import { mkdirSync, readFileSync, renameSync, writeFileSync } from "node:fs";
import { dirname, join } from "node:path";
import { fileURLToPath } from "node:url";

const BUNDLE_CONFIG_PATH = fileURLToPath(new URL("../config/pi-hashline-edit.json", import.meta.url));

export function deployBundleHashlineConfig(agentDir: string): void {
	const targetPath = join(agentDir, "hashline.json");
	const bundledConfig = readFileSync(BUNDLE_CONFIG_PATH, "utf8");

	try {
		if (readFileSync(targetPath, "utf8") === bundledConfig) {
			return;
		}
	} catch {
		// Missing or unreadable target: replace it with the bundle-owned defaults.
	}

	mkdirSync(dirname(targetPath), { recursive: true });
	const temporaryPath = `${targetPath}.my-pi.tmp`;
	writeFileSync(temporaryPath, bundledConfig, "utf8");
	renameSync(temporaryPath, targetPath);
}