using UnityEngine;
using Random = System.Random;

public class TooltipAlign:MonoBehaviour
{
    public Align align = Align.top;
    private GUIStyle tooltipStyle;
    private OnlineMapsTileSetControl control;
    private OnlineMaps map;

    private void Start()
    {
        map = OnlineMaps.instance;
        control = OnlineMapsTileSetControl.instance;

        map.showMarkerTooltip = OnlineMapsShowMarkerTooltip.always;

        tooltipStyle = new GUIStyle
        {
            normal =
            {
                background = map.tooltipBackgroundTexture,
                textColor = new Color32(230, 230, 230, 255)
            },
            border = new RectOffset(8, 8, 8, 8),
            margin = new RectOffset(4, 4, 4, 4),
            wordWrap = true,
            richText = true,
            alignment = TextAnchor.MiddleCenter,
            stretchWidth = true,
            padding = new RectOffset(0, 0, 3, 3)
        };
        OnlineMapsMarkerBase.OnMarkerDrawTooltip += OnMarkerDrawTooltip;

        double tlx, tly, brx, bry;
        map.GetCorners(out tlx, out tly, out brx, out bry);
        Random rnd = new Random();
        for (int i = 0; i < 20; i++)
        {
            double lng = rnd.NextDouble() * (brx - tlx) + tlx;
            double lat = rnd.NextDouble() * (tly - bry) + bry;
            map.AddMarker(lng, lat, i.ToString());
        }
    }

    private void OnMarkerDrawTooltip(OnlineMapsMarkerBase markerBase)
    {
        OnlineMapsMarker marker = markerBase as OnlineMapsMarker;
        if (marker == null) return;

        double tlx, tly, brx, bry;
        map.GetCorners(out tlx, out tly, out brx, out bry);

        double mx, my;
        marker.GetPosition(out mx, out my);

        Vector3 p1 = control.GetWorldPositionWithElevation(mx, my, tlx, tly, brx, bry);
        Vector3 p2 = p1 + new Vector3(0, 0, map.tilesetSize.y / map.tilesetHeight * marker.height * marker.scale);

        Vector2 screenPoint1 = control.activeCamera.WorldToScreenPoint(p1);
        Vector2 screenPoint2 = control.activeCamera.WorldToScreenPoint(p2);

        float yOffset = (screenPoint1.y - screenPoint2.y) * transform.localScale.x - 10;
        Vector3 position = screenPoint1 + new Vector2(0, yOffset);

        GUIContent tip = new GUIContent(marker.label);
        Vector2 size = tooltipStyle.CalcSize(tip);
        Rect rect = default(Rect);
        if (align == Align.top) rect = new Rect(position.x - size.x / 2 - 5, Screen.height - position.y - size.y - 20, size.x + 10, size.y + 5);
        else if (align == Align.bottom) rect = new Rect(position.x - size.x / 2 - 5, Screen.height - position.y + size.y - 10, size.x + 10, size.y + 5);
        else if (align == Align.left) rect = new Rect(position.x - size.x - 20, Screen.height - position.y - size.y / 2 - 5, size.x + 10, size.y + 5);
        else rect = new Rect(position.x + size.x, Screen.height - position.y - size.y / 2 - 5, size.x + 10, size.y + 5);

        GUI.Label(rect, marker.label, tooltipStyle);
    }

    public enum Align
    {
        top,
        left,
        right,
        bottom
    }
}