/* ============================================================
   Bid Checker — app.js
   Global utilities: modals, tabs, auto-dismiss alerts, helpers
   ============================================================ */

'use strict';

/* ── Modal helpers ─────────────────────────────────────────── */
function openModal(id) {
  const el = document.getElementById(id);
  if (el) {
    el.classList.add('open');
    document.body.style.overflow = 'hidden';
    const firstInput = el.querySelector('input:not([type=hidden]), select, textarea');
    if (firstInput) setTimeout(() => firstInput.focus(), 120);
  }
}

function closeModal(id) {
  const el = document.getElementById(id);
  if (el) {
    el.classList.remove('open');
    document.body.style.overflow = '';
  }
}

// Close modal when clicking the backdrop (skips modals with data-no-backdrop-close)
document.addEventListener('click', (e) => {
  if (e.target.classList.contains('modal-overlay') && !e.target.hasAttribute('data-no-backdrop-close')) {
    e.target.classList.remove('open');
    document.body.style.overflow = '';
  }
});

// Close modal on Escape; trap Tab focus inside open modals
document.addEventListener('keydown', (e) => {
  if (e.key === 'Escape') {
    document.querySelectorAll('.modal-overlay.open').forEach(m => {
      m.classList.remove('open');
      document.body.style.overflow = '';
    });
    return;
  }

  if (e.key === 'Tab') {
    const openModal = document.querySelector('.modal-overlay.open');
    if (!openModal) return;
    const focusable = Array.from(openModal.querySelectorAll(
      'button:not([disabled]), [href], input:not([disabled]), select:not([disabled]), textarea:not([disabled]), [tabindex]:not([tabindex="-1"])'
    )).filter(el => el.offsetParent !== null);
    if (focusable.length === 0) return;
    const first = focusable[0];
    const last  = focusable[focusable.length - 1];
    if (e.shiftKey) {
      if (document.activeElement === first) { e.preventDefault(); last.focus(); }
    } else {
      if (document.activeElement === last)  { e.preventDefault(); first.focus(); }
    }
  }
});

/* ── Tab switching ─────────────────────────────────────────── */
function switchTab(tabId, groupId) {
  const group = groupId
    ? document.getElementById(groupId)
    : document.body;

  group.querySelectorAll('.tab-btn').forEach(b => b.classList.remove('active'));
  group.querySelectorAll('.tab-panel').forEach(p => p.classList.remove('active'));

  const btn = group.querySelector(`[data-tab="${tabId}"]`);
  const panel = document.getElementById(tabId);
  if (btn)   btn.classList.add('active');
  if (panel) panel.classList.add('active');
}

// Wire up tab buttons declared in HTML
document.addEventListener('DOMContentLoaded', () => {
  document.querySelectorAll('.tab-btn[data-tab]').forEach(btn => {
    btn.addEventListener('click', () => {
      const tabId  = btn.dataset.tab;
      const groupId = btn.dataset.group || null;
      switchTab(tabId, groupId);
    });
  });
});

/* ── Auto-dismiss flash messages ───────────────────────────── */
document.addEventListener('DOMContentLoaded', () => {
  document.querySelectorAll('.alert').forEach(alert => {
    setTimeout(() => {
      alert.style.transition = 'opacity 0.5s';
      alert.style.opacity = '0';
      setTimeout(() => alert.remove(), 500);
    }, 7000);
  });
});

/* ── Confirm-delete helper ─────────────────────────────────── */
function confirmDelete(message, formOrUrl) {
  if (!confirm(message || 'Are you sure you want to delete this item?')) return false;
  if (typeof formOrUrl === 'string') {
    window.location.href = formOrUrl;
  } else if (formOrUrl && formOrUrl.submit) {
    formOrUrl.submit();
  }
  return true;
}

/* ── Password visibility toggle ────────────────────────────── */
function togglePasswordVisibility(inputId, btn) {
  const input = document.getElementById(inputId);
  if (!input) return;
  if (input.type === 'password') {
    input.type = 'text';
    if (btn) btn.textContent = '🙈';
  } else {
    input.type = 'password';
    if (btn) btn.textContent = '👁';
  }
}

/* ── Dynamic credential rows (website form) ────────────────── */
function addCredentialRow(containerId) {
  const container = document.getElementById(containerId);
  if (!container) return;
  const index = container.querySelectorAll('.credential-entry').length;
  const row = document.createElement('div');
  row.className = 'credential-entry';
  row.innerHTML = `
    <div class="form-group">
      <label>Label</label>
      <input type="text" name="cred_label[]" placeholder="e.g. Admin Login">
    </div>
    <div class="form-group">
      <label>Username</label>
      <input type="text" name="cred_username[]" placeholder="username">
    </div>
    <div class="form-group">
      <label>Password</label>
      <input type="password" name="cred_password[]" placeholder="••••••••">
    </div>
    <div class="form-group">
      <label>&nbsp;</label>
      <button type="button" class="btn btn-danger btn-sm" onclick="this.closest('.credential-entry').remove()">✕</button>
    </div>
  `;
  container.appendChild(row);
}

/* ── Copy to clipboard ─────────────────────────────────────── */
function copyToClipboard(text, btn) {
  navigator.clipboard.writeText(text).then(() => {
    const original = btn ? btn.textContent : null;
    if (btn) { btn.textContent = '✓ Copied'; btn.disabled = true; }
    setTimeout(() => {
      if (btn) { btn.textContent = original; btn.disabled = false; }
    }, 2000);
  }).catch(() => {
    alert('Copy failed. Please copy manually.');
  });
}

/* ── Progress bar color logic ──────────────────────────────── */
function colorProgressBar(fill, pct) {
  fill.classList.remove('success', 'warning', 'danger');
  if (pct >= 100)     fill.classList.add('success');
  else if (pct >= 50) fill.classList.add('warning');
  else                fill.classList.add('danger');
}

document.addEventListener('DOMContentLoaded', () => {
  document.querySelectorAll('.progress-bar-fill[data-pct]').forEach(fill => {
    const pct = parseInt(fill.dataset.pct, 10);
    fill.style.width = pct + '%';
    colorProgressBar(fill, pct);
  });
});

/* ── Session timeout warning ───────────────────────────────── */
(function sessionWarning() {
  const WARN_BEFORE_MS = 5 * 60 * 1000;
  const SESSION_MS     = 30 * 60 * 1000;

  var warningTimer = null, expireTimer = null, countdownInterval = null;
  var _lastPing = 0;

  function isWarningShowing() {
    var m = document.getElementById('modal-session-warning');
    return m && m.classList.contains('open');
  }

  function clearCountdown() {
    if (countdownInterval) { clearInterval(countdownInterval); countdownInterval = null; }
  }

  function startCountdown() {
    var remaining = Math.round(WARN_BEFORE_MS / 1000);
    var el = document.getElementById('session-countdown');
    clearCountdown();
    countdownInterval = setInterval(function() {
      remaining--;
      if (el) {
        var m = Math.floor(remaining / 60), s = remaining % 60;
        el.textContent = m + ':' + (s < 10 ? '0' : '') + s;
      }
      if (remaining <= 0) { clearCountdown(); window.location.href = '/login'; }
    }, 1000);
  }

  function resetTimers() {
    var now = Date.now();
    clearTimeout(warningTimer); clearTimeout(expireTimer); clearCountdown();
    if (isWarningShowing()) closeModal('modal-session-warning');
    // Ping the server at most once per minute so the server-side session
    // stays alive while the user is active on the page.
    if (now - _lastPing > 60000) {
      _lastPing = now;
      fetch('/ping', { credentials: 'same-origin' }).catch(function(){});
    }

    warningTimer = setTimeout(function() {
      openModal('modal-session-warning');
      startCountdown();
    }, SESSION_MS - WARN_BEFORE_MS);

    expireTimer = setTimeout(function() {
      window.location.href = '/login';
    }, SESSION_MS);
  }

  document.addEventListener('DOMContentLoaded', function() {
    var btn = document.getElementById('btn-stay-logged-in');
    if (btn) btn.addEventListener('click', function() {
      fetch('/ping', { credentials: 'same-origin' }).catch(function(){});
      resetTimers();
    });
  });

  ['click', 'keydown', 'mousemove', 'scroll', 'touchstart'].forEach(function(evt) {
    document.addEventListener(evt, function() {
      if (!isWarningShowing()) resetTimers();
    }, { passive: true });
  });

  resetTimers();
})();

/* ── CSRF helper (reads meta tag set by Flask) ─────────────── */
function getCsrfToken() {
  const meta = document.querySelector('meta[name="csrf-token"]');
  return meta ? meta.content : '';
}

/* ── Auto-inject CSRF token into every static POST form ─────── */
/* Called immediately — app.js is at the end of <body> so all   */
/* forms are already in the DOM when this executes.             */
(function injectCsrf() {
  const token = getCsrfToken();
  if (!token) return;
  document.querySelectorAll('form').forEach(function(form) {
    if ((form.getAttribute('method') || '').toLowerCase() !== 'post') return;
    if (form.querySelector('input[name="csrf_token"]')) return;
    const input = document.createElement('input');
    input.type  = 'hidden';
    input.name  = 'csrf_token';
    input.value = token;
    form.appendChild(input);
  });
}());

/* ── Mobile sidebar toggle ─────────────────────────────────── */
(function() {
  var toggle   = document.getElementById('sidebar-toggle');
  var backdrop = document.getElementById('sidebar-backdrop');
  var sidebar  = document.getElementById('sidebar');
  if (!toggle || !sidebar) return;

  function openSidebar() {
    sidebar.classList.add('open');
    backdrop.classList.add('open');
    document.body.style.overflow = 'hidden';
    toggle.setAttribute('aria-expanded', 'true');
    toggle.setAttribute('aria-label', 'Close navigation');
  }
  function closeSidebar() {
    sidebar.classList.remove('open');
    backdrop.classList.remove('open');
    document.body.style.overflow = '';
    toggle.setAttribute('aria-expanded', 'false');
    toggle.setAttribute('aria-label', 'Open navigation');
  }

  toggle.addEventListener('click', openSidebar);
  backdrop.addEventListener('click', closeSidebar);
  sidebar.querySelectorAll('.nav-item').forEach(function(link) {
    link.addEventListener('click', closeSidebar);
  });
}());

/* ── Relative timestamps ───────────────────────────────────── */
function timeAgo(dateStr) {
  if (!dateStr) return '—';
  var d    = new Date(dateStr.replace(' ', 'T'));
  var diff = Math.round((Date.now() - d.getTime()) / 1000);
  if (diff < 60)     return 'just now';
  if (diff < 3600)   return Math.floor(diff / 60) + ' min ago';
  if (diff < 86400)  return Math.floor(diff / 3600) + ' hr ago';
  if (diff < 604800) return Math.floor(diff / 86400) + ' days ago';
  return d.toLocaleDateString();
}

document.addEventListener('DOMContentLoaded', function() {
  document.querySelectorAll('[data-ts]').forEach(function(el) {
    var iso = el.dataset.ts;
    if (!iso) return;
    el.title = el.textContent.trim();
    el.textContent = timeAgo(iso);
  });
});

/* ── HTML escape (safe for attributes and text nodes) ──────── */
function esc(str) {
  return String(str || '').replace(/[&<>"']/g, function(c) {
    return {'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'}[c];
  });
}

/* ── Generic fetch-based form submit (JSON response) ───────── */
async function submitJson(url, data, method = 'POST') {
  const res = await fetch(url, {
    method,
    headers: {
      'Content-Type': 'application/json',
      'X-Requested-With': 'XMLHttpRequest',
      'X-CSRFToken': getCsrfToken(),
    },
    body: JSON.stringify(data),
    credentials: 'same-origin',
  });
  return res.json();
}