import { spawnSync } from "node:child_process";
import { mkdtemp, readFile, rm } from "node:fs/promises";
import { tmpdir } from "node:os";
import { join, resolve } from "node:path";

const temporaryDirectory = await mkdtemp(
	join(tmpdir(), "wealth-ledger-openapi-"),
);
const generatedPath = join(temporaryDirectory, "schema.d.ts");
const committedPath = resolve("src/shared/api/generated/schema.d.ts");
const cliPath = resolve("node_modules/openapi-typescript/bin/cli.js");
let exitCode = 0;

try {
	const generated = spawnSync(
		process.execPath,
		[cliPath, "src/shared/api/spec/openapi.json", "-o", generatedPath],
		{ encoding: "utf8" },
	);

	if (generated.status !== 0) {
		process.stderr.write(generated.stderr || generated.stdout);
		exitCode = generated.status ?? 1;
	} else {
		const [committed, current] = await Promise.all([
			readFile(committedPath, "utf8"),
			readFile(generatedPath, "utf8"),
		]);
		if (committed !== current) {
			console.error(
				"Generated OpenAPI types are stale. Run `npm run openapi:generate` and commit the result.",
			);
			exitCode = 1;
		}
	}
} finally {
	await rm(temporaryDirectory, { recursive: true, force: true });
}

process.exitCode = exitCode;