#!/usr/bin/env -S npx nodejsscript
/* jshint esversion: 11,-W097, -W040, module: true, node: true, expr: true, undef: true *//* global echo, $, pipe, s, fetch, cyclicLoop */
const { version, description }= s.cat("package.json").xargs(JSON.parse);
const today= [ 6, 0, 1, 2, 3, 4, 5 ][new Date().getDay()];

$.api()
.version(version)
.describe(description)
.command("pull", "Update article list")
.option("--git", "Update git repository")
.option("--dry-run", "Dry run")
.action(async function pull({ git: is_git= false, ["dry-run"]: dryRun= false, ..._ }= {}){
	if(dryRun) is_git= false;
	if(is_git) s.run`git pull --rebase`;
	
	const menicka= await Promise.allSettled([ menickoCukrovarka(), menickoGlobus(), menickoMamafoodbistro() ])
		.then(results=> results.filter(p=> p.status!=="rejected").map(p=> p.value));
	const days= [ "pondělí", "úterý", "středa", "čtvrtek", "pátek", "sobota", "neděle" ];
	const out_head= description+"\n\n" + days.map((v)=> `[${v}](#${v})`).join(" · "); // anchors for days
	let out= "";
	for(let i= today; i < days.length; i++){ // menicka
		const day= days[i];
		out+= `\n\n## ${day}\n`;
		out+= menicka.map(dayToMd(day)).join("\n");
	}
	const gen= [ "<!-- generated -->", "<!-- /generated -->" ];
	const target= "README.md";
	const readme= s.cat(target);
	const readme_before= readme.indexOf(gen[0])-1;
	const readme_today= today===0 ? -1 : readme.indexOf(`## ${days[today]}`, readme_before)-2;
	out= [
		readme.slice(0, readme_before),
		readme_today < 0 ? gen[0]+out_head : readme.slice(readme_before+1, readme_today),
		out.replace(/(\*)/g, "\\$1"),
		gen[1], readme.slice(readme.indexOf("\n", readme.indexOf(gen[1]))+1)
	].join("\n");
	if(dryRun) echo(out);
	else s.echo(out).to(target);
	
	if(is_git) gitCommit([ target ], "pull");
	$.exit(0);
})
.parse();

function dayToMd(day){
	return function({ symbol, name, url, dny }){
		let has= Reflect.has(dny, day);
		if(!has && (day==="sobota" || day==="neděle") && Reflect.has(dny, "víkend")){
			has= true;
			day= "víkend";
		}
		const section= `[${symbol} ${name}](${url})`;
		if(!has) return `- ${section}: —`;
		
		let  out= `- ${section}:`;
		const { polevky, hlavni }= dny[day];
		const food= f=> out+= `\n  - ${f}`;
		polevky.forEach(food);
		hlavni.forEach(food);
		return out;
	};
}
function gitCommit(files, des= "not specified"){
	if(!files.length || !s.run`git diff --numstat`.trim())
		return echo("Nothig todo");
	
	echo("Diff to save");
	s.run`git config user.name "Bot"`;
	s.run`git config user.email "${"zc.murtnec@naj.elrdna".split("").reverse().join("")}"`;
	s.run`git add ${files}`;
	s.run`git commit -m "Updated by bot – ${des}"`;
	s.run`git push`;
	s.run`git config --remove-section user`;
}

import { JSDOM, VirtualConsole } from "jsdom";
async function fetchHTML(url){
	const res= await fetch(url);
	if(res.status !== 200) throw new Error(`Fetch failed with status ${res.status}`);
	let text;
	if(res.headers.get("Content-Type").includes("charset=windows-1250"))
		text= await res.arrayBuffer().then(buff=> new TextDecoder('windows-1250').decode(buff));
	else
		text= await res.text();

	const virtualConsole = new VirtualConsole();
	virtualConsole.on("error", () => {
		// No-op to skip console errors.
	});
	return (new JSDOM(text, { virtualConsole })).window;
}
async function menickoMamafoodbistro(){
	const url= "https://www.mamafoodbistro.cz/#poledne";
	const { document }= await fetchHTML(url);
	const menicko= document.querySelectorAll("section")[2].getElementsByClassName("sqs-html-content")[1];
	const dny= {};
	for(const den of menicko.getElementsByTagName("h4")){
		const polevka= den.nextElementSibling;
		let hi= polevka.nextElementSibling;
		const hlavni= [ hi ];
		while(( hi= hi.nextElementSibling ) && hi.tagName !== "H4")
			hlavni.push(hi);
		Reflect.set(dny, den.textContent.trim().toLowerCase(), {
			polevky: [ polevka.textContent ],
			hlavni: hlavni.map(el=> el.textContent),
		});
	}

	return { name: "MAMAFOOD", symbol: "🍎", url, dny };
}
async function menickoCukrovarka(){
	const url= "https://www.menicka.cz/api/iframe/?id=8542&continuous=true";
	const { document }= await fetchHTML(url);
	const food= el=> el.getElementsByClassName("food")[0].textContent;
	const dny= {};
	for(const den of document.getElementsByClassName("content")){
		let name= den.getElementsByTagName("h2")[0].textContent.trim();
		name= name.slice(0, name.indexOf(" ")).toLowerCase();
		const [ polevka ]= den.getElementsByClassName("soup");
		const hlavni= den.getElementsByClassName("main");
		Reflect.set(dny, name, {
			polevky: [ food(polevka) ],
			hlavni: [ ...hlavni ].map(food),
		});
		if(name==="neděle") break;
	}

	return { name: "Jídelna Čakovice", symbol: "🏭", url, dny };
}
async function menickoGlobus(){
	const url= "https://www.globus.cz/praha-cakovice/sluzby-a-produkty/restaurace#klasicke-menu";
	const { document }= await fetchHTML(url);
	const menicko= document.getElementById("klasicke-menu");
	const dny= {};
	for(const den of menicko.getElementsByTagName("li")){
		const name= den.getElementsByTagName("h3")[0].textContent.trim();
		const vse= [ ...den.getElementsByTagName("tr") ].map(el=> el.getElementsByTagName("td")[1].textContent.trim());
		Reflect.set(dny, name, {
			polevky: vse.slice(0, 2),
			hlavni: vse.slice(2),
		});
	}

	return { name: "Globus", symbol: "🏪", url, dny };
}