using UnityEngine;
using System.Collections;

public class GenericTurret : MonoBehaviour {

    //this code is designed to be mounted on a "turret holder." The gameobject this script lives on doesn't turn when targeting.

    //child objects
    public Transform turret;
    public Transform gun;

    //the direction we want the guns to face.
    public Vector3 targetDirection = Vector3.right;

    //tweakables
    public float maxYaw = 80f;
    public float minYaw = -80f;

    public float maxPitch = 10f;
    public float minPitch = -45f;

    public float yawSpeed = 30f;    //in degrees per second.
    public float pitchSpeed = 60f;  //in degrees per second.

	// Update is called once per frame
    void FixedUpdate()
    {


	    //convert targeting to local reference frame
        Vector3 localTarget = transform.InverseTransformDirection(targetDirection).normalized;

        //get the component angles
        float _yaw = Mathf.Atan2(localTarget.x, localTarget.z) * Mathf.Rad2Deg;
        float _pitch = Mathf.Atan2(-localTarget.y, localTarget.z) * Mathf.Rad2Deg;

        //clam our rotations
        _yaw = Mathf.Clamp(_yaw, minYaw, maxYaw);
        _pitch = Mathf.Clamp(_pitch, minPitch, maxPitch);

        Debug.Log(_yaw);

        //turn them into quaternions.
        Quaternion desiredYaw = Quaternion.AngleAxis(_yaw, Vector2.up);
        Quaternion desiredPitch = Quaternion.AngleAxis(_pitch, Vector2.right);

        turret.localRotation = Quaternion.RotateTowards(turret.localRotation, desiredYaw, yawSpeed * Time.fixedDeltaTime);
//        gun.localRotation = Quaternion.RotateTowards(gun.localRotation, desiredPitch, pitchSpeed * Time.fixedDeltaTime);
	}
}