/**
 * Connection page — connect form with localStorage persistence.
 */
function ConnectPage(params, container) {
  var html =
    '<div class="row">' +
      '<div class="offset-md-4 col-md-6" style="margin-top: 128px">' +
        '<div class="card p-4 mb-4">' +
          '<h2>Connect</h2>' +
          '<div class="alert alert-danger" id="connect-error" style="display:none"></div>' +
          '<p>Enter the address (including rcon port) and the rcon password below to connect.</p>' +
          '<form id="connect-form">' +
            '<div class="mb-3">' +
              '<label for="connection-address" class="form-label">Address</label>' +
              '<input required minlength="5" id="connection-address" class="form-control" placeholder="xxx.xxx.xxx.xxx:28016">' +
            '</div>' +
            '<div class="mb-3">' +
              '<label for="connection-password" class="form-label">Password</label>' +
              '<input required minlength="2" type="password" id="connection-password" class="form-control">' +
            '</div>' +
            '<div class="form-check float-end">' +
              '<input type="checkbox" class="form-check-input" id="connection-save" checked>' +
              '<label class="form-check-label" for="connection-save">Save Connection</label>' +
            '</div>' +
            '<button type="submit" class="btn btn-primary w-100">Connect</button>' +
          '</form>' +
        '</div>' +
        '<div class="card p-4">' +
          '<div id="saved-connections"></div>' +
        '</div>' +
      '</div>' +
    '</div>';

  container.innerHTML = html;

  var addrInput = document.getElementById('connection-address');
  var passInput = document.getElementById('connection-password');
  var saveCheck = document.getElementById('connection-save');
  var errorDiv = document.getElementById('connect-error');
  var savedDiv = document.getElementById('saved-connections');
  var connectionsLimit = 5;

  function loadConnections() {
    try { return JSON.parse(localStorage.previousConnections || '[]'); }
    catch (e) { return []; }
  }

  function saveConnections(conns) {
    localStorage.previousConnections = JSON.stringify(conns);
  }

  function showError(msg) {
    errorDiv.textContent = msg;
    errorDiv.style.display = 'block';
  }

  function hideError() { errorDiv.style.display = 'none'; }

  function addConnection(addr, pass) {
    var conns = loadConnections();
    conns = conns.filter(function (c) { return c.Address !== addr; });
    conns.push({ Address: addr, Password: pass, date: new Date().toISOString() });
    saveConnections(conns);
  }

  function doConnect(addr, pass) {
    hideError();
    Rcon.connect(addr, pass);
  }

  function renderSaved() {
    var conns = loadConnections();
    if (conns.length === 0) { savedDiv.innerHTML = ''; return; }
    var display = conns.slice().reverse();
    var shown = connectionsLimit || display.length;
    var h = '<h2>Saved Connections</h2><ul>';
    for (var i = 0; i < Math.min(shown, display.length); i++) {
      var c = display[i];
      h += '<li><a href="#" class="saved-conn" data-addr="' + c.Address + '" data-pass="' + c.Password + '">' + c.Address + '</a> — ' + new Date(c.date).toLocaleString() + '</li>';
    }
    h += '</ul>';
    if (conns.length > 5) {
      h += '<button type="button" class="btn btn-primary btn-block" id="toggle-conn-limit">Show ' + (connectionsLimit ? 'more' : 'less') + '</button>';
    }
    savedDiv.innerHTML = h;

    var links = savedDiv.querySelectorAll('.saved-conn');
    for (var j = 0; j < links.length; j++) {
      links[j].addEventListener('click', function (e) {
        e.preventDefault();
        doConnect(this.dataset.addr, this.dataset.pass);
      });
    }
    var toggle = document.getElementById('toggle-conn-limit');
    if (toggle) {
      toggle.addEventListener('click', function () {
        connectionsLimit = connectionsLimit ? undefined : 5;
        renderSaved();
      });
    }
  }

  document.getElementById('connect-form').addEventListener('submit', function (e) {
    e.preventDefault();
    var addr = addrInput.value.trim();
    var pass = passInput.value.trim();
    if (!addr || !pass) return;
    if (saveCheck.checked) addConnection(addr, pass);
    doConnect(addr, pass);
  });

  function onConnected() {
    // Navigation handled by app.js — don't set hash here
  }
  function onDisconnected(ev) {
    showError('Connection was closed — Error ' + (ev ? ev.code : 'unknown'));
  }

  Rcon.on('connected', onConnected);
  Rcon.on('disconnected', onDisconnected);
  renderSaved();

  // Auto-connect from URL — check hash for address and password
  var hash = window.location.hash;
  var pwMatch = hash.match(/[?&]password=([^&]+)/);
  if (pwMatch) {
    passInput.value = decodeURIComponent(pwMatch[1]);
    window.location.hash = hash.replace(/[?&]password=[^&]+/, '');
  }
  var addrMatch = hash.match(/^#\/([^/]+)\//);
  if (addrMatch) addrInput.value = addrMatch[1];

  if (addrInput.value && passInput.value) {
    if (saveCheck.checked) addConnection(addrInput.value.trim(), passInput.value.trim());
    doConnect(addrInput.value.trim(), passInput.value.trim());
  }

  return function cleanup() {
    Rcon.off('connected', onConnected);
    Rcon.off('disconnected', onDisconnected);
  };
}