(() => {
  const weather = require("weather");

  var dirty = false;

  let settings;

  function loadSettings() {
    settings = require("Storage").readJSON("weatherSetting.json", 1) || {};
  }

  function setting(key) {
    if (!settings) { loadSettings(); }
    const DEFAULTS = {
      "expiry": 2*3600000,
      "hide": false
    };
    return (key in settings) ? settings[key] : DEFAULTS[key];
  }

  weather.on("update", w => {
    if (setting("hide")) return;
    if (w) {
      if (!WIDGETS.weather.width) {
        WIDGETS.weather.width = 20;
        Bangle.drawWidgets();
      } else if (Bangle.isLCDOn()) {
        WIDGETS.weather.draw();
      } else {
        dirty = true;
      }
    }
    else {
      WIDGETS.weather.width = 0;
      Bangle.drawWidgets();
    }
  });

  Bangle.on("lcdPower", on => {
    if (on && dirty && !setting("hide")) {
      WIDGETS.weather.draw();
      dirty = false;
    }
  });

  WIDGETS.weather = {
    area: "tl",
    width: weather.get() && !setting("hide") ? 20 : 0,
    draw: function() {
      if (setting("hide")) return;
      const w = weather.get();
      if (!w) return;
      g.reset();
      g.clearRect(this.x, this.y, this.x+this.width-1, this.y+23);
      if (w.code||w.txt) {
        weather.drawIcon(w, this.x+10, this.y+8, 7.5);
      }
      if (w.temp) {
        let t = require("locale").temp(w.temp-273.15);  // applies conversion
        t = t.match(/[\d\-]*/)[0]; // but we have no room for units
        g.reset();
        g.setFontAlign(0, 1); // center horizontally at bottom of widget
        g.setFont("6x8", 1);
        g.drawString(t, this.x+10, this.y+24);
      }
    },
    reload:() => {
      loadSettings();
      WIDGETS.weather.redraw();
    },
  };
})();