function weatherFailure() {
    Pebble.sendAppMessage({ PKJS_TEMP_BAR_COUNT: -1 });
}

var xhrRequest = function (url, type, callback) {
    var xhr = new XMLHttpRequest();
    xhr.timeout = 7500;
    xhr.onload = function () {
        if (xhr.status === 200) {
            callback(this.responseText);
        } else {
            weatherFailure();
        }
    };
    xhr.onerror = function () {
        weatherFailure();
    };
    xhr.ontimeout = function () {
        weatherFailure();
    };
    xhr.open(type, url);
    xhr.send();
};

function locationSuccess(pos) {
    var url = 'https://api.open-meteo.com/v1/forecast?' +
        'latitude=' + pos.coords.latitude +
        '&longitude=' + pos.coords.longitude +
        '&current=temperature_2m';

    xhrRequest(url, 'GET',
        function (responseText) {
            const current_temp = JSON.parse(responseText).current.temperature_2m;
            const min_temp = JSON.parse(localStorage.getItem('clay-settings')).CLAY_TEMP_BAR_0;
            const max_temp = min_temp + 80;

            const clamped_temp = Math.min(Math.max(current_temp, min_temp), max_temp);
            const normalized_temp = clamped_temp - min_temp;
            const temp_bars = Math.round(normalized_temp / 4);

            Pebble.sendAppMessage({ PKJS_TEMP_BAR_COUNT: temp_bars });
        }
    );
}

function getWeather() {
    navigator.geolocation.getCurrentPosition(
        locationSuccess,
        weatherFailure,
        { timeout: 7500, maximumAge: 60000 }
    );
}

Pebble.addEventListener("appmessage", function (dict) {
    if (dict.payload["PKJS_TEMP_BAR_COUNT"]) {
        getWeather();
    }
});