using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class FreeCamera : MonoBehaviour
{
    public Camera freeCamera;
    public float movementSpeed = 5f;
    public float movementSpeedFaster = 20f;
    public float movementSpeedSlower = 2f;
    public float freeLookSensitivity = 5f;
    public float fieldOfView = 60f;
    [HideInInspector] public float clippingFarPlanes;
    public float zoomSensitivity = 10f;
    public float cameraRoll = 0f;

    private float movementSpeedDefault; //Saves the movement speed Original value.
    [HideInInspector] public float fieldOfViewDefault;
    [HideInInspector] public float clippingPlanesFarDefault;
    [HideInInspector] public float cameraRollDefault;
    private bool looking = false;
    private bool CanLook = false;
    private bool CameraRollMaxValue = false;
    private bool CameraRollNegativeMaxValue = false;
    private bool CameraIsMovingFaster;
    private bool CameraIsMovingSlower;

    [HideInInspector] public float newRotationX;
    [HideInInspector] public float newRotationY;

    public Vector2 pitchMinMax = new Vector2(-90, 90); // Έχουν οριστεί οι περιορισμοί σε -90 και 90 για πάνω και κάτω
    public float mouseSensitivity = 10;
    [HideInInspector] public float yaw;
    [HideInInspector] public float pitch;

    private static FreeCamera _instance;
    public static FreeCamera GetInstance() { return _instance; }

    private void Awake()
    {
        if (!_instance)
        {
            _instance = this;
        }

        clippingFarPlanes = freeCamera.farClipPlane;
        clippingPlanesFarDefault = clippingFarPlanes;
    }

    void Start()
    {
        movementSpeedDefault = movementSpeed; //Saves the movement speed value.
        cameraRollDefault = cameraRoll;
        fieldOfViewDefault = fieldOfView;
    }

    void Update()
    {
        UpdateCameraFieldOfView();

        #region Move camera faster or Slower
        if (Input.GetKey(KeyCode.LeftShift) || Input.GetKey(KeyCode.RightShift) && CameraIsMovingFaster)
        {
            movementSpeed = movementSpeedFaster;
            CameraIsMovingFaster = true;
        }
        else if (CameraIsMovingFaster)
        {
            movementSpeed = movementSpeedDefault;
            CameraIsMovingFaster = false;
        }

        if (Input.GetKey(KeyCode.LeftControl))
        {
            movementSpeed = movementSpeedSlower;
            CameraIsMovingSlower = true;
        }
        else if (CameraIsMovingSlower)
        {
            movementSpeed = movementSpeedDefault;
            CameraIsMovingSlower = false;
        }
        #endregion

        #region WASD Navigation Camera Movement
        if (Input.GetKey(KeyCode.W) || Input.GetKey(KeyCode.UpArrow))
        {
            transform.position = transform.position + (transform.forward * movementSpeed * Time.unscaledDeltaTime);
        }

        if (Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.LeftArrow))
        {
            transform.position = transform.position + (-transform.right * movementSpeed * Time.unscaledDeltaTime);
        }

        if (Input.GetKey(KeyCode.S) || Input.GetKey(KeyCode.DownArrow))
        {
            transform.position = transform.position + (-transform.forward * movementSpeed * Time.unscaledDeltaTime);
        }

        if (Input.GetKey(KeyCode.D) || Input.GetKey(KeyCode.RightArrow))
        {
            transform.position = transform.position + (transform.right * movementSpeed * Time.unscaledDeltaTime);
        }
        #endregion

        #region Controller Input
        yaw = Input.GetAxis("Joystick Horizontal");
        pitch = Input.GetAxis("Joystick Vertical");

        if (pitch > 0)
        {
            transform.position = transform.position + (transform.forward * movementSpeed * Time.unscaledDeltaTime);
        }
        else if (pitch < 0)
        {
            transform.position = transform.position + (-transform.forward * movementSpeed * Time.unscaledDeltaTime);
        }
        if (yaw > 0)
        {
            transform.position = transform.position + (transform.right * movementSpeed * Time.unscaledDeltaTime);
        }
        else if (yaw < 0)
        {
            transform.position = transform.position + (-transform.right * movementSpeed * Time.unscaledDeltaTime);
        }
        #endregion

        #region Up & Down Camera Movement
        if (Input.GetKey(KeyCode.Q))
        {
            transform.position = transform.position + (-transform.up * movementSpeed * Time.unscaledDeltaTime);
        }
        if (Input.GetKey(KeyCode.E))
        {
            transform.position = transform.position + (transform.up * movementSpeed * Time.unscaledDeltaTime);
        }
        #endregion

        newRotationX = transform.localEulerAngles.y;

        #region Camera roll
        if (Input.GetKey(KeyCode.G) && CameraRollMaxValue == false)
        {
            cameraRoll -= 15 * Time.unscaledDeltaTime;
            transform.localEulerAngles = new Vector3(newRotationY, newRotationX, cameraRoll);
            PhotomodeManager.GetInstance().CanHoldDownSlider = false;
        }
        else if (Input.GetKey(KeyCode.F) && CameraRollNegativeMaxValue == false)
        {
            cameraRoll += 15 * Time.unscaledDeltaTime;
            transform.localEulerAngles = new Vector3(newRotationY, newRotationX, cameraRoll);
            PhotomodeManager.GetInstance().CanHoldDownSlider = false;
        }
        else
        {
            PhotomodeManager.GetInstance().CanHoldDownSlider = true;
        }

        #region Camera roll Max values events
        if (cameraRoll <= -90)
        {
            CameraRollMaxValue = true;
            CameraRollNegativeMaxValue = false;
        }
        else
        {
            CameraRollMaxValue = false;
        }

        if (cameraRoll >= 90)
        {
            CameraRollMaxValue = false;
            CameraRollNegativeMaxValue = true;
        }
        else
        {
            CameraRollNegativeMaxValue = false;
        }
        #endregion

        #endregion      

        if (looking)
        {
            // Αντιστροφή του άξονα Y για την κίνηση του ποντικιού
            newRotationY = transform.localEulerAngles.x - Input.GetAxis("Mouse Y") * freeLookSensitivity; // Αντιστροφή του άξονα Y
            // Περιορισμός του pitch στις -90 και 90 μοίρες
            if (newRotationY > 180) newRotationY -= 360; // Για να είναι ο περιορισμός πιο ακριβής
            newRotationY = Mathf.Clamp(newRotationY, pitchMinMax.x, pitchMinMax.y); // Περιορισμός της κίνησης

            newRotationX = transform.localEulerAngles.y + Input.GetAxis("Mouse X") * freeLookSensitivity; // Κίνηση στον άξονα X

            transform.localEulerAngles = new Vector3(newRotationY, newRotationX, cameraRoll);
        }

        if (Input.GetKeyDown(KeyCode.Mouse1))
        {
            StartLookingAround();
        }
        else if (Input.GetKeyUp(KeyCode.Mouse1))
        {
            StopLookingAround();
        }

        #region Controller Camera look around Input
        if (InputControlManager.Getinstance().IsUsingJoystick)
        {
            // Αντιστροφή του άξονα Y για το joystick
            newRotationY = transform.localEulerAngles.x - Input.GetAxis("Joystick Y") * freeLookSensitivity; // Αντιστροφή του άξονα Y
            if (newRotationY > 180) newRotationY -= 360; // Για να είναι ο περιορισμός πιο ακριβής
            newRotationY = Mathf.Clamp(newRotationY, pitchMinMax.x, pitchMinMax.y); // Περιορισμός της κίνησης

            newRotationX = transform.localEulerAngles.y + Input.GetAxis("Joystick X") * freeLookSensitivity; // Κίνηση στον άξονα X

            transform.localEulerAngles = new Vector3(newRotationY, newRotationX, cameraRoll);
        }
        #endregion
    }

    public void StartLookingAround()
    {
        looking = true;
        Cursor.visible = false;
        Cursor.lockState = CursorLockMode.Locked;
    }

    public void StopLookingAround()
    {
        looking = false;
        Cursor.visible = true;
        Cursor.lockState = CursorLockMode.None;
    }

    public void UpdateCameraFieldOfView()
    {
        freeCamera.fieldOfView = fieldOfView;
    }
}