import { readFileSync, statSync } from "node:fs";
import { join } from "node:path";
import t, { type ArgumentHandler } from "@bomb.sh/tab";
import { cacheDir } from "./util.js";

// completions must answer instantly, so hosts come from the newest cached
// snapshot (full or lite) — never the network. cold cache → no suggestions.
const hostHandler: ArgumentHandler = (complete) => {
	const snapshots = ["network3", "network3-lite"]
		.map((key) => join(cacheDir, `${key}.json`))
		.map((file) => {
			try {
				return { file, mtime: statSync(file).mtimeMs };
			} catch {
				return null;
			}
		})
		.filter((s) => s !== null)
		.sort((a, b) => b.mtime - a.mtime);
	if (!snapshots[0]) return;
	try {
		const network = JSON.parse(readFileSync(snapshots[0].file, "utf8")) as {
			knots: {
				host: string;
				local: boolean;
				repoCount: number;
				version: string;
			}[];
		};
		for (const k of network.knots) {
			if (!k.local) complete(k.host, `${k.repoCount} repos · ${k.version}`);
		}
	} catch {
		// unreadable snapshot — no suggestions
	}
};

const list = t.command("list", "every knot on the network");
list.option("json", "machine-readable output");
list.option("all", "include localhost/dev junk knots");
list.option("fresh", "skip the 5-minute cache");
list.option("no-repos", "skip the slow repo sweep (no counts, knots-only)");
list.option("down", "only unreachable knots");
list.option("stale", "only pre-v1.15 knots (the silent-data-loss cohort)");
list.option("managed", "only tangled-hosted knots");
list.option("self-hosted", "only self-hosted knots");

const check = t.command("check", "health-check one knot");
check.option("mine", "check every knot you own instead");
check.option("as", "who you are (handle or did)");
check.option("json", "machine-readable output");
check.argument("host", hostHandler);

t.command("stats", "network aggregates").option(
	"json",
	"machine-readable output",
);

const repos = t.command("repos", "what repos live on a knot");
repos.option("json", "machine-readable output");
repos.argument("host", hostHandler);

t.command("spindles", "the ci runner fleet").option(
	"json",
	"machine-readable output",
);

t.command("find", "search repos across the network").option(
	"json",
	"machine-readable output",
);

t.command("watch", "live network board");

export function runComplete(argv: string[]) {
	if (argv[0] === "--") t.parse(argv.slice(1));
	else t.setup("fid", "fid", argv[0] ?? "zsh");
}