// OSRM car engine
// Doesn't yet support hints

OSRMEngine = function (vehicleName, baseURL, locale) {
  this.vehicleName = vehicleName;
  this.baseURL = baseURL;
  this.locale = locale;
  if (!locale)
    this.locale = "en";
};

OSRMEngine.prototype.createConfig = function () {
  var that = this;
  return {
    name: "javascripts.directions.engines.osrm_" + this.vehicleName.toLowerCase(),
    creditline: '<a href="http://project-osrm.org/" target="_blank">OSRM</a>',
    draggable: true,
    _hints: {},

    getRoute: function (isFinal, points) {
      var url = that.baseURL + "?z=14&output=json";
      for (var i = 0; i < points.length; i++) {
        var pair = points[i].join(',');
        url += "&loc=" + pair;
        if (this._hints[pair]) url += "&hint=" + this._hints[pair];
      }
      if (isFinal) url += "&instructions=true";
      this.requestCORS(url);
    },

    gotRoute: function (router, data) {
      if (data.status == 207) {
        return false;
      }
      // Draw polyline
      var line = L.PolylineUtil.decode(data.route_geometry);
      for (i = 0; i < line.length; i++) {
        line[i].lat /= 10;
        line[i].lng /= 10;
      }
      router.setPolyline(line);
      // Assemble instructions
      var steps = [];
      for (i = 0; i < data.route_instructions.length; i++) {
        var s = data.route_instructions[i];
        var linesegend;
        var instCodes = s[0].split('-');
        var instText = "<b>" + (i + 1) + ".</b> ";
        instText += TURN_INSTRUCTIONS[instCodes[0]];
        if (instCodes[1]) {
          instText += "exit " + instCodes[1] + " ";
        }
        if (instCodes[0] != 15) {
          instText += s[1] ? "<b>" + s[1] + "</b>" : I18n.t('javascripts.directions.instructions.unnamed');
        }
        if ((i + 1) < data.route_instructions.length) {
          linesegend = data.route_instructions[i + 1][3] + 1;
        } else {
          linesegend = s[3] + 1;
        }
        steps.push([line[s[3]], s[0].split('-')[0], instText, s[2], line.slice(s[3], linesegend)]);
      }
      if (steps.length) router.setItinerary({ steps: steps, distance: data.route_summary.total_distance, time: data.route_summary.total_time });
      return true;
    }
  };
};

OSM.RoutingEngines.add(false, new OSRMEngine("Car", "http://router.project-osrm.org/viaroute").createConfig());