// schedules.js — 예약 작업(cron) 목록/생성/수정/삭제.
// extracted from app.js (v4.3.19-3 split).

let schedules = [];
let editingScheduleId = null;

async function refreshSchedules() {
  try {
    const result = await api('/api/schedules');
    if (result.success && Array.isArray(result.schedules)) {
      schedules = result.schedules;
      renderScheduleList();
    }
  } catch (err) {
    console.error('Failed to load schedules:', err);
  }
}

function renderScheduleList() {
  const list = document.getElementById('schedule-list');
  const count = document.getElementById('schedule-count');
  if (!list) return;

  if (schedules.length === 0) {
    list.innerHTML = '<div class="empty-state" style="text-align:center;color:var(--muted);padding:40px 20px">No schedules yet. <strong>+ 새 일정</strong> to get started.</div>';
    if (count) count.textContent = '0 schedules';
    return;
  }

  if (count) count.textContent = `${schedules.length} schedule${schedules.length !== 1 ? 's' : ''}`;

  list.innerHTML = schedules.map(job => {
    const nextRun = job.next_run ? new Date(job.next_run).toLocaleString() : 'Never';
    const lastRun = job.last_run ? new Date(job.last_run).toLocaleString() : 'Never';
    const statusClass = job.status === 'active' ? 'status-active' : job.status === 'paused' ? 'status-paused' : 'status-failed';
    
    return `
      <div style="display:flex;align-items:start;justify-content:space-between;gap:12px;padding:12px;background:var(--panel);border:1px solid var(--line);border-radius:10px;cursor:pointer" onclick="editSchedule('${job.id}')">
        <div style="flex:1;min-width:0">
          <div style="display:flex;align-items:center;gap:8px;margin-bottom:6px">
            <div style="font-weight:700;font-size:13px">${job.name || 'Untitled'}</div>
            <span class="${statusClass}" style="font-size:10px;font-weight:700;padding:2px 8px;border-radius:6px;${job.status === 'active' ? 'background:#c8f0c4;color:#0d5c2f' : job.status === 'paused' ? 'background:#fff4d6;color:#7d5700' : 'background:#ffd6d6;color:#8b0000'}">${job.status || 'unknown'}</span>
          </div>
          <div style="font-size:12px;color:var(--muted);line-height:1.4;margin-bottom:6px">${job.prompt ? job.prompt.slice(0, 60) + (job.prompt.length > 60 ? '...' : '') : 'No prompt'}</div>
          <div style="display:grid;grid-template-columns:1fr 1fr;gap:12px;font-size:11px;color:var(--muted)">
            <div><strong>Next:</strong> ${nextRun}</div>
            <div><strong>Last:</strong> ${lastRun}</div>
          </div>
        </div>
        <div style="display:flex;flex-direction:column;gap:6px;flex-shrink:0">
          <button onclick="event.stopPropagation(); runScheduleNow('${job.id}')" style="border:1px solid var(--line);background:var(--panel-2);color:var(--muted);border-radius:6px;padding:4px 10px;font-size:11px;font-weight:600;cursor:pointer;white-space:nowrap" title="Run now">Run Now</button>
          <button onclick="event.stopPropagation(); toggleSchedulePause('${job.id}')" style="border:1px solid var(--line);background:var(--panel-2);color:var(--muted);border-radius:6px;padding:4px 10px;font-size:11px;font-weight:600;cursor:pointer;white-space:nowrap" title="Toggle pause">${job.status === 'active' ? 'Pause' : 'Resume'}</button>
          <button onclick="event.stopPropagation(); deleteSchedule('${job.id}')" style="border:1px solid #ff6b6b;background:#ffe0e0;color:#8b0000;border-radius:6px;padding:4px 10px;font-size:11px;font-weight:600;cursor:pointer;white-space:nowrap" title="Delete">삭제</button>
        </div>
      </div>
    `;
  }).join('');
}

function openScheduleCreateModal() {
  editingScheduleId = null;
  document.getElementById('schedule-modal-title').textContent = '일정 생성';
  document.getElementById('schedule-save-btn').textContent = '일정 생성';
  document.getElementById('schedule-name').value = '';
  document.getElementById('schedule-pattern').value = '';
  document.getElementById('schedule-prompt').value = '';
  document.getElementById('schedule-timezone').value = 'UTC';
  document.getElementById('schedule-channel').value = 'web';
  document.getElementById('schedule-pattern-preview').style.display = 'none';
  document.getElementById('schedule-modal').style.display = 'flex';
}

function editSchedule(jobId) {
  const job = schedules.find(j => j.id === jobId);
  if (!job) return;
  
  editingScheduleId = jobId;
  document.getElementById('schedule-modal-title').textContent = '일정 편집';
  document.getElementById('schedule-save-btn').textContent = '변경 저장';
  document.getElementById('schedule-name').value = job.name || '';
  document.getElementById('schedule-pattern').value = job.cron || job.run_at || '';
  document.getElementById('schedule-prompt').value = job.prompt || '';
  document.getElementById('schedule-timezone').value = job.timezone || 'UTC';
  document.getElementById('schedule-channel').value = job.delivery_channel || 'web';
  document.getElementById('schedule-pattern-preview').style.display = 'none';
  document.getElementById('schedule-modal').style.display = 'flex';
}

function closeScheduleModal() {
  document.getElementById('schedule-modal').style.display = 'none';
  editingScheduleId = null;
}

async function parseSchedulePattern() {
  const pattern = document.getElementById('schedule-pattern').value.trim();
  const timezone = document.getElementById('schedule-timezone').value;
  if (!pattern) {
    alert('Enter a schedule pattern (e.g., "daily at 09:00" or "0 9 * * *")');
    return;
  }
  
  try {
    const result = await api('/api/schedules/parse', {
      method: 'POST',
      body: JSON.stringify({ text: pattern, timezone })
    });
    
    const preview = document.getElementById('schedule-pattern-preview');
    if (result.success) {
      preview.textContent = `✓ ${result.preview || result.human_text || 'Valid pattern'}`;
      preview.style.display = 'block';
      preview.style.color = 'var(--muted)';
    } else {
      preview.textContent = `⚠ ${result.error || 'Invalid pattern'}`;
      preview.style.display = 'block';
      preview.style.color = '#ff6b6b';
    }
  } catch (err) {
    document.getElementById('schedule-pattern-preview').textContent = '⚠ Parse failed';
    document.getElementById('schedule-pattern-preview').style.display = 'block';
    document.getElementById('schedule-pattern-preview').style.color = '#ff6b6b';
  }
}

async function saveSchedule() {
  const name = document.getElementById('schedule-name').value.trim();
  const pattern = document.getElementById('schedule-pattern').value.trim();
  const prompt = document.getElementById('schedule-prompt').value.trim();
  const timezone = document.getElementById('schedule-timezone').value;
  const channel = document.getElementById('schedule-channel').value;
  
  if (!name) return alert('Schedule name is required');
  if (!pattern) return alert('Schedule pattern is required');
  if (!prompt) return alert('Prompt/action is required');
  
  const method = editingScheduleId ? 'PUT' : 'POST';
  const path = editingScheduleId ? `/api/schedules/${editingScheduleId}` : '/api/schedules';
  
  try {
    const result = await api(path, {
      method,
      body: JSON.stringify({
        name,
        pattern,
        prompt,
        timezone,
        delivery_channel: channel,
        confirm: true  // Confirmation (as per scheduler rules)
      })
    });
    
    if (result.success) {
      closeScheduleModal();
      await refreshSchedules();
    } else {
      alert('Error: ' + (result.error || 'Unknown error'));
    }
  } catch (err) {
    alert('Failed to save schedule: ' + err.message);
  }
}

async function deleteSchedule(jobId) {
  if (!confirm('Delete this schedule? This action cannot be undone.')) return;
  
  try {
    const result = await api(`/api/schedules/${jobId}`, {
      method: 'DELETE',
      body: JSON.stringify({ confirm: true })
    });
    
    if (result.success) {
      await refreshSchedules();
    } else {
      alert('Error: ' + (result.error || 'Failed to delete'));
    }
  } catch (err) {
    alert('Failed to delete schedule: ' + err.message);
  }
}

async function toggleSchedulePause(jobId) {
  const job = schedules.find(j => j.id === jobId);
  if (!job) return;
  
  const newStatus = job.status === 'active' ? 'paused' : 'active';
  
  try {
    const result = await api(`/api/schedules/${jobId}`, {
      method: 'PATCH',
      body: JSON.stringify({ status: newStatus })
    });
    
    if (result.success) {
      await refreshSchedules();
    } else {
      alert('Error: ' + (result.error || 'Failed to update'));
    }
  } catch (err) {
    alert('Failed to toggle pause: ' + err.message);
  }
}

async function runScheduleNow(jobId) {
  try {
    const result = await api(`/api/schedules/${jobId}/run`, {
      method: 'POST',
      body: JSON.stringify({})
    });
    
    if (result.success) {
      await refreshSchedules();
      alert('Schedule running now...');
    } else {
      alert('Error: ' + (result.error || 'Failed to run'));
    }
  } catch (err) {
    alert('Failed to run schedule: ' + err.message);
  }
}