const API = process.env.FREEDOM_API ?? "https://api.freedom.st";

export async function getChainInfo(): Promise<Record<string, any>> {
  const res = await fetch(`${API}/info`);
  return res.json();
}

export async function getExchangeRates(): Promise<Record<string, number>> {
  const res = await fetch(`${API}/rates`);
  return res.json();
}

export async function getAddressInfo(address: string): Promise<any> {
  const res = await fetch(`${API}/address/${address}`);
  return res.json();
}

export async function getAddressInfoBulk(addresses: string[]): Promise<Record<string, any>> {
  if (addresses.length === 0) return {};
  const res = await fetch(`${API}/address`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ addresses }),
  });
  return res.json();
}

export async function fetchQrBase64(text: string): Promise<string> {
  const url = `${API}/qr/${encodeURIComponent(text)}`;
  try {
    const res = await fetch(url);
    if (!res.ok) return url;
    const buf = await res.arrayBuffer();
    const type = res.headers.get("content-type") || "image/png";
    const b64 = Buffer.from(buf).toString("base64");
    return `data:${type};base64,${b64}`;
  } catch {
    return url;
  }
}

export async function getAvailableCoins(): Promise<string[]> {
  const info = await getChainInfo();
  return Object.entries(info)
    .filter(([_, v]) => v != null)
    .map(([k]) => k);
}