

        if(ThisCamera)
        FOV = this.gameObject.GetComponent<Camera>().fieldOfView;
        initialFOV = FOV;
        initialLook = new Vector2(transform.eulerAngles.y, transform.eulerAngles.x * -1);
        //	Debug.Log (transform.eulerAngles);
        Look = initialLook;
        _smoothMouse = initialLook;
    }
}