/* ============================================================
   BAN YARO — Freunde
   ============================================================ */

window.Page_friends = (() => {

  let _container  = null;
  let _appState   = null;
  let _searchTimer = null;

  // ----------------------------------------------------------
  async function init(container, appState, params = {}) {
    _container = container;
    _appState  = appState;
    _render(params.suche || null);
  }

  function refresh() { _loadFriends(); }
  function onDogChange() {}

  // ----------------------------------------------------------
  // HAUPT-RENDER
  // ----------------------------------------------------------
  function _render(prefill = null) {
    if (!_appState.user) {
      _container.innerHTML = UI.emptyState({
        icon:   UI.icon('users'),
        title:  'Anmelden erforderlich',
        text:   'Melde dich an, um Freunde zu finden und Anfragen zu verwalten.',
        action: `<button class="btn btn-primary" data-page="settings">Anmelden</button>`,
      });
      return;
    }

    const myName = _appState?.user?.name || '';
    const myLink = `${location.origin}/#friends?suche=${encodeURIComponent(myName)}`;

    _container.innerHTML = `
      <div>

        <!-- Mein Freundes-Link -->
        <div class="card" style="margin-bottom:var(--space-5);padding:var(--space-4)">
          <div style="display:flex;align-items:center;gap:var(--space-3);margin-bottom:var(--space-3)">
            <div style="width:36px;height:36px;border-radius:50%;flex-shrink:0;
                        background:var(--c-primary-subtle);
                        display:flex;align-items:center;justify-content:center">
              <svg style="fill:currentColor;width:18px;height:18px;color:var(--c-primary)" aria-hidden="true">
                <use href="/icons/phosphor.svg#link"></use>
              </svg>
            </div>
            <div>
              <div style="font-size:var(--text-sm);font-weight:var(--weight-semibold);
                           color:var(--c-text)">Dein Freundes-Link</div>
              <div class="text-xs-secondary">
                Teile ihn — der andere tippt drauf und findet dich sofort.
              </div>
            </div>
          </div>
          <div class="flex-gap-2">
            <div style="flex:1;padding:var(--space-2) var(--space-3);
                        background:var(--c-surface-2);border-radius:var(--radius-md);
                        font-size:var(--text-xs);color:var(--c-text-secondary);
                        overflow:hidden;text-overflow:ellipsis;white-space:nowrap">
              banyaro.app/#friends?suche=${UI.escape(encodeURIComponent(myName))}
            </div>
            <button class="btn btn-ghost btn-sm" id="fr-copy-btn" title="Link kopieren">
              <svg class="ph-icon" aria-hidden="true"><use href="/icons/phosphor.svg#link"></use></svg>
            </button>
            <button class="btn btn-primary btn-sm" id="fr-share-btn" title="Link teilen">
              <svg class="ph-icon" aria-hidden="true"><use href="/icons/phosphor.svg#paper-plane-tilt"></use></svg>
              Teilen
            </button>
          </div>
        </div>

        <!-- Suche -->
        <div style="position:relative;margin-bottom:var(--space-2)">
          <svg class="ph-icon" style="position:absolute;left:var(--space-3);top:50%;
               transform:translateY(-50%);color:var(--c-text-muted);pointer-events:none"
               aria-hidden="true">
            <use href="/icons/phosphor.svg#magnifying-glass"></use>
          </svg>
          <input id="fr-search" type="search" autocomplete="off"
                 placeholder="Namen eines Hundebesitzers suchen…"
                 value="${UI.escape(prefill || '')}"
                 style="width:100%;box-sizing:border-box;
                        padding:var(--space-3) var(--space-3) var(--space-3) 2.5rem;
                        border:1.5px solid var(--c-border);border-radius:var(--radius-lg);
                        font-size:var(--text-sm);font-family:inherit;
                        background:var(--c-surface);color:var(--c-text)">
        </div>
        <p style="font-size:var(--text-xs);color:var(--c-text-muted);
                  margin:0 0 var(--space-4) var(--space-1)">
          Tipp: Lass dir den Freundes-Link einer anderen Person schicken — dann klappt die Suche automatisch.
        </p>
        <div id="fr-search-results"></div>

        <!-- Eingehende Anfragen -->
        <div id="fr-incoming"></div>

        <!-- Ausstehende Anfragen -->
        <div id="fr-outgoing"></div>

        <!-- Freundesliste -->
        <div id="fr-list"></div>

        <!-- Aktivitäten-Feed -->
        <div id="fr-activity"></div>

      </div>
    `;

    // Copy-Button
    _container.querySelector('#fr-copy-btn')?.addEventListener('click', () => {
      navigator.clipboard.writeText(myLink).then(() => {
        UI.toast.success('Link kopiert!');
      }).catch(() => {
        UI.toast.info('Link: ' + myLink);
      });
    });

    // Share-Button (Web Share API, Fallback: Copy)
    _container.querySelector('#fr-share-btn')?.addEventListener('click', async () => {
      if (navigator.share) {
        try {
          await navigator.share({
            title: `${myName} auf Ban Yaro`,
            text:  `Füge mich auf Ban Yaro als Freund hinzu!`,
            url:   myLink,
          });
        } catch { /* abgebrochen */ }
      } else {
        navigator.clipboard.writeText(myLink).then(() => {
          UI.toast.success('Link kopiert!');
        });
      }
    });

    // Suche
    const searchInput = _container.querySelector('#fr-search');
    searchInput.addEventListener('input', e => {
      clearTimeout(_searchTimer);
      const q = e.target.value.trim();
      if (q.length < 2) {
        _container.querySelector('#fr-search-results').innerHTML = '';
        return;
      }
      _searchTimer = setTimeout(() => _doSearch(q), 380);
    });

    // Delegierter Click-Handler — robust auch unter strikter CSP / für
    // dynamisch nachgerenderte Buttons (Anfragen, Freundesliste).
    // Ersetzt Inline-onclick, das auf manchen iOS-PWA-Sessions nicht feuerte.
    _container.addEventListener('click', e => {
      const btn = e.target.closest('[data-fr-action]');
      if (!btn) return;
      const id = parseInt(btn.dataset.frId, 10);
      switch (btn.dataset.frAction) {
        case 'accept':  _accept(id);  break;
        case 'decline': _decline(id); break;
        case 'cancel':  _cancel(id);  break;
        case 'chat':    _openChat(id); break;
      }
    });

    // Prefill aus URL-Parameter → sofort suchen
    if (prefill && prefill.length >= 2) {
      _doSearch(prefill);
    }

    _loadFriends();
  }

  // ----------------------------------------------------------
  // DATEN LADEN
  // ----------------------------------------------------------
  async function _loadFriends() {
    if (!_appState.user) return;
    try {
      const data = await API.friends.list();
      _renderIncoming(data.incoming || []);
      _renderOutgoing(data.outgoing || []);
      _renderFriends(data.friends   || []);
      _updateBadge((data.incoming || []).length);
    } catch { /* silent — 401 bei abgemeldeter Session */ }
    _loadActivity();
  }

  async function _loadActivity() {
    if (!_appState.user) return;
    const el = _container.querySelector('#fr-activity');
    if (!el) return;

    // Ladeindikator
    el.innerHTML = `
      <div style="margin-top:var(--space-6)">
        <div class="by-section-label">Aktivitäten</div>
        <div style="text-align:center;padding:var(--space-6) 0;color:var(--c-text-muted);
                    font-size:var(--text-sm)">
          <svg class="ph-icon" style="width:20px;height:20px;animation:spin 1s linear infinite"
               aria-hidden="true"><use href="/icons/phosphor.svg#spinner"></use></svg>
        </div>
      </div>
    `;

    try {
      const items = await API.friends.activity();
      _renderActivity(items || []);
    } catch {
      el.innerHTML = '';
    }
  }

  let _activityFilter = 'alle';
  let _activityAll    = [];

  function _renderActivity(items) {
    _activityAll = items;
    const el = _container.querySelector('#fr-activity');
    if (!el) return;

    const FILTERS = [
      { key: 'alle',     label: 'Alle' },
      { key: 'walk',     label: 'Gassi-Treffen' },
      { key: 'forum',    label: 'Forum' },
      { key: 'health',   label: 'Gesundheit' },
      { key: 'new_dog',  label: 'Neuer Hund' },
    ];

    const chips = FILTERS.map(f => `
      <button class="rk-chip${_activityFilter === f.key ? ' active' : ''}"
              data-af="${f.key}">${f.label}</button>
    `).join('');

    const filtered = _activityFilter === 'alle'
      ? items
      : items.filter(i => i.type === _activityFilter);

    el.innerHTML = `
      <div style="margin-top:var(--space-6)">
        <div class="by-section-label">Aktivitäten</div>
        <div class="rk-filter-group" style="margin-bottom:var(--space-3);flex-wrap:wrap">
          ${chips}
        </div>
        ${!filtered.length
          ? `<div style="text-align:center;padding:var(--space-8) var(--space-4)">
               <p style="font-size:var(--text-sm);color:var(--c-text-secondary);margin:0">
                 Keine Einträge in dieser Kategorie.
               </p>
             </div>`
          : `<div class="fr-activity-timeline">
               ${filtered.map(item => _activityItem(item)).join('')}
             </div>`
        }
      </div>
    `;

    el.querySelectorAll('[data-af]').forEach(btn => {
      btn.addEventListener('click', () => {
        _activityFilter = btn.dataset.af;
        _renderActivity(_activityAll);
      });
    });

    el.querySelectorAll('.fr-activity-item[data-nav]').forEach(btn => {
      btn.addEventListener('click', () => {
        const page    = btn.dataset.nav;
        const entryId = btn.dataset.entryId ? parseInt(btn.dataset.entryId) : null;
        const type    = btn.dataset.type;
        if (!page) return;
        if (entryId && type === 'diary') {
          App.callModule('diary', 'openDetail', entryId);
        } else if (entryId && type === 'walk') {
          App.callModule('walks', 'openDetail', entryId);
        } else if (entryId && type === 'forum') {
          App.callModule('forum', 'openThread', entryId);
        } else {
          App.navigate(page);
        }
      });
    });
  }

  const _ACTIVITY_PAGE = {
    health:  'health',
    walk:    'walks',
    forum:   'forum',
    new_dog: null,
  };

  function _activityItem(item) {
    const ago     = _timeAgo(item.created_at);
    const text    = item.text || '';
    const page    = _ACTIVITY_PAGE[item.type] || '';
    const dogLabel = item.dog_name
      ? `<span class="fr-activity-dog">${UI.escape(item.dog_name)}</span>`
      : '';

    const avatar = item.dog_foto
      ? `<img src="${UI.escape(item.dog_foto)}" alt="${UI.escape(item.dog_name || '')}"
              loading="lazy" decoding="async" data-fb="hide"
              class="fr-activity-avatar">`
      : item.avatar_url
        ? `<img src="${UI.escape(item.avatar_url)}" alt="${UI.escape(item.user_name)}"
                loading="lazy" decoding="async" data-fb="hide"
                class="fr-activity-avatar">`
        : `<div class="fr-activity-avatar fr-activity-avatar--initial">
             ${UI.escape((item.user_name || '?')[0].toUpperCase())}
           </div>`;

    const tag = page ? `button type="button"` : `div`;
    return `
      <${tag} class="fr-activity-item${page ? ' fr-activity-item--link' : ''}"
              ${page ? `data-nav="${page}"` : ''}
              ${item.entry_id ? `data-entry-id="${item.entry_id}"` : ''}
              data-type="${item.type}">
        <div class="fr-activity-avatar-wrap">
          ${avatar}
          <div class="fr-activity-icon-badge">
            <svg class="ph-icon" style="width:10px;height:10px" aria-hidden="true">
              <use href="/icons/phosphor.svg#${UI.escape(item.icon)}"></use>
            </svg>
          </div>
        </div>
        <div class="fr-activity-body">
          <div class="fr-activity-meta">
            <span class="fr-activity-user">${UI.escape(item.user_name)}</span>
            ${dogLabel}
          </div>
          ${text ? `<div class="fr-activity-text">${UI.escape(text)}</div>` : ''}
          <div class="fr-activity-time">${UI.escape(ago)}</div>
        </div>
      </${page ? 'button' : 'div'}>
    `;
  }

  function _timeAgo(iso) {
    if (!iso) return '';
    const diff = Math.floor((Date.now() - new Date(iso + (iso.endsWith('Z') ? '' : 'Z')).getTime()) / 1000);
    if (diff < 60)         return 'Gerade eben';
    if (diff < 3600)       return `vor ${Math.floor(diff / 60)} Min`;
    if (diff < 86400)      return `vor ${Math.floor(diff / 3600)} Std`;
    if (diff < 86400 * 7)  return `vor ${Math.floor(diff / 86400)} Tagen`;
    return new Date(iso).toLocaleDateString('de-DE', { day: '2-digit', month: '2-digit' });
  }

  function _updateBadge(count) {
    const el = document.getElementById('friends-badge');
    if (!el) return;
    el.textContent = count;
    el.style.display = count > 0 ? '' : 'none';
  }

  // ----------------------------------------------------------
  // EINGEHENDE ANFRAGEN
  // ----------------------------------------------------------
  function _renderIncoming(list) {
    const el = _container.querySelector('#fr-incoming');
    if (!list.length) { el.innerHTML = ''; return; }
    el.innerHTML = `
      <div style="margin-bottom:var(--space-5)">
        <div class="by-section-label">Anfragen · ${list.length}</div>
        ${list.map(r => `
          <div class="card" style="padding:var(--space-4);margin-bottom:var(--space-3);
                                   border-left:3px solid var(--c-primary)">
            <div style="display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap">
              ${_userAvatar(r.requester_name, r.dogs?.[0], r.avatar_url)}
              <div style="flex:1;min-width:120px">
                <div style="font-weight:var(--weight-semibold);color:var(--c-text);
                             overflow:hidden;text-overflow:ellipsis;white-space:nowrap">
                  ${UI.escape(r.requester_name)}
                </div>
                ${_dogPills(r.dogs, 2)}
              </div>
              <div style="display:flex;gap:var(--space-2);flex-shrink:0">
                <button class="btn btn-primary btn-sm"
                        data-fr-action="accept" data-fr-id="${r.id}" title="Annehmen">
                  <svg class="ph-icon"><use href="/icons/phosphor.svg#check"></use></svg>
                  Annehmen
                </button>
                <button class="btn btn-ghost btn-sm"
                        data-fr-action="decline" data-fr-id="${r.id}" title="Ablehnen">
                  <svg class="ph-icon"><use href="/icons/phosphor.svg#x"></use></svg>
                  Ablehnen
                </button>
              </div>
            </div>
          </div>
        `).join('')}
      </div>
    `;
  }

  // ----------------------------------------------------------
  // GESENDETE ANFRAGEN
  // ----------------------------------------------------------
  function _renderOutgoing(list) {
    const el = _container.querySelector('#fr-outgoing');
    if (!list.length) { el.innerHTML = ''; return; }
    el.innerHTML = `
      <div style="margin-bottom:var(--space-5)">
        <div class="by-section-label">Gesendet</div>
        ${list.map(r => `
          <div class="card" style="padding:var(--space-3) var(--space-4);
                                   margin-bottom:var(--space-2)">
            <div style="display:flex;align-items:center;gap:var(--space-3)">
              <div style="width:36px;height:36px;border-radius:50%;
                          background:var(--c-surface-2);
                          display:flex;align-items:center;justify-content:center;
                          font-weight:var(--weight-bold);color:var(--c-text-secondary);
                          font-size:var(--text-sm);flex-shrink:0">
                ${UI.escape((r.addressee_name || '?')[0].toUpperCase())}
              </div>
              <div class="flex-1">
                <div style="font-size:var(--text-sm);font-weight:var(--weight-semibold);
                             color:var(--c-text)">${UI.escape(r.addressee_name)}</div>
                <div class="text-xs-muted">Anfrage ausstehend</div>
              </div>
              <button class="btn btn-ghost btn-sm"
                      data-fr-action="cancel" data-fr-id="${r.id}" title="Zurückziehen">
                <svg class="ph-icon"><use href="/icons/phosphor.svg#x"></use></svg>
              </button>
            </div>
          </div>
        `).join('')}
      </div>
    `;
  }

  // ----------------------------------------------------------
  // FREUNDESLISTE
  // ----------------------------------------------------------
  function _renderFriends(list) {
    const el = _container.querySelector('#fr-list');

    if (!list.length) {
      el.innerHTML = _emptyState(
        'users-three',
        'Noch keine Freunde',
        'Verbinde dich mit anderen Hundebesitzern. Teile Routen, sieh Aktivitäten und schreib Nachrichten.',
        `<button class="btn btn-primary" id="fr-empty-search">Freunde suchen</button>`
      );
      el.querySelector('#fr-empty-search')?.addEventListener('click', () => {
        _container.querySelector('#fr-search')?.focus();
      });
      return;
    }

    el.innerHTML = `
      <div>
        <div class="by-section-label">Freunde · ${list.length}</div>
        ${list.map(f => _friendCard(f)).join('')}
      </div>
    `;

    // Notiz-Buttons
    el.querySelectorAll('.fr-note-btn').forEach(btn => {
      btn.addEventListener('click', e => {
        e.stopPropagation();
        const id   = parseInt(btn.dataset.frNoteId);
        const name = btn.dataset.frNoteName || '';
        UI.noteModal('friends', id, name, null);
      });
    });

    // Klick auf Karte → Mini-Profil
    el.querySelectorAll('.fr-card').forEach(card => {
      card.addEventListener('click', e => {
        if (e.target.closest('button')) return; // Buttons nicht überschreiben
        const fid     = parseInt(card.dataset.friendId);
        const fname   = card.dataset.friendName;
        const fdogs   = JSON.parse(card.dataset.dogs    || '[]');
        const fprofile = JSON.parse(card.dataset.profile || '{}');
        _showProfile(fid, fname, fdogs, fprofile);
      });
    });
  }

  function _friendCard(f) {
    const dogs = f.dogs || [];
    const profile = {
      bio:               f.bio               || null,
      wohnort:           f.wohnort           || null,
      erfahrung:         f.erfahrung         || null,
      social_link:       f.social_link       || null,
      profil_sichtbarkeit: f.profil_sichtbarkeit || null,
      avatar_url:        f.avatar_url        || null,
    };
    return `
      <div class="card fr-card" style="padding:var(--space-4);margin-bottom:var(--space-3);cursor:pointer;
                                        transition:box-shadow 0.15s"
           data-friend-id="${f.friend_id}"
           data-friend-name="${UI.escape(f.friend_name)}"
           data-dogs="${UI.escape(JSON.stringify(dogs))}"
           data-profile="${UI.escape(JSON.stringify(profile))}">
        <div style="display:flex;align-items:center;gap:var(--space-3)">

          <!-- Avatar (User-Avatar, erstes Hunde-Foto oder Initiale) -->
          ${_userAvatar(f.friend_name, dogs[0], f.avatar_url)}

          <!-- Name + Infos + Hunde -->
          <div class="flex-1-min">
            <div style="display:flex;align-items:center;flex-wrap:wrap;gap:2px;
                         margin-bottom:var(--space-1)">
              <span style="font-weight:var(--weight-semibold);color:var(--c-text)">
                ${UI.escape(f.friend_name)}
              </span>
              ${_erfahrungSpan(f.erfahrung)}
            </div>
            ${_wohnortLine(f.wohnort)}
            ${_bioLine(f.bio, f.profil_sichtbarkeit)}
            <div style="margin-top:var(--space-1)">
              ${dogs.length
                ? `<div style="display:flex;flex-wrap:wrap;gap:var(--space-1);align-items:center">
                     ${_dogPills(dogs, 3)}
                   </div>`
                : `<div class="text-xs-muted">Noch kein Hund eingetragen</div>`
              }
            </div>
          </div>

          <!-- Aktionen -->
          <div style="display:flex;gap:var(--space-1);flex-shrink:0">
            <button class="btn btn-ghost btn-sm fr-note-btn"
                    data-fr-note-id="${f.friend_id}"
                    data-fr-note-name="${UI.escape(f.friend_name)}"
                    title="Notiz">
              <svg class="ph-icon"><use href="/icons/phosphor.svg#note-pencil"></use></svg>
            </button>
            <button class="btn btn-ghost btn-sm"
                    data-fr-action="chat" data-fr-id="${f.friend_id}"
                    title="Nachricht schreiben">
              <svg class="ph-icon"><use href="/icons/phosphor.svg#chat-circle-dots"></use></svg>
            </button>
            <svg class="ph-icon" style="width:16px;height:16px;color:var(--c-border);
                 align-self:center;flex-shrink:0" aria-hidden="true">
              <use href="/icons/phosphor.svg#caret-down"></use>
            </svg>
          </div>

        </div>

        <!-- Hunde-Foto-Zeile wenn mehrere Hunde Fotos haben -->
        ${_dogPhotoRow(dogs)}

      </div>
    `;
  }

  function _dogPhotoRow(dogs) {
    const withPhotos = dogs.filter(d => d.foto_url);
    if (withPhotos.length < 2) return ''; // 1 Foto schon im Avatar, < 2 lohnt sich nicht
    return `
      <div style="display:flex;gap:var(--space-2);margin-top:var(--space-3);
                  padding-top:var(--space-3);border-top:1px solid var(--c-border)">
        ${withPhotos.slice(0, 4).map(d => `
          <div class="text-center">
            <img src="${UI.escape(d.foto_url)}" alt="${UI.escape(d.name)}"
                 loading="lazy" decoding="async" data-fb="hide"
                 style="width:44px;height:44px;border-radius:50%;object-fit:cover;
                        border:2px solid var(--c-surface)">
            <div style="font-size:10px;color:var(--c-text-muted);margin-top:2px;
                         max-width:44px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap">
              ${UI.escape(d.name)}
            </div>
          </div>
        `).join('')}
      </div>
    `;
  }

  // ----------------------------------------------------------
  // MINI-PROFIL MODAL
  // ----------------------------------------------------------
  function _showProfile(friendId, friendName, dogs, profile = {}) {
    const dogsHTML = dogs.length
      ? `<div style="display:grid;grid-template-columns:repeat(auto-fill,minmax(100px,1fr));
                     gap:var(--space-3);margin-top:var(--space-4)">
           ${dogs.map(d => `
             <div class="text-center">
               ${d.foto_url
                 ? `<img src="${UI.escape(d.foto_url)}" alt="${UI.escape(d.name)}"
                         loading="lazy" decoding="async" data-fb="hide"
                         style="width:72px;height:72px;border-radius:50%;object-fit:cover;
                                border:2px solid var(--c-primary);margin-bottom:var(--space-2)">`
                 : `<div style="width:72px;height:72px;border-radius:50%;
                                background:var(--c-surface-2);
                                display:flex;align-items:center;justify-content:center;
                                font-size:1.75rem;margin:0 auto var(--space-2)">🐕</div>`
               }
               <div style="font-size:var(--text-sm);font-weight:var(--weight-semibold);
                            color:var(--c-text)">${UI.escape(d.name)}</div>
               ${d.rasse
                 ? `<div class="text-xs-secondary">${UI.escape(d.rasse)}</div>`
                 : ''}
             </div>
           `).join('')}
         </div>`
      : `<p style="font-size:var(--text-sm);color:var(--c-text-muted);margin-top:var(--space-4)">
           Noch kein Hund eingetragen.
         </p>`;

    const profileInfoHTML = (() => {
      const parts = [];
      if (profile.wohnort) {
        parts.push(`<div style="display:flex;align-items:center;gap:var(--space-2);
                                font-size:var(--text-sm);color:var(--c-text-secondary)">
          📍 ${UI.escape(profile.wohnort)}
        </div>`);
      }
      if (profile.erfahrung && _erfahrungBadge[profile.erfahrung]) {
        parts.push(`<div class="text-sm-secondary">
          ${_erfahrungBadge[profile.erfahrung]}
        </div>`);
      }
      if (profile.bio && profile.profil_sichtbarkeit !== 'private') {
        parts.push(`<div style="font-size:var(--text-sm);color:var(--c-text);
                                line-height:1.5;padding-top:var(--space-2)">
          ${UI.escape(profile.bio)}
        </div>`);
      }
      if (profile.social_link) {
        parts.push(`<div style="font-size:var(--text-xs);word-break:break-all">
          <a href="${UI.escape(profile.social_link)}" target="_blank" rel="noopener noreferrer"
             class="text-primary">${UI.escape(profile.social_link)}</a>
        </div>`);
      }
      if (!parts.length) return '';
      return `<div style="display:flex;flex-direction:column;gap:var(--space-2);
                          margin-bottom:var(--space-4)">${parts.join('')}</div>`;
    })();

    const badgesHTML = (profile.is_founder || profile.is_partner) ? `
      <div style="display:flex;gap:var(--space-2);margin-bottom:var(--space-3);flex-wrap:wrap">
        ${profile.is_founder ? `<span class="badge" style="background:#7c3aed;color:#fff">
          <svg class="ph-icon" aria-hidden="true" style="width:12px;height:12px"><use href="/icons/phosphor.svg#key"></use></svg>
          ${profile.founder_number ? `Gründer #${profile.founder_number}` : 'Gründer'}
        </span>` : ''}
        ${profile.is_partner ? `<span class="badge" style="background:#0ea5e9;color:#fff">
          <svg class="ph-icon" aria-hidden="true" style="width:12px;height:12px"><use href="/icons/phosphor.svg#handshake"></use></svg>
          Partner
        </span>` : ''}
      </div>` : '';

    UI.modal.open({
      title: UI.escape(friendName),
      body: `
        <div>
          ${badgesHTML}
          ${profileInfoHTML}
          <div class="by-section-label">${dogs.length === 1 ? 'Hund' : 'Hunde'}</div>
          ${dogsHTML}
        </div>
      `,
      footer: `
        <button class="btn btn-primary" id="modal-chat-btn" form="">
          <svg class="ph-icon" aria-hidden="true"><use href="/icons/phosphor.svg#chat-circle-dots"></use></svg>
          Nachricht schreiben
        </button>
        <button class="btn btn-ghost text-danger" id="modal-remove-btn" form=""
               >
          <svg class="ph-icon" aria-hidden="true"><use href="/icons/phosphor.svg#user-minus"></use></svg>
          Entfernen
        </button>
      `,
    });

    document.getElementById('modal-chat-btn')?.addEventListener('click', () => {
      UI.modal.close();
      _openChat(friendId);
    });
    document.getElementById('modal-remove-btn')?.addEventListener('click', async () => {
      UI.modal.close();
      await _removeFriend(friendId, friendName);
    });
  }

  // ----------------------------------------------------------
  // SUCHE
  // ----------------------------------------------------------
  async function _doSearch(q) {
    if (!_appState.user) return;
    const el = _container.querySelector('#fr-search-results');
    try {
      const results = await API.friends.search(q);
      if (!results.length) {
        el.innerHTML = `
          <div class="card" style="padding:var(--space-4);margin-bottom:var(--space-4);
                                   text-align:center;color:var(--c-text-muted);
                                   font-size:var(--text-sm)">
            Kein Nutzer gefunden.
          </div>`;
        return;
      }
      el.innerHTML = `
        <div class="card" style="margin-bottom:var(--space-4);overflow:hidden">
          ${results.map((u, i) => `
            <div style="display:flex;align-items:center;gap:var(--space-3);
                        padding:var(--space-3) var(--space-4);
                        ${i < results.length - 1 ? 'border-bottom:1px solid var(--c-border)' : ''}">
              ${_userAvatar(u.name, null, u.avatar_url)}
              <div class="flex-1-min">
                <div style="display:flex;align-items:center;flex-wrap:wrap;gap:4px;
                             margin-bottom:2px">
                  <span style="font-size:var(--text-sm);font-weight:var(--weight-semibold);
                               color:var(--c-text)">${UI.escape(u.name)}</span>
                  ${u.is_founder ? `<span style="font-size:10px;font-weight:700;background:#7c3aed;color:#fff;padding:1px 5px;border-radius:4px">${u.founder_number ? `Gründer #${u.founder_number}` : 'Gründer'}</span>` : ''}
                  ${u.is_partner ? `<span style="font-size:10px;font-weight:700;background:#0ea5e9;color:#fff;padding:1px 5px;border-radius:4px">Partner</span>` : ''}
                  ${_erfahrungSpan(u.erfahrung)}
                </div>
                ${_wohnortLine(u.wohnort)}
                ${_bioLine(u.bio, u.profil_sichtbarkeit)}
                ${u.dogs?.length
                  ? `<div style="font-size:var(--text-xs);color:var(--c-text-secondary);
                                 margin-top:2px">
                       ${u.dogs.map(d => UI.escape(d.name) + (d.rasse ? ` · ${UI.escape(d.rasse)}` : '')).join(' &nbsp;|&nbsp; ')}
                     </div>`
                  : ''}
              </div>
              <button class="btn btn-primary btn-sm fr-add-btn" title="Anfrage senden"
                      data-user-id="${u.id}" data-user-name="${UI.escape(u.name)}">
                <svg class="ph-icon"><use href="/icons/phosphor.svg#user-plus"></use></svg>
              </button>
            </div>
          `).join('')}
        </div>
      `;

      el.querySelectorAll('.fr-add-btn').forEach(btn => {
        btn.addEventListener('click', () => _sendRequest(parseInt(btn.dataset.userId), btn));
      });

    } catch { el.innerHTML = ''; }
  }

  // ----------------------------------------------------------
  // AKTIONEN
  // ----------------------------------------------------------
  async function _sendRequest(userId, btn) {
    if (!_appState.user) { App.navigate('settings'); return; }
    btn.disabled = true;
    btn.innerHTML = `<svg class="ph-icon"><use href="/icons/phosphor.svg#spinner"></use></svg>`;
    try {
      await API.friends.sendRequest(userId);
      UI.toast.success('Freundschaftsanfrage gesendet!');
      _container.querySelector('#fr-search').value = '';
      _container.querySelector('#fr-search-results').innerHTML = '';
      await _loadFriends();
    } catch (e) {
      UI.toast.error(e.message || 'Fehler beim Senden.');
      btn.disabled = false;
      btn.innerHTML = `<svg class="ph-icon"><use href="/icons/phosphor.svg#user-plus"></use></svg> Anfrage`;
    }
  }

  async function _accept(id) {
    try {
      await API.friends.accept(id);
      UI.toast.success('Freundschaft angenommen!');
      await _loadFriends();
    } catch (e) { UI.toast.error(e.message); }
  }

  async function _decline(id) {
    try {
      await API.friends.decline(id);
      await _loadFriends();
    } catch (e) { UI.toast.error(e.message); }
  }

  async function _cancel(id) {
    try {
      await API.friends.decline(id);
      await _loadFriends();
    } catch (e) { UI.toast.error(e.message); }
  }

  async function _removeFriend(userId, name) {
    const ok = await UI.modal.confirm({
      title:       'Freund entfernen?',
      message:     `${name} wird aus deiner Freundesliste entfernt.`,
      confirmText: 'Entfernen',
    });
    if (!ok) return;
    try {
      await API.friends.remove(userId);
      UI.toast.info('Freund entfernt.');
      await _loadFriends();
    } catch (e) { UI.toast.error(e.message); }
  }

  async function _openChat(userId) {
    if (!_appState.user) { App.navigate('settings'); return; }
    try {
      const { conversation_id } = await API.chat.start(userId);
      App.navigate('chat', true, { conversation_id });
    } catch (e) { UI.toast.error(e.message); }
  }

  // ----------------------------------------------------------
  // RENDER-HELPERS
  // ----------------------------------------------------------
  function _userAvatar(name, firstDog, avatarUrl) {
    if (avatarUrl) {
      return `<img src="${UI.escape(avatarUrl)}" alt="${UI.escape(name)}"
                   loading="lazy" decoding="async" data-fb="hide"
                   style="width:44px;height:44px;border-radius:50%;object-fit:cover;
                          border:2px solid var(--c-primary);flex-shrink:0">`;
    }
    if (firstDog?.foto_url) {
      return `<img src="${UI.escape(firstDog.foto_url)}" alt="${UI.escape(firstDog.name)}"
                   loading="lazy" decoding="async" data-fb="hide"
                   style="width:44px;height:44px;border-radius:50%;object-fit:cover;
                          border:2px solid var(--c-primary);flex-shrink:0">`;
    }
    return `
      <div style="width:44px;height:44px;border-radius:50%;flex-shrink:0;
                  background:var(--c-primary-subtle);
                  border:2px solid var(--c-primary);
                  display:flex;align-items:center;justify-content:center;
                  font-weight:var(--weight-bold);color:var(--c-primary)">
        ${UI.escape((name || '?')[0].toUpperCase())}
      </div>`;
  }

  const _erfahrungBadge = {
    einsteiger: '🐾 Einsteiger',
    erfahren:   '⭐ Erfahren',
    trainer:    '🎓 Trainer',
    zuechter:   '🏅 Züchter',
  };

  function _erfahrungSpan(erfahrung) {
    if (!erfahrung || !_erfahrungBadge[erfahrung]) return '';
    return `<span style="font-size:10px;padding:1px 5px;border-radius:3px;
                         background:var(--c-surface-2);color:var(--c-text-secondary);
                         margin-left:4px;white-space:nowrap">${_erfahrungBadge[erfahrung]}</span>`;
  }

  function _wohnortLine(wohnort) {
    if (!wohnort) return '';
    return `<span class="text-xs-muted">📍 ${UI.escape(wohnort)}</span>`;
  }

  function _bioLine(bio, sichtbarkeit) {
    if (!bio || sichtbarkeit === 'private') return '';
    const text = bio.length > 120 ? bio.substring(0, 120) + '…' : bio;
    return `<div style="font-size:var(--text-xs);color:var(--c-text-secondary);
                        margin-top:var(--space-1);line-height:1.4;
                        overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;
                        -webkit-box-orient:vertical">${UI.escape(text)}</div>`;
  }

  function _dogPills(dogs, max) {
    if (!dogs?.length) return '';
    const visible = dogs.slice(0, max);
    const rest    = dogs.length - max;
    return `
      <div style="display:flex;flex-wrap:wrap;gap:4px;align-items:center">
        ${visible.map(d => `
          <span style="font-size:10px;padding:1px 6px;border-radius:var(--radius-full);
                       background:var(--c-surface-2);color:var(--c-text-secondary)">
            🐕 ${UI.escape(d.name)}${d.rasse ? ` · ${UI.escape(d.rasse)}` : ''}
          </span>
        `).join('')}
        ${rest > 0 ? `<span style="font-size:10px;color:var(--c-text-muted)">+${rest}</span>` : ''}
      </div>
    `;
  }

  function _emptyState(icon, title, text, cta = '') {
    return `<div class="empty-state">
      <svg class="ph-icon empty-state-icon" aria-hidden="true">
        <use href="/icons/phosphor.svg#${icon}"></use>
      </svg>
      <div class="empty-state-title">${title}</div>
      ${text ? `<p class="empty-state-text">${text}</p>` : ''}
      ${cta ? `<div class="empty-state-cta">${cta}</div>` : ''}
    </div>`;
  }

  // ----------------------------------------------------------
  // NOTIZ-MODAL
  // ----------------------------------------------------------

  // ----------------------------------------------------------
  return { init, refresh, onDogChange, _accept, _decline, _cancel, _removeFriend, _openChat };

})();