const Popup=require('popup');
const levels=require('levels');
const config=require('config');

const upload=async (mode, win, snek) => {
	if(!win && !snek.rules.uploadOnDeath) return;
	if(window.serverless) return;

	const username=config.getS('player.name');
	const score=snek.score;
	const length=snek.length;
	const time=snek.endPlayTime;
	const speed=snek.speed;

	const rst=await fetch('api/leaderboards/'+mode, {
		method: 'POST',
		headers: {
			'Content-Type': 'application/json'
		},
		body: JSON.stringify({
			username,
			score, length,
			time, speed
		})
	});
	const dat=await rst.json();
	if(!dat.ok) console.error(rst.err);
};

const show=async (mode='speedrun/1', page=1) => {
	let popup=new Popup("Leaderboards: "+mode);

	const [category, id]=mode.split('/');
	let modes=[];
	(() => {
		Object.keys(window.levelList).forEach(cat => {
			window.levelList[cat].levels.forEach(lvl => {
				modes.push(cat+'/'+lvl);
			});
		});
	})();
	const prevMode=() => {
		let idx=modes.indexOf(mode);
		return modes[idx-1]||modes[modes.length-1];
	};
	const nextMode=() => {
		let idx=modes.indexOf(mode);
		return modes[idx+1]||modes[0];
	};

	const rules=await levels.getRules(category, id);
	const sort=rules.leaderboardsSort;
	const rst=await fetch('api/leaderboards/'+mode+'?sort='+sort+'&page='+page+'&results=10');
	const {ok, data, err}=await rst.json();

	popup.buttons.close="Close";
	popup.buttons.modeP="Previous mode";
	popup.buttons.modeN="Next mode";
	popup.large=true;
	popup.animation=false;

	if(ok) {
		popup.addStrong("Page "+page);
		if(data.length==10) popup.buttons.next="Next page";
		if(page>1) popup.buttons.prev="Previous page";

		if(data.length==0) {
			popup.addEm("No data");
		} else {
			const rpad=(n, digits=2, pad=' ') =>
				((''+n).length>=digits)?(''+n):(rpad(pad+n, digits, pad));

			popup.addTable(data.map(({username, score, length, speed, time}, i) => {
				return {
					rank: '#'+(i+(page-1)*10+1),
					username,
					score: score+'pts',
					length,
					speed: speed+'tps',
					time: rpad(Math.floor(time/60000), 2, '0')+
						':'+rpad(Math.floor(time/1000)%60, 2, '0')+
						':'+rpad(time%1000, 3, '0')
				};
			}), [
				'rank',
				'username',
				'score',
				'length',
				'speed',
				'time'
			]);
		}
	} else {
		popup.addStrong("Error loading leaderboards");
		popup.addEm(err);
	}

	Popup.dismiss();
	const verb=await popup.display();
	if(verb=='next') return show(mode, page+1);
	else if(verb=='prev') return show(mode, page-1);
	else if(verb=='modeP') return show(prevMode());
	else if(verb=='modeN') return show(nextMode());
	location.hash='';
};

return module.exports={
	upload, show
};