using InfinityCode.RealWorldTerrain;
using UnityEditor;
using UnityEngine;

public class PixelPositionHelper: EditorWindow
{
    private double itlx;
    private double itly;
    private double ibrx;
    private double ibry;
    private int width;
    private int height;
    private RealWorldTerrainItem item;
    private double px1;
    private double py1;
    private double px2;
    private double py2;

    [MenuItem("Window/Pixel position helper")]
    public static void OpenWindow()
    {
        GetWindow<PixelPositionHelper>(true, "Pixel position helper");
    }

    private void OnGUI()
    {
        EditorGUILayout.LabelField("Image");
        itlx = EditorGUILayout.DoubleField("Left Longitude", itlx);
        itly = EditorGUILayout.DoubleField("Top Latitude", itly);
        ibrx = EditorGUILayout.DoubleField("Right Longitude", ibrx);
        ibry = EditorGUILayout.DoubleField("Bottom Latitude", ibry);
        width = EditorGUILayout.IntField("Width", width);
        height = EditorGUILayout.IntField("Height", height);

        item = EditorGUILayout.ObjectField("Terrain", item, typeof(RealWorldTerrainItem), true) as RealWorldTerrainItem;

        if (GUILayout.Button("Calc"))
        {
            Calc();
        }

        EditorGUILayout.LabelField("Start pixel X: " + px1);
        EditorGUILayout.LabelField("Start pixel Y: " + py1);
        EditorGUILayout.LabelField("End pixel X: " + px2);
        EditorGUILayout.LabelField("End pixel Y: " + py2);
    }

    private void Calc()
    {
        if (item == null) return;

        double mtlx, mtly, mbrx, mbry;
        RealWorldTerrainUtils.LatLongToMercat(itlx, itly, out mtlx, out mtly);
        RealWorldTerrainUtils.LatLongToMercat(ibrx, ibry, out mbrx, out mbry);

        double rx = mbrx - mtlx;
        double ry = mbry - mtly;

        px1 = (item.leftMercator - mtlx) / rx * width;
        py1 = (item.topMercator - mtly) / ry * height;

        px2 = (item.rightMercator - mtlx) / rx * width;
        py2 = (item.bottomMercator - mtly) / ry * height;
    }
}