using UnityEngine;
using System.Collections;
using UnityEngine.InputSystem;

namespace RootMotion
{
    
    public class CameraController : MonoBehaviour
    {

        [System.Serializable]
        public enum UpdateMode
        {
            Update,
            FixedUpdate,
            LateUpdate,
            FixedLateUpdate
        }

        public Transform target; // The target Transform to follow
        //public Transform rotationSpace; // If assigned, will use this Transform's rotation as the rotation space instead of the world space. Useful with spherical planets.
        public UpdateMode updateMode = UpdateMode.LateUpdate; // When to update the camera?
        public bool lockCursor = true; // If true, the mouse will be locked to screen center and hidden

        [Header("Position")]
        public bool smoothFollow; // If > 0, camera will smoothly interpolate towards the target
        public float followSpeed = 10f; // Smooth follow speed

        [Header("Rotation")]
        public float rotationSensitivity = 3.5f; // The sensitivity of rotation
        public float yMinLimit = -20; // Min vertical angle
        public float yMaxLimit = 80; // Max vertical angle
        public bool rotateAlways = true; // Always rotate to mouse?
       
        [Header("Distance")]
        public float distance = 10.0f; // The current distance to target
        public float minDistance = 4; // The minimum distance to target
        public float maxDistance = 10; // The maximum distance to target
        public float zoomSpeed = 10f; // The speed of interpolating the distance
        public float zoomSensitivity = 1f; // The sensitivity of mouse zoom

        [Header("Blocking")]
        public LayerMask blockingLayers;
        public float blockingRadius = 1f;
        public float blockingSmoothTime = 0.1f;
        public float blockingOriginOffset;

        public float x { get; private set; } // The current x rotation of the camera
        public float y { get; private set; } // The current y rotation of the camera
        public float distanceTarget { get; private set; } // Get/set distance

        private Vector3 targetDistance, position;
        private Quaternion rotation = Quaternion.identity;
        private Vector3 smoothPosition;
        private Camera cam;
        private bool fixedFrame;
        private float fixedDeltaTime;
        private Quaternion r = Quaternion.identity;
        private Vector3 lastUp;

        //Rotation       
       
        public void SetAngles(Quaternion rotation)
        {
            Vector3 euler = rotation.eulerAngles;
            this.x = euler.y;
            this.y = euler.x;
        }

        public void SetAngles(float yaw, float pitch)
        {
            this.x = yaw;
            this.y = pitch;
        }

        // Initiate, set the params to the current transformation of the camera relative to the target
        protected virtual void Awake()
        {
            //Vector3 angles = transform.eulerAngles;
            //x = angles.y;
            //y = angles.x;

            distanceTarget = distance;
            smoothPosition = transform.position;

            cam = GetComponent<Camera>();

            
        }

    

        protected virtual void Update()
        {
            if (updateMode == UpdateMode.Update) UpdateTransform();
        }

        protected virtual void FixedUpdate()
        {
            fixedFrame = true;
            fixedDeltaTime += Time.deltaTime;
            if (updateMode == UpdateMode.FixedUpdate) UpdateTransform();
        }

        protected virtual void LateUpdate()
        {
            UpdateInput();

            if (updateMode == UpdateMode.LateUpdate) UpdateTransform();

            if (updateMode == UpdateMode.FixedLateUpdate && fixedFrame)
            {
                UpdateTransform(fixedDeltaTime);
                fixedDeltaTime = 0f;
                fixedFrame = false;
            }
        }

        // Read the user input
        public void UpdateInput()
        {
            if (!cam.enabled) return;

            // Cursors
            Cursor.lockState = lockCursor ? CursorLockMode.Locked : CursorLockMode.None;
            Cursor.visible = lockCursor ? false : true;

            // Should we rotate the camera?
            bool rotate = rotateAlways;

            // delta rotation
            if (rotate)
            {
               // var _pass = _rotate.Player.CameraRotation.ReadValue<Vector2>();
                //x += _pass.normalized.x;
                //y = ClampAngle(y +_pass.normalized.y * rotationSensitivity, yMinLimit, yMaxLimit);
            }

            // Distance
            distanceTarget = Mathf.Clamp(distanceTarget + zoomAdd, minDistance, maxDistance);
        }

        // Update the camera transform
        public void UpdateTransform()
        {
            UpdateTransform(Time.deltaTime);
        }

        public void UpdateTransform(float deltaTime)
        {
            if (!cam.enabled) return;

            // Rotation
            //rotation = Quaternion.AngleAxis(x, Vector3.up) * Quaternion.AngleAxis(y, Vector3.right);
            

            if (target != null)
            {
                // Distance
                distance += (distanceTarget - distance) * zoomSpeed * deltaTime;

                
                             
            }

            //transform.rotation = rotation;
        }

        // Zoom input
        private float zoomAdd
        {
            get
            {
                float scrollAxis = Input.GetAxis("Mouse ScrollWheel");
                if (scrollAxis > 0) return -zoomSensitivity;
                if (scrollAxis < 0) return zoomSensitivity;
                return 0;
            }
        }

        // Clamping Euler angles
        private float ClampAngle(float angle, float min, float max)
        {
            if (angle < -360) angle += 360;
            if (angle > 360) angle -= 360;
            return Mathf.Clamp(angle, min, max);
        }

    }
}