(function() {
  var DAYS, LAT, LONG, MONTHS, altitude, get_day_night, get_season, last_day_night, last_seconds, last_sep, pad_time, update_05_secs, update_10_min;

  LAT = 43.62;

  LONG = 10.63;

  DAYS = ['Dom', 'Lun', 'Mar', 'Mer', 'Gio', 'Ven', 'Sab'];

  MONTHS = ['Gen', 'Feb', 'Mar', 'Apr', 'Mag', 'Giu', 'Lug', 'Ago', 'Set', 'Ott', 'Nov', 'Dic'];

  /* add a zero in front of numbers < 10
  */

  pad_time = function(i) {
    if (i < 10) {
      return "0" + i;
    } else {
      return i;
    }
  };

  /* add methods to Date to check if DST is in effect
  */

  /* from http://stackoverflow.com/questions/11887934/check-if-daylight-saving-time-is-in-effect-and-if-it-is-for-how-many-hours
  */

  Date.prototype.stdTimezoneOffset = function() {
    var jan, jul;
    jan = new Date(this.getFullYear(), 0, 1);
    jul = new Date(this.getFullYear(), 6, 1);
    return Math.max(jan.getTimezoneOffset(), jul.getTimezoneOffset());
  };

  Date.prototype.dst = function() {
    return this.getTimezoneOffset() < this.stdTimezoneOffset();
  };

  /* SEASONS
  */

  get_season = function(now) {
    var seasons;
    seasons = Date.getSeasons(now.getFullYear());
    if (now < seasons[1]) {
      return 'winter';
    } else if (now < seasons[2]) {
      return 'spring';
    } else if (now < seasons[3]) {
      return 'summer';
    } else if (now < seasons[4]) {
      return 'fall';
    } else {
      return 'winter';
    }
  };

  /* define a scale for SUN and MOON altitude
  */

  altitude = d3.scale.linear().domain([-1, 1]).range([600, 0]);

  /* DAY/NIGHT
  */

  get_day_night = function(now) {
    var times;
    times = SunCalc.getTimes(now, LAT, LONG);
    if (now < times.sunriseEnd) {
      return 'night';
    } else if (now < times.dusk) {
      return 'day';
    } else {
      return 'night';
    }
  };

  /* update every 0.5 seconds
  */

  last_seconds = -1;

  last_sep = false;

  last_day_night = null;

  update_05_secs = function() {
    /* CLOCK
    */
    var clock_string, day_night, h, m, moon_alt, moon_phase, now, s, sun_alt;
    now = new Date();
    h = now.getHours();
    m = now.getMinutes();
    s = now.getSeconds();
    h = pad_time(h);
    m = pad_time(m);
    s = pad_time(s);
    if (s !== last_seconds) {
      last_sep = !last_sep;
      last_seconds = s;
    }
    clock_string = h;
    if (last_sep) {
      clock_string += ':';
    } else {
      clock_string += ' ';
    }
    clock_string += m;
    d3.select('#clock').text(clock_string);
    /* DAYLIGHT SAVINGS TIME
    */
    d3.select('#dst').text(now.dst() ? "LEG" : "SOL");
    /* CALENDAR
    */
    d3.select('#calendar').text("" + DAYS[now.getDay()] + " " + (now.getDate()) + " " + MONTHS[now.getMonth()] + " " + (now.getFullYear()));
    /* SEASONS
    */
    d3.select('#season').text((function() {
      switch (get_season(now)) {
        case 'winter':
          return 'inverno';
        case 'spring':
          return 'primavera';
        case 'summer':
          return 'estate';
        case 'fall':
          return 'autunno';
      }
    })());
    /* NETWORK status
    */
    d3.select('#router').classed('ok', navigator.onLine);
    d3.select('#wifirouter').classed('ok', true);
    /* SUN and MOON simulation
    */
    sun_alt = Math.sin(SunCalc.getPosition(now, LAT, LONG).altitude);
    moon_alt = Math.sin(SunCalc.getMoonPosition(now, LAT, LONG).altitude);
    moon_phase = SunCalc.getMoonIllumination(now);
    d3.select('#sun').attr('y', altitude(sun_alt)).attr('fill', '#FFF268');
    d3.select('#moon').attr('y', altitude(moon_alt)).attr('fill', '#BDDBFD');
    d3.select('#moon_symbol > path').attr('d', moon_phase.angle > 0 ? "M0 30 A30 30 0 1 1 0 -30 A" + (60 * Math.abs(moon_phase.fraction - 0.5)) + " 30 0 1 " + (moon_phase.fraction > 0.5 ? 1 : 0) + " 0 30" : "M0 30 A" + (60 * Math.abs(moon_phase.fraction - 0.5)) + " 30 0 1 " + (moon_phase.fraction > 0.5 ? 1 : 0) + " 0 -30 A30 30 0 1 1 0 30");
    /* NIGHT and DAY
    */
    day_night = get_day_night(now);
    if (day_night !== last_day_night) {
      if (day_night === 'day') {
        d3.select('body').transition().duration(3000).style('background', '#00BCD1');
        d3.select('#land').transition().duration(3000).attr('fill', '#ABEC72');
      } else if (day_night === 'night') {
        d3.select('body').transition().duration(3000).style('background', '#434367');
        d3.select('#land').transition().duration(3000).attr('fill', '#0A8690');
      }
      last_day_night = day_night;
    }
    return setTimeout((function() {
      return update_05_secs();
    }), 500);
  };

  /* update every 10 minutes
  */

  update_10_min = function() {
    /* WHEATER from OpenWeatherMap
    */    d3.json('http://api.openweathermap.org/data/2.5/weather?q=Ponsacco,it&APPID=eaecf85a68297fd2c57d209840cb81dc&lang=it', function(data) {
      var status;
      if (!(data != null)) return;
      d3.select('#temperature').text("" + (Math.round(data.main.temp - 273.15)) + "°");
      d3.select('#humidity').text("" + (Math.round(data.main.humidity)) + "%");
      if ((data.weather != null) && (data.weather[0] != null)) {
        status = +data.weather[0].icon.slice(0, 2);
        /* set haze visibility
        */
        if (status < 4) {
          d3.select('#haze').transition().duration(3000).attr('fill-opacity', 0);
        } else {
          d3.select('#haze').transition().duration(3000).attr('fill-opacity', 0.5);
        }
        /* set clouds visibility
        */
        if (status < 2 || status === 50) {
          d3.select('#clouds').transition().duration(3000).attr('opacity', 0);
        } else {
          d3.select('#clouds').transition().duration(3000).attr('opacity', 1);
        }
        /* set more clouds visibility
        */
        if (status < 3 || status === 50) {
          return d3.select('#more_clouds').transition().duration(3000).attr('opacity', 0);
        } else {
          return d3.select('#more_clouds').transition().duration(3000).attr('opacity', 1);
        }
      }
    });
    return setTimeout((function() {
      return update_10_min();
    }), 600000);
  };

  update_05_secs();

  update_10_min();

}).call(this);