/*
 * Copyright 2010 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.android.apps.mytracks;

import com.google.android.apps.mytracks.content.Waypoint;
import com.google.android.maps.MapView;

import android.graphics.Canvas;
import android.location.Location;
import android.test.AndroidTestCase;

/**
 * Tests for the MyTracks map overlay.
 * 
 * @author Bartlomiej Niechwiej
 * @author Vangelis S.
 */
public class MapOverlayTest extends AndroidTestCase {
  private Canvas canvas;
  private MockMyTracksOverlay myTracksOverlay;
  private MapView mockView;

  @Override
  protected void setUp() throws Exception {
    super.setUp();
    canvas = new Canvas();
    myTracksOverlay = new MockMyTracksOverlay(getContext());
    // Enable drawing.
    myTracksOverlay.setTrackDrawingEnabled(true);
    mockView = null;
  }
  
  public void testAddLocation() throws Exception {
    Location location = new Location("gps");
    location.setLatitude(10);
    location.setLongitude(20);
    myTracksOverlay.addLocation(location);
    assertEquals(1, myTracksOverlay.getNumLocations());
    assertEquals(0, myTracksOverlay.getNumWaypoints());
    
    location.setLatitude(20);
    location.setLongitude(30);
    myTracksOverlay.addLocation(location);
    assertEquals(2, myTracksOverlay.getNumLocations());
    assertEquals(0, myTracksOverlay.getNumWaypoints());
    assertNull(myTracksOverlay.getLastPath());
    
    // Draw and make sure that we don't lose any point.
    myTracksOverlay.draw(canvas, mockView, false);
    assertEquals(2, myTracksOverlay.getNumLocations());
    assertEquals(0, myTracksOverlay.getNumWaypoints());
    assertNotNull(myTracksOverlay.getLastPath());
    
    myTracksOverlay.draw(canvas, mockView, true);
    assertEquals(2, myTracksOverlay.getNumLocations());
    assertEquals(0, myTracksOverlay.getNumWaypoints());
    assertNotNull(myTracksOverlay.getLastPath());
  }
  
  public void testClearPoints() throws Exception {
    Location location = new Location("gps");
    location.setLatitude(10);
    location.setLongitude(20);
    myTracksOverlay.addLocation(location);
    assertEquals(1, myTracksOverlay.getNumLocations());
    myTracksOverlay.clearPoints();
    assertEquals(0, myTracksOverlay.getNumLocations());

    // Same after drawing on canvas.
    final int locations = 100;
    for (int i = 0; i < locations; ++i) {
      myTracksOverlay.addLocation(location);
    }
    assertEquals(locations, myTracksOverlay.getNumLocations());
    myTracksOverlay.draw(canvas, mockView, false);
    myTracksOverlay.draw(canvas, mockView, true);
    myTracksOverlay.clearPoints();
    assertEquals(0, myTracksOverlay.getNumLocations());
  }

  public void testAddWaypoint() throws Exception {
    Location location = new Location("gps");
    location.setLatitude(10);
    location.setLongitude(20);
    Waypoint waypoint = new Waypoint();
    waypoint.setLocation(location);
    myTracksOverlay.addWaypoint(waypoint);
    assertEquals(1, myTracksOverlay.getNumWaypoints());
    assertEquals(0, myTracksOverlay.getNumLocations());
    assertNull(myTracksOverlay.getLastPath());
    
    final int waypoints = 10;
    for (int i = 0; i < waypoints; ++i) {
      waypoint = new Waypoint();
      waypoint.setLocation(location);
      myTracksOverlay.addWaypoint(waypoint);
    }
    assertEquals(1 + waypoints, myTracksOverlay.getNumWaypoints());
    assertEquals(0, myTracksOverlay.getNumLocations());
    assertNull(myTracksOverlay.getLastPath());
  }

  public void testClearWaypoints() throws Exception {
    Location location = new Location("gps");
    location.setLatitude(10);
    location.setLongitude(20);
    Waypoint waypoint = new Waypoint();
    waypoint.setLocation(location);
    myTracksOverlay.addWaypoint(waypoint);
    assertEquals(1, myTracksOverlay.getNumWaypoints());
    myTracksOverlay.clearWaypoints();
    assertEquals(0, myTracksOverlay.getNumWaypoints());
  }
  
  public void testDrawing() {
    Location location = new Location("gps");
    location.setLatitude(10);
    for (int i = 0; i < 40; ++i) {
      location.setLongitude(20 + i);
      Waypoint waypoint = new Waypoint();
      waypoint.setLocation(location);
      myTracksOverlay.addWaypoint(waypoint);
    }
    for (int i = 0; i < 100; ++i) {
      location = new Location("gps");
      location.setLatitude(20 + i / 2);
      location.setLongitude(150 - i);
      myTracksOverlay.addLocation(location);
    }
    
    // Shadow.
    myTracksOverlay.draw(canvas, mockView, true);
    // We don't expect to do anything if  
    assertNull(myTracksOverlay.getLastPath());
    assertEquals(40, myTracksOverlay.getNumWaypoints());
    assertEquals(100, myTracksOverlay.getNumLocations());

    // No shadow.
    myTracksOverlay.draw(canvas, mockView, false);
    assertNotNull(myTracksOverlay.getLastPath());
    assertEquals(40, myTracksOverlay.getNumWaypoints());
    assertEquals(100, myTracksOverlay.getNumLocations());
    // TODO: Check the points from the path (and the segments).
  }
}