using Unity.Cinemachine;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.Serialization;

namespace BrewMonster
{
    public class CameraController : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IDragHandler
    {
        public static CameraController Instance;
        [SerializeField] private CinemachineCamera _cinemachineCamera;
        [SerializeField] private CinemachineOrbitalFollow orbital;
        private bool fingerDown = false;
        [SerializeField, Min(0f)] private float dragDeadZone = 10f;
        [SerializeField] private float horizontalRotationPerScreen = 60f;
        [SerializeField] private float verticalRotationPerScreen = 500f;
        [SerializeField, HideInInspector] private bool _migratedDeadZoneToNormalized;

        public CinemachineOrbitalFollow Orbital { get => orbital;}

        void OnEnable()
        {
            Instance = this;
            MigrateLegacyDeadZone();
        }

        public void OnDrag(PointerEventData eventData)
        {
            if (!fingerDown || orbital == null)
            {
                return;
            }

            float screenReference = Mathf.Max(1f, Mathf.Min(Screen.width, Screen.height));
            Vector2 normalizedDelta = eventData.delta / screenReference;
            float normalizedDeadZone = Mathf.Max(0.0001f, dragDeadZone);

            if (normalizedDelta.sqrMagnitude >= normalizedDeadZone * normalizedDeadZone)
            {
                orbital.HorizontalAxis.Value += normalizedDelta.x * horizontalRotationPerScreen;
                //orbital.HorizontalAxis.Value = Mathf.Clamp(orbital.HorizontalAxis.Value, -360f, 360f);
                orbital.VerticalAxis.Value -= normalizedDelta.y * verticalRotationPerScreen;
                orbital.VerticalAxis.Value = Mathf.Clamp(orbital.VerticalAxis.Value, -360f, 360f);
            }
        }

        public void OnPointerDown(PointerEventData eventData)
        {
            fingerDown = true;
        }

        public void OnPointerUp(PointerEventData eventData)
        {
            fingerDown = false;
        }

        private void OnValidate()
        {
            MigrateLegacyDeadZone();
        }

        private void MigrateLegacyDeadZone()
        {
            if (_migratedDeadZoneToNormalized)
            {
                return;
            }

            // Older values were serialized in pixels; convert once to normalized short-side ratio.
            if (dragDeadZone > 0.05f)
            {
                dragDeadZone /= 1080f;
            }

            dragDeadZone = Mathf.Max(0.0001f, dragDeadZone);

            _migratedDeadZoneToNormalized = true;
        }

        private void Update()
        {
            //todo: should not always update
            if (_cinemachineCamera.Follow == null && CECGameRun.Instance.GetHostPlayer() != null)
            {
                if(CECGameRun.Instance.GetHostPlayer().PointCam != null)
                {
                    _cinemachineCamera.Follow = CECGameRun.Instance.GetHostPlayer().PointCam;
                    _cinemachineCamera.ForceCameraPosition(CECGameRun.Instance.GetHostPlayer().PointCam.position, Quaternion.identity);
                    orbital.HorizontalAxis.Value = 208;
                    orbital.VerticalAxis.Value = -268;
                }
                else
                {
                    _cinemachineCamera.Follow = CECGameRun.Instance.GetHostPlayer().transform;
                    _cinemachineCamera.ForceCameraPosition(CECGameRun.Instance.GetHostPlayer().ObjectPosition, Quaternion.identity);
                    orbital.HorizontalAxis.Value = 208;
                    orbital.VerticalAxis.Value = -268;
                }
            }
        }
        public void UpdateFollowObject(Transform followObject)
        {
            _cinemachineCamera.Follow = followObject;
            _cinemachineCamera.ForceCameraPosition(followObject.position, Quaternion.identity);
            orbital.HorizontalAxis.Value = 208;
            orbital.VerticalAxis.Value = -268;
        }
    }
}