// Shared timezone utility — used by setup wizard and settings modal
window.populateTimezoneSelect = function(selectEl, selectedTz) {
  const timezones = Intl.supportedValuesOf('timeZone');
  const detected = selectedTz || Intl.DateTimeFormat().resolvedOptions().timeZone || 'UTC';
  selectEl.innerHTML = '';
  for (const tz of timezones) {
    const opt = document.createElement('option');
    opt.value = tz;
    opt.textContent = tz.replace(/_/g, ' ');
    if (tz === detected) opt.selected = true;
    selectEl.appendChild(opt);
  }
};

// Setup Wizard System - Server-side config storage
(function () {
  let currentConfigType = 'homelab';
  let serverConfig = null;

  // Check server for existing config on page load
  async function checkServerConfig() {
    try {
      const response = await fetch('/api/v1/config');
      if (response.ok) {
        serverConfig = await response.json();
        if (serverConfig && serverConfig.setupComplete) {
          // Config exists on server - don't show wizard
          document.getElementById('setup-wizard').style.display = 'none';
          return true;
        }
      }
    } catch (error) {
      console.warn('Could not fetch server config, checking localStorage fallback:', error.message);
    }

    // Fallback: check localStorage for backwards compatibility
    const localSetup = safeGet('dashcaddy-setup');
    if (localSetup) {
      document.getElementById('setup-wizard').style.display = 'none';
      return true;
    }

    // No config found - show wizard
    document.getElementById('setup-wizard').style.display = 'flex';
    return false;
  }

  // Initialize on page load
  checkServerConfig();

  // Populate timezone dropdown with auto-detection
  const setupTzSelect = document.getElementById('setup-timezone');
  if (setupTzSelect) window.populateTimezoneSelect(setupTzSelect);

  // Step navigation
  function showStep(stepId) {
    document.querySelectorAll('.setup-step').forEach(step => {
      step.style.display = 'none';
    });
    const targetStep = document.getElementById(stepId);
    if (targetStep) {
      targetStep.style.display = 'block';
    }
  }

  // Show summary
  function showSummary() {
    const summaryContent = document.getElementById('setup-summary-content');
    if (!summaryContent) return;

    let html = '<div style="display: grid; gap: 20px;">';

    if (currentConfigType === 'homelab') {
      const tld = document.getElementById('setup-tld')?.value?.trim() || '.home';
      const caName = document.getElementById('setup-ca-name')?.value?.trim() || '';
      const dnsIP = document.getElementById('setup-dns-ip')?.value?.trim() || '';
      const dnsPort = document.getElementById('setup-dns-port')?.value?.trim() || DC.DEFAULTS.DNS_PORT;

      html += `
        <div>
          <h3 style="margin: 0 0 12px; color: var(--accent);">Home Lab Configuration</h3>
          <div style="display: grid; gap: 12px; font-size: 0.95rem;">
            <div><strong>TLD:</strong> ${tld}</div>
            <div><strong>Certificate Authority:</strong> ${caName}</div>
            <div><strong>DNS Server:</strong> ${dnsIP}:${dnsPort}</div>
            <div><strong>Example URLs:</strong> https://uptime${tld}, https://nextcloud${tld}</div>
          </div>
        </div>
      `;
    } else if (currentConfigType === 'simple') {
      const ip = document.getElementById('setup-simple-ip')?.value?.trim() || 'localhost';

      html += `
        <div>
          <h3 style="margin: 0 0 12px; color: var(--accent);">Simple Setup</h3>
          <div style="display: grid; gap: 12px; font-size: 0.95rem;">
            <div><strong>Access Method:</strong> IP:Port only</div>
            <div><strong>Default IP:</strong> ${ip}</div>
            <div><strong>SSL:</strong> None (HTTP only)</div>
            <div><strong>Example URLs:</strong> http://${ip}:8080, http://${ip}:3000</div>
          </div>
        </div>
      `;
    } else if (currentConfigType === 'public') {
      const domain = document.getElementById('setup-public-domain')?.value?.trim() || '';
      const email = document.getElementById('setup-public-email')?.value?.trim() || '';

      html += `
        <div>
          <h3 style="margin: 0 0 12px; color: var(--accent);">Public Server</h3>
          <div style="display: grid; gap: 12px; font-size: 0.95rem;">
            <div><strong>Domain:</strong> ${domain}</div>
            <div><strong>SSL:</strong> Let's Encrypt</div>
            <div><strong>Email:</strong> ${email}</div>
            <div><strong>Example URLs:</strong> https://app.${domain}, https://cloud.${domain}</div>
          </div>
        </div>
      `;
    }

    // Timezone (universal across all config types)
    const tz = document.getElementById('setup-timezone')?.value || Intl.DateTimeFormat().resolvedOptions().timeZone || 'UTC';
    html += `
      <div style="margin-top: 8px; padding-top: 12px; border-top: 1px solid var(--border);">
        <div style="font-size: 0.95rem;"><strong>Timezone:</strong> ${tz.replace(/_/g, ' ')}</div>
      </div>
    `;

    html += '</div>';
    summaryContent.innerHTML = html;
    showStep('setup-step-summary');
  }

  // Save config to server
  async function saveConfigToServer(config) {
    try {
      const response = await secureFetch('/api/v1/config', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(config)
      });

      if (response.ok) {
        await response.json();
        return true;
      } else {
        console.error('Failed to save config to server:', response.status);
        return false;
      }
    } catch (error) {
      console.error('Error saving config to server:', error);
      return false;
    }
  }

  // Finish setup handler
  async function finishSetup() {
    const config = {
      setupComplete: true,
      configurationType: currentConfigType,
      timestamp: new Date().toISOString(),
      timezone: document.getElementById('setup-timezone')?.value || Intl.DateTimeFormat().resolvedOptions().timeZone || 'UTC'
    };

    if (currentConfigType === 'homelab') {
      config.tld = document.getElementById('setup-tld')?.value?.trim() || '.home';
      config.caName = document.getElementById('setup-ca-name')?.value?.trim() || '';
      config.dns = {
        provider: 'technitium',
        ip: document.getElementById('setup-dns-ip')?.value?.trim() || '',
        port: document.getElementById('setup-dns-port')?.value?.trim() || DC.DEFAULTS.DNS_PORT,
        token: document.getElementById('setup-dns-token')?.value?.trim() || ''
      };
      config.defaults = {
        dnsType: 'private',
        sslType: 'internal',
        targetIP: 'localhost'
      };
    } else if (currentConfigType === 'simple') {
      config.defaultIP = document.getElementById('setup-simple-ip')?.value?.trim() || 'localhost';
      config.defaults = {
        dnsType: 'none',
        sslType: 'none',
        targetIP: config.defaultIP
      };
    } else if (currentConfigType === 'public') {
      config.domain = document.getElementById('setup-public-domain')?.value?.trim() || '';
      config.email = document.getElementById('setup-public-email')?.value?.trim() || '';
      config.defaults = {
        dnsType: 'public',
        sslType: 'letsencrypt',
        targetIP: 'localhost'
      };
    }

    // Save to server (primary) and localStorage (fallback)
    const savedToServer = await saveConfigToServer(config);
    safeSet('dashcaddy-config', JSON.stringify(config));
    safeSet('dashcaddy-setup', 'completed');

    // Hide wizard
    document.getElementById('setup-wizard').style.display = 'none';

    // Show success notification
    const configName = currentConfigType === 'homelab' ? 'Professional Home Lab' :
                      currentConfigType === 'simple' ? 'Simple Setup' : 'Public Server';
    const saveLocation = savedToServer ? 'server (shared across all devices)' : 'locally (this browser only)';

    showNotification(`Setup Complete! Configured for: ${configName}. Settings saved to: ${saveLocation}`, 'success', 5000);

    // Reload page to apply configuration
    setTimeout(() => location.reload(), 500);
  }

  // ===== Event Handlers using direct onclick for reliability =====

  // Step 1: Continue button
  const step1Next = document.getElementById('setup-step-1-next');
  if (step1Next) {
    step1Next.onclick = function(e) {
      e.preventDefault();
      const selected = document.querySelector('input[name="config-type"]:checked');
      if (selected) {
        currentConfigType = selected.value;
      }
      if (currentConfigType === 'homelab') {
        showStep('setup-step-homelab');
      } else if (currentConfigType === 'simple') {
        showStep('setup-step-simple');
      } else if (currentConfigType === 'public') {
        showStep('setup-step-public');
      } else {
        showStep('setup-step-homelab');
      }
    };
  }

  // Skip setup button
  const skipBtn = document.getElementById('setup-skip');
  if (skipBtn) {
    skipBtn.onclick = async function(e) {
      e.preventDefault();
      if (confirm('Skip setup? You can run it later from Settings.')) {
        // Save skip status to server
        await saveConfigToServer({ setupComplete: true, skipped: true, timestamp: new Date().toISOString() });
        safeSet('dashcaddy-setup', 'skipped');
        document.getElementById('setup-wizard').style.display = 'none';
      }
    };
  }

  // Home Lab: TLD Preview
  const tldInput = document.getElementById('setup-tld');
  if (tldInput) {
    tldInput.oninput = function(e) {
      const tld = e.target.value || '.home';
      const preview1 = document.getElementById('tld-preview');
      const preview2 = document.getElementById('tld-preview-2');
      if (preview1) preview1.textContent = tld;
      if (preview2) preview2.textContent = tld;
    };
  }

  // Home Lab navigation
  const homelabBack = document.getElementById('setup-homelab-back');
  if (homelabBack) {
    homelabBack.onclick = function(e) {
      e.preventDefault();
      showStep('setup-step-1');
    };
  }

  const homelabNext = document.getElementById('setup-homelab-next');
  if (homelabNext) {
    homelabNext.onclick = function(e) {
      e.preventDefault();
      const tld = document.getElementById('setup-tld')?.value?.trim() || '';
      const caName = document.getElementById('setup-ca-name')?.value?.trim() || '';
      const dnsIP = document.getElementById('setup-dns-ip')?.value?.trim() || '';

      if (!tld || !tld.startsWith('.')) {
        showNotification('Please enter a valid TLD starting with a dot (e.g., .home)', 'warning');
        return;
      }
      if (!caName) {
        showNotification('Please enter a Certificate Authority name', 'warning');
        return;
      }
      if (!dnsIP) {
        showNotification('Please enter your DNS server IP address', 'warning');
        return;
      }
      showSummary();
    };
  }

  // Simple navigation
  const simpleBack = document.getElementById('setup-simple-back');
  if (simpleBack) {
    simpleBack.onclick = function(e) {
      e.preventDefault();
      showStep('setup-step-1');
    };
  }

  const simpleNext = document.getElementById('setup-simple-next');
  if (simpleNext) {
    simpleNext.onclick = function(e) {
      e.preventDefault();
      showSummary();
    };
  }

  // Public navigation
  const publicBack = document.getElementById('setup-public-back');
  if (publicBack) {
    publicBack.onclick = function(e) {
      e.preventDefault();
      showStep('setup-step-1');
    };
  }

  const publicNext = document.getElementById('setup-public-next');
  if (publicNext) {
    publicNext.onclick = function(e) {
      e.preventDefault();
      const domain = document.getElementById('setup-public-domain')?.value?.trim() || '';
      const email = document.getElementById('setup-public-email')?.value?.trim() || '';

      if (!domain) {
        showNotification('Please enter your domain name', 'warning');
        return;
      }
      if (!email || !email.includes('@')) {
        showNotification('Please enter a valid email address', 'warning');
        return;
      }
      showSummary();
    };
  }

  // Summary navigation
  const summaryBack = document.getElementById('setup-summary-back');
  if (summaryBack) {
    summaryBack.onclick = function(e) {
      e.preventDefault();
      if (currentConfigType === 'homelab') {
        showStep('setup-step-homelab');
      } else if (currentConfigType === 'simple') {
        showStep('setup-step-simple');
      } else if (currentConfigType === 'public') {
        showStep('setup-step-public');
      }
    };
  }

  // Finish setup button
  const finishBtn = document.getElementById('setup-finish');
  if (finishBtn) {
    finishBtn.onclick = function(e) {
      e.preventDefault();
      finishSetup();
    };
  }

  // Expose function to get global config (from server or localStorage)
  window.getGlobalConfig = async function() {
    // Try server first
    try {
      const response = await fetch('/api/v1/config');
      if (response.ok) {
        const config = await response.json();
        if (config && config.setupComplete) {
          return config;
        }
      }
    } catch (e) {
      console.warn('Could not fetch config from server');
    }

    // Fallback to localStorage
    const configStr = safeGet('dashcaddy-config');
    if (configStr) {
      return JSON.parse(configStr);
    }

    // Return default config if not set
    return {
      setupComplete: false,
      configurationType: 'homelab',
      tld: '.home',
      caName: '',
      defaults: {
        dnsType: 'private',
        sslType: 'internal',
        targetIP: 'localhost'
      }
    };
  };

  // Expose reset function for settings
  window.resetSetupWizard = async function() {
    if (confirm('Reset DashCaddy configuration? This will show the setup wizard again.')) {
      try {
        await secureFetch('/api/v1/config', { method: 'DELETE' });
      } catch (e) {
        console.warn('Could not delete server config');
      }
      safeRemove('dashcaddy-setup');
      safeRemove('dashcaddy-config');
      location.reload();
    }
  };
})();