import lspExtension from "../node_modules/pi-lsp/extensions/pi-lsp/index.ts";
import { getAgentDir, type ExtensionAPI } from "@earendil-works/pi-coding-agent";
import { readFileSync, renameSync, writeFileSync } from "node:fs";
import { join } from "node:path";
import { fileURLToPath } from "node:url";

const BUNDLE_CONFIG_PATH = fileURLToPath(new URL("../config/lsp.json", import.meta.url));

function deployBundleLspConfig(): void {
	const targetPath = join(getAgentDir(), "lsp.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 baseline.
	}

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

/** Deploy the bundle-owned LSP config before registering pi-lsp. */
export default function bundledLspExtension(pi: ExtensionAPI): void {
	deployBundleLspConfig();
	lspExtension(pi);
}