// Runs in the page's own JavaScript world and defines window.nostr (NIP-07).
// Calls are forwarded to content.js with postMessage, then to the background
// worker, which asks the user before any site can use the key.
(() => {
  if (window.nostr) return; // another signer extension got here first

  const pending = new Map();
  let seq = 0;

  window.addEventListener("message", (e) => {
    if (e.source !== window || e.data?.__goostr !== "res") return;
    const p = pending.get(e.data.id);
    if (!p) return;
    pending.delete(e.data.id);
    if (e.data.error) p.reject(new Error(e.data.error));
    else p.resolve(e.data.result);
  });

  const call = (method, params) =>
    new Promise((resolve, reject) => {
      const id = `goostr-${++seq}-${Math.random().toString(36).slice(2)}`;
      pending.set(id, { resolve, reject });
      window.postMessage({ __goostr: "req", id, method, params }, location.origin);
    });

  window.nostr = {
    getPublicKey: () => call("getPublicKey"),
    signEvent: (event) => call("signEvent", { event }),
    getRelays: () => call("getRelays"),
    nip04: {
      encrypt: (pubkey, plaintext) => call("nip04.encrypt", { pubkey, plaintext }),
      decrypt: (pubkey, ciphertext) => call("nip04.decrypt", { pubkey, ciphertext }),
    },
    nip44: {
      encrypt: (pubkey, plaintext) => call("nip44.encrypt", { pubkey, plaintext }),
      decrypt: (pubkey, ciphertext) => call("nip44.decrypt", { pubkey, ciphertext }),
    },
  };
})();