// Shared browser helpers for web UI escaping and formatting.

(function () {
  var urlValidationMessage = 'Please enter a URL.';

  function isUrlInput(input) {
    return input && input.matches && input.matches('input[type="url"]');
  }

  function isValidHttpUrl(input) {
    input.setCustomValidity('');
    var value = String(input.value || '').trim();
    var hasValidNativeUrl = input.validity.valid;
    var hasExplicitHttpScheme = /^https?:\/\/[^\s]+$/i.test(value);
    var isValid = hasValidNativeUrl && hasExplicitHttpScheme;
    if (!isValid) {
      input.setCustomValidity(urlValidationMessage);
    }
    return isValid;
  }

  function getUrlFeedback(input) {
    if (input._urlFeedback && input._urlFeedback.parentNode) {
      return input._urlFeedback;
    }

    var feedbackId = input.id ? input.id + '-url-feedback' : '';
    var feedback = feedbackId ? document.getElementById(feedbackId) : null;
    if (feedback) {
      var inputGroup = input.closest ? input.closest('.input-group') : null;
      var feedbackAnchor = inputGroup || input;
      feedbackAnchor.parentNode.insertBefore(feedback, feedbackAnchor.nextSibling);
      input._urlFeedback = feedback;
      return feedback;
    }

    feedback = document.createElement('div');
    if (feedbackId) {
      feedback.id = feedbackId;
    }
    feedback.className = 'invalid-feedback';
    feedback.setAttribute('role', 'alert');
    feedback.textContent = urlValidationMessage;

    var inputGroup = input.closest ? input.closest('.input-group') : null;
    var feedbackAnchor = inputGroup || input;
    feedbackAnchor.parentNode.insertBefore(feedback, feedbackAnchor.nextSibling);
    if (input.id) {
      input.setAttribute('aria-describedby', feedback.id);
    }
    input._urlFeedback = feedback;
    return feedback;
  }

  function updateUrlValidation(input, showFeedback) {
    if (!isUrlInput(input)) {
      return true;
    }

    var isValid = isValidHttpUrl(input);
    if (!isValid && showFeedback) {
      var feedback = getUrlFeedback(input);
      feedback.hidden = false;
      feedback.classList.add('d-block');
      input.classList.add('is-invalid');
    } else if (isValid) {
      if (input.id) {
        document.querySelectorAll('[id="' + input.id + '-url-feedback"]').forEach(function (feedback) {
          feedback.hidden = true;
          feedback.classList.remove('d-block');
        });
      } else if (input._urlFeedback) {
        input._urlFeedback.hidden = true;
        input._urlFeedback.classList.remove('d-block');
      }
      input.classList.remove('is-invalid');
    }

    return isValid;
  }

  function initializeUrlValidation() {
    if (typeof document === 'undefined') {
      return;
    }

    document.addEventListener('input', function (event) {
      if (isUrlInput(event.target)) {
        updateUrlValidation(event.target, true);
      }
    });
    document.addEventListener('invalid', function (event) {
      if (isUrlInput(event.target)) {
        event.preventDefault();
        updateUrlValidation(event.target, true);
      }
    }, true);
  }

  function escapeHtml(value) {
    return String(value ?? '')
      .replace(/&/g, '&')
      .replace(/</g, '&lt;')
      .replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;')
      .replace(/'/g, '&#39;');
  }

  function formatDashboardDate(value, useTwentyFourHour) {
    if (!value) {
      return '';
    }

    var date = new Date(value);
    if (Number.isNaN(date.getTime())) {
      return '';
    }

    var formatOptions = {
      month: 'short',
      day: '2-digit',
      year: 'numeric',
      hour: 'numeric',
      minute: '2-digit',
      second: '2-digit'
    };

    if (useTwentyFourHour) {
      formatOptions.hour12 = false;
    }

    return new Intl.DateTimeFormat('en-US', formatOptions).format(date);
  }

  function getClientRowKey(client) {
    return String(client && client.id ? client.id : client && client.clientId ? client.clientId : client && client.screen_slug ? client.screen_slug : client && client.deviceId ? client.deviceId : '').trim();
  }

  function getClientDisplayName(client) {
    if (client && client.client_name) {
      return String(client.client_name).trim();
    }

    var clientId = String(client && client.clientId ? client.clientId : '').trim();
    if (clientId) {
      return clientId;
    }

    return '';
  }

  function setButtonVariant(button, classesToRemove, classToAdd) {
    if (!button) {
      return;
    }

    if (button.classList) {
      classesToRemove.forEach(function (className) {
        button.classList.remove(className);
      });
      if (classToAdd) {
        button.classList.add(classToAdd);
      }
      return;
    }

    var className = String(button.className || '');
    classesToRemove.forEach(function (removeClass) {
      className = className.replace(new RegExp('(^|\\s)' + removeClass + '(?=\\s|$)', 'g'), ' ');
    });
    if (classToAdd) {
      className += ' ' + classToAdd;
    }
    button.className = className.replace(/\s+/g, ' ').trim();
  }

  function normalizeDisplayIp(value) {
    var ip = String(value || '').trim();
    if (!ip) {
      return '';
    }

    if (ip.toLowerCase().indexOf('::ffff:') === 0) {
      return ip.slice(7).trim();
    }

    return ip;
  }

  initializeUrlValidation();

  async function blobToText(blob) {
    if (!blob) {
      return '';
    }

    if (typeof blob.text === 'function') {
      return blob.text();
    }

    if (typeof FileReader === 'function') {
      return await new Promise(function (resolve, reject) {
        var reader = new FileReader();
        reader.onload = function () {
          resolve(String(reader.result || ''));
        };
        reader.onerror = function () {
          reject(reader.error || new Error('Failed to read blob.'));
        };
        reader.readAsText(blob);
      });
    }

    return '';
  }

  window.blobToText = blobToText;
  window.escapeHtml = escapeHtml;
  window.pendingByRegionId = window.pendingByRegionId || Object.create(null);

  window.webUiHelpers = {
    escapeHtml: escapeHtml,
    formatDashboardDate: formatDashboardDate,
    getClientRowKey: getClientRowKey,
    getClientDisplayName: getClientDisplayName,
    setButtonVariant: setButtonVariant,
    normalizeDisplayIp: normalizeDisplayIp
  };
}());