/* ============================================================
   BAN YARO — Hundesitting
   Sitter suchen · Profil anbieten · Anfragen verwalten
   ============================================================ */

window.Page_sitting = (() => {

  // ----------------------------------------------------------
  // Konstanten
  // ----------------------------------------------------------
  const SERVICES = [
    { id: 'tagesbetreuung', label: 'Tagesbetreuung', icon: '☀️' },
    { id: 'uebernachtung',  label: 'Übernachtung',   icon: '🌙' },
    { id: 'gassi',          label: 'Gassi gehen',    icon: '🦮' },
    { id: 'hausbesuch',     label: 'Hausbesuch',     icon: '🏠' },
  ];

  // ----------------------------------------------------------
  // State
  // ----------------------------------------------------------
  let _container   = null;
  let _state       = null;
  let _tab         = 'suchen';   // suchen | profil | anfragen
  let _sitters     = [];
  let _mySitter    = null;
  let _myRequests  = [];
  let _inbox       = [];

  // ----------------------------------------------------------
  // init
  // ----------------------------------------------------------
  async function init(container, appState) {
    _container = container;
    _state     = appState;
    _render();
    await _load();
  }

  async function refresh() { await _load(); }

  // ----------------------------------------------------------
  // Render Grundstruktur
  // ----------------------------------------------------------
  function _render() {
    _container.innerHTML = `
      <div class="sitting-tabs" id="sit-tabs">
        <button class="sitting-tab active" data-sit-tab="suchen">🔍 Sitter finden</button>
        ${_state.user ? `
          <button class="sitting-tab" data-sit-tab="profil">👤 Mein Profil</button>
          <button class="sitting-tab" data-sit-tab="anfragen">📬 Anfragen</button>
        ` : ''}
      </div>
      <div id="sit-content" class="sitting-content"></div>
    `;
    _container.addEventListener('click', _onClick);
  }

  // ----------------------------------------------------------
  // Daten laden
  // ----------------------------------------------------------
  async function _load() {
    const content = document.getElementById('sit-content');
    if (!content) return;
    content.innerHTML = UI.skeleton(3);

    const tasks = [API.sitting.list()];
    if (_state.user) {
      tasks.push(API.sitting.me());
      tasks.push(API.sitting.requests());
      tasks.push(API.sitting.inbox());
    }

    try {
      const results = await Promise.allSettled(tasks);
      _sitters    = results[0].status === 'fulfilled' ? results[0].value : [];
      _mySitter   = results[1]?.status === 'fulfilled' ? results[1].value : null;
      _myRequests = results[2]?.status === 'fulfilled' ? results[2].value : [];
      _inbox      = results[3]?.status === 'fulfilled' ? results[3].value : [];
    } catch {}

    _renderTab();
  }

  // ----------------------------------------------------------
  // Tab-Inhalte
  // ----------------------------------------------------------
  function _renderTab() {
    const content = document.getElementById('sit-content');
    if (!content) return;
    if (_tab === 'suchen')   _renderSuchen(content);
    if (_tab === 'profil')   _renderProfil(content);
    if (_tab === 'anfragen') _renderAnfragen(content);
  }

  // ---- Tab: Sitter suchen ----
  function _renderSuchen(el) {
    if (!_sitters.length) {
      el.innerHTML = UI.emptyState({ icon: '🐕', title: 'Keine Sitter', text: 'Noch keine Sitter in deiner Nähe registriert.' });
      return;
    }
    el.innerHTML = `
      <div class="sitting-list">
        ${_sitters.map(s => _sitterCardHTML(s)).join('')}
      </div>
    `;
  }

  function _sitterCardHTML(s) {
    const svcs = (s.services || []).map(id => {
      const svc = SERVICES.find(x => x.id === id);
      return svc ? `<span class="sit-service-badge">${svc.icon} ${svc.label}</span>` : '';
    }).join('');
    const dist = s.distanz_m != null
      ? (s.distanz_m >= 1000 ? (s.distanz_m / 1000).toFixed(1) + ' km' : s.distanz_m + ' m')
      : '';
    return `
      <div class="sitting-card" data-sit-id="${s.id}">
        <div class="sitting-card-avatar">🐾</div>
        <div class="sitting-card-body">
          <div class="sitting-card-name">${UI.escHtml(s.sitter_name)}</div>
          ${dist ? `<div class="sitting-card-dist">📍 ${dist} entfernt</div>` : ''}
          ${s.beschreibung ? `<div class="sitting-card-desc">${UI.escHtml(s.beschreibung)}</div>` : ''}
          <div class="sitting-services">${svcs}</div>
        </div>
        <div class="sitting-card-side">
          <div class="sitting-price">${s.preis_pro_tag > 0 ? s.preis_pro_tag.toFixed(0) + ' €/Tag' : 'Preis anfragen'}</div>
          <div class="sitting-dogs">max. ${s.max_hunde} Hund${s.max_hunde !== 1 ? 'e' : ''}</div>
        </div>
      </div>
    `;
  }

  // ---- Tab: Mein Profil ----
  function _renderProfil(el) {
    if (!_mySitter) {
      el.innerHTML = `
        <div class="sitting-empty-profil">
          <div style="font-size:3rem">🐾</div>
          <h3>Werde Hundesitter</h3>
          <p>Biete anderen Hundebesitzern deine Dienste an und verdiene etwas dazu.</p>
          <button class="btn btn-primary" id="sit-create-profil-btn">Profil erstellen</button>
        </div>
      `;
      return;
    }
    const s    = _mySitter;
    const svcs = (s.services || []).map(id => SERVICES.find(x => x.id === id)?.label || id).join(', ');
    el.innerHTML = `
      <div class="sitting-my-profil">
        <div class="sitting-profil-header">
          <div class="sitting-profil-status ${s.aktiv ? 'active' : 'inactive'}">
            ${s.aktiv ? '✅ Aktiv' : '⏸️ Pausiert'}
          </div>
          <button class="btn btn-secondary btn-sm" id="sit-edit-profil-btn">✏️ Bearbeiten</button>
        </div>
        ${s.beschreibung ? `<p>${UI.escHtml(s.beschreibung)}</p>` : ''}
        <div class="sitting-profil-facts">
          <div class="sitting-profil-fact"><strong>${s.preis_pro_tag > 0 ? s.preis_pro_tag.toFixed(0) + ' €' : '–'}</strong> pro Tag</div>
          <div class="sitting-profil-fact"><strong>${s.max_hunde}</strong> Hund${s.max_hunde !== 1 ? 'e' : ''} max.</div>
          <div class="sitting-profil-fact"><strong>${s.radius_km} km</strong> Umkreis</div>
        </div>
        <div class="sitting-services" style="margin-top:var(--space-3)">${svcs || '(keine Services angegeben)'}</div>
      </div>
    `;
  }

  // ---- Tab: Anfragen ----
  function _renderAnfragen(el) {
    const inbox  = _inbox;
    const myReqs = _myRequests;

    let html = '';

    if (inbox.length) {
      html += `<div class="sitting-section-label">📬 Eingehende Anfragen (als Sitter)</div>`;
      html += inbox.map(r => _requestCardHTML(r, 'inbox')).join('');
    }

    if (myReqs.length) {
      html += `<div class="sitting-section-label" style="margin-top:var(--space-4)">📤 Meine Anfragen</div>`;
      html += myReqs.map(r => _requestCardHTML(r, 'sent')).join('');
    }

    if (!inbox.length && !myReqs.length) {
      html = UI.emptyState({ icon: '📬', title: 'Keine Anfragen', text: 'Noch keine Sitting-Anfragen vorhanden.' });
    }

    el.innerHTML = html;
  }

  function _requestCardHTML(r, mode) {
    const STATUS_COLOR = { offen: '#f59e0b', angenommen: '#10b981', abgelehnt: '#ef4444', abgebrochen: '#6b7280' };
    const color = STATUS_COLOR[r.status] || '#6b7280';
    const name  = mode === 'inbox' ? r.anfragender_name : r.sitter_name;
    return `
      <div class="sitting-request-card" data-sit-req="${r.id}" data-sit-req-mode="${mode}">
        <div class="sitting-req-header">
          <span class="sitting-req-name">${UI.escHtml(name || '?')}</span>
          <span class="sitting-req-status" style="color:${color}">${r.status}</span>
        </div>
        <div class="sitting-req-dates">📅 ${r.von} – ${r.bis}</div>
        ${r.nachricht ? `<div class="sitting-req-msg">${UI.escHtml(r.nachricht)}</div>` : ''}
        ${r.status === 'offen' ? _requestActions(r.id, mode) : ''}
      </div>
    `;
  }

  function _requestActions(id, mode) {
    if (mode === 'inbox') {
      return `
        <div class="sitting-req-actions">
          <button class="btn btn-primary btn-sm"   data-sit-accept="${id}">✅ Annehmen</button>
          <button class="btn btn-danger btn-sm"    data-sit-decline="${id}">❌ Ablehnen</button>
        </div>
      `;
    }
    return `
      <div class="sitting-req-actions">
        <button class="btn btn-secondary btn-sm" data-sit-cancel="${id}">🚫 Abbrechen</button>
      </div>
    `;
  }

  // ----------------------------------------------------------
  // Sitter Detail + Anfrage senden
  // ----------------------------------------------------------
  function _showSitterDetail(id) {
    const s     = _sitters.find(x => x.id === id);
    if (!s) return;
    const svcs  = (s.services || []).map(sv => {
      const f = SERVICES.find(x => x.id === sv);
      return f ? `<span class="sit-service-badge">${f.icon} ${f.label}</span>` : '';
    }).join('');
    const dist = s.distanz_m != null
      ? (s.distanz_m >= 1000 ? (s.distanz_m / 1000).toFixed(1) + ' km' : s.distanz_m + ' m')
      : null;

    const body = `
      <div class="sitting-detail-avatar">🐾</div>
      <h3 style="margin:var(--space-2) 0">${UI.escHtml(s.sitter_name)}</h3>
      ${dist ? `<div style="color:var(--c-text-secondary);margin-bottom:var(--space-2)">📍 ${dist} entfernt</div>` : ''}
      ${s.beschreibung ? `<p>${UI.escHtml(s.beschreibung)}</p>` : ''}
      <div class="sitting-services" style="margin:var(--space-3) 0">${svcs}</div>
      <div class="sitting-profil-facts">
        <div class="sitting-profil-fact"><strong>${s.preis_pro_tag > 0 ? s.preis_pro_tag.toFixed(0) + ' €' : '–'}</strong> pro Tag</div>
        <div class="sitting-profil-fact"><strong>${s.max_hunde}</strong> max. Hund${s.max_hunde !== 1 ? 'e' : ''}</div>
        <div class="sitting-profil-fact"><strong>${s.radius_km} km</strong> Umkreis</div>
      </div>
    `;

    const footer = _state.user && _mySitter?.user_id !== s.user_id ? `
      <button class="btn btn-primary" id="sit-anfrage-btn">📬 Anfrage senden</button>
    ` : (!_state.user ? `<span style="color:var(--c-text-secondary)">Zum Anfragen bitte einloggen.</span>` : '');

    UI.modal.open({ title: 'Sitter-Profil', body, footer });

    document.getElementById('sit-anfrage-btn')?.addEventListener('click', () => {
      UI.modal.close();
      setTimeout(() => _openAnfrageForm(s), 50);
    });
  }

  function _openAnfrageForm(s) {
    const dogs = _state.dogs || [];
    const id   = 'sit-anfrage-form';
    const body = `
      <form id="${id}">
        <p style="color:var(--c-text-secondary);margin-bottom:var(--space-3)">Anfrage an <strong>${UI.escHtml(s.sitter_name)}</strong></p>
        <div class="form-row-2">
          <div class="form-group">
            <label class="form-label">Von *</label>
            <input class="form-control" type="date" name="von" required>
          </div>
          <div class="form-group">
            <label class="form-label">Bis *</label>
            <input class="form-control" type="date" name="bis" required>
          </div>
        </div>
        ${dogs.length ? `
          <div class="form-group">
            <label class="form-label">Welche Hunde?</label>
            ${dogs.map(d => `
              <label class="form-check">
                <input type="checkbox" name="dog_ids" value="${d.id}" checked>
                ${UI.escHtml(d.name)}
              </label>
            `).join('')}
          </div>
        ` : ''}
        <div class="form-group">
          <label class="form-label">Nachricht</label>
          <textarea class="form-control" name="nachricht" rows="3" placeholder="z.B. Besonderheiten deines Hundes…"></textarea>
        </div>
      </form>
    `;
    const footer = `
      <button class="btn btn-secondary" onclick="UI.modal.close()">Abbrechen</button>
      <button class="btn btn-primary" type="submit" form="${id}" id="sit-anfrage-submit">Anfrage senden</button>
    `;
    UI.modal.open({ title: 'Anfrage senden', body, footer });

    const form      = document.getElementById(id);
    const submitBtn = document.querySelector(`[form="${id}"][type="submit"]`) || form.querySelector('[type="submit"]');

    form.addEventListener('submit', async e => {
      e.preventDefault();
      const fd      = new FormData(form);
      const dogIds  = [...form.querySelectorAll('[name="dog_ids"]:checked')].map(cb => parseInt(cb.value));
      const data    = {
        sitter_id: s.id,
        von:       fd.get('von'),
        bis:       fd.get('bis'),
        dog_ids:   dogIds,
        nachricht: fd.get('nachricht') || null,
      };
      if (submitBtn) { submitBtn.disabled = true; submitBtn.textContent = '…'; }
      try {
        await API.sitting.sendRequest(data);
        UI.modal.close();
        UI.toast('Anfrage gesendet!');
        await _load();
      } catch (err) {
        UI.toast(err.message, 'error');
      } finally {
        if (submitBtn) { submitBtn.disabled = false; submitBtn.textContent = 'Anfrage senden'; }
      }
    });
  }

  // ----------------------------------------------------------
  // Sitter-Profil Formular
  // ----------------------------------------------------------
  function _openProfilForm() {
    const s  = _mySitter;
    const id = 'sit-profil-form';
    const body = `
      <form id="${id}">
        <div class="form-group">
          <label class="form-label">Über mich / Beschreibung</label>
          <textarea class="form-control" name="beschreibung" rows="3">${s?.beschreibung || ''}</textarea>
        </div>
        <div class="form-row-2">
          <div class="form-group">
            <label class="form-label">Preis pro Tag (€)</label>
            <input class="form-control" type="number" step="1" min="0" name="preis_pro_tag" value="${s?.preis_pro_tag ?? 0}">
          </div>
          <div class="form-group">
            <label class="form-label">Max. Hunde</label>
            <input class="form-control" type="number" min="1" max="10" name="max_hunde" value="${s?.max_hunde ?? 1}">
          </div>
        </div>
        <div class="form-group">
          <label class="form-label">Services</label>
          ${SERVICES.map(svc => `
            <label class="form-check">
              <input type="checkbox" name="services" value="${svc.id}" ${s?.services?.includes(svc.id) ? 'checked' : ''}>
              ${svc.icon} ${svc.label}
            </label>
          `).join('')}
        </div>
        <div class="form-row-2">
          <div class="form-group">
            <label class="form-label">Breitengrad</label>
            <input class="form-control" type="number" step="any" name="lat" id="sit-lat" value="${s?.lat || ''}">
          </div>
          <div class="form-group">
            <label class="form-label">Längengrad</label>
            <input class="form-control" type="number" step="any" name="lon" id="sit-lon" value="${s?.lon || ''}">
          </div>
        </div>
        <button type="button" class="btn btn-secondary btn-sm" id="sit-gps-btn">📍 Meine Position</button>
        <div class="form-group" style="margin-top:var(--space-3)">
          <label class="form-label">Umkreis (km)</label>
          <input class="form-control" type="number" min="1" max="100" name="radius_km" value="${s?.radius_km ?? 20}">
        </div>
        ${s ? `
          <div class="form-group">
            <label class="form-check">
              <input type="checkbox" name="aktiv" value="1" ${s.aktiv ? 'checked' : ''}> Profil aktiv (sichtbar für andere)
            </label>
          </div>
        ` : ''}
      </form>
    `;
    const footer = `
      <button class="btn btn-secondary" onclick="UI.modal.close()">Abbrechen</button>
      <button class="btn btn-primary" type="submit" form="${id}" id="sit-profil-submit">
        ${s ? 'Speichern' : 'Profil erstellen'}
      </button>
    `;
    UI.modal.open({ title: s ? 'Sitter-Profil bearbeiten' : 'Sitter-Profil erstellen', body, footer });

    document.getElementById('sit-gps-btn')?.addEventListener('click', async () => {
      try {
        const pos = await API.getLocation();
        document.getElementById('sit-lat').value = pos.lat.toFixed(6);
        document.getElementById('sit-lon').value = pos.lon.toFixed(6);
      } catch { UI.toast('GPS nicht verfügbar.', 'error'); }
    });

    const form      = document.getElementById(id);
    const submitBtn = document.querySelector(`[form="${id}"][type="submit"]`) || form.querySelector('[type="submit"]');

    form.addEventListener('submit', async e => {
      e.preventDefault();
      const fd   = new FormData(form);
      const svcs = [...form.querySelectorAll('[name="services"]:checked')].map(cb => cb.value);
      const data = {
        beschreibung:  fd.get('beschreibung') || null,
        preis_pro_tag: parseFloat(fd.get('preis_pro_tag')) || 0,
        max_hunde:     parseInt(fd.get('max_hunde'))       || 1,
        services:      svcs,
        lat:           fd.get('lat')  ? parseFloat(fd.get('lat'))  : null,
        lon:           fd.get('lon')  ? parseFloat(fd.get('lon'))  : null,
        radius_km:     parseInt(fd.get('radius_km'))       || 20,
      };
      if (s) data.aktiv = form.querySelector('[name="aktiv"]')?.checked ? 1 : 0;

      if (submitBtn) { submitBtn.disabled = true; submitBtn.textContent = '…'; }
      try {
        if (s) {
          await API.sitting.updateMe(data);
        } else {
          await API.sitting.create(data);
        }
        UI.modal.close();
        UI.toast(s ? 'Profil aktualisiert.' : 'Profil erstellt!');
        await _load();
      } catch (err) {
        UI.toast(err.message, 'error');
      } finally {
        if (submitBtn) { submitBtn.disabled = false; submitBtn.textContent = s ? 'Speichern' : 'Profil erstellen'; }
      }
    });
  }

  // ----------------------------------------------------------
  // Click-Handler
  // ----------------------------------------------------------
  function _onClick(e) {
    // Tab-Wechsel
    const tabBtn = e.target.closest('[data-sit-tab]');
    if (tabBtn) {
      _tab = tabBtn.dataset.sitTab;
      document.querySelectorAll('[data-sit-tab]').forEach(b => b.classList.toggle('active', b.dataset.sitTab === _tab));
      _renderTab();
      return;
    }

    // Sitter-Karte
    const sitterCard = e.target.closest('[data-sit-id]');
    if (sitterCard && !e.target.closest('button')) {
      _showSitterDetail(parseInt(sitterCard.dataset.sitId));
      return;
    }

    // Profil erstellen
    if (e.target.closest('#sit-create-profil-btn') || e.target.closest('#sit-edit-profil-btn')) {
      _openProfilForm();
      return;
    }

    // Anfragen-Aktionen
    const acceptBtn  = e.target.closest('[data-sit-accept]');
    const declineBtn = e.target.closest('[data-sit-decline]');
    const cancelBtn  = e.target.closest('[data-sit-cancel]');
    if (acceptBtn)  { _changeReqStatus(parseInt(acceptBtn.dataset.sitAccept),   'angenommen'); return; }
    if (declineBtn) { _changeReqStatus(parseInt(declineBtn.dataset.sitDecline), 'abgelehnt');  return; }
    if (cancelBtn)  { _changeReqStatus(parseInt(cancelBtn.dataset.sitCancel),   'abgebrochen'); return; }
  }

  async function _changeReqStatus(id, status) {
    try {
      await API.sitting.updateRequest(id, status);
      UI.toast(`Anfrage ${status}.`);
      await _load();
    } catch (e) { UI.toast(e.message, 'error'); }
  }

  return { init, refresh };

})();