{% extends "layout.twig" %}
{% block title %}{{ server.name }}{% endblock %}
{% block content %}
<div class="max-w-7xl mx-auto px-4 py-8">
  <div class="mb-6"><h1 class="text-3xl font-bold">{{ server.name }}</h1><p class="text-gray-600">{{ server.host }}</p></div>
  
  {% if import_message %}
  <div class="mb-6 {% if import_message.type == 'success' %}bg-green-50 border-green-400 text-green-700{% else %}bg-red-50 border-red-400 text-red-700{% endif %} border px-4 py-3 rounded">
    <i class="fas {% if import_message.type == 'success' %}fa-check-circle{% else %}fa-exclamation-circle{% endif %} mr-2"></i>
    {{ import_message.text }}
  </div>
  {% endif %}
  
  <div class="grid grid-cols-1 md:grid-cols-2 gap-6 mb-8">
    <div class="bg-white rounded shadow p-6">
      <h3 class="font-bold mb-4">Server Info</h3>
      <dl class="space-y-2">
        <div><dt class="text-sm text-gray-600">Status</dt><dd><span class="px-2 py-1 bg-green-100 text-green-800 rounded text-sm">{{ server.status }}</span></dd></div>
        <div><dt class="text-sm text-gray-600">VPN Port</dt><dd>{{ server.vpn_port }}</dd></div>
        <div><dt class="text-sm text-gray-600">Subnet</dt><dd>{{ server.vpn_subnet }}</dd></div>
      </dl>
    </div>
    <div class="bg-white rounded shadow p-6">
      <h3 class="font-bold mb-4">{{ t('clients.create') }}</h3>
      <form method="POST" action="/servers/{{ server.id }}/clients/create" class="space-y-3" id="createClientForm">
        <div>
          <input name="name" placeholder="{{ t('clients.name') }}" required class="w-full px-3 py-2 border rounded" id="clientName" pattern="[a-zA-Z0-9_-]+" title="Only letters, numbers, underscore and dash allowed">
          <p class="text-xs text-gray-500 mt-1">Spaces and special characters will be replaced with underscore</p>
        </div>
        <div>
          <label class="block text-sm text-gray-600 mb-1">{{ t('clients.expiration') }}</label>
          <select name="expires_in_days" class="w-full px-3 py-2 border rounded mb-2" id="expirationSelect" onchange="toggleExpirationInput()">
            <option value="" selected>{{ t('clients.never_expires') }}</option>
            <option value="7">7 {{ t('common.days') }}</option>
            <option value="30">30 {{ t('common.days') }}</option>
            <option value="60">60 {{ t('common.days') }}</option>
            <option value="90">90 {{ t('common.days') }}</option>
            <option value="180">180 {{ t('common.days') }}</option>
            <option value="365">365 {{ t('common.days') }}</option>
            <option value="custom">{{ t('clients.custom_seconds') }}</option>
          </select>
          <input type="number" name="expires_in_seconds" id="expirationSeconds" class="w-full px-3 py-2 border rounded" placeholder="{{ t('clients.enter_seconds') }}" style="display:none;" min="1">
        </div>
        <div>
          <label class="block text-sm text-gray-600 mb-1">{{ t('clients.traffic_limit') }}</label>
          <select name="traffic_limit_gb" class="w-full px-3 py-2 border rounded mb-2" id="trafficSelect" onchange="toggleTrafficInput()">
            <option value="" selected>{{ t('clients.unlimited') }}</option>
            <option value="1">1 GB</option>
            <option value="5">5 GB</option>
            <option value="10">10 GB</option>
            <option value="25">25 GB</option>
            <option value="50">50 GB</option>
            <option value="100">100 GB</option>
            <option value="250">250 GB</option>
            <option value="500">500 GB</option>
            <option value="1000">1000 GB (1 TB)</option>
            <option value="custom">{{ t('clients.custom_mb') }}</option>
          </select>
          <input type="number" name="traffic_limit_mb" id="trafficMegabytes" class="w-full px-3 py-2 border rounded" placeholder="{{ t('clients.enter_megabytes') }}" style="display:none;" min="1">
        </div>
        <button type="submit" class="gradient-bg text-white px-4 py-2 rounded w-full" id="createClientBtn">
          <span id="createClientText">{{ t('form.create') }}</span>
          <i class="fas fa-spinner fa-spin" id="createClientSpinner" style="display:none;"></i>
        </button>
      </form>
    </div>
  </div>
  
  <!-- Backup Section -->
  <div class="bg-white rounded shadow mb-8">
    <div class="px-6 py-4 border-b flex justify-between items-center">
      <h3 class="font-bold">{{ t('backups.title') }}</h3>
      <button onclick="createBackup({{ server.id }})" class="gradient-bg text-white px-4 py-2 rounded text-sm">
        <i class="fas fa-save"></i> {{ t('backups.create') }}
      </button>
    </div>
    <div id="backupsList" class="p-4">
      <div class="text-center text-gray-500 py-4">
        <i class="fas fa-spinner fa-spin"></i> {{ t('form.loading') }}
      </div>
    </div>
  </div>
  <div class="bg-white rounded shadow">
    <div class="px-6 py-4 border-b flex justify-between items-center">
      <h3 class="font-bold">{{ t('clients.title') }} ({{ clients|length }})</h3>
      <button onclick="syncAllStats({{ server.id }})" class="text-purple-600 hover:text-purple-800 text-sm">
        <i class="fas fa-sync-alt"></i> {{ t('clients.sync_stats') }}
      </button>
    </div>
    {% if clients|length > 0 %}
    <table class="w-full">
      <thead class="bg-gray-50">
        <tr>
          <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">{{ t('clients.name') }}</th>
          <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">{{ t('clients.ip') }}</th>
          <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">{{ t('clients.status') }}</th>
          <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">{{ t('clients.expiration') }}</th>
          <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">{{ t('clients.traffic') }}</th>
          <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">{{ t('clients.traffic_limit') }}</th>
          <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">{{ t('clients.last_handshake') }}</th>
          <th class="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">{{ t('clients.actions') }}</th>
        </tr>
      </thead>
      <tbody>
        {% for client in clients %}
        <tr class="border-t">
          <td class="px-6 py-4">{{ client.name }}</td>
          <td class="px-6 py-4">{{ client.client_ip }}</td>
          <td class="px-6 py-4">
            {% if client.status == 'active' %}
              <span class="px-2 py-1 bg-green-100 text-green-800 rounded text-xs">{{ t('status.active') }}</span>
            {% else %}
              <span class="px-2 py-1 bg-red-100 text-red-800 rounded text-xs">{{ t('status.disabled') }}</span>
            {% endif %}
          </td>
          <td class="px-6 py-4 text-sm">
            {% if client.expires_at %}
              {% set expires_ts = client.expires_at|date('U') %}
              {% set now_ts = "now"|date('U') %}
              {% set diff_days = ((expires_ts - now_ts) / 86400)|round %}
              
              {% if diff_days < 0 %}
                <span class="px-2 py-1 bg-red-100 text-red-800 rounded text-xs">
                  <i class="fas fa-exclamation-circle"></i> {{ t('clients.expired') }}
                </span>
              {% elseif diff_days <= 7 %}
                <span class="px-2 py-1 bg-yellow-100 text-yellow-800 rounded text-xs">
                  <i class="fas fa-clock"></i> {{ diff_days }} {{ t('common.days') }}
                </span>
              {% else %}
                <span class="text-gray-600">{{ client.expires_at|date('Y-m-d') }}</span>
              {% endif %}
            {% else %}
              <span class="text-gray-400">{{ t('clients.never_expires') }}</span>
            {% endif %}
          </td>
          <td class="px-6 py-4 text-sm">
            <div class="text-gray-600">
              ↑ {{ (client.bytes_sent|default(0) / 1024 / 1024)|number_format(2) }} MB
            </div>
            <div class="text-gray-600">
              ↓ {{ (client.bytes_received|default(0) / 1024 / 1024)|number_format(2) }} MB
            </div>
          </td>
          <td class="px-6 py-4 text-sm">
            {% if client.traffic_limit %}
              {% set total_traffic = (client.bytes_sent|default(0) + client.bytes_received|default(0)) %}
              {% set limit_gb = (client.traffic_limit / 1073741824)|number_format(2) %}
              {% set used_gb = (total_traffic / 1073741824)|number_format(2) %}
              {% set percentage = ((total_traffic / client.traffic_limit) * 100)|round %}
              
              {% if percentage >= 100 %}
                <span class="px-2 py-1 bg-red-100 text-red-800 rounded text-xs">
                  <i class="fas fa-exclamation-circle"></i> {{ t('clients.overlimit') }}
                </span>
              {% elseif percentage >= 80 %}
                <span class="px-2 py-1 bg-yellow-100 text-yellow-800 rounded text-xs">
                  {{ used_gb }} / {{ limit_gb }} GB ({{ percentage }}%)
                </span>
              {% else %}
                <span class="text-gray-600">{{ used_gb }} / {{ limit_gb }} GB</span>
              {% endif %}
            {% else %}
              <span class="text-gray-400">{{ t('clients.unlimited') }}</span>
            {% endif %}
          </td>
          <td class="px-6 py-4 text-sm">
            {% if client.last_handshake %}
              <span class="text-gray-600">{{ client.last_handshake }}</span>
            {% else %}
              <span class="text-gray-400">{{ t('clients.never') }}</span>
            {% endif %}
          </td>
          <td class="px-6 py-4">
            <a href="/clients/{{ client.id }}" class="text-purple-600 hover:text-purple-800 mr-2">{{ t('servers.view') }}</a>
            {% if client.status == 'active' %}
              <form method="POST" action="/clients/{{ client.id }}/revoke" style="display:inline;">
                <button type="submit" class="text-orange-600 hover:text-orange-800 mr-2" onclick="return confirm('{{ t('clients.revoke_confirm') }}')">{{ t('clients.revoke') }}</button>
              </form>
            {% else %}
              <form method="POST" action="/clients/{{ client.id }}/restore" style="display:inline;">
                <button type="submit" class="text-green-600 hover:text-green-800 mr-2">{{ t('clients.restore') }}</button>
              </form>
            {% endif %}
            <form method="POST" action="/clients/{{ client.id }}/delete" style="display:inline;">
              <button type="submit" class="text-red-600 hover:text-red-800" onclick="return confirm('{{ t('clients.delete_confirm') }}')">{{ t('clients.delete') }}</button>
            </form>
          </td>
        </tr>
        {% endfor %}
      </tbody>
    </table>
    {% else %}
    <div class="p-12 text-center text-gray-500">{{ t('clients.no_clients') }}</div>
    {% endif %}
  </div>
</div>

<script>
function toggleExpirationInput() {
  const select = document.getElementById('expirationSelect');
  const input = document.getElementById('expirationSeconds');
  if (select.value === 'custom') {
    input.style.display = 'block';
    input.required = true;
    input.focus();
  } else {
    input.style.display = 'none';
    input.required = false;
    input.value = '';
  }
}

function toggleTrafficInput() {
  const select = document.getElementById('trafficSelect');
  const input = document.getElementById('trafficMegabytes');
  if (select.value === 'custom') {
    input.style.display = 'block';
    input.required = true;
    input.focus();
  } else {
    input.style.display = 'none';
    input.required = false;
    input.value = '';
  }
}

document.addEventListener('DOMContentLoaded', function() {
  const form = document.getElementById('createClientForm');
  const clientNameInput = document.getElementById('clientName');
  
  // Auto-sanitize client name on input
  if (clientNameInput) {
    clientNameInput.addEventListener('input', function(e) {
      // Replace spaces and special characters with underscore
      let value = e.target.value;
      let sanitized = value.replace(/[^a-zA-Z0-9_-]/g, '_');
      if (value !== sanitized) {
        e.target.value = sanitized;
      }
    });
  }
  
  if (form) {
    form.addEventListener('submit', function(e) {
      const btn = document.getElementById('createClientBtn');
      const text = document.getElementById('createClientText');
      const spinner = document.getElementById('createClientSpinner');
      
      // Show spinner and disable button
      btn.disabled = true;
      text.style.display = 'none';
      spinner.style.display = 'inline-block';
      
      // Form will submit normally
    });
  }
});

async function syncAllStats(serverId) {
  try {
    const response = await fetch(`/servers/${serverId}/sync-stats`, {
      method: 'POST'
    });
    
    const data = await response.json();
    
    if (data.success) {
      location.reload();
    } else {
      alert('Failed to sync stats: ' + (data.error || 'Unknown error'));
    }
  } catch (error) {
    alert('Error: ' + error.message);
  }
}

// Load backups on page load
document.addEventListener('DOMContentLoaded', function() {
  loadBackups({{ server.id }});
});

async function loadBackups(serverId) {
  try {
    const response = await fetch(`/api/servers/${serverId}/backups`, {
      credentials: 'same-origin'
    });
    
    if (response.status === 401) {
      document.getElementById('backupsList').innerHTML = '<div class="text-center text-red-500 py-4">{{ t("message.error") }}: {{ t("backups.login_required") }}</div>';
      return;
    }
    
    const data = await response.json();
    
    if (data.success && data.backups.length > 0) {
      let html = '<div class="space-y-2">';
      data.backups.forEach(backup => {
        const size = (backup.backup_size / 1024 / 1024).toFixed(2);
        const statusClass = backup.status === 'completed' ? 'bg-green-100 text-green-800' : 'bg-red-100 text-red-800';
        
        html += `
          <div class="flex items-center justify-between p-3 border rounded">
            <div class="flex-1">
              <div class="font-medium">${backup.backup_name}</div>
              <div class="text-sm text-gray-600">
                ${backup.clients_count} {{ t('clients.title') }} • ${size} MB • ${backup.created_at}
              </div>
            </div>
            <div class="flex gap-2">
              <span class="px-2 py-1 ${statusClass} rounded text-xs">${backup.status}</span>
              ${backup.status === 'completed' ? `
                <button onclick="restoreBackup(${serverId}, ${backup.id})" class="text-blue-600 hover:text-blue-800 px-3 py-1 border rounded text-sm">
                  <i class="fas fa-undo"></i> {{ t('backups.restore') }}
                </button>
              ` : ''}
              <button onclick="deleteBackup(${backup.id})" class="text-red-600 hover:text-red-800 px-3 py-1 border rounded text-sm">
                <i class="fas fa-trash"></i>
              </button>
            </div>
          </div>
        `;
      });
      html += '</div>';
      document.getElementById('backupsList').innerHTML = html;
    } else {
      document.getElementById('backupsList').innerHTML = '<div class="text-center text-gray-500 py-4">{{ t("backups.no_backups") }}</div>';
    }
  } catch (error) {
    document.getElementById('backupsList').innerHTML = `<div class="text-center text-red-500 py-4">Error: ${error.message}</div>`;
  }
}

async function createBackup(serverId) {
  if (!confirm('{{ t("backups.create_confirm") }}')) return;
  
  // Show loading state
  document.getElementById('backupsList').innerHTML = '<div class="text-center text-gray-500 py-4"><i class="fas fa-spinner fa-spin"></i> {{ t("form.processing") }}</div>';
  
  try {
    const response = await fetch(`/api/servers/${serverId}/backup`, {
      method: 'POST',
      credentials: 'same-origin'
    });
    
    const data = await response.json();
    
    if (data.success) {
      alert('{{ t("backups.created_success") }}');
      loadBackups(serverId);
    } else {
      alert('Error: ' + (data.error || 'Unknown error'));
      loadBackups(serverId);
    }
  } catch (error) {
    alert('Error: ' + error.message);
    loadBackups(serverId);
  }
}

async function restoreBackup(serverId, backupId) {
  if (!confirm('{{ t("backups.restore_confirm") }}')) return;
  
  try {
    const response = await fetch(`/api/servers/${serverId}/restore`, {
      method: 'POST',
      credentials: 'same-origin',
      headers: {
        'Content-Type': 'application/json'
      },
      body: JSON.stringify({ backup_id: backupId })
    });
    
    const data = await response.json();
    console.log('Restore response:', data);
    
    if (data.success !== false) {
      let message = `{{ t("backups.restored_success") }}: ${data.restored} {{ t("clients.title") }}`;
      
      if (data.failed > 0) {
        message += `\n\nПропущено: ${data.failed}`;
        if (data.errors && data.errors.length > 0) {
          message += '\n\nПричины:\n' + data.errors.slice(0, 5).join('\n');
          if (data.errors.length > 5) {
            message += `\n... и ещё ${data.errors.length - 5}`;
          }
        }
      }
      
      alert(message);
      if (data.restored > 0) {
        location.reload();
      } else {
        loadBackups(serverId);
      }
    } else {
      let errorMsg = 'Error: ';
      if (data.error) {
        errorMsg += data.error;
      } else if (data.errors && data.errors.length > 0) {
        errorMsg += data.errors.join(', ');
      } else {
        errorMsg += 'Unknown error';
      }
      alert(errorMsg);
    }
  } catch (error) {
    console.error('Restore error:', error);
    alert('Error: ' + error.message);
  }
}

async function deleteBackup(backupId) {
  if (!confirm('{{ t("backups.delete_confirm") }}')) return;
  
  try {
    const response = await fetch(`/api/backups/${backupId}`, {
      method: 'DELETE',
      credentials: 'same-origin'
    });
    
    const data = await response.json();
    
    if (data.success) {
      alert('{{ t("backups.deleted_success") }}');
      loadBackups({{ server.id }});
    } else {
      alert('Error: ' + (data.error || 'Unknown error'));
    }
  } catch (error) {
    alert('Error: ' + error.message);
  }
}
</script>
{% endblock %}