package dk.daoas.adressevedligehold.afstandandenrute;

import java.util.Collection;
import java.util.logging.Level;
import java.util.logging.Logger;

import com.google.gson.Gson;

import dk.daoas.adressevedligehold.ServiceConfig;
import dk.daoas.adressevedligehold.beans.Address;
import dk.daoas.adressevedligehold.util.HttpUtil;


public class OSRMHelper {


	final static Logger logger = Logger.getLogger( OSRMHelper.class.toString() );

	
	Gson gson = new Gson();

	final int port = 5000;
	final String base_url = "http://" + ServiceConfig.getInstance().osrmHost + ":" + port;


	public Address getNearestTableHttp(Address a1, Collection<Address> haystack) throws Exception {


		Address bedsteAddress = null;

		Address hayArray[] = new Address[ haystack.size() ];
		haystack.toArray(hayArray);

		StringBuilder sb = new StringBuilder();
		sb.append(base_url);
		sb.append("/table?src=").append(a1.latitude).append(",").append(a1.longitude);

		for(int i = 0; i<hayArray.length; i++) {
			Address a = hayArray[i];
			sb.append("&dst=").append( a.latitude ).append(",").append(a.longitude);
		}

		try {

			String txtResponse = HttpUtil.getContentString(sb.toString(), 750, "UTF-8");

			OSRMDistanceTable table = gson.fromJson(txtResponse, OSRMDistanceTable.class);

			if (table.status != 200) {
				logger.info("OSRM failed with message: " + table.status + " / "+ table.status_message);
				return null;
			}

			if ( table.distance_table[0].length != hayArray.length  ) {
				logger.log(Level.SEVERE, "Wrong number of results in matrix " + table.distance_table[0].length);

				System.out.println("--------------");
				System.out.println("URL:");
				System.out.println(sb.toString());
				System.out.println("--------------");
				System.out.println("Response:");
				System.out.println(txtResponse);


				throw new Exception("Wrong number of results in matrix");
			}

			int bedsteTid = Integer.MAX_VALUE;

			for (int i = 0; i<table.distance_table[0].length; i++) {
				if (table.distance_table[0][i] < bedsteTid) {
					bedsteTid = table.distance_table[0][i];
					bedsteAddress = hayArray[i];
				}
			}


		} catch (Exception e) {
			logger.log(Level.SEVERE, "Lookup failed", e);
			System.out.println( sb.toString() );
			System.out.println( a1 );
			throw e; //Re-throw
		}

		//return gson.fromJson(txtResponse, OSRMResponse.class);



		return bedsteAddress;
	}

}