import type { Cookies } from '@sveltejs/kit'
import { env } from '$env/dynamic/private'
import { get, writable } from 'svelte/store'
import { existsSync, readFileSync } from 'fs'

export const scopeCookies = (cookies: Cookies, path: string) => {
    return {
        get: (key: string) => {
            return cookies.get(key)
        },
        set: (key: string, value: string, props: import('cookie').CookieSerializeOptions = {}) => {
            cookies.set(key, value, { ...props, path })
        },
        delete: (key: string, props: import('cookie').CookieSerializeOptions = {}) => {
            cookies.delete(key, { ...props, path })
        }
    }
}

export const visitCountFile = `${env.WEBSITE_DATA_DIR}/visitcount`
export const visitCount = writable(parseInt(existsSync(visitCountFile) ? readFileSync(visitCountFile).toString() : '0'));

const cachedLastTrack = writable<{track: LastTrack | null, since: number}>({track: null, since: 0})
export type LastTrack = {name: string, artist: string, image: string | null, link: string}
export const lastFmGetNowPlaying: () => Promise<LastTrack | null> = async () => {
    var cached = get(cachedLastTrack)
    if (Date.now() - cached.since < 10 * 1000) {
        return cached.track
    }
    try {
        const API_URL = "https://ws.audioscrobbler.com/2.0/?method=user.getrecenttracks&user=yusdacra&api_key=da1911d405b5b37383e200b8f36ee9ec&format=json&limit=1"
        var resp = await (await fetch(API_URL)).json()
        var track = resp.recenttracks.track[0] ?? null
        if (!(track['@attr'].nowplaying ?? null)) {
            throw "no nowplaying track found"
        }
        var data = {
            name: track.name,
            artist: track.artist['#text'],
            image: track.image[2]['#text'] ?? null,
            link: track.url,
        }
        cachedLastTrack.set({track: data, since: Date.now()})
        return data
    } catch(why) {
        console.log("could not fetch last fm: ", why)
        cachedLastTrack.set({track: null, since: Date.now()})
        return null
    }
}