/*     INFINITY CODE 2013-2016      */
/*   http://www.infinity-code.com   */

using UnityEngine;

namespace InfinityCode.OnlineMapsExamples
{
	[AddComponentMenu("Infinity Code/Online Maps/Examples (API Usage)/SmoothMoveExample")]
	public class SmoothMove : MonoBehaviour
	{
		/// <summary>
		/// Move duration (sec)
		/// </summary>
		public float time = 3;

		/// <summary>
		/// Relative position (0-1) between from and to
		/// </summary>
		private float angle;

		/// <summary>
		/// Movement trigger
		/// </summary>
		private bool isMovement;

		private Vector2 fromPosition;
		private Vector2 toPosition;

		private void Start(){
			// from current map position
			fromPosition = OnlineMaps.instance.position;

			// to GPS position;
			toPosition = OnlineMaps.instance.GetComponent<OnlineMapsLocationService>().position;

			// calculates tile positions
			Vector2 fromTile = OnlineMapsUtils.LatLongToTilef(fromPosition, OnlineMaps.instance.zoom);
			Vector2 toTile = OnlineMapsUtils.LatLongToTilef(toPosition, OnlineMaps.instance.zoom);

			// if tile offset < 4, then start smooth movement
			if ((fromTile - toTile).magnitude < 4)
			{
				// set relative position 0
				angle = 0;

				// start movement
				isMovement = true;
			}
			else // too far
			{
				OnlineMaps.instance.position = toPosition;
			}
		}

		private void Update()
		{
			

			// if not movement then return
			if (!isMovement) return;

			// update relative position
			angle += Time.deltaTime / time;

			if (angle > 1)
			{
				// stop movement
				isMovement = false;
				angle = 1;
			}

			// Set new position
			OnlineMaps.instance.position = Vector2.Lerp(fromPosition, toPosition, angle);
		}
	}
}