using UnityEngine;

namespace InfinityCode.OnlineMapsSupport
{
    public class SmoothCameraByCompass : MonoBehaviour
    {
        public OnlineMapsLocationService locationService;
        public OnlineMapsCameraOrbit cameraOrbit;
        public float duration = 1;
        public float compassThreshold = 4;
        
        private float progress = 1;
        private float fromHeading;
        private float toHeading;
        
        private void Start()
        {
            if (!locationService) locationService = OnlineMapsLocationService.instance;
            if (!cameraOrbit) cameraOrbit = OnlineMapsCameraOrbit.instance;

            locationService.compassThreshold = 0;
            locationService.OnCompassChanged += OnCompassChanged;
        }

        private void OnCompassChanged(float heading)
        {
            heading *= 360;
            if (Mathf.Abs(heading - toHeading) < compassThreshold) return;
            
            toHeading = heading;
            fromHeading = cameraOrbit.rotation.y;
            progress = 0;
        }

        private void Update()
        {
            if (progress >= 1) return;
            
            progress += Time.deltaTime / duration;
            cameraOrbit.rotation.y = Mathf.LerpAngle(fromHeading, toHeading, progress);
        }
    }
}