import { isNewBookLoggedIn } from '../newbook-auth.js';

// Same regex as background.js — re-derived independently here from the live
// tab URL each time the popup opens (rather than trusting chrome.storage
// left over from the background script) so a stale badge state can never
// show a booking that isn't actually the one currently open. Confirmed
// 2026-09-01 by the user directly (real NewBook page URLs).
const BOOKING_URL_RE = /\/bookings_(?:view|edit|checkin)\/(\d+)/i;

const contentEl = document.getElementById('content');
const nbStatusEl = document.getElementById('nbStatus');

async function main() {
  const [tab] = await chrome.tabs.query({ active: true, currentWindow: true });
  const bookingMatch = tab?.url?.match(BOOKING_URL_RE);
  const bookingId = bookingMatch ? bookingMatch[1] : null;

  isNewBookLoggedIn().then(ok => {
    nbStatusEl.textContent = ok ? 'NewBook: signed in' : 'NewBook: not detected';
    nbStatusEl.className = `nb-status ${ok ? 'ok' : 'no'}`;
  });

  const { baseUrl, apiKey, defaultDeviceId } = await chrome.storage.local.get(['baseUrl', 'apiKey', 'defaultDeviceId']);
  if (!baseUrl || !apiKey) {
    contentEl.innerHTML = `
      <p class="muted">Not set up yet — add the tablet-checkin URL and a terminal API key first.</p>
      <a class="settings-link" href="#" id="openSettings">Open Settings</a>
    `;
    document.getElementById('openSettings').addEventListener('click', e => {
      e.preventDefault();
      chrome.runtime.openOptionsPage();
    });
    return;
  }

  // Three independent sections: tablet status + reset is always shown (not
  // gated on a booking being open) so reception can clear a stuck-busy
  // tablet from the terminal without needing to be on a booking page at all;
  // arrivals is likewise always shown — it's the alternative route to a push
  // for when reception isn't on a booking page either, picking the guest
  // from today's list instead of from NewBook itself.
  contentEl.innerHTML = `<div id="tabletsSection"></div><div id="arrivalsSection"></div><div id="bookingSection"></div>`;
  const tabletsEl = document.getElementById('tabletsSection');
  const arrivalsEl = document.getElementById('arrivalsSection');
  const bookingEl = document.getElementById('bookingSection');

  let devices = [];
  try {
    const res = await fetch(`${baseUrl}/api/staff/devices`, {
      headers: { Authorization: `Bearer ${apiKey}` },
    });
    if (!res.ok) throw new Error((await res.json().catch(() => ({}))).error || `HTTP ${res.status}`);
    devices = await res.json();
  } catch (err) {
    tabletsEl.innerHTML = `<p class="muted">Could not reach tablet-checkin: ${escapeHtml(err.message)}</p>`;
    return;
  }

  renderTablets(tabletsEl, devices, baseUrl, apiKey);
  loadArrivals(arrivalsEl, devices, defaultDeviceId, baseUrl, apiKey);

  if (!bookingId) {
    bookingEl.innerHTML = `<p class="muted">Open a booking in NewBook to send it to a check-in tablet.</p>`;
    return;
  }

  renderBooking(bookingEl, bookingId, devices, defaultDeviceId, baseUrl, apiKey);
}

async function loadArrivals(el, devices, defaultDeviceId, baseUrl, apiKey) {
  el.innerHTML = `<p class="section-label">Today's Arrivals</p><p class="muted">Loading…</p>`;
  let arrivals;
  try {
    const res = await fetch(`${baseUrl}/api/staff/arrivals`, {
      headers: { Authorization: `Bearer ${apiKey}` },
    });
    if (!res.ok) throw new Error((await res.json().catch(() => ({}))).error || `HTTP ${res.status}`);
    arrivals = await res.json();
  } catch (err) {
    el.innerHTML = `<p class="section-label">Today's Arrivals</p><p class="muted">Could not load: ${escapeHtml(err.message)}</p>`;
    return;
  }
  renderArrivals(el, arrivals, devices, defaultDeviceId, baseUrl, apiKey);
}

function renderArrivals(el, arrivals, devices, defaultDeviceId, baseUrl, apiKey) {
  if (!arrivals.length) {
    el.innerHTML = `<p class="section-label">Today's Arrivals</p><p class="muted">No arrivals today.</p>`;
    return;
  }

  el.innerHTML = `
    <p class="section-label">Today's Arrivals</p>
    <ul class="arrival-list">
      ${arrivals.map(a => `
        <li class="arrival-row">
          <div class="arrival-info">
            <span class="arrival-name">${escapeHtml(a.guest_name)}</span>
            ${a.site_name ? `<span class="arrival-site">${escapeHtml(a.site_name)}</span>` : ''}
          </div>
          ${a.checked_in
            ? `<span class="arrival-done">Checked in</span>`
            : `<button type="button" class="push-btn" data-booking="${a.booking_id}">Push</button>`}
          <div class="arrival-msg"></div>
        </li>
      `).join('')}
    </ul>
  `;

  el.querySelectorAll('.push-btn').forEach(btn => {
    btn.addEventListener('click', () => handleArrivalPush(btn, devices, defaultDeviceId, baseUrl, apiKey));
  });
}

// Mirrors renderBooking's own fast-path/picker split (straight to the
// default tablet when it's free, a manual picker when it isn't or there's
// none), just scoped to this one row instead of the whole popup — several
// of these can be mid-send at once across different arrivals.
async function handleArrivalPush(btn, devices, defaultDeviceId, baseUrl, apiKey) {
  const row = btn.closest('.arrival-row');
  const bookingId = btn.dataset.booking;
  const msgEl = row.querySelector('.arrival-msg');
  const defaultDevice = devices.find(d => d.device_id === defaultDeviceId);

  if (defaultDevice && defaultDevice.status !== 'busy') {
    btn.disabled = true;
    btn.textContent = '…';
    const result = await sendPush(bookingId, defaultDevice.device_id, baseUrl, apiKey);
    if (result.ok && result.delivered !== false) {
      btn.remove();
      setMsg(msgEl, 'Sent', 'ok');
      return;
    }
    if (result.ok) {
      setMsg(msgEl, 'Not connected — choose another:', 'warn');
    } else if (result.status === 409) {
      setMsg(msgEl, 'Busy — choose another:', 'warn');
    } else {
      btn.disabled = false;
      btn.textContent = 'Push';
      setMsg(msgEl, `Failed: ${result.error}`, 'error');
      return;
    }
  }

  showArrivalPicker(row, bookingId, devices, defaultDeviceId, baseUrl, apiKey);
}

function showArrivalPicker(row, bookingId, devices, defaultDeviceId, baseUrl, apiKey) {
  row.querySelector('.push-btn')?.remove();
  const msgEl = row.querySelector('.arrival-msg');

  if (!devices.length) {
    setMsg(msgEl, 'No tablets registered yet', 'error');
    return;
  }

  const picker = document.createElement('div');
  picker.className = 'arrival-picker';
  picker.innerHTML = `
    <select>
      ${devices.map(d => `<option value="${d.device_id}" ${d.status === 'busy' ? 'disabled' : ''}>${escapeHtml(d.name)}${d.status === 'busy' ? ' (busy)' : ''}</option>`).join('')}
    </select>
    <button type="button" class="send-small">Send</button>
  `;
  row.appendChild(picker);
  const select = picker.querySelector('select');
  if (defaultDeviceId) select.value = defaultDeviceId;

  picker.querySelector('.send-small').addEventListener('click', async () => {
    const sendBtn = picker.querySelector('.send-small');
    sendBtn.disabled = true;
    const result = await sendPush(bookingId, select.value, baseUrl, apiKey);
    if (result.ok && result.delivered !== false) {
      picker.remove();
      setMsg(msgEl, 'Sent', 'ok');
    } else if (result.ok) {
      setMsg(msgEl, 'Sent, but that tablet isn’t connected right now', 'warn');
      sendBtn.disabled = false;
    } else {
      setMsg(msgEl, result.error || 'Failed', 'error');
      sendBtn.disabled = false;
    }
  });
}

function renderTablets(el, devices, baseUrl, apiKey) {
  if (!devices.length) {
    el.innerHTML = `<p class="muted">No tablets registered yet</p>`;
    return;
  }

  el.innerHTML = `
    <p class="section-label">Tablets</p>
    <ul class="device-list">
      ${devices.map(d => `
        <li class="device-row">
          <span class="device-name">${escapeHtml(d.name)}</span>
          <span class="device-status ${d.status}">${escapeHtml(d.status)}</span>
          ${d.status === 'busy' ? `<button type="button" class="reset-btn" data-device="${d.device_id}">Reset</button>` : ''}
        </li>
      `).join('')}
    </ul>
  `;

  el.querySelectorAll('.reset-btn').forEach(btn => {
    btn.addEventListener('click', async () => {
      btn.disabled = true;
      btn.textContent = '…';
      try {
        const res = await fetch(`${baseUrl}/api/staff/devices/${btn.dataset.device}/reset`, {
          method: 'POST',
          headers: { Authorization: `Bearer ${apiKey}` },
        });
        if (!res.ok) throw new Error((await res.json().catch(() => ({}))).error || `HTTP ${res.status}`);
        // Simplest way to get the tablet list (and any in-flight booking
        // auto-send, which depends on device status) back in sync — reload
        // the whole popup rather than hand-patching multiple sections.
        main();
      } catch (err) {
        btn.disabled = false;
        btn.textContent = 'Reset';
        alert(`Reset failed: ${err.message}`);
      }
    });
  });
}

function renderBooking(el, bookingId, devices, defaultDeviceId, baseUrl, apiKey) {
  const defaultDevice = devices.find(d => d.device_id === defaultDeviceId);

  if (defaultDevice && defaultDevice.status !== 'busy') {
    // Straight to pushing, no extra click — matches the injected row/banner
    // buttons' behaviour (see content-script.js's handleSendClick). "Send to
    // a different tablet instead" stays one click away below in case the
    // default is wrong for this particular booking.
    el.innerHTML = `
      <p class="booking">Booking <strong>#${bookingId}</strong></p>
      <div id="msg" class="msg warn">Sending to ${escapeHtml(defaultDevice.name)}…</div>
      <a href="#" class="settings-link" id="changeTablet">Send to a different tablet instead</a>
    `;
    document.getElementById('changeTablet').addEventListener('click', e => {
      e.preventDefault();
      renderPicker(el, bookingId, devices, defaultDeviceId, baseUrl, apiKey);
    });

    sendPush(bookingId, defaultDevice.device_id, baseUrl, apiKey).then(result => {
      const msgEl = document.getElementById('msg');
      if (!msgEl) return; // "Send to a different tablet" was clicked before this resolved

      if (result.ok && result.delivered !== false) {
        setMsg(msgEl, 'Sent — the tablet should navigate now.', 'ok');
      } else if (result.ok) {
        // Session created server-side but nothing's actually listening on
        // that device right now — same "needs a human decision" case as
        // busy, so offer the picker rather than a dead-end message.
        renderPicker(el, bookingId, devices, defaultDeviceId, baseUrl, apiKey, 'Default tablet isn’t connected — choose another:');
      } else if (result.status === 409) {
        // Default went busy in the moment between loading the popup and
        // sending — fall back to the manual picker rather than leaving the
        // guest on a dead-end message.
        renderPicker(el, bookingId, devices, defaultDeviceId, baseUrl, apiKey, 'Default tablet is busy — choose another:');
      } else {
        setMsg(msgEl, `Failed: ${result.error}`, 'error');
      }
    });
    return;
  }

  renderPicker(el, bookingId, devices, defaultDeviceId, baseUrl, apiKey);
}

function renderPicker(el, bookingId, devices, defaultDeviceId, baseUrl, apiKey, note = '') {
  if (!devices.length) {
    el.innerHTML = `<p class="booking">Booking <strong>#${bookingId}</strong></p><p class="muted">No tablets registered yet</p>`;
    return;
  }

  el.innerHTML = `
    <p class="booking">Booking <strong>#${bookingId}</strong></p>
    ${note ? `<p class="msg warn">${escapeHtml(note)}</p>` : ''}
    <select id="device">
      ${devices.map(d => `<option value="${d.device_id}" ${d.status === 'busy' ? 'disabled' : ''}>${escapeHtml(d.name)}${d.status === 'busy' ? ' (busy)' : ''}</option>`).join('')}
    </select>
    <button class="primary" id="send">Send to Check-In Tablet</button>
    <div id="msg"></div>
  `;

  const deviceSelect = document.getElementById('device');
  const sendBtn = document.getElementById('send');
  const msgEl = document.getElementById('msg');
  // Setting .value to a disabled (busy) option is a no-op in every browser
  // that matters here, so a busy default just falls through to whatever the
  // browser's own first-enabled-option default would have been anyway.
  if (defaultDeviceId) deviceSelect.value = defaultDeviceId;

  sendBtn.addEventListener('click', async () => {
    sendBtn.disabled = true;
    setMsg(msgEl, 'Sending…', 'warn');
    const result = await sendPush(bookingId, deviceSelect.value, baseUrl, apiKey);
    if (result.ok) {
      if (result.delivered === false) {
        setMsg(msgEl, 'Sent, but that tablet isn’t connected right now — it’ll pick this up if it reconnects.', 'warn');
      } else {
        setMsg(msgEl, 'Sent — the tablet should navigate now.', 'ok');
      }
    } else if (result.status === 409) {
      setMsg(msgEl, result.error || 'That tablet is busy with another guest right now.', 'warn');
    } else {
      setMsg(msgEl, `Failed: ${result.error}`, 'error');
    }
    sendBtn.disabled = false;
  });
}

async function sendPush(bookingId, deviceId, baseUrl, apiKey) {
  try {
    const res = await fetch(`${baseUrl}/api/staff/push`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', Authorization: `Bearer ${apiKey}` },
      body: JSON.stringify({ booking_id: bookingId, device_id: deviceId }),
    });
    const body = await res.json().catch(() => ({}));
    if (!res.ok) return { ok: false, status: res.status, error: body.error || `HTTP ${res.status}` };
    return { ok: true, delivered: body.delivered };
  } catch (err) {
    return { ok: false, status: 0, error: err.message };
  }
}

function setMsg(el, text, kind) {
  el.textContent = text;
  el.className = `msg ${kind}`;
}

function escapeHtml(s) {
  const div = document.createElement('div');
  div.textContent = s;
  return div.innerHTML;
}

main();