const RECOVERY =
	"Build the native helpers locally, set `tools.customRustBinariesDir` in `pi-codex-conversion.json`, then run `/reload`";

function errorMessage(error: unknown): string {
	return error instanceof Error ? error.message : String(error);
}

function errorCode(error: unknown): string | undefined {
	if (!error || typeof error !== "object" || !("code" in error))
		return undefined;
	return typeof error.code === "string" ? error.code : undefined;
}

export function nativeBinaryRecoveryMessage(
	helper: string,
	error: unknown,
	options: {
		binaryPath?: string | undefined;
		platform?: NodeJS.Platform | undefined;
		startupWriteFailure?: boolean | undefined;
	} = {},
): string | undefined {
	if ((options.platform ?? process.platform) !== "linux") return undefined;
	const message = errorMessage(error);
	const loaderFailure =
		/Could not start dynamically linked executable|NixOS cannot run dynamically linked|stub-ld|(?:version [`']?)?GLIBC_[0-9.]+[`']? not found|error while loading shared libraries: [^\n]+: cannot open shared object file/i.test(
			message,
		);
	const startupPipeFailure =
		options.startupWriteFailure === true &&
		(errorCode(error) === "EPIPE" || /\bEPIPE\b|broken pipe/i.test(message));
	const missingInterpreter =
		errorCode(error) === "ENOENT" &&
		!!options.binaryPath &&
		existsSync(options.binaryPath);
	if (!loaderFailure && !startupPipeFailure && !missingInterpreter)
		return undefined;
	return `${helper} cannot run on this system. ${RECOVERY}`;
}

export function formatNativeBinaryError(
	helper: string,
	error: unknown,
	options?: {
		binaryPath?: string | undefined;
		platform?: NodeJS.Platform | undefined;
		startupWriteFailure?: boolean | undefined;
	},
): string {
	return (
		nativeBinaryRecoveryMessage(helper, error, options) ?? errorMessage(error)
	);
}

import { existsSync } from "node:fs";