import brToNewline from '@derhuerst/br2nl';
import omit from 'lodash/omit.js';

const typesByIcon = Object.assign(Object.create(null), {
	HimWarn: 'status',
});

const parseMsgEdge = (ctx) => (e) => {
	const res = omit(e, [
		'icoX',
		'fLocX',
		'fromLocation',
		'tLocX',
		'toLocation',
	]);
	res.icon = e.icon || null;
	res.fromLocation = Array.isArray(e.fromLocations) && e.fromLocations[0] || e.fromLocation || null;
	res.toLocation = Array.isArray(e.toLocations) && e.toLocations[0] || e.toLocation || null;
	return res;
};

const fallbackTime = '000000'; // midnight
const parseMsgEvent = (ctx) => (e) => {
	const {profile} = ctx; // todo: test that covers this
	return {
		fromLocation: Array.isArray(e.fromLocations) && e.fromLocations[0] || e.fromLocation || null,
		toLocation: Array.isArray(e.toLocations) && e.toLocations[0] || e.toLocation || null,
		start: profile.parseDateTime(ctx, e.fDate, e.fTime || fallbackTime, null),
		end: profile.parseDateTime(ctx, e.tDate, e.tTime || fallbackTime, null),
		sections: e.sectionNums || [], // todo: parse
	};
};

const parseWarning = (ctx, w) => {
	const {profile, res: resp, common} = ctx;

	// todo: https://github.com/marudor/BahnhofsAbfahrten/blob/46a74957d68edc15713112df44e1a25150f5a178/src/types/HAFAS/HimSearch.ts#L31-L53
	// todo: act, pub, lead, tckr
	// todo: cat (1, 2), pubChL, rRefL/hints, impactL
	// todo: pubChL
	// [ { name: 'timetable',
	// fDate: '20180606',
	// fTime: '073000',
	// tDate: '20180713',
	// tTime: '030000' },
	// { name: 'export',
	// fDate: '20180606',
	// fTime: '073000',
	// tDate: '20180713',
	// tTime: '030000' } ]
	// { name: '1',
	// fDate: '20190219',
	// fTime: '000000',
	// tDate: '20190225',
	// tTime: '120000' }
	// todo: w.regionRefL & res.common.himMsgRegionL

	const icon = w.icon || null;
	const type = icon && icon.type && typesByIcon[icon.type] || 'warning';

	const res = {
		id: w.hid || null,
		type,
		summary: w.head
			? brToNewline(w.head)
			: null, // todo: decode HTML entities?
		text: w.text
			? brToNewline(w.text)
			: null, // todo: decode HTML entities?
		icon, // todo: parse icon
		priority: w.prio,
	};
	if ('prod' in w) {
		res.products = profile.parseProductsBitmask(ctx, w.prod);
	}
	if ('comp' in w) {
		res.company = w.comp || null;
	}

	// todo: parse to sth meaningful
	if ('cat' in w) {
		res.category = w.cat;
	}
	if (w.catRefL && resp.common && resp.common.himMsgCatL) {
		res.categories = w.catRefL
			.map(i => resp.common.himMsgCatL[i])
			.filter(e => Boolean(e))
			.map(cat => cat.id);
	}

	if (w.edgeRefL && resp.common && resp.common.himMsgEdgeL) {
		res.edges = w.edgeRefL
			.map(i => resp.common.himMsgEdgeL[i])
			.filter(e => Boolean(e))
			.map(parseMsgEdge(ctx));
	}
	if (w.eventRefL && resp.common && resp.common.himMsgEventL) {
		res.events = w.eventRefL
			.map(i => resp.common.himMsgEventL[i])
			.filter(e => Boolean(e))
			.map(parseMsgEvent(ctx));
	}

	if (w.affProdRefL) {
		res.affectedLines = w.affProdRefL
			.map(i => common.lines[i])
			.filter(l => Boolean(l));
	}
	if (w.fromLocations) {
		res.fromStops = w.fromLocations;
	}
	if (w.toLocations) {
		res.toStops = w.toLocations;
	}

	if (w.sDate && w.sTime) {
		res.validFrom = profile.parseDateTime(ctx, w.sDate, w.sTime, null);
	}
	if (w.eDate && w.eTime) {
		res.validUntil = profile.parseDateTime(ctx, w.eDate, w.eTime, null);
	}
	if (w.lModDate && w.lModTime) {
		res.modified = profile.parseDateTime(ctx, w.lModDate, w.lModTime, null);
	}

	return res;
};

export {
	parseWarning,
};