// Copyright (C) 2023 Vaughn Nugent
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

(() => {  
  const ext = '@vnuge/nvault-extension'
  const debugLog = (...args) => console.log(`[${ext}]`, ...args)
  const sendMessage = (type, payload) => new Promise((resolve, reject) => {
    const id = Math.random().toString(36);
    waiting.set(id, { resolve, reject });
    window.postMessage({ type, payload, id, ext }, '*');
  });

  const waiting = new Map();

  /**
   * Listen for messages from the content script
   */
  window.addEventListener('message', ({ data }) => {

    //Confirm the message format is correct
    if (!data || !data.response || data.ext !== ext || !waiting.get(data.id)) {
      return;
    }

    debugLog(data)

    //Explode now valid
    const { response, id } = data;
    const { resolve, reject } = waiting.get(id);

    if (response.error) {
      //Reject the promise as error
      reject(response.error);

    } else {
      //Resolve the promise as success
      resolve(response);
    }

    //Remove the waiter from the list
    waiting.delete(id)
  });

  //Expose the Nostr API to the window object
  window.nostr = {

    //Redirect calls to the background script
    getPublicKey: () => sendMessage('getPublicKey', {}),
    getRelays: () => sendMessage('getRelays', {}),

    async signEvent(event) {
      const signed = await sendMessage('signEvent', { event })
      debugLog("Signed event", signed);
      return signed
    },

    nip04: {
      encrypt: (peer, plaintext) => sendMessage('nip04.encrypt', { peer, plaintext }),
      decrypt: (peer, ciphertext) => sendMessage('nip04.decrypt', { peer, ciphertext }),
    },
  };
})()