window.BackOneAddons = window.BackOneAddons || {};

window.BackOneAddons.voice = function voiceAddon() {
  let pc = null;
  let picker = null;
  let selectedPeer = null;
  let inCall = false;
  let localStream = null;
  let micEnabled = true;
  let root = null;

  function updateConnectionBar() {
    const bar = root?.querySelector('#voice-conn-bar');
    if (!bar || !window.BackOneCommLayout) return;
    bar.innerHTML = BackOneCommLayout.connectionBarHtml(
      selectedPeer,
      BackOneNetworkSession.getActiveNetwork()
    );
  }

  function updateHeadStatus() {
    const statusEl = root?.querySelector('#voice-head-status');
    const breadcrumb = root?.querySelector('#voice-breadcrumb-peer');
    if (!statusEl) return;
    if (inCall && selectedPeer) {
      statusEl.innerHTML = `<span class="connected">Connected</span> · ${selectedPeer.latency != null ? selectedPeer.latency + 'ms' : '—'}`;
      if (breadcrumb) breadcrumb.textContent = selectedPeer.peerId;
    } else if (selectedPeer) {
      statusEl.textContent = 'Ready';
      if (breadcrumb) breadcrumb.textContent = selectedPeer.peerId;
    } else {
      statusEl.textContent = '';
      if (breadcrumb) breadcrumb.textContent = '—';
    }
  }

  function updateCallButtons() {
    const callBtn = root?.querySelector('#voice-call');
    if (callBtn) callBtn.disabled = !selectedPeer || !BackOneNetworkSession.getNetworkId() || inCall;
    const selectedLabel = root?.querySelector('#voice-selected-label');
    if (selectedLabel) {
      selectedLabel.innerHTML = selectedPeer
        ? `Selected: <strong>${selectedPeer.peerId.slice(0, 10)}…</strong>`
        : 'Selected: <strong>—</strong>';
    }
    updateHeadStatus();
    updateConnectionBar();
  }

  function hangUp() {
    if (pc) { pc.close(); pc = null; }
    if (localStream) {
      localStream.getTracks().forEach(t => t.stop());
      localStream = null;
    }
    inCall = false;
    micEnabled = true;
    updateCallButtons();
    window.BackOneRingingPopup?.dismiss();
  }

  return {
    mount(container) {
      root = container;
      container.innerHTML = `
        <div class="comm-layout">
          <aside class="comm-sidebar">
            <div class="comm-sidebar-head">
              <h2>Voice Call P2P</h2>
              <p class="comm-sidebar-sub">BackOne core · same network as backone-cli</p>
            </div>
            <div class="comm-sidebar-body">
              <div id="voice-picker"></div>
            </div>
            <div class="comm-sidebar-actions">
              <div id="voice-selected-label" class="comm-selected-label">Selected: <strong>—</strong></div>
              <button type="button" id="voice-call" class="btn-primary" disabled>Voice Call</button>
              <button type="button" id="voice-hangup" class="btn-secondary">Hang Up</button>
            </div>
          </aside>
          <div class="comm-main">
            <div class="comm-main-head">
              <div class="comm-breadcrumb">Voice Call P2P &gt; <span id="voice-breadcrumb-state">Select peer</span> <strong id="voice-breadcrumb-peer">—</strong></div>
              <div id="voice-head-status" class="comm-head-status"></div>
            </div>
            <div class="comm-stage">
              <div class="voice-stage-inner">
                <div class="avatar">🎙</div>
                <div class="peer-id" id="voice-ph-peer">—</div>
                <div id="voice-stage-label">Select a peer to call</div>
              </div>
              <div class="comm-call-controls">
                <button type="button" id="voice-mic">Mic</button>
                <button type="button" id="voice-hangup-stage" class="danger">Hang Up</button>
              </div>
            </div>
          </div>
        </div>
        <div id="voice-conn-bar" class="comm-connection-bar"></div>`;

      const callBtn = container.querySelector('#voice-call');
      const stageLabel = container.querySelector('#voice-stage-label');

      picker = BackOnePeerPicker(container.querySelector('#voice-picker'), {
        layout: 'sidebar',
        showActionButton: false,
        onSelect(peer) {
          selectedPeer = peer;
          root.querySelector('#voice-ph-peer').textContent = peer.peerId;
          if (!inCall) stageLabel.textContent = `Ready to call ${peer.displayName || peer.peerId}`;
          updateCallButtons();
        },
        onNetworkChange() {
          if (!inCall) selectedPeer = null;
          updateCallButtons();
        }
      });

      BackOneNetworkSession.subscribe(() => updateCallButtons());

      callBtn.onclick = async () => {
        const peer = selectedPeer || picker.getSelectedPeer();
        const networkId = BackOneNetworkSession.getNetworkId();
        if (!peer || !networkId) return;
        try {
          pc = new RTCPeerConnection();
          localStream = await navigator.mediaDevices.getUserMedia({ audio: true, video: false });
          localStream.getTracks().forEach(t => pc.addTrack(t, localStream));
          const offer = await pc.createOffer();
          await pc.setLocalDescription(offer);
          await BackOneAuth.fetchWithAuth('/controller/comms/call', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({
              type: 'voice',
              networkId,
              targetId: peer.peerId,
              sdp: offer.sdp
            })
          });
          inCall = true;
          root.querySelector('#voice-breadcrumb-state').textContent = 'Connected to';
          stageLabel.textContent = `In call with ${peer.displayName || peer.peerId}`;
          updateCallButtons();
        } catch (err) {
          hangUp();
          alert(err.message || 'Call failed');
        }
      };

      container.querySelector('#voice-hangup').onclick = hangUp;
      container.querySelector('#voice-hangup-stage').onclick = hangUp;

      container.querySelector('#voice-mic').onclick = () => {
        if (!localStream) return;
        micEnabled = !micEnabled;
        localStream.getAudioTracks().forEach(t => { t.enabled = micEnabled; });
        container.querySelector('#voice-mic').textContent = micEnabled ? 'Mic' : 'Mic off';
      };

      updateCallButtons();
    }
  };
};