package com.evsuite.abrp;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import org.junit.Test;

/** The Grid map's tile arithmetic and the server's road tiles — pure JVM. */
public class MapGeometryTest {

    @Test
    public void tilesMatchTheServer() {
        // Alexanderplatz, Berlin: the tile the server tests use too.
        assertEquals(8802, MapGeometry.tileX(13.4125));
        assertEquals(5373, MapGeometry.tileY(52.5219));
        long key = MapGeometry.key(8802, 5373);
        assertEquals(8802, MapGeometry.keyX(key));
        assertEquals(5373, MapGeometry.keyY(key));
    }

    @Test
    public void metresPerUnitShrinkTowardsThePoles() {
        // A zoom-14 tile is about 2.4 km across at the equator, in 4096 units.
        assertEquals(0.597, MapGeometry.metresPerUnit(0), 0.001);
        assertEquals(0.363, MapGeometry.metresPerUnit(52.52), 0.001);
    }

    @Test
    public void unusablePositions() {
        assertFalse(MapGeometry.usable(Double.NaN, 13));
        assertFalse(MapGeometry.usable(0, 0)); // a GPS that has nothing yet
        assertFalse(MapGeometry.usable(89, 13));
        assertTrue(MapGeometry.usable(52.52, 13.41));
    }

    @Test
    public void roadTilesParse() {
        RoadTile t = RoadTile.parse("{\"z\":14,\"x\":8802,\"y\":5373,\"extent\":4096,\"ways\":["
                + "{\"c\":1,\"p\":[-115,1236,82,1080,100,1000]},{\"c\":3,\"p\":[0,0,10,10]}]}", 8802, 5373);
        assertNotNull(t);
        assertEquals(2, t.classes.length);
        assertEquals(1, t.classes[0]);
        assertEquals(6, t.points[0].length);
        assertEquals(-115, t.bounds[0][0]);
        assertEquals(1000, t.bounds[0][1]);
        assertEquals(100, t.bounds[0][2]);
        assertEquals(1236, t.bounds[0][3]);
    }

    @Test
    public void badRoadTilesAreNoTile() {
        String head = "{\"z\":14,\"x\":1,\"y\":2,\"extent\":4096,\"ways\":";
        assertNotNull(RoadTile.parse(head + "[]}", 1, 2));
        assertNull("another tile", RoadTile.parse(head + "[]}", 1, 3));
        assertNull("another zoom", RoadTile.parse("{\"z\":13,\"x\":1,\"y\":2,\"extent\":4096,\"ways\":[]}", 1, 2));
        assertNull("unknown class", RoadTile.parse(head + "[{\"c\":7,\"p\":[0,0,1,1]}]}", 1, 2));
        assertNull("one point", RoadTile.parse(head + "[{\"c\":1,\"p\":[0,0]}]}", 1, 2));
        assertNull("odd count", RoadTile.parse(head + "[{\"c\":1,\"p\":[0,0,1]}]}", 1, 2));
        assertNull("far outside", RoadTile.parse(head + "[{\"c\":1,\"p\":[0,0,99999,1]}]}", 1, 2));
        assertNull("not JSON", RoadTile.parse("<html>", 1, 2));
    }
}