/* Copyright © 2025 Jakob L. Kreuze

   This file is part of SRS Anywhere.

   SRS Anywhere 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.

   SRS Anywhere 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 SRS Anywhere. If not, see <https://www.gnu.org/licenses/>. */

window.addEventListener("load", () => {
  const passwordField = document.getElementById('network-password');

  const urlParams = new URLSearchParams(window.location.search);
  let password = localStorage.getItem('password') || urlParams.get('password');
  if (password) {
    passwordField.value = password;
  }

  const btn = document.getElementById('open-network');
  if (!btn) {
    console.warn('Button with id="open-network" not found.');
    return;
  }

  btn.addEventListener('click', function () {
    const password = passwordField.value;
    const xhr = new XMLHttpRequest();
    xhr.open('GET', '/cgi-bin/deck.py', true);
    xhr.setRequestHeader('PASSWORD', password);
    xhr.onreadystatechange = function () {
      if (xhr.readyState === XMLHttpRequest.DONE) {
        if (xhr.status >= 200 && xhr.status < 300) {
          localStorage.setItem('password', password);
          loadCards(JSON.parse(xhr.responseText));
        } else {
          reportException(xhr.statusText);
        }
      }
    };
    xhr.send();
  });
});

const downloadJSONOld = downloadJSON;
function downloadJSON(obj) {
  const password = document.getElementById('network-password').value;
  const xhr = new XMLHttpRequest();
  xhr.open('POST', '/cgi-bin/deck.py', true);
  xhr.setRequestHeader('PASSWORD', password);
  xhr.onreadystatechange = function () {
    if (xhr.readyState === XMLHttpRequest.DONE) {
      if (xhr.status < 200 || xhr.status >= 300) {
        reportException(xhr.statusText);
      }
    }
  };
  xhr.send(JSON.stringify(window.allCards, null, 2));

  const inputButton = document.getElementById('cards-input');

  const saveButton = document.createElement('button');
  saveButton.textContent = "Save JSON";

  saveButton.addEventListener('click', () => {
    // We move the logic inside the click listener so that it
    // always saves the CURRENT state of 'obj' if it has changed.
    const jsonString = JSON.stringify(obj, null, 2);
    const blob = new Blob([jsonString], { type: 'application/json' });
    const url = URL.createObjectURL(blob);

    // Create a "ghost" anchor to trigger the download
    const a = document.createElement('a');
    a.href = url;
    a.download = 'data.json';

    // Append to body, click it, and remove it immediately
    document.body.appendChild(a);
    a.click();
    document.body.removeChild(a);

    //  Clean up the URL object to free up memory
    URL.revokeObjectURL(url);
  });

  inputButton.parentNode.insertBefore(saveButton, inputButton);
}