using UnityEngine;

public class CameraControl : MonoBehaviour
{

    public bool rotate = true;
    public float mouseSensitivity = 6f;
    public float scrollSensitivity = 8f;
    public float scrollDampening = 10f;
    public float orbitDampening = 13f;

    public float cameraSpeed = 0.7f;
    public float cameraSpeedDampening = 0.03f;
    public float speedY = 0;
    float speedX = 0;

    public bool cameraEnabled = false;

    private Transform xFormParent;
    private Transform xFormParentParent;
    private Transform xFormCamera;

    public Vector3 startPosition;
    public float positionY;
    public float positionX;

    public Vector3 localRotation;
    public float cameraDistance = 20f;

    private void Start()
    {
        this.xFormCamera = this.transform;
        this.xFormParent = this.transform.parent;
        this.xFormParentParent = this.transform.parent.parent;

        localRotation.x = -50f;
        localRotation.y = 30f;
        cameraDistance = 20f;
        startPosition = transform.position;
        positionY = startPosition.y;
    }

    void LateUpdate()
    {
        #region enableCamera
        if (Input.GetKey(KeyCode.LeftAlt) && Input.GetKey(KeyCode.Mouse0) || Input.GetKey(KeyCode.Mouse2))
            cameraEnabled = true;
        else
            cameraEnabled = false;
        #endregion

        #region rotateCamera
        if (cameraEnabled)
        {
            //Camera Rotation based on mouse coordinates
            if(Input.GetAxis("Mouse X") != 0 || Input.GetAxis("Mouse Y" ) != 0)
            {
                localRotation.x += Input.GetAxis("Mouse X") * mouseSensitivity;
                localRotation.y -= Input.GetAxis("Mouse Y") * mouseSensitivity;

                //Clamp the y Rotation to horizon and not flipping over at the top
                if (localRotation.y < 0f)
                    localRotation.y = 0f;
                else if (localRotation.y > 90f)
                    localRotation.y = 90f;
            }
        }
        #endregion

        #region zooming
        //zooming from Mouse Scroll wheel
        if (Input.GetAxis("Mouse ScrollWheel") != 0f)
        {
            float scrollAmount = Input.GetAxis("Mouse ScrollWheel") * scrollSensitivity;

            //makes camera zoom faster the further away it is
            scrollAmount *= (this.cameraDistance * 0.3f);

            this.cameraDistance += scrollAmount * -1f;

            //clamp the camera distance
            if (cameraDistance < 2f)
                cameraDistance = 2f;
            else if (cameraDistance > 100f)
                cameraDistance = 100f;
        }
        #endregion

        #region CameraRig
        //Actual Camera Rig Transform
        Quaternion QT = Quaternion.Euler(localRotation.y, localRotation.x, 0);
        this.xFormParent.rotation = Quaternion.Lerp(this.xFormParent.rotation, QT, Time.deltaTime * orbitDampening);

        if (this.xFormCamera.localPosition.z != this.cameraDistance * -1f)
        {
            this.xFormCamera.localPosition = new Vector3(0f, 0f, Mathf.Lerp(this.xFormCamera.localPosition.z, this.cameraDistance * -1f, Time.deltaTime * scrollDampening));
        }
        #endregion


        //Camera Movement
        #region speedup
        if (Input.GetKey(KeyCode.LeftShift))
        {
            cameraSpeed = 1.3f;
        }
        else
            cameraSpeed = 0.7f;
        #endregion

        #region moveForwardBackward
        if (Input.GetKey(KeyCode.W))
        {
            MoveCamera();
            speedY += cameraSpeedDampening;
            if (speedY >= cameraSpeed)
                speedY = cameraSpeed;
        }
        else if (Input.GetKey(KeyCode.S))
        {
            MoveCamera();
            speedY -= cameraSpeedDampening;
            if (speedY <= cameraSpeed * -1)
                speedY = cameraSpeed * -1;
        }
        else if (speedY < 0.03 && speedY > -0.03)
            speedY = 0;
        else if (speedY > 0.01)
        {
            MoveCamera();
            speedY -= cameraSpeedDampening;
        }
        else if (speedY < -0.01)
        {
            MoveCamera();
            speedY += cameraSpeedDampening;
        }
        #endregion

        #region moveSideways
        if (Input.GetKey(KeyCode.A))
        {
            MoveCamera();
            speedX += cameraSpeedDampening;
            if (speedX >= cameraSpeed)
                speedX = cameraSpeed;
        }
        else if (Input.GetKey(KeyCode.D))
        {
            MoveCamera();
            speedX -= cameraSpeedDampening;
            if (speedX <= cameraSpeed * -1)
                speedX = cameraSpeed * -1;
        }
        else if (speedX < 0.03 && speedX > -0.03)
            speedX = 0;
        else if (speedX > 0.01)
        {
            MoveCamera();
            speedX -= cameraSpeedDampening;
        }
        else if (speedX < -0.01)
        {
            MoveCamera();
            speedX += cameraSpeedDampening;
        }
        #endregion
    }



    void MoveCamera()
    {
        positionY += speedY;
        positionX += speedX;
        this.transform.parent.parent.position = new Vector3(5+positionY, 1, -25+positionX);
    }

}