pruncalc/ts/roi.ts

const profits: Promise<Profit[]> = (async function () {
	const response = await fetch('roi.json');
	return await response.json();
})();

const lowVolume = document.querySelector('#low-volume') as HTMLInputElement;

async function render() {
	const formatDecimal = new Intl.NumberFormat(undefined,
			{maximumFractionDigits: 2, maximumSignificantDigits: 6, roundingPriority: 'lessPrecision'}).format;
	const formatWhole = new Intl.NumberFormat(undefined, {maximumFractionDigits: 0}).format;
	const tbody = document.querySelector('tbody')!;
	tbody.innerHTML = '';
	for (const p of await profits) {
		const volumeRatio = p.output_per_day / p.average_traded_7d;
		if (!lowVolume.checked && volumeRatio > 0.05) {
			continue;
		}
		const tr = document.createElement('tr');
		const profit_per_area = p.profit_per_day / p.area;
		const break_even = p.profit_per_day > 0 ? p.capex / p.profit_per_day : Infinity;
		tr.innerHTML = `
			<td>${p.output}</td>
			<td>${p.expertise}</td>
			<td style="color: ${color(profit_per_area, 0, 500)}">${formatDecimal(profit_per_area)}</td>
			<td><span style="color: ${color(break_even, 30, 2)}">${formatDecimal(break_even)}</span>d</td>
			<td style="color: ${color(p.capex, 300_000, 50_000)}">${formatWhole(p.capex)}</td>
			<td style="color: ${color(p.cost_per_day, 40_000, 1_000)}">${formatWhole(p.cost_per_day)}</td>
			<td style="color: ${color(p.logistics_per_area, 2, 0.2)}">${formatDecimal(p.logistics_per_area)}</td>
			<td>
				${formatDecimal(p.output_per_day)}<br>
				<span style="color: ${color(volumeRatio, 0.05, 0.002)}">${formatWhole(p.average_traded_7d)}</span>
			</td>
		`;
		const output = tr.querySelector('td')!;
		output.title = p.recipe;
		tbody.appendChild(tr);
	}
}

function color(n: number, low: number, high: number): string {
	// scale n from low..high to 0..1 clamped
	const scale = Math.min(Math.max((n - low) / (high - low), 0), 1);
	return `color-mix(in oklch, #0c8 ${scale * 100}%, #f70)`;
}

lowVolume.addEventListener('change', render);
render();

interface Profit {
	output: string
	recipe: string
	expertise: string
	profit_per_day: number
	area: number
	capex: number
	cost_per_day: number
	logistics_per_area: number
	output_per_day: number
	average_traded_7d: number
}