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

#if NGUI

using System;
using System.Collections.Generic;
using UnityEngine;
using System.Collections;

namespace InfinityCode.OnlineMapsExamples
{
    [AddComponentMenu("Infinity Code/Online Maps/Examples (API Usage)/NGUICustomMarkerSystemExample")]
    public class NGUICustomMarkerSystemExample : MonoBehaviour
    {
        private static List<NGUICustomMarkerExample> _markers;

        private static NGUICustomMarkerSystemExample instance; 

        public Transform container;
        public GameObject prefab;

        public static List<NGUICustomMarkerExample> markers
        {
            get
            {
                if (_markers == null) _markers = new List<NGUICustomMarkerExample>();
                return _markers;
            }
        }

        public static NGUICustomMarkerExample AddMarker(Vector2 position)
        {
            GameObject go = Instantiate(instance.prefab) as GameObject;
            go.transform.parent = instance.container;
            go.transform.localScale = Vector3.one;
            NGUICustomMarkerExample marker = go.GetComponent<NGUICustomMarkerExample>();
            marker.position = position;
            markers.Add(marker);
            return marker;
        }

        private void OnEnable()
        {
            instance = this;
        }

        private void Start()
        {
            Vector2 position = new Vector2(-122.67f, 45.52f);
            AddMarker(position);

            OnlineMaps.instance.OnMapUpdated += OnMapUpdated;
            OnlineMaps.instance.position = position;
            OnMapUpdated();
        }

        private void OnMapUpdated()
        {
            Vector2 tl = OnlineMaps.instance.topLeftPosition;
            Vector2 br = OnlineMaps.instance.bottomRightPosition;

            Rect rect = new Rect(tl.x, br.y, br.x - tl.x, tl.y - br.y);
            if (rect.width < 0) rect.width += 360;

            foreach (NGUICustomMarkerExample marker in markers)
            {
                Vector2 p = marker.position;
                GameObject go = marker.gameObject;

                if (!rect.Contains(p))
                {
                    if (!rect.Contains(p + new Vector2(360, 0)))
                    {
                        if (go.activeSelf) go.SetActive(false);
                        continue;
                    }
                }

                if (!go.activeSelf) go.SetActive(true);

                Vector2 screenPosition = OnlineMapsControlBase.instance.GetScreenPosition(p);
                screenPosition.x -= Screen.width / 2;
                screenPosition.y -= Screen.height / 2;
                Vector2 buttonOffset = new Vector2(-marker.size.x / 2, 0);
                marker.widget.SetRect(screenPosition.x + buttonOffset.x, screenPosition.y + buttonOffset.y, marker.size.x, marker.size.y);
            }
        }
    }
}

#endif