{% extends "base.html" %}

{% block title %}Bibliotheks-Ausleihen - {{ APP_VERSION }}{% endblock %}

{% block content %}
<style>
  .library-admin-shell {
    max-width: 1460px;
    margin: 0 auto;
    padding: 18px 20px 32px;
  }

  .library-admin-hero {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 18px;
    padding: 20px 22px;
    background: linear-gradient(135deg, #ffffff 0%, #f7f9fc 100%);
    border: 1px solid #dbe4ee;
    border-radius: 18px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  }

  .library-admin-hero h1 {
    margin: 0 0 6px 0;
    font-size: 1.9rem;
  }

  .library-admin-hero p {
    margin: 0;
    color: #5b6472;
  }

  .hero-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .hero-actions .btn {
    white-space: nowrap;
  }

  .summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-bottom: 18px;
  }

  .summary-card {
    background: var(--ui-surface);
    border: 1px solid #e2e8f0;
    border-radius: 14px;
    padding: 14px 16px;
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.05);
  }

  .summary-card .label {
    display: block;
    font-size: 0.85rem;
    color: #6b7280;
    margin-bottom: 4px;
  }

  .summary-card .value {
    font-size: 1.6rem;
    font-weight: 800;
    color: #1f2937;
  }

  .filter-bar {
    display: grid;
    grid-template-columns: 1fr 220px 220px;
    gap: 10px;
    margin-bottom: 16px;
  }

  .filter-bar input,
  .filter-bar select {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid #d6dde6;
    border-radius: 12px;
    background: var(--ui-surface);
  }

  .panel {
    background: var(--ui-surface);
    border: 1px solid #e2e8f0;
    border-radius: 18px;
    padding: 18px;
    box-shadow: 0 10px 26px rgba(15, 23, 42, 0.06);
    margin-bottom: 18px;
  }

  .panel h2 {
    margin: 0 0 12px 0;
    font-size: 1.2rem;
  }

  .library-table {
    width: 100%;
    border-collapse: collapse;
  }

  .library-table th,
  .library-table td {
    padding: 12px 10px;
    border-bottom: 1px solid #edf2f7;
    vertical-align: top;
    text-align: left;
  }

  .library-table th {
    font-size: 0.84rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #64748b;
    background: var(--ui-surface-soft);
  }

  .library-table tr:hover td {
    background: #fbfdff;
  }

  .mono {
    font-family: monospace;
    font-size: 0.92rem;
  }

  .badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1;
  }

  .badge-active { background: #dbeafe; color: #1d4ed8; }
  .badge-planned { background: #fef3c7; color: #b45309; }
  .badge-completed { background: #dcfce7; color: #166534; }
  .badge-open { background: #fee2e2; color: #991b1b; }
  .badge-paid { background: #dcfce7; color: #166534; }
  .badge-damaged { background: #fee2e2; color: #991b1b; }

  .row-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .row-actions form {
    margin: 0;
  }

  .row-actions .btn {
    white-space: nowrap;
  }

  .muted {
    color: #6b7280;
    font-size: 0.92rem;
  }

  .empty-state {
    padding: 28px 16px;
    text-align: center;
    color: #6b7280;
  }

  @media (max-width: 900px) {
    .library-admin-hero {
      flex-direction: column;
    }

    .filter-bar {
      grid-template-columns: 1fr;
    }

    .library-table {
      display: block;
      overflow-x: auto;
      white-space: nowrap;
    }
  }
</style>

<div class="library-admin-shell">
  <div class="library-admin-hero">
    <div>
      <h1>Bibliotheks-Ausleihen</h1>
      <p>Nur Bibliotheksmedien. Hier kannst du offene Ausleihen abschließen, Rechnungen bezahlen und defekte Medien direkt zurücksetzen.</p>
    </div>
    <div class="hero-actions">
      <a class="btn btn-secondary" href="{{ url_for('library_view') }}">Bibliothek öffnen</a>
      <a class="btn btn-primary" href="{{ url_for('library_admin') }}">Bücher hochladen</a>
      <a class="btn btn-outline-secondary" href="{{ url_for('admin_borrowings') }}">Alle Ausleihen</a>
    </div>
  </div>

  <div class="summary-grid">
    <div class="summary-card">
      <span class="label">Ausleihen</span>
      <div class="value">{{ loan_entries|length }}</div>
    </div>
    <div class="summary-card">
      <span class="label">Defekte Medien</span>
      <div class="value">{{ damaged_items|length }}</div>
    </div>
    <div class="summary-card">
      <span class="label">Direkt reparierbar</span>
      <div class="value">{{ damaged_items|length }}</div>
    </div>
  </div>

  <div class="filter-bar">
    <input id="library-search" type="text" placeholder="Nach Element, Benutzer, Ausweis oder Rechnung suchen...">
    <select id="loan-status-filter">
      <option value="">Alle Ausleihen</option>
      <option value="active">Aktiv</option>
      <option value="planned">Geplant</option>
      <option value="completed">Abgeschlossen</option>
    </select>
    <select id="damage-filter">
      <option value="all">Alle Einträge</option>
      <option value="damage">Nur defekt</option>
      <option value="clean">Nur ohne Schaden</option>
    </select>
  </div>

  <div class="panel">
    <h2>Bibliotheks-Ausleihen</h2>
    {% if loan_entries %}
    <table class="library-table" id="loans-table">
      <thead>
        <tr>
          <th>Status</th>
          <th>Element</th>
          <th>Benutzer</th>
          <th>Zeit</th>
          <th>Rechnung</th>
          <th>Schaden</th>
          <th>Aktionen</th>
        </tr>
      </thead>
      <tbody>
        {% for e in loan_entries %}
        <tr class="loan-row" data-borrow-id="{{ e.id }}" data-item-id="{{ e.item_id }}" data-item-name="{{ e.item_name }}" data-item-code="{{ e.item_code }}" data-item-cost="{{ e.item_cost_raw }}" data-user-name="{{ e.user }}" data-search="{{ (e.item_name ~ ' ' ~ e.item_code ~ ' ' ~ e.user ~ ' ' ~ e.invoice_number ~ ' ' ~ e.item_author ~ ' ' ~ e.item_isbn)|lower }}" data-status="{{ e.status }}" data-has-damage="{{ '1' if e.has_damage else '0' }}">
          <td>
            {% if e.status == 'active' %}
              <span class="badge-pill badge-active">Aktiv</span>
            {% elif e.status == 'planned' %}
              <span class="badge-pill badge-planned">Geplant</span>
            {% else %}
              <span class="badge-pill badge-completed">Abgeschlossen</span>
            {% endif %}
          </td>
          <td>
            <div><strong>{{ e.item_name }}</strong></div>
            <div class="muted">{{ e.item_author or '—' }}</div>
            <div class="mono">{{ e.item_code or '—' }}</div>
            <div style="margin-top:6px;">
              <a class="btn btn-outline-secondary btn-sm" href="{{ url_for('library_item_invoices', item_id=e.item_id) }}">Rechnungen</a>
            </div>
          </td>
          <td>
            <div>{{ e.user }}</div>
            <div class="muted">{{ e.start }}{% if e.end %} bis {{ e.end }}{% endif %}</div>
          </td>
          <td>
            <div>{{ e.period or '—' }}</div>
            {% if e.notes %}<div class="muted">{{ e.notes }}</div>{% endif %}
          </td>
          <td>
            {% if e.invoice_number %}
              <div class="mono">{{ e.invoice_number }}</div>
              <div class="muted">{{ e.invoice_amount }}</div>
              {% if e.invoice_corrections_count %}
                <div class="muted" style="color:#7c2d12;">{{ e.invoice_corrections_count }} Korrektur(en)</div>
              {% endif %}
              <div style="margin-top:6px;">
                <a class="btn btn-outline-primary btn-sm" href="{{ url_for('admin_view_invoice_pdf', borrow_id=e.id) }}" target="_blank" rel="noopener">PDF öffnen</a>
              </div>
              {% if e.invoice_paid %}
                <span class="badge-pill badge-paid">Bezahlt</span>
                {% if e.invoice_paid_at %}<div class="muted">am {{ e.invoice_paid_at }}</div>{% endif %}
              {% else %}
                <span class="badge-pill badge-open">Offen</span>
              {% endif %}
            {% else %}
              <span class="muted">Keine Rechnung</span>
            {% endif %}
          </td>
          <td>
            {% if e.has_damage %}
              <span class="badge-pill badge-damaged">{{ e.damage_count }} Schaden{% if e.damage_count != 1 %}s{% endif %}</span>
              {% if e.damage_text %}<div class="muted" style="margin-top:6px;">{{ e.damage_text }}</div>{% endif %}
            {% else %}
              <span class="muted">Kein Schaden</span>
            {% endif %}
          </td>
          <td>
            <div class="row-actions">
              {% if e.status == 'active' %}
              <button type="button" class="btn btn-outline-danger btn-sm" onclick="openDamageReportPrompt(this)">Schaden melden</button>
              {% endif %}
              {% if e.invoice_number and ((not e.invoice_paid) or e.has_damage) %}
              <form method="post" action="{{ url_for('admin_finalize_invoice_and_repair', borrow_id=e.id) }}" onsubmit="return confirm('Rechnung als bezahlt und Element als repariert markieren?');">
                <button type="submit" class="btn btn-success btn-sm">
                  {% if not e.invoice_paid and e.has_damage %}
                    Bezahlt + repariert
                  {% elif not e.invoice_paid %}
                    Als bezahlt markieren
                  {% else %}
                    Als repariert markieren
                  {% endif %}
                </button>
              </form>
              {% elif e.has_damage %}
              <form method="post" action="{{ url_for('mark_damage_repaired', id=e.item_id) }}" onsubmit="return confirm('Medium als repariert markieren?');">
                <button type="submit" class="btn btn-success btn-sm">Als repariert markieren</button>
              </form>
              {% endif %}

              {% if e.invoice_number %}
              <form method="post" action="{{ url_for('admin_add_invoice_correction', borrow_id=e.id) }}" onsubmit="return confirm('Korrekturbuchung hinzufügen?');">
                <input type="text" name="correction_reason" placeholder="Korrekturgrund" required style="padding:6px; border:1px solid #ddd; border-radius:6px; min-width:140px;">
                <input type="text" name="amount_delta" placeholder="Delta optional" style="padding:6px; border:1px solid #ddd; border-radius:6px; width:120px;">
                <button type="submit" class="btn btn-outline-danger btn-sm">Korrektur</button>
              </form>
              {% endif %}

              {% if e.status in ['active', 'planned'] %}
              <form method="post" action="{{ url_for('admin_reset_borrowing', borrow_id=e.id) }}" onsubmit="return confirm('Ausleihe zurücksetzen?');">
                <button type="submit" class="btn btn-warning btn-sm">Zurücksetzen</button>
              </form>
              {% endif %}
            </div>
          </td>
        </tr>
        {% endfor %}
      </tbody>
    </table>
    <div id="loans-empty" class="empty-state" style="display:none;">Keine passenden Bibliotheks-Ausleihen gefunden.</div>
    {% else %}
      <div class="empty-state">Keine Bibliotheks-Ausleihen gefunden.</div>
    {% endif %}
  </div>

  <div class="panel">
    <h2>Defekte Bibliotheksmedien ohne aktive Ausleihe</h2>
    {% if damaged_items %}
    <table class="library-table" id="damaged-table">
      <thead>
        <tr>
          <th>Element</th>
          <th>Code</th>
          <th>Schaden</th>
          <th>Status</th>
          <th>Aktion</th>
        </tr>
      </thead>
      <tbody>
        {% for item in damaged_items %}
        <tr class="damaged-row" data-search="{{ (item.name ~ ' ' ~ item.code ~ ' ' ~ item.author ~ ' ' ~ item.isbn ~ ' ' ~ item.damage_text)|lower }}" data-status="damage" data-has-damage="1">
          <td>
            <div><strong>{{ item.name }}</strong></div>
            <div class="muted">{{ item.author or '—' }}</div>
            <div class="muted">{{ item.isbn or '—' }}</div>
          </td>
          <td class="mono">{{ item.code or '—' }}</td>
          <td>
            <span class="badge-pill badge-damaged">{{ item.damage_count }} Schaden{% if item.damage_count != 1 %}s{% endif %}</span>
            {% if item.damage_text %}<div class="muted" style="margin-top:6px;">{{ item.damage_text }}</div>{% endif %}
          </td>
          <td>
            {% if item.available %}
              <span class="badge-pill badge-completed">Bereit zum Zurücksetzen</span>
            {% else %}
              <span class="badge-pill badge-open">Nicht verfügbar</span>
            {% endif %}
            {% if item.last_updated %}<div class="muted" style="margin-top:6px;">{{ item.last_updated }}</div>{% endif %}
          </td>
          <td>
            <div class="row-actions" style="margin-bottom:8px;">
              <a class="btn btn-outline-secondary btn-sm" href="{{ url_for('library_item_invoices', item_id=item.id) }}">Rechnungen</a>
            </div>
            <form method="post" action="{{ url_for('mark_damage_repaired', id=item.id) }}" onsubmit="return confirm('Dieses Medium als repariert und wieder verfügbar markieren?');">
              <button type="submit" class="btn btn-success btn-sm">Als repariert markieren</button>
            </form>
          </td>
        </tr>
        {% endfor %}
      </tbody>
    </table>
    <div id="damaged-empty" class="empty-state" style="display:none;">Keine passenden defekten Medien gefunden.</div>
    {% else %}
      <div class="empty-state">Keine defekten Bibliotheksmedien ohne aktive Ausleihe gefunden.</div>
    {% endif %}
  </div>
</div>

<div id="damage-invoice-modal" style="display:none; position:fixed; inset:0; background:rgba(15,23,42,0.72); z-index:9999; padding:20px; overflow:auto;">
  <div style="max-width:760px; margin:40px auto; background: var(--ui-surface); border-radius:12px; padding:24px; box-shadow:0 20px 60px rgba(0,0,0,0.3);">
    <div style="display:flex; justify-content:space-between; align-items:center; gap:12px; margin-bottom:18px;">
      <div>
        <h2 style="margin:0;">Rechnung erstellen</h2>
        <p style="margin:6px 0 0; color:#666;">Die Rechnung nutzt das bestehende Rechnungssystem und kann direkt nach der Schadensmeldung erstellt werden.</p>
      </div>
      <button type="button" class="btn btn-secondary" onclick="closeDamageInvoiceModal()">Schließen</button>
    </div>

    <form id="damage-invoice-form" method="post" action="">
      <div style="display:grid; grid-template-columns:repeat(auto-fit, minmax(240px, 1fr)); gap:16px; margin-bottom:16px;">
        <div>
          <label for="damage-invoice-item" style="display:block; font-weight:700; margin-bottom:6px;">Element</label>
          <input id="damage-invoice-item" type="text" readonly style="width:100%; padding:10px; border:1px solid #ddd; border-radius:6px; background: var(--ui-surface-soft);">
        </div>
        <div>
          <label for="damage-invoice-borrower" style="display:block; font-weight:700; margin-bottom:6px;">Schüler</label>
          <input id="damage-invoice-borrower" type="text" readonly style="width:100%; padding:10px; border:1px solid #ddd; border-radius:6px; background: var(--ui-surface-soft);">
        </div>
        <div>
          <label for="damage-invoice-code" style="display:block; font-weight:700; margin-bottom:6px;">Element-ID / Code</label>
          <input id="damage-invoice-code" type="text" readonly style="width:100%; padding:10px; border:1px solid #ddd; border-radius:6px; background: var(--ui-surface-soft);">
        </div>
        <div>
          <label for="damage-invoice-amount" style="display:block; font-weight:700; margin-bottom:6px;">Preis</label>
          <input id="damage-invoice-amount" name="invoice_amount" type="text" required style="width:100%; padding:10px; border:1px solid #ddd; border-radius:6px;" placeholder="z.B. 12,50">
        </div>
      </div>

      <div style="margin-bottom:16px;">
        <label for="damage-invoice-reason" style="display:block; font-weight:700; margin-bottom:6px;">Schadensbeschreibung</label>
        <textarea id="damage-invoice-reason" name="damage_reason" rows="5" required style="width:100%; padding:10px; border:1px solid #ddd; border-radius:6px; resize:vertical;" placeholder="Beschreiben Sie kurz den Schaden oder die Zerstörung."></textarea>
      </div>

      <div style="display:flex; flex-wrap:wrap; gap:16px; align-items:center; margin-bottom:18px;">
        <label style="display:flex; align-items:center; gap:8px;">
          <input id="damage-invoice-destroyed" type="checkbox" name="mark_destroyed" checked>
          Element als zerstört markieren
        </label>
        <label style="display:flex; align-items:center; gap:8px;">
          <input id="damage-invoice-close" type="checkbox" name="close_borrowing" checked>
          Ausleihe abschließen
        </label>
      </div>

      <div style="display:flex; justify-content:flex-end; gap:10px;">
        <button type="button" class="btn btn-secondary" onclick="closeDamageInvoiceModal()">Abbrechen</button>
        <button type="submit" class="btn btn-danger">PDF-Rechnung erstellen</button>
      </div>
    </form>
  </div>
</div>

<script>
(function() {
  const searchInput = document.getElementById('library-search');
  const statusFilter = document.getElementById('loan-status-filter');
  const damageFilter = document.getElementById('damage-filter');
  const loanRows = Array.from(document.querySelectorAll('.loan-row'));
  const damagedRows = Array.from(document.querySelectorAll('.damaged-row'));
  const loansEmpty = document.getElementById('loans-empty');
  const damagedEmpty = document.getElementById('damaged-empty');
  const damageInvoiceModal = document.getElementById('damage-invoice-modal');
  const damageInvoiceForm = document.getElementById('damage-invoice-form');
  const damageInvoiceItem = document.getElementById('damage-invoice-item');
  const damageInvoiceBorrower = document.getElementById('damage-invoice-borrower');
  const damageInvoiceCode = document.getElementById('damage-invoice-code');
  const damageInvoiceAmount = document.getElementById('damage-invoice-amount');
  const damageInvoiceReason = document.getElementById('damage-invoice-reason');

  function openDamageReportPrompt(button) {
    const row = button.closest('.loan-row');
    if (!row) {
      return;
    }

    const itemId = row.dataset.itemId || '';
    const itemName = row.dataset.itemName || 'Bibliotheksmedium';
    const noteInput = prompt('Schadensmeldung für dieses Bibliotheksmedium:\nNotiz zum Schaden (optional):', '');

    if (noteInput === null) {
      return;
    }

    const description = noteInput.trim() || 'Schaden erneut gemeldet';

    fetch(`/report_damage/${itemId}`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ description })
    })
      .then(response => response.json().then(data => ({ ok: response.ok, data })))
      .then(({ ok, data }) => {
        if (!ok || !data.success) {
          throw new Error(data.message || 'Fehler beim Speichern der Schadensmeldung.');
        }

        if (confirm('Schaden gespeichert. Soll direkt eine Rechnung erstellt werden?')) {
          openDamageInvoiceModal(row, description);
          return;
        }

        window.location.reload();
      })
      .catch(error => {
        alert(error.message || 'Fehler beim Speichern der Schadensmeldung.');
      });
  }

  window.openDamageReportPrompt = openDamageReportPrompt;

  function openDamageInvoiceModal(row, description) {
    if (!damageInvoiceModal || !damageInvoiceForm) {
      return;
    }

    const borrowId = row.dataset.borrowId || '';
    const itemName = row.dataset.itemName || '';
    const borrower = row.dataset.userName || '';
    const itemCode = row.dataset.itemCode || '';
    const itemCost = row.dataset.itemCost || '';

    damageInvoiceForm.action = "{{ url_for('admin_create_invoice', borrow_id='__BORROW_ID__') }}".replace('__BORROW_ID__', borrowId);
    damageInvoiceItem.value = itemName;
    damageInvoiceBorrower.value = borrower;
    damageInvoiceCode.value = itemCode;
    damageInvoiceAmount.value = String(itemCost).replace(' EUR', '').trim();
    damageInvoiceReason.value = description || `Schaden gemeldet für ${itemName}`;
    damageInvoiceModal.style.display = 'block';
    damageInvoiceAmount.focus();
  }

  window.openDamageInvoiceModal = openDamageInvoiceModal;

  function closeDamageInvoiceModal() {
    if (damageInvoiceModal) {
      damageInvoiceModal.style.display = 'none';
    }
  }

  if (damageInvoiceModal) {
    damageInvoiceModal.addEventListener('click', function(event) {
      if (event.target === damageInvoiceModal) {
        closeDamageInvoiceModal();
      }
    });
  }

  window.closeDamageInvoiceModal = closeDamageInvoiceModal;

  function applyFilters() {
    const search = (searchInput.value || '').trim().toLowerCase();
    const status = statusFilter.value;
    const damage = damageFilter.value;

    let visibleLoans = 0;
    loanRows.forEach(row => {
      const haystack = row.dataset.search || '';
      const rowStatus = row.dataset.status || '';
      const hasDamage = row.dataset.hasDamage === '1';
      const searchMatch = !search || haystack.includes(search);
      const statusMatch = !status || rowStatus === status;
      const damageMatch = damage === 'all' || (damage === 'damage' && hasDamage) || (damage === 'clean' && !hasDamage);
      const show = searchMatch && statusMatch && damageMatch;
      row.style.display = show ? '' : 'none';
      if (show) visibleLoans++;
    });
    if (loansEmpty) loansEmpty.style.display = visibleLoans === 0 ? 'block' : 'none';

    let visibleDamaged = 0;
    damagedRows.forEach(row => {
      const haystack = row.dataset.search || '';
      const rowStatus = row.dataset.status || '';
      const hasDamage = row.dataset.hasDamage === '1';
      const searchMatch = !search || haystack.includes(search);
      const statusMatch = !status || rowStatus === status || status === '';
      const damageMatch = damage === 'all' || (damage === 'damage' && hasDamage) || (damage === 'clean' && !hasDamage);
      const show = searchMatch && statusMatch && damageMatch;
      row.style.display = show ? '' : 'none';
      if (show) visibleDamaged++;
    });
    if (damagedEmpty) damagedEmpty.style.display = visibleDamaged === 0 ? 'block' : 'none';
  }

  searchInput.addEventListener('input', applyFilters);
  statusFilter.addEventListener('change', applyFilters);
  damageFilter.addEventListener('change', applyFilters);
  applyFilters();
})();
</script>
{% endblock %}