using System;
using UnityEngine;
using UnityEngine.XR;

public class Rig : MonoBehaviour
{
  [Header("References")]
  public Design design;
  public Main main;
  public GameObject disconnected;
  public Transform head, con, lCon, hangingRod;
  public Camera recordCam;

  [Header("Variables")]
  public OVRInput.Controller ovrCon;
  public Quaternion controllerRot = Quaternion.identity;
  public Quaternion inputRot = Quaternion.identity;
  public Vector3 controllerPos, joystick;

  bool leftOn, rightOn, touchOn;
  Vector3 headOffset;
  public Vector3 boxShake, boxOffset;

  public bool alignRecordCam;

  void Start()
  {
    Game.OnBump += Bump;
    Game.OnCrash += Bump;

    // headOffset.y = 32f;
    headOffset.y = design.headOffset.y;
    headOffset.z = design.headOffset.z;

    recordCam.gameObject.SetActive(Application.isEditor);
  }

  Quaternion flipRot = Quaternion.identity;
  float flipEuler = 180;
  public Lerper lerper;
  void Update()
  {
    // Input System
    UnityEngine.XR.XRDevice.DisableAutoXRCameraTracking(Camera.main, true);
    leftOn = OVRInput.IsControllerConnected(OVRInput.Controller.LTrackedRemote);
    rightOn = OVRInput.IsControllerConnected(OVRInput.Controller.RTrackedRemote);
    touchOn = OVRInput.IsControllerConnected(OVRInput.Controller.RTouch);

    if (leftOn || rightOn || touchOn)
    {
      if (leftOn) { ovrCon = OVRInput.Controller.LTrackedRemote; }
      else if (rightOn) { ovrCon = OVRInput.Controller.RTrackedRemote; }
      else if (touchOn) { ovrCon = OVRInput.Controller.RTouch; }

      disconnected.SetActive(false);
      Time.timeScale = 1;
    }
    else
    {
      disconnected.SetActive(true);
      Time.timeScale = 0;
    }

    // Apply to Transforms
    Quaternion flip = Quaternion.identity;
    head.localPosition = InputTracking.GetLocalPosition(XRNode.Head);
    head.localRotation = InputTracking.GetLocalRotation(XRNode.Head);
    con.localPosition = InputTracking.GetLocalPosition(XRNode.RightHand);
    con.localRotation = InputTracking.GetLocalRotation(XRNode.RightHand);
    lCon.localPosition = InputTracking.GetLocalPosition(XRNode.LeftHand);
    lCon.localRotation = InputTracking.GetLocalRotation(XRNode.LeftHand);

    // °inview
    if (OVRInput.GetDown(OVRInput.Button.PrimaryHandTrigger, ovrCon))
    {
      flipEuler *= -1;
      lerper.t *= -1;
    }
    transform.localScale = Vector3.one * design.scale;
    Quaternion targetRot = Quaternion.Euler(0, flipEuler, 0);
    if (OVRInput.Get(OVRInput.Button.PrimaryHandTrigger, ovrCon))
    {
      lerper.Update(1);
    }
    else
    {
      lerper.Update(0);
    }
    flipRot = Quaternion.SlerpUnclamped(Quaternion.identity, targetRot, lerper.t);
    transform.rotation = flipRot;
    transform.position = flipRot * -head.localPosition * design.scale;
    transform.position += design.pivotPos + (head.rotation * headOffset);

    // Shake
    boxShake = Vector3.Lerp(boxShake, (boxShake - boxOffset) * 0.5f, design.boxSpring * Time.deltaTime);
    boxOffset += boxShake * design.boxSpring * Time.deltaTime;
    transform.position += boxOffset;

    // Hanging Rod
    hangingRod.position = design.pivotPos;
    hangingRod.rotation = head.rotation;

    // Record Cam
    Vector3 twoDir = new Vector3(head.position.x, 0, head.position.z).normalized;
    Vector3 recPos = (Quaternion.LookRotation(twoDir) * new Vector3(0.5f, 0.25f, 0.5f).normalized * 40);
    if (alignRecordCam)
    {
      recordCam.transform.position = recPos;
      recordCam.transform.rotation = Quaternion.LookRotation(-recPos);
    }

    // °fullrot
    // inputRot = controllerRot = OVRInput.GetLocalControllerRotation(remote);


    // point & swipe swap/choose
    // both hands? (nah makes point the odd one out)
    // HOW TO FILTER OUT THE SPIN CHAIR VEL? (LCON? NAH... BUT MIGHT BE GOOD FOR TESTINGs)
    // flip view? what about 90/45 degree snaps ( or drag view!? )
    // all oculus bs pulled filtered through a single file
    // menu system cull

    // PRIORITY
    // starting scene! the sooner the better ( break things! )
    // refactor like vader life alyx!


    // °dragdir
    Vector3 conVel = flipRot * (con.localPosition - oldConPos) / Time.deltaTime;
    OVRInput.SetControllerVibration(0, 0, OVRInput.Controller.RTouch);
    if (OVRInput.Get(OVRInput.Button.PrimaryIndexTrigger, ovrCon))
    {
      if (conVel.magnitude > 0.05f)
      {
        OVRInput.SetControllerVibration(1, 0.1f, OVRInput.Controller.RTouch);
      }

      rawDir = (rawDir + conVel * Time.deltaTime * 30).normalized;
    }
    inputRot = Quaternion.LookRotation(rawDir);
    oldConPos = con.localPosition;
  }
  Vector3 oldConPos;
  Vector3 rawDir = Vector3.forward;

  public Vector3Int InputDirection(Main main)
  {
    Vector3Int newDir = Main.SnapDir((inputRot * Vector3.forward));

    // no neck snaps
    if (main.snake[0] + newDir != main.snake[1])
    {
      return newDir;
    }

    return main.dir;
  }

  void Bump(Vector3 dir)
  {
    boxShake -= dir;
  }
}

[Serializable]
public class Lerper
{
  public float t = 0;
  public float spring = 1;
  public float dampen = 1;
  float vel;

  public void Update(float to = 1, bool bounce = false)
  {
    float dir = to - t;
    vel += dir * spring * Time.deltaTime;

    if (Mathf.Sign(vel) != Mathf.Sign(dir))
    {
      vel *= 1 - (dampen * Time.deltaTime);
    }
    else
    {
      vel *= 1 - (dampen * 0.33f * Time.deltaTime);
    }

    float newt = t + vel * Time.deltaTime;
    if (bounce && (newt < 0 || newt > 1))
    {
      vel *= -0.5f;
      newt = Mathf.Clamp01(newt);
    }

    t = newt;
  }

  public void Reset()
  {
    t = vel = 0;
  }
}