import { toString, QRCodeRenderersOptions } from 'qrcode';

type Colors = QRCodeRenderersOptions['color'];

export interface WifiInfo {
	ssid: string;
	password: string;
	hidden: boolean;
	encryption: 'WPA' | 'WEP' | 'None';
}

export interface MeCardInfo {
	adr?: string;
	bday?: string;
	email?: string;
	n?: string;
	nickname?: string;
	note?: string;
	sound?: string;
	tel?: string;
	tel_av?: string;
	url?: string;
}

// todo: css variables
export async function generate_qr_code(data: string, colors?: Colors) {
	colors = colors || {
		dark: 'var(--theme-text-heading, currentcolor)',
		light: 'var(--theme-bg-main, transparent)'
	};

	const svg = await toString(data, {
		type: 'svg',
		color: {
			dark: '#000000',
			light: '#ffffff'
		}
	});

	const colored_svg = svg.replace(/#000000/g, colors.dark).replace(/#ffffff/g, colors.light).trim();
	
	return colored_svg.replace(/^<svg /, '<svg class="qrcode" ')
}

export function generate_wifi_qr_code(info: WifiInfo, colors?: Colors) {
	const ssid = escape(info.ssid);
	const password = escape(info.password);

	let data = `WIFI:S:${ssid};P:${password};H:${info.hidden};`

	if (info.encryption) {
		data += `T:${info.encryption};`;
	}

	return generate_qr_code(data, colors);
}

export function generate_mecard_qr_code(info: MeCardInfo, colors?: Colors) {
	let data = 'MECARD:';

	if (info.adr) {
		data += `ADR:${escape(info.adr)};`;
	}

	if (info.bday) {
		data += `BDAY:${escape(info.bday)};`;
	}

	if (info.email) {
		data += `EMAIL:${escape(info.email)};`;
	}

	if (info.n) {
		data += `N:${escape(info.n)};`;
	}

	if (info.nickname) {
		data += `NICKNAME:${escape(info.nickname)};`;
	}

	if (info.adr) {
		data += `ADR:${escape(info.adr)};`;
	}

	if (info.adr) {
		data += `ADR:${escape(info.adr)};`;
	}

	if (info.adr) {
		data += `ADR:${escape(info.adr)};`;
	}

	if (info.adr) {
		data += `ADR:${escape(info.adr)};`;
	}

	if (info.adr) {
		data += `ADR:${escape(info.adr)};`;
	}

	data += ';';

	return generate_qr_code(data, colors);
}

function escape(str: string) {
	return str
		.replace(/\\/g, '\\\\')
		.replace(/"/g, '\\"')
		.replace(/;/g, '\\;')
		.replace(/,/g, '\\,')
		.replace(/:/g, '\\:');
}