using System;

public class Program

{   

    Camera cam

    private enum camBounds

    {

        minX = -10,

        minY = 5,

        minZ = -10,

        maxX = 10,

        maxY = 15,

        maxZ = 10

    };

    private void Start()

    {

        cam = GetComponent<Camera>();

    }

    private void Update()

    {

        //WASD MOVEMENT

        //Forward camera movement

        if (Input.GetKeyDown(Keycode.W) && !AtBounds("z"))

        {

            transform.position += Vector3.forward;

        }

        //Left camera movement

        if (Input.GetKeyDown(Keycode.A) && !AtBounds("x"))

        {

            transform.position += Vector3.left;

        }

        //Backwards camera movement

        if (Input.GetKeyDown(Keycode.S) && !AtBounds("z"))

        {

            transform.position += Vector3.back;

        }

        //Right camera movement

        if (Input.GetKeyDown(Keycode.D) && !AtBounds("x"))

        {

            transform.position += Vector3.right;

        }

        //SCROLL WHEEL ZOOM

        //Zoom in

        if (Input.GetAxis("Mouse ScrollWheel") > 0) 

        {

              cam.orthographicSize += 1;

        }

        //Zoom out

        if (Input.GetAxis("Mouse ScrollWheel") < 0) 

        {

              cam.orthographicSize -= 1;

        }

        //ALTITUDE MOVEMENT

        //Upwards camera movement

        if (Input.GetKeyDown(Keycode.Q) && !AtBounds("y"))

        {

            transform.position += Vector3.up;

        }

        //Downwards camera movement

        if (Input.GetKeyDown(Keycode.Z) && !AtBounds("y"))

        {

            transform.position += Vector3.down;

        }

    }

    private bool AtBounds(string axis)

    {

        camBounds min;

        camBounds max;

        switch (axis.ToLower())

        {

            case "x":

                min = camBounds.minX;

                max = camBounds.maxX;

                break;

            case "Y":

                min = camBounds.minY;

                max = camBounds.maxY;

                break;

            case "Z":

                min = camBounds.minZ;

                max = camBounds.maxZ;

                break;

            default:

                print("No axis defined in [AtBounds()] in [CameraControls]");

                return true;

        }

        //If the camera is less than the min or more than the max of the axis, return true (cam is at (or past) the bounds)

        if ((transform.position <= min) || transform.position >= max)

            return true;

        //Else the camera is not at or past the bounds of the given axis

        else

            return false;

    }

}