import * as fs from "fs";
import { expandPath } from "./securityEnhanced";

export async function fileChecksum(filePath: string, algorithm: "sha256" | "md5" = "sha256"): Promise<string> {
  try {
    const crypto = await import("crypto");
    const hash = crypto.createHash(algorithm);
    const stream = fs.createReadStream(expandPath(filePath));
    return new Promise<string>((resolve, reject) => {
      stream.on("data", (chunk: string | Buffer) => hash.update(chunk));
      stream.on("end", () => resolve(hash.digest("hex")));
      stream.on("error", (err) => { stream.destroy(); reject(err); });
    });
  } catch (err) {
    throw new Error(`Failed to compute checksum: ${filePath} — ${(err as Error).message}`);
  }
}

import * as fs from "fs";
import { expandPath } from "./securityEnhanced";

export async function fileChecksum(filePath: string, algorithm: "sha256" | "md5" = "sha256"): Promise<string> {
  try {
    const crypto = await import("crypto");
    const hash = crypto.createHash(algorithm);
    const stream = fs.createReadStream(expandPath(filePath));
    return new Promise<string>((resolve, reject) => {
      stream.on("data", (chunk: string | Buffer) => hash.update(chunk));
      stream.on("end", () => resolve(hash.digest("hex")));
      stream.on("error", (err) => { stream.destroy(); reject(err); });
    });
  } catch (err) {
    throw new Error(`Failed to compute checksum: ${filePath} — ${(err as Error).message}`);
  }
}