package dk.daoas.fulddaekning.osrm;

import java.io.IOException;
import java.util.Collection;
import java.util.Iterator;

import com.google.gson.Gson;

import dk.daoas.fulddaekning.Adresse;
import dk.daoas.fulddaekning.HttpUtil;

public class OSRMHelper {
	
	Gson gson = new Gson();
	
	final String base_url = "http://10.30.2.61:5000";

	public Adresse getNearestViaTable(Adresse a1, Collection<Adresse> haystack) {
		
		Adresse bedsteAdresse = null;
		
		Adresse hayArray[] = new Adresse[ haystack.size() ];
		haystack.toArray(hayArray);
		
		StringBuilder sb = new StringBuilder();
		sb.append(base_url);
		sb.append("/table?loc=").append(a1.latitude).append(",").append(a1.longitude);
		
		for(int i = 0; i<hayArray.length; i++) {
			Adresse a = hayArray[i];
			sb.append("&loc=").append( a.latitude ).append(",").append(a.longitude);
		}
		
		try {
			String txtResponse = HttpUtil.getContentString(sb.toString(), 500, "UTF-8");
			OSRMDistanceTable table = gson.fromJson(txtResponse, OSRMDistanceTable.class);
			int bedsteTid = Integer.MAX_VALUE;
			
			for (int i = 1; i<table.distance_table.length; i++) {
				if (table.distance_table[0][i] < bedsteTid) {
					bedsteTid = table.distance_table[0][i];
					int idx = i-1;
					bedsteAdresse = hayArray[idx];
				}
			}

		} catch (Exception e) {
			System.out.println( e.getMessage() );
			System.exit(1);			
		}
		
		//return gson.fromJson(txtResponse, OSRMResponse.class);
		
		
		return bedsteAdresse;
	}
	
	/*
	 * Denne virker men table opslaget er 10 gange hurtigere
	 * 
	 */
	@Deprecated
	public Adresse getNearest(Adresse a1, Collection<Adresse> haystack) {
		int bedsteAfstand = 9999999;
		Adresse bedsteAdresse = null;
		
		Iterator<Adresse> it = haystack.iterator();
		while (it.hasNext()) {
			Adresse a2 = it.next();
			
			try {
				OSRMResponse res = getRoute(a1, a2);
				
				
				if (res.route_summary.total_distance < bedsteAfstand) {
					bedsteAfstand = res.route_summary.total_distance;
					bedsteAdresse = a2;
				}
			} catch (IOException e) {
				System.out.println( e.getMessage() );
				System.exit(1);
			}
	
		}
		
		return bedsteAdresse;
	}
	
	public OSRMResponse getRoute(Adresse a1, Adresse a2) throws IOException {
		
		String loc1 = a1.latitude + "," + a1.longitude;
		String loc2 = a2.latitude + "," + a2.longitude;
		
		String params = "loc=" + loc1 + "&loc=" + loc2 + "&geometry=false&instructions=false&alt=false";
		
		String url = base_url + "/viaroute?" + params;
		
		String txtResponse = HttpUtil.getContentString(url, 500, "UTF-8");
		
		return gson.fromJson(txtResponse, OSRMResponse.class);
	}
}