package net.osmand.router;

import java.util.LinkedHashMap;
import java.util.Map;

import net.osmand.binary.BinaryMapDataObject;
import net.osmand.binary.BinaryMapIndexReader.TagValuePair;
import net.osmand.osm.MapRenderingTypes;
import net.osmand.router.BinaryRoutePlanner.RouteSegment;

public class CarRouter extends VehicleRouter {
		// no distinguish for speed in city/outside city (for now)
		private Map<String, Double> autoNotDefinedValues = new LinkedHashMap<String, Double>();
		private Map<String, Double> autoPriorityValues = new LinkedHashMap<String, Double>();
		{
			autoNotDefinedValues.put("motorway", 110d);
			autoNotDefinedValues.put("motorway_link", 80d);
			autoNotDefinedValues.put("trunk", 100d);
			autoNotDefinedValues.put("trunk_link", 80d);
			autoNotDefinedValues.put("primary", 65d);
			autoNotDefinedValues.put("primary_link", 45d);
			autoNotDefinedValues.put("secondary", 50d);
			autoNotDefinedValues.put("secondary_link", 40d);
			autoNotDefinedValues.put("tertiary", 35d);
			autoNotDefinedValues.put("tertiary_link", 30d);
			autoNotDefinedValues.put("residential", 30d);
			autoNotDefinedValues.put("road", 30d);
			autoNotDefinedValues.put("service", 20d);
			autoNotDefinedValues.put("unclassified", 20d);
			autoNotDefinedValues.put("track", 20d);
			autoNotDefinedValues.put("path", 20d);
			autoNotDefinedValues.put("living_street", 20d);
			
			autoPriorityValues.put("motorway", 1.5);
			autoPriorityValues.put("motorway_link", 1.0);
			autoPriorityValues.put("trunk", 1.5);
			autoPriorityValues.put("trunk_link", 1d);
			autoPriorityValues.put("primary", 1.3d);
			autoPriorityValues.put("primary_link", 1d);
			autoPriorityValues.put("secondary", 1.0d);
			autoPriorityValues.put("secondary_link", 1.0d);
			autoPriorityValues.put("tertiary", 1.0d);
			autoPriorityValues.put("tertiary_link", 1.0d);
			autoPriorityValues.put("residential", 0.8d);
			autoPriorityValues.put("service", 0.6d);
			autoPriorityValues.put("unclassified", 0.4d);
			autoPriorityValues.put("road", 0.4d);
			autoPriorityValues.put("track", 0.1d);
			autoPriorityValues.put("path", 0.1d);
			autoPriorityValues.put("living_street", 0.5d);
		}
		
		public boolean acceptLine(TagValuePair pair){
			if(pair.tag.equals("highway")){
				return autoNotDefinedValues.containsKey(pair.value);
			}
			return false;
		}
		
		public boolean acceptPoint(TagValuePair pair){
			if(pair.tag.equals("traffic_calming")){
				return true;
			} else if(pair.tag.equals("highway") && pair.value.equals("traffic_signals")){
				return true;
			} else if(pair.tag.equals("highway") && pair.value.equals("speed_camera")){
				return true;
			} else if(pair.tag.equals("railway") && pair.value.equals("crossing")){
				return true;
			} else if(pair.tag.equals("railway") && pair.value.equals("level_crossing")){
				return true;
			}
			return false;
		}
		
		public boolean isOneWay(int highwayAttributes){
			return MapRenderingTypes.isOneWayWay(highwayAttributes) || 
					MapRenderingTypes.isRoundabout(highwayAttributes);
		}

		/**
		 * return delay in seconds
		 */
		public double defineObstacle(BinaryMapDataObject road, int point) {
			if ((road.getTypes()[0] & 3) == MapRenderingTypes.POINT_TYPE) {
				// possibly not only first type needed ?
				TagValuePair pair = road.getTagValue(0);
				if (pair != null) {
					if(pair.tag.equals("highway") && pair.value.equals("traffic_signals")){
						return 20;
					} else if(pair.tag.equals("railway") && pair.value.equals("crossing")){
						return 25;
					} else if(pair.tag.equals("railway") && pair.value.equals("level_crossing")){
						return 25;
					}
				}
			}
			return 0;
		}
		
		/**
		 * return speed in m/s
		 */
		public double defineSpeed(BinaryMapDataObject road) {
			TagValuePair pair = road.getTagValue(0);
			double speed = MapRenderingTypes.getMaxSpeedIfDefined(road.getHighwayAttributes()) / 3.6d;
			boolean highway = "highway".equals(pair.tag);
			double priority = highway && autoPriorityValues.containsKey(pair.value) ? autoPriorityValues.get(pair.value) : 1d;
			if(speed == 0 && highway) {
				Double value = autoNotDefinedValues.get(pair.value);
				if(value == null){
					value = 50d;
				}
				speed =  value / 3.6d;
			}
			return speed * priority;
		}
		

		/**
		 * Used for A* routing to calculate g(x)
		 * @return minimal speed at road
		 */
		public double getMinDefaultSpeed() {
			return 9;
		}
		
		/**
		 * Used for A* routing to predict h(x) : it should be < (!) any g(x) 
		 * @return maximum speed to calculate shortest distance
		 */
		public double getMaxDefaultSpeed() {
			return 30;
		}


		public double calculateTurnTime(int middley, int middlex, int x, int y, RouteSegment segment, RouteSegment next, int j) {
			boolean lineAreNotConnected = j < segment.road.getPointsLength() - 1 || next.segmentStart != 0;
			if(lineAreNotConnected){
				return 25;
			} else {
				if (next.road.getPointsLength() > 1) {
					double a1 = Math.atan2(y - middley, x - middlex);
					double a2 = Math.atan2(y - next.road.getPoint31YTile(1), x - next.road.getPoint31XTile(1));
					double diff = Math.abs(a1 - a2);
					if (diff > Math.PI / 2 && diff < 3 * Math.PI / 2) {
						return 25;
					}
				}
			}
			return 0;
		}
		
	}