using UnityEngine;
using UnityEngine.UI;

public class uGUICustomTooltipForAllMarkersExample2:MonoBehaviour
{
    public GameObject tooltipPrefab;
    public Canvas container;

    private void Start()
    {
        OnlineMapsMarkerBase.OnMarkerDrawTooltip = delegate { };
        OnlineMaps.instance.OnUpdateLate += OnUpdateLate;

        OnlineMapsControlBase.instance.OnMapClick += 
            () => OnlineMaps.instance.AddMarker(OnlineMapsControlBase.instance.GetCoords(), "Marker " + (OnlineMaps.instance.markers.Length + 1));
    }

    private void DestroyTooltip(OnlineMapsMarker marker)
    {
        Tooltip tooltip = marker.customData as Tooltip;
        if (tooltip == null) return;

        OnlineMapsUtils.DestroyImmediate(tooltip.gameObject);
        tooltip.gameObject = null;
        tooltip.textComponent = null;
        tooltip.transform = null;
        marker.customData = null;
    }

    private void OnUpdateLate()
    {
        foreach (OnlineMapsMarker marker in OnlineMaps.instance.markers)
        {
            if (string.IsNullOrEmpty(marker.label))
            {
                DestroyTooltip(marker);
                continue;
            }

            if (!marker.inMapView)
            {
                DestroyTooltip(marker);
                continue;
            }

            Vector2 screenPosition = OnlineMapsControlBase.instance.GetScreenPosition(marker.position);
            screenPosition.y += marker.height;

            Vector2 point;
            RectTransformUtility.ScreenPointToLocalPointInRectangle(container.transform as RectTransform, screenPosition, null, out point);

            Tooltip tooltip = marker.customData as Tooltip;
            if (tooltip == null)
            {
                GameObject tooltipGO = Instantiate(tooltipPrefab) as GameObject;
                tooltip = new Tooltip
                {
                    gameObject = tooltipGO,
                    transform = tooltipGO.transform as RectTransform,
                    textComponent = tooltipGO.GetComponentInChildren<Text>()
                };
                tooltip.transform.SetParent(container.transform);
                marker.customData = tooltip;
            }

            tooltip.transform.localPosition = point;
            tooltip.textComponent.text = marker.label;
        }
    }

    public class Tooltip
    {
        public GameObject gameObject;
        public RectTransform transform;
        public Text textComponent;
    }
}