// stores information of the routes the user has looked up for the session
var nb = nextBusser();

$(function() {
  var charts = [];

  $("#RouteSelector").change(function(){
    var routeTag = $("#RouteSelector").val();

      // if the route hasn't been looked up before, look it up and store it in routesInfo
    if(nb.routesInfo[routeTag] && typeof nb.routesInfo[routeTag].stopsInfo === 'undefined') {
      nb.getNextbus({command: 'routeConfig', a:'sf-muni', r: routeTag}, function(xml) {
        _.extend(nb.routesInfo[routeTag], nb.parseXMLstops(xml));
        displayDirections(nb.routesInfo[routeTag].stopsInfo, nb.routesInfo[routeTag].directions);
      });
    } else {
      displayDirections(nb.routesInfo[routeTag].stopsInfo, nb.routesInfo[routeTag].directions);
    }
  });

  $("#DirectionSelector").change(function(){
    var route = nb.routesInfo[$("#RouteSelector").val()];
    displayStops(route.stopsInfo, route.directions, $("#DirectionSelector").val());
  });

  $("#StopSelector").change(function(){
    var route = nb.routesInfo[$("#RouteSelector").val()];
    var stopTag = $("#StopSelector").val();
    displayDestinations(route.stopsInfo, route.directions, $("#DirectionSelector").val(), stopTag);
  });

  $("#AddRouteButton").click(function(){
    var routeTag = $("#RouteSelector").val();
    var stopTag = $("#StopSelector").val();
    if(charts[0]) {
      updateChart(stopTag, routeTag, charts[0]);
      updateChartView(charts[0]);
    } else {
      charts.push(makeChart(stopTag, routeTag));
      makeChartView(charts[0]);
    }
  });

    // list pulled from: http://webservices.nextbus.com/service/publicXMLFeed?command=routeList&a=sf-muni
  var routesToInsert = [
    ["F", "F-Market & Wharves"],
    ["J", "J-Church"],
    ["KT", "KT-Ingleside/Third Street"],
    ["L", "L-Taraval"],
    ["M", "M-Ocean View"],
    ["N", "N-Judah"],
    ["NX", "NX-N Express"],
    ["1", "1-California"],
    ["1AX", "1AX-California A Express"],
    ["1BX", "1BX-California B Express"],
    ["2", "2-Clement"],
    ["3", "3-Jackson"],
    ["5", "5-Fulton"],
    ["6", "6-Parnassus"],
    ["8X", "8X-Bayshore Express"],
    ["8AX", "8AX-Bayshore A Express"],
    ["8BX", "8BX-Bayshore B Express"],
    ["9", "9-San Bruno"],
    ["9L", "9L-San Bruno Limited"],
    ["10", "10-Townsend"],
    ["12", "12-Folsom/Pacific"],
    ["14", "14-Mission"],
    ["14L", "14L-Mission Limited"],
    ["14X", "14X-Mission Express"],
    ["16X", "16X-Noriega Express"],
    ["17", "17-Parkmerced"],
    ["18", "18-46th Avenue"],
    ["19", "19-Polk"],
    ["21", "21-Hayes"],
    ["22", "22-Fillmore"],
    ["23", "23-Monterey"],
    ["24", "24-Divisadero"],
    ["27", "27-Bryant"],
    ["28", "28-19th Avenue"],
    ["28L", "28L-19th Avenue Limited"],
    ["29", "29-Sunset"],
    ["30", "30-Stockton"],
    ["30X", "30X-Marina Express"],
    ["31", "31-Balboa"],
    ["31AX", "31AX-Balboa A Express"],
    ["31BX", "31BX-Balboa B Express"],
    ["33", "33-Stanyan"],
    ["35", "35-Eureka"],
    ["36", "36-Teresita"],
    ["37", "37-Corbett"],
    ["38", "38-Geary"],
    ["38AX", "38AX-Geary A Express"],
    ["38BX", "38BX-Geary B Express"],
    ["38L", "38L-Geary Limited"],
    ["39", "39-Coit"],
    ["41", "41-Union"],
    ["43", "43-Masonic"],
    ["44", "44-O'Shaughnessy"],
    ["45", "45-Union/Stockton"],
    ["47", "47-Van Ness"],
    ["48", "48-Quintara/24th Street"],
    ["49", "49-Mission/Van Ness"],
    ["52", "52-Excelsior"],
    ["54", "54-Felton"],
    ["56", "56-Rutland"],
    ["66", "66-Quintara"],
    ["67", "67-Bernal Heights"],
    ["71", "71-Haight/Noriega"],
    ["71L", "71L-Haight/Noriega Limited"],
    ["76X", "76X-Marin Headlands Express"],
    ["81X", "81X-Caltrain Express"],
    ["82X", "82X-Levi Plaza Express"],
    ["83X", "83X-Caltrain"],
    ["88", "88-Bart Shuttle"],
    ["90", "90-San Bruno Owl"],
    ["91", "91-Owl"],
    ["108", "108-Treasure Island"],
    ["K OWL", "K-Owl"],
    ["L OWL", "L-Owl"],
    ["M OWL", "M-Owl"],
    ["N OWL", "N-Owl"],
    ["T OWL", "T-Owl"],
    ["59", "Powell/Mason Cable Car"],
    ["60", "Powell/Hyde Cable Car"],
    ["61", "California Cable Car"]];

    // insert the routes into the drop down and also create a lookup hash
  _(routesToInsert).each(function(route){
    $("#RouteSelector").append('<option value="'+ route[0] +'">'+ route[1] +'</option>');
    nb.routesInfo[route[0]] = {};
    nb.routesInfo[route[0]].title = route[1];
  });

  var recursiveAsyncGoodness = function(queries, indx) {
    indx = indx || 0;
    if(queries && queries.length > 0) {
      if(indx < queries.length) {
        var stopTag = queries[indx].s,
            routeTag = queries[indx].r;

        nb.getNextbus({command: 'routeConfig', a:'sf-muni', r: routeTag}, function(xml) {
          nb.routesInfo[routeTag] = nb.parseXMLstops(xml);
          (indx===0) ? charts.push(makeChart(stopTag, routeTag)) : updateChart(stopTag, routeTag, charts[0]);
          recursiveAsyncGoodness(queries, indx+1);
        });
      } else {

        makeChartView(charts[0]);
        updateFormView(queries[0].s, queries[0].r);
      }
    }
  };

  var params = window.location.search;
  if(params.length>0) {
    var queries = deserialiseParams(params.substr(1));
    recursiveAsyncGoodness(queries);
  }

});


// deparam - thanks Ben Alman!
// https://gist.github.com/cowboy/1025817
(function($) {
  // Creating an internal undef value is safer than using undefined, in case it
  // was ever overwritten.
  var undef;
  // A handy reference.
  var decode = decodeURIComponent;

  // Document $.deparam.
  var deparam = $.deparam = function(text, reviver) {
    // The object to be returned.
    var result = {};
    // Iterate over all key=value pairs.
    $.each(text.replace(/\+/g, ' ').split('&'), function(index, pair) {
      // The key=value pair.
      var kv = pair.split('=');
      // The key, URI-decoded.
      var key = decode(kv[0]);
      // Abort if there's no key.
      if ( !key ) { return; }
      // The value, URI-decoded. If value is missing, use empty string.
      var value = decode(kv[1] || '');
      // If key is more complex than 'foo', like 'a[]' or 'a[b][c]', split it
      // into its component parts.
      var keys = key.split('][');
      var last = keys.length - 1;
      // Used when key is complex.
      var i = 0;
      var current = result;

      // If the first keys part contains [ and the last ends with ], then []
      // are correctly balanced.
      if ( keys[0].indexOf('[') >= 0 && /\]$/.test(keys[last]) ) {
        // Remove the trailing ] from the last keys part.
        keys[last] = keys[last].replace(/\]$/, '');
        // Split first keys part into two parts on the [ and add them back onto
        // the beginning of the keys array.
        keys = keys.shift().split('[').concat(keys);
        // Since a key part was added, increment last.
        last++;
      } else {
        // Basic 'foo' style key.
        last = 0;
      }

      if ( $.isFunction(reviver) ) {
        // If a reviver function was passed, use that function.
        value = reviver(key, value);
      } else if ( reviver ) {
        // If true was passed, use the built-in $.deparam.reviver function.
        value = deparam.reviver(key, value);
      }

      if ( last ) {
        // Complex key, like 'a[]' or 'a[b][c]'. At this point, the keys array
        // might look like ['a', ''] (array) or ['a', 'b', 'c'] (object).
        for ( ; i <= last; i++ ) {
          // If the current key part was specified, use that value as the array
          // index or object key. If omitted, assume an array and use the
          // array's length (effectively an array push).
          key = keys[i] !== '' ? keys[i] : current.length;
          if ( i < last ) {
            // If not the last key part, update the reference to the current
            // object/array, creating it if it doesn't already exist AND there's
            // a next key. If the next key is non-numeric and not empty string,
            // create an object, otherwise create an array.
            current = current[key] = current[key] || (isNaN(keys[i + 1]) ? {} : []);
          } else {
            // If the last key part, set the value.
            current[key] = value;
          }
        }
      } else {
        // Simple key.
        if ( $.isArray(result[key]) ) {
          // If the key already exists, and is an array, push the new value onto
          // the array.
          result[key].push(value);
        } else if ( key in result ) {
          // If the key already exists, and is NOT an array, turn it into an
          // array, pushing the new value onto it.
          result[key] = [result[key], value];
        } else {
          // Otherwise, just set the value.
          result[key] = value;
        }
      }
    });

    return result;
  };

  // Default reviver function, used when true is passed as the second argument
  // to $.deparam. Don't like it? Pass your own!
  deparam.reviver = function(key, value) {
    var specials = {
      'true': true,
      'false': false,
      'null': null,
      'undefined': undef
    };

    return (+value + '') === value ? +value // Number
      : value in specials ? specials[value] // true, false, null, undefined
      : value; // String
  };

}(jQuery));