import options from "options";
import { UnitType, Weather, WeatherIconTitle, WeatherIcon } from "lib/types/weather.js";
import { DEFAULT_WEATHER } from "lib/types/defaults/weather.js";
import GLib from "gi://GLib?version=2.0";
import { weatherIcons } from "modules/icons/weather.js";

const { key, interval, location } = options.menus.clock.weather;

export const globalWeatherVar = Variable<Weather>(DEFAULT_WEATHER);

let weatherIntervalInstance: null | number = null;

const weatherIntervalFn = (weatherInterval: number, loc: string, weatherKey: string) => {
    if (weatherIntervalInstance !== null) {
        GLib.source_remove(weatherIntervalInstance);
    }

    const formattedLocation = loc.replace(" ", "%20");

    weatherIntervalInstance = Utils.interval(weatherInterval, () => {
        Utils.execAsync(
            `curl "https://api.weatherapi.com/v1/forecast.json?key=${weatherKey}&q=${formattedLocation}&days=1&aqi=no&alerts=no"`,
        )
            .then((res) => {
                try {
                    if (typeof res !== "string") {
                        return (globalWeatherVar.value = DEFAULT_WEATHER);
                    }

                    const parsedWeather = JSON.parse(res);

                    if (Object.keys(parsedWeather).includes("error")) {
                        return (globalWeatherVar.value = DEFAULT_WEATHER);
                    }

                    return (globalWeatherVar.value = parsedWeather);
                } catch (error) {
                    globalWeatherVar.value = DEFAULT_WEATHER;
                    console.warn(`Failed to parse weather data: ${error}`);
                }
            })
            .catch((err) => {
                console.error(`Failed to fetch weather: ${err}`);
                globalWeatherVar.value = DEFAULT_WEATHER;
            });
    });
};

Utils.merge([key.bind("value"), interval.bind("value"), location.bind("value")], (weatherKey, weatherInterval, loc) => {
    if (!weatherKey) {
        return (globalWeatherVar.value = DEFAULT_WEATHER);
    }
    weatherIntervalFn(weatherInterval, loc, weatherKey);
});

export const getTemperature = (wthr: Weather, unt: UnitType) => {
    if (unt === "imperial") {
        return `${Math.ceil(wthr.current.temp_f)}° F`;
    } else {
        return `${Math.ceil(wthr.current.temp_c)}° C`;
    }
};

export const getWeatherIcon = (fahren: number) => {
    const icons = {
        100: "",
        75: "",
        50: "",
        25: "",
        0: "",
    } as const;
    const colors = {
        100: "weather-color red",
        75: "weather-color orange",
        50: "weather-color lavender",
        25: "weather-color blue",
        0: "weather-color sky",
    } as const;

    type IconKeys = keyof typeof icons;

    const threshold: IconKeys =
        fahren < 0
            ? 0
            : ([100, 75, 50, 25, 0] as IconKeys[]).find((threshold) => threshold <= fahren) || 0;

    const icon = icons[threshold || 50];
    const color = colors[threshold || 50];

    return {
        icon,
        color,
    };
};

export const getWindConditions = (wthr: Weather, unt: UnitType) => {
    if (unt === "imperial") {
        return `${Math.floor(wthr.current.wind_mph)} mph`;
    }
    return `${Math.floor(wthr.current.wind_kph)} kph`;
};

export const getRainChance = (wthr: Weather) => `${wthr.forecast.forecastday[0].day.daily_chance_of_rain}%`;

export const isValidWeatherIconTitle = (title: string): title is WeatherIconTitle => {
    return title in weatherIcons;
};

export const getWeatherStatusTextIcon = (wthr: Weather): WeatherIcon => {
    let iconQuery = wthr.current.condition.text
        .trim()
        .toLowerCase()
        .replaceAll(" ", "_");

    if (!wthr.current.is_day && iconQuery === "partly_cloudy") {
        iconQuery = "partly_cloudy_night";
    }

    if (isValidWeatherIconTitle(iconQuery)) {
        return weatherIcons[iconQuery];
    } else {
        console.warn(`Unknown weather icon title: ${iconQuery}`);
        return weatherIcons["warning"];
    }
};

globalThis["globalWeatherVar"] = globalWeatherVar;