"""
School Module - Attendance Page
Attendance tracking for students
"""

from ..styles import SCHOOL_BASE_STYLES, ATTENDANCE_STYLES
from ..templates import ICONS, render_base_page, COMMON_SCRIPTS


def attendance_page() -> str:
    """Attendance tracking page"""
    styles = SCHOOL_BASE_STYLES + ATTENDANCE_STYLES

    content = f'''
    <main class="main-content">
      <div class="page-header">
        <div>
          <h1 class="page-title">Anwesenheit</h1>
          <p class="page-subtitle">Erfassen Sie die Anwesenheit Ihrer Schüler</p>
        </div>
        <button class="btn btn-success" onclick="saveAttendance()">
          {ICONS['check']}
          Speichern
        </button>
      </div>

      <!-- Controls -->
      <div class="controls">
        <div class="select-wrapper">
          <select id="class-select" onchange="loadClass()">
            <option value="5a">Klasse 5a</option>
            <option value="5b">Klasse 5b</option>
            <option value="6a">Klasse 6a</option>
          </select>
        </div>
        <div class="select-wrapper">
          <select id="lesson-select">
            <option value="1">1. Stunde (08:00 - 08:45)</option>
            <option value="2">2. Stunde (08:50 - 09:35)</option>
            <option value="3">3. Stunde (09:50 - 10:35)</option>
            <option value="4">4. Stunde (10:40 - 11:25)</option>
            <option value="5">5. Stunde (11:40 - 12:25)</option>
            <option value="6">6. Stunde (12:30 - 13:15)</option>
          </select>
        </div>
        <input type="date" id="date-select" onchange="loadAttendance()">
      </div>

      <!-- Stats Bar -->
      <div class="stats-bar">
        <div class="stat-item">
          <span class="stat-dot present"></span>
          <span class="stat-value" id="count-present">24</span>
          <span class="stat-label">Anwesend</span>
        </div>
        <div class="stat-item">
          <span class="stat-dot absent"></span>
          <span class="stat-value" id="count-absent">1</span>
          <span class="stat-label">Abwesend</span>
        </div>
        <div class="stat-item">
          <span class="stat-dot late"></span>
          <span class="stat-value" id="count-late">1</span>
          <span class="stat-label">Verspätet</span>
        </div>
        <div class="stat-item">
          <span class="stat-dot excused"></span>
          <span class="stat-value" id="count-excused">0</span>
          <span class="stat-label">Entschuldigt</span>
        </div>
      </div>

      <!-- Attendance Table -->
      <div class="card" style="padding: 0;">
        <div class="card-header" style="padding: 1rem 1.5rem; border-bottom: 1px solid var(--bp-border);">
          <span class="card-title">Schülerliste</span>
          <button class="btn btn-secondary" onclick="markAllPresent()">Alle anwesend</button>
        </div>
        <table>
          <thead>
            <tr>
              <th>Schüler</th>
              <th>Status</th>
              <th>Anmerkung</th>
            </tr>
          </thead>
          <tbody id="student-list">
            <!-- Dynamisch geladen -->
          </tbody>
        </table>
      </div>
    </main>

    <div id="toast" class="toast"></div>'''

    scripts = COMMON_SCRIPTS + '''
    <script>
      // Sample student data
      const students = [
        { id: 1, name: 'Anna Schmidt', number: 1 },
        { id: 2, name: 'Ben Müller', number: 2 },
        { id: 3, name: 'Clara Weber', number: 3 },
        { id: 4, name: 'David Fischer', number: 4 },
        { id: 5, name: 'Emma Becker', number: 5 },
        { id: 6, name: 'Felix Braun', number: 6 },
        { id: 7, name: 'Greta Hoffmann', number: 7 },
        { id: 8, name: 'Hans Schneider', number: 8 },
        { id: 9, name: 'Ida Wagner', number: 9 },
        { id: 10, name: 'Jonas Koch', number: 10 },
        { id: 11, name: 'Klara Bauer', number: 11 },
        { id: 12, name: 'Leon Richter', number: 12 },
        { id: 13, name: 'Mia Klein', number: 13 },
        { id: 14, name: 'Noah Wolf', number: 14 },
        { id: 15, name: 'Olivia Meier', number: 15 },
        { id: 16, name: 'Paul Neumann', number: 16 },
        { id: 17, name: 'Quirin Schwarz', number: 17 },
        { id: 18, name: 'Rosa Zimmermann', number: 18 },
        { id: 19, name: 'Samuel Krüger', number: 19 },
        { id: 20, name: 'Tina Lange', number: 20 },
        { id: 21, name: 'Uwe Peters', number: 21 },
        { id: 22, name: 'Vera Meyer', number: 22 },
        { id: 23, name: 'Wilhelm Schulz', number: 23 },
        { id: 24, name: 'Xenia Huber', number: 24 },
        { id: 25, name: 'Yannik Fuchs', number: 25 },
        { id: 26, name: 'Zoe Berger', number: 26 }
      ];

      // Attendance state
      let attendance = {};

      // Initialize
      document.addEventListener('DOMContentLoaded', () => {
        const today = new Date().toISOString().split('T')[0];
        document.getElementById('date-select').value = today;

        students.forEach(s => {
          attendance[s.id] = { status: 'present', notes: '' };
        });

        attendance[1] = { status: 'absent', notes: '' };
        attendance[3] = { status: 'late', notes: '10 Minuten' };

        renderStudentList();
        updateStats();
      });

      function renderStudentList() {
        const tbody = document.getElementById('student-list');
        tbody.innerHTML = students.map(student => {
          const att = attendance[student.id] || { status: 'present', notes: '' };
          return `
            <tr>
              <td>
                <div class="student-info">
                  <div class="student-avatar">${getInitials(student.name)}</div>
                  <div>
                    <div class="student-name">${student.name}</div>
                    <div class="student-number">Nr. ${student.number}</div>
                  </div>
                </div>
              </td>
              <td>
                <div class="status-toggle">
                  <button class="status-btn present ${att.status === 'present' ? 'active' : ''}"
                          onclick="setStatus(${student.id}, 'present')">Anwesend</button>
                  <button class="status-btn absent ${att.status === 'absent' ? 'active' : ''}"
                          onclick="setStatus(${student.id}, 'absent')">Abwesend</button>
                  <button class="status-btn late ${att.status === 'late' ? 'active' : ''}"
                          onclick="setStatus(${student.id}, 'late')">Verspätet</button>
                  <button class="status-btn excused ${att.status === 'excused' ? 'active' : ''}"
                          onclick="setStatus(${student.id}, 'excused')">Entschuldigt</button>
                </div>
              </td>
              <td>
                <input type="text" class="notes-input" placeholder="Anmerkung..."
                       value="${att.notes}"
                       onchange="setNotes(${student.id}, this.value)">
              </td>
            </tr>
          `;
        }).join('');
      }

      function setStatus(studentId, status) {
        attendance[studentId] = {
          ...attendance[studentId],
          status: status
        };
        renderStudentList();
        updateStats();
      }

      function setNotes(studentId, notes) {
        attendance[studentId] = {
          ...attendance[studentId],
          notes: notes
        };
      }

      function markAllPresent() {
        students.forEach(s => {
          attendance[s.id] = { status: 'present', notes: '' };
        });
        renderStudentList();
        updateStats();
      }

      function updateStats() {
        const counts = { present: 0, absent: 0, late: 0, excused: 0 };
        Object.values(attendance).forEach(a => {
          counts[a.status]++;
        });

        document.getElementById('count-present').textContent = counts.present;
        document.getElementById('count-absent').textContent = counts.absent;
        document.getElementById('count-late').textContent = counts.late;
        document.getElementById('count-excused').textContent = counts.excused;
      }

      function loadClass() {
        showToast('Klasse wird geladen...');
      }

      function loadAttendance() {
        showToast('Anwesenheit wird geladen...');
      }

      async function saveAttendance() {
        const classId = document.getElementById('class-select').value;
        const lessonId = document.getElementById('lesson-select').value;
        const date = document.getElementById('date-select').value;

        const records = Object.entries(attendance).map(([studentId, att]) => ({
          student_id: studentId,
          status: att.status,
          notes: att.notes,
          lesson_number: parseInt(lessonId),
          date: date
        }));

        try {
          showToast('Anwesenheit gespeichert!', 'success');
        } catch (error) {
          showToast('Fehler beim Speichern', 'error');
        }
      }
    </script>'''

    return render_base_page("Anwesenheit", styles, content, scripts, "attendance")