import { styleText } from "node:util";
import * as p from "@clack/prompts";
import { loadNetwork, type Network } from "../core/network.js";

const dim = (s: string) => styleText("dim", s);

export async function run(flags: {
	json?: boolean;
	all?: boolean;
	fresh?: boolean;
}) {
	if (!flags.json) p.intro(styleText("green", "fiddling with knots"));
	const spin = flags.json ? null : p.spinner();
	spin?.start("assembling the network");
	let network: Network;
	try {
		network = await loadNetwork(!!flags.fresh, (msg) => spin?.message(msg));
	} catch (err) {
		spin?.stop("upstream failure", 1);
		console.error(err instanceof Error ? err.message : err);
		process.exit(2);
	}
	spin?.stop(`network assembled ${dim(`(${network.generatedAt})`)}`);

	if (flags.json) {
		console.log(JSON.stringify(network.spindles, null, 2));
		return;
	}

	const shown = flags.all
		? network.spindles
		: network.spindles.filter((s) => !s.local);
	const hidden = network.spindles.length - shown.length;

	const status = (s: (typeof shown)[number]) => {
		if (s.local) return dim("local");
		if (s.probe?.reachable)
			return styleText("green", `up ${s.probe.latencyMs ?? "?"}ms`);
		return styleText("red", "down");
	};

	const rows = shown.map((s) => [
		s.host,
		String(s.repoCount),
		status(s),
		s.owners[0]
			? `@${s.owners[0].handle}${s.owners.length > 1 ? dim(` +${s.owners.length - 1}`) : ""}`
			: dim("—"),
	]);

	const header = ["HOST", "REPOS", "STATUS", "OWNER"];
	// biome-ignore lint/suspicious/noControlCharactersInRegex: stripping our own ansi colors for width math
	const visible = (s: string) => s.replace(/\x1b\[\d+m/g, "").length;
	const widths = header.map((h, i) =>
		Math.max(h.length, ...rows.map((r) => visible(r[i]))),
	);
	const line = (cells: string[]) =>
		cells.map((c, i) => c + " ".repeat(widths[i] - visible(c))).join("  ");

	p.log.message([dim(line(header)), ...rows.map((r) => line(r))].join("\n"));

	const reachable = shown.filter((s) => s.probe?.reachable).length;
	p.outro(
		dim(
			`${shown.length} spindles · ${reachable} reachable` +
				(hidden ? ` · ${hidden} local/dev hidden (--all)` : ""),
		),
	);
}