using UnityEngine;
using UnityEngine.UI;

public class TestMapItem : MonoBehaviour
{
    public float Longitude { get; set; }
    public float Latitude { get; set; }
    private bool PositionToUpdate = false;


    public void Start()
    {
        OnlineMaps.instance.OnChangePosition += this.FlagUpdatePosition;
        OnlineMaps.instance.OnChangeZoom += this.FlagUpdatePosition;
        OnlineMaps.instance.OnMapUpdated += this.UpdatePosition;
        this.GetComponent<Button>().onClick.AddListener(this.HandleButtonClicked);
    }

    private void FlagUpdatePosition()
    {
        this.PositionToUpdate = true;
    }

    private void UpdatePosition()
    {
        if (this.PositionToUpdate)
        {
            float longitude = this.Longitude;
            float latitude = this.Latitude;
            // object is enabled only if it is visible
            this.gameObject.SetActive(OnlineMaps.instance.InMapView(longitude, latitude));
            // works for uGui controller; if you want to use tileset controller, you may use OnlineMapsControlBaseDynamicMesh.instance.GetWorldPosition
            this.gameObject.transform.position = OnlineMapsControlBase.instance.GetScreenPosition(longitude, latitude);
            this.PositionToUpdate = false;
        }
    }

    private void HandleButtonClicked()
    {
        // for test purpose
        Debug.Log("test click");
    }

    public void Destroy()
    {
        OnlineMaps.instance.OnChangePosition -= this.FlagUpdatePosition;
        OnlineMaps.instance.OnChangeZoom -= this.FlagUpdatePosition;
        OnlineMaps.instance.OnMapUpdated -= this.UpdatePosition;
        GameObject.Destroy(this.gameObject);
    }

    public void Activate(float longitude, float latitude)
    {
        this.Longitude = longitude;
        this.Latitude = latitude;
        this.PositionToUpdate = true;
        this.UpdatePosition();
    }

    public static TestMapItem Create(float longitude, float latitude, Transform root, GameObject prefab)
    {
        GameObject obj = Instantiate(prefab, root, false);
        TestMapItem result = obj.GetComponent<TestMapItem>();
        result.Activate(longitude, latitude);
        return result;
    }
}

public class TestMapItem : MonoBehaviour
{
    public float Longitude {get;set;}
    public float Latitude {get;set;}
        
    void Awake()
    {
        OnlineMaps.instance.OnChangePosition += UpdatePosition;
        OnlineMaps.instance.OnChangeZoom += UpdatePosition;
        this.GetComponent<Button>().onClick.AddListener(this.HandleButtonClicked);    
    }

    public void UpdatePosition()
    {
        // the object is disabled when not in the visible map
        this.gameObject.SetActive(OnlineMaps.instance.InMapView(Longitude, Latitude));
        // the following line works with uGui controller
        this.gameObject.transform.position = OnlineMapsControlBase.instance.GetScreenPosition(Longitude, Latitude);
        // if you want to use tileset controller, you may use OnlineMapsControlBaseDynamicMesh.instance.GetWorldPosition
    }
    public void HandleButtonClicked()
    {
        Debug.Log("test click");
    }

    public void Activate(float longitude, float latitude)
    {
        this.Longitude = longitude;
        this.Latitude = latitude;
        this.UpdatePosition();
    }

    // to instantiate the prefab i.e. pass it as the parameter; root is where the object is placed. i used the map transform
    // the script is attached to the prefab itself... but could be added with SetComponent instead.
    public static TestMapItem Create(float longitude, float latitude, Transform root, GameObject prefab)
    {
        GameObject obj = Instantiate(prefab, root, false);
        TestMapItem result = obj.GetComponent<TestMapItem>();
        result.Activate(longitude, latitude);
        return result;
    }
}

GameObject markerInstance = marker ["instance"] as GameObject;