#!/usr/bin/env bun
import { chmod, rm, writeFile } from "node:fs/promises";
import { join, resolve } from "node:path";

const root = resolve(import.meta.dir, "..");
const modules = [
	"amezing",
	"analysis",
	"astro",
	"database",
	"latex",
	"mdx",
	"optimize",
	"prettier-plugin",
	"shadcn",
	"tailwind",
];
const api = (process.env.MUDDLE_FORGEJO_URL ?? "https://git.crit.rip").replace(
	/\/$/,
	"",
);
const owner = process.env.MUDDLE_FORGEJO_OWNER ?? "mdl";
const arguments_ = process.argv.slice(2);
const push = arguments_.includes("--push");
const requested = arguments_.filter((argument) => !argument.startsWith("--"));
const selected = requested.length > 0 ? requested : modules;
const token = process.env.MUDDLE_FORGEJO_TOKEN;

if (push && !token) {
	throw new Error(
		"Set MUDDLE_FORGEJO_TOKEN before using --push.",
	);
}
for (const name of selected) {
	if (!modules.includes(name)) {
		throw new Error(`Unknown integration module ${name}`);
	}
}

async function run(
	command: string[],
	environment: Record<string, string | undefined> = {},
): Promise<string> {
	const child = Bun.spawn(command, {
		cwd: root,
		stdout: "pipe",
		stderr: "pipe",
		env: { ...process.env, ...environment },
	});
	const [stdout, stderr, status] = await Promise.all([
		new Response(child.stdout).text(),
		new Response(child.stderr).text(),
		child.exited,
	]);
	if (status !== 0) {
		throw new Error(`${command.join(" ")} failed\n${stderr || stdout}`);
	}
	return stdout.trim();
}

async function changed(path: string): Promise<boolean> {
	const tracked = await run(["git", "status", "--porcelain", "--", path]);
	return tracked.length > 0;
}

let askPass: string | undefined;
try {
	if (push && token) {
		askPass = join(import.meta.dir, `.forgejo-askpass-${process.pid}`);
		await writeFile(
			askPass,
			`#!/bin/sh\ncase "$1" in *Username*) printf '%s' token ;; *) printf '%s' "$MUDDLE_FORGEJO_TOKEN" ;; esac\n`,
		);
		await chmod(askPass, 0o700);
	}

	for (const name of selected) {
		const prefix = `modules/${name}`;
		const hasChanges = await changed(prefix);
		const message = `chore: update @muddle/${name} integration`;
		if (!push) {
			console.log(
				`would ${hasChanges ? `commit with "${message}" and ` : ""}sync @muddle/${name} to ${api}/${owner}/${name}.git`,
			);
			continue;
		}
		if (hasChanges) {
			await run(["git", "add", "--", prefix]);
			await run(["git", "commit", "-m", message, "--", prefix]);
		}
		const branch = await run([
			"git",
			"subtree",
			"split",
			"--prefix",
			prefix,
		]);
		await run([
			"git",
			"push",
			`${api}/${owner}/${name}.git`,
			`${branch}:refs/heads/main`,
		], {
			GIT_ASKPASS: askPass,
			GIT_TERMINAL_PROMPT: "0",
		});
		console.log(`pushed @muddle/${name}`);
	}
} finally {
	if (askPass) await rm(askPass, { force: true });
}