export async function readJsonFile(file) {
  try {
    return JSON.parse(await file.text());
  } catch (error) {
    const reason = error instanceof Error ? error.message : String(error);
    throw new Error(`${file.name} 파일은 올바른 JSON이 아닙니다: ${reason}`);
  }
}

export function downloadJson(value, fileName) {
  const body = `${JSON.stringify(value, null, 2)}\n`;
  const url = URL.createObjectURL(new Blob([body], { type: "application/json" }));
  const anchor = document.createElement("a");
  anchor.href = url;
  anchor.download = fileName;
  anchor.click();
  setTimeout(() => URL.revokeObjectURL(url), 0);
}

export function downloadBlob(blob, fileName) {
  const url = URL.createObjectURL(blob);
  const anchor = document.createElement("a");
  anchor.href = url;
  anchor.download = fileName;
  anchor.click();
  setTimeout(() => URL.revokeObjectURL(url), 0);
}

export async function sha256File(file) {
  const digest = await crypto.subtle.digest("SHA-256", await file.arrayBuffer());
  return [...new Uint8Array(digest)].map((value) => value.toString(16).padStart(2, "0")).join("");
}

export function deepClone(value) {
  return structuredClone(value);
}