// Application Name Validation
function validateAppName() {
  const nameField = document.getElementById('app-name');
  const serverField = document.getElementById('server-id');
  const feedbackElement = document.getElementById('name-feedback');
  const submitButton = document.querySelector('button[type="submit"]');

  if (!nameField || !serverField) return;

  const name = nameField.value.trim();
  const serverId = serverField.value;
  const appId = document.getElementById('app-id')?.value;

  if (!name || !serverId) {
    clearFeedback(feedbackElement);
    return;
  }

  // Debounce to avoid too many requests
  clearTimeout(nameField.timer);
  nameField.timer = setTimeout(() => {
    fetch(`/api/validate/app-name?name=${encodeURIComponent(name)}&server_id=${serverId}${appId ? '&app_id=' + appId : ''}`)
      .then(response => response.json())
      .then(data => {
        if (!data.valid) {
          showError(feedbackElement, data.message);
          if (data.edit_url) {
            feedbackElement.innerHTML += ` <a href="${data.edit_url}" class="alert-link">Edit this app instead?</a>`;
          }
          submitButton.disabled = true;
        } else if (data.warning) {
          showWarning(feedbackElement, data.warning);
          if (data.similar_apps && data.similar_apps.length > 0) {
            feedbackElement.innerHTML += '<ul class="mb-0 mt-1">';
            data.similar_apps.forEach(app => {
              feedbackElement.innerHTML += `<li><a href="/dashboard/app/${app.id}/edit" class="alert-link">${app.name}</a></li>`;
            });
            feedbackElement.innerHTML += '</ul>';
          }
          submitButton.disabled = false;
        } else {
          showSuccess(feedbackElement, "App name is available");
          submitButton.disabled = false;
        }
      })
      .catch(error => {
        console.error('Validation error:', error);
        clearFeedback(feedbackElement);
      });
  }, 300);
}

// Port Validation
function validatePort(portField, protocolField) {
  const serverField = document.getElementById('server-id');
  // Create feedback element if it doesn't exist
  if (!portField.nextElementSibling || !portField.nextElementSibling.classList.contains('feedback')) {
    const feedback = document.createElement('div');
    feedback.className = 'feedback';
    portField.parentNode.insertBefore(feedback, portField.nextSibling);
  }

  const feedbackElement = portField.nextElementSibling;
  const submitButton = document.querySelector('button[type="submit"]');

  if (!portField || !serverField || !protocolField) return;

  const port = portField.value.trim();
  const protocol = protocolField.value;
  const serverId = serverField.value;
  const appId = document.getElementById('app-id')?.value;

  if (!port || !serverId) {
    clearFeedback(feedbackElement);
    portField.classList.remove('is-invalid');
    return;
  }

  // Check for duplicate ports within the form first
  const allPortFields = document.querySelectorAll('input[name="port_numbers[]"]');
  const allProtocolFields = document.querySelectorAll('select[name="protocols[]"]');
  let duplicateFound = false;

  allPortFields.forEach((field, index) => {
    if (field !== portField &&
      field.value === port &&
      allProtocolFields[index].value === protocol) {
      duplicateFound = true;
    }
  });

  if (duplicateFound) {
    portField.classList.add('is-invalid');
    showError(feedbackElement, `Duplicate port ${port}/${protocol} in your form`);
    return;
  }

  // Debounce to avoid too many requests
  clearTimeout(portField.timer);
  portField.timer = setTimeout(() => {
    fetch(`/api/validate/app-port?port_number=${encodeURIComponent(port)}&protocol=${protocol}&server_id=${serverId}${appId ? '&app_id=' + appId : ''}`)
      .then(response => response.json())
      .then(data => {
        if (!data.valid) {
          portField.classList.add('is-invalid');
          showError(feedbackElement, data.message);
          if (data.edit_url) {
            feedbackElement.innerHTML += ` <a href="${data.edit_url}" class="alert-link">Edit conflicting app</a>`;
          }
        } else {
          portField.classList.remove('is-invalid');
          portField.classList.add('is-valid');
          showSuccess(feedbackElement, "Port available");
        }
      })
      .catch(error => {
        console.error('Validation error:', error);
        clearFeedback(feedbackElement);
        portField.classList.remove('is-invalid');
        portField.classList.remove('is-valid');
      });
  }, 300);
}

// Helper functions for feedback display
function showError(element, message) {
  if (!element) return;
  element.className = 'invalid-feedback d-block';
  element.textContent = message;
}

function showWarning(element, message) {
  if (!element) return;
  element.className = 'text-warning d-block';
  element.textContent = message;
}

function showSuccess(element, message) {
  if (!element) return;
  element.className = 'valid-feedback d-block';
  element.textContent = message;
}

function clearFeedback(element) {
  if (!element) return;
  element.className = '';
  element.textContent = '';
}

// Set up event listeners when the document is loaded
document.addEventListener('DOMContentLoaded', function () {
  const nameField = document.getElementById('app-name');
  const serverField = document.getElementById('server-id');

  if (nameField) {
    nameField.addEventListener('input', validateAppName);

    if (serverField) {
      serverField.addEventListener('change', validateAppName);
    }
  }

  // Set up validation for existing port fields
  setupPortValidation();

  // Make sure new port rows get validation too
  const addPortButton = document.getElementById('add-port-btn');
  if (addPortButton) {
    addPortButton.addEventListener('click', function () {
      // Wait a moment for the new row to be added
      setTimeout(setupPortValidation, 100);
    });
  }
});

function setupPortValidation() {
  const portFields = document.querySelectorAll('input[name="port_numbers[]"]');
  const protocolFields = document.querySelectorAll('select[name="protocols[]"]');

  portFields.forEach((field, index) => {
    if (!field.hasValidationSetup) {
      const protocolField = protocolFields[index];

      field.addEventListener('input', function () {
        validatePort(field, protocolField);
      });

      if (protocolField) {
        protocolField.addEventListener('change', function () {
          validatePort(field, protocolField);
        });
      }

      // Add a div for feedback if it doesn't exist
      if (!field.nextElementSibling || !field.nextElementSibling.classList.contains('feedback')) {
        const feedback = document.createElement('div');
        feedback.className = 'feedback';
        field.parentNode.insertBefore(feedback, field.nextSibling);
      }

      field.hasValidationSetup = true;
    }
  });
}