const flags = [
	{
		id: 'gradient-pride',
		colors: ['#E04641', '#DE7E41', '#E4D56F', '#55B85F', '#2473B5', '#6F5DA5'],
		transform: 'rotate(90)'
	}, {
		id: 'gradient-trans',
		colors: ['#55CDFC', '#F7A8B8', '#FFFFFF', '#F7A8B8', '#55CDFC'],
		transform: 'rotate(90)'
	}
];

const generateGradient = colors => {
	const steps = colors.length;
	return steps.map((color, index) => { return [
		[color, (index / steps)],
		[color, (index + 1) / steps]
	]}).flat();
};

const generateStops = (colors, opacity) => {
	return generateGradient(colors).map((color, offset) => {
		return `<stop stop-color="${color}" stop-opacity="${opacity}" offset="${offset * 100}%"></stop>`;
	});
};

const makeLinearGradientSvg = (id, colors, opacity, transform) => {
	return `<svg xmlns="http://www.w3.org/2000/svg">
		  <defs>
		    <linearGradient id="${id}" gradientTransform="${transform}">
		      ${generateStops(colors, opacity)}
		    </linearGradient>
		  </defs>
		</svg>`;
};

flags.forEach(flag => {
	const container = document.createElement('div');
	container.classList.add('hidden-visually');
	container.ariaHidden = true;
	container.innerHTML = makeLinearGradientSvg(flag.id, flag.colors, flag.opacity ?? '0.8', flag.transform ?? 'rotate(0)');
	document.body.prepend(container);
});