/**
 * SmartVue Widget Loader with Client Config Support
 * This loader fetches the current version and loads the appropriate files
 * 
 * Usage: 
 *   <script src="proxy.php?url=https://your-domain.pages.dev/loader.js" data-client="conmed"></script>
 *   OR
 *   <script src="proxy.php?url=https://your-domain.pages.dev/loader.js?client=conmed"></script>
 */
(function() {
  'use strict';
  
  // Get the current script tag
  const currentScript = document.currentScript;
  
  // Get the base URL from the loader script
  const loaderSrc = currentScript && currentScript.src;
  const baseUrl = loaderSrc ? loaderSrc.substring(0, loaderSrc.lastIndexOf('/')) : '';
  
  // Determine client name from data attribute or URL parameter
  let clientName = null;
  
  // Check data attribute first
  if (currentScript && currentScript.dataset.client) {
    clientName = currentScript.dataset.client;
  }
  
  // Check URL parameter as fallback
  if (!clientName && loaderSrc) {
    try {
      const url = new URL(loaderSrc);
      clientName = url.searchParams.get('client');
    } catch (e) {
      // Invalid URL, skip
    }
  }
  
  // Helper: copy data attributes from loader script to a new script tag
  function copyDataAttributes(targetScript, excludeClient) {
    if (currentScript) {
      Array.from(currentScript.attributes).forEach(function(attr) {
        if (attr.name.startsWith('data-') && (!excludeClient || attr.name !== 'data-client')) {
          targetScript.setAttribute(attr.name, attr.value);
        }
      });
    }
  }

  // Check the host page URL for a ?v= version override (for staging/testing)
  var versionOverride = null;
  try {
    versionOverride = new URL(window.location.href).searchParams.get('v');
  } catch (e) {
    // Ignore — older browsers without URL support
  }

  if (versionOverride) {
    // Load a specific staged version directly, skip version.json entirely
    console.log('SmartVue: Loading staged version ' + versionOverride);
    var stagedScript = document.createElement('script');
    stagedScript.src = baseUrl + '/smartvue.' + versionOverride + '.js';
    stagedScript.async = true;
    copyDataAttributes(stagedScript, false);
    document.head.appendChild(stagedScript);
  } else {
    // Normal flow: fetch version info and load the appropriate files
    fetch(baseUrl + '/version.json?_=' + Date.now())
      .then(function(response) { return response.json(); })
      .then(function(versionData) {
        if (clientName && versionData.clients && versionData.clients[clientName]) {
          // Load client-specific config (which will load the widget)
          console.log('SmartVue: Loading client config for ' + clientName);
          var clientConfig = versionData.clients[clientName];
          var script = document.createElement('script');
          script.src = baseUrl + '/' + clientConfig.path;
          script.async = true;
          copyDataAttributes(script, true);
          document.head.appendChild(script);
        } else {
          // Load main widget directly (no client config)
          console.log('SmartVue: Loading main widget');
          var script = document.createElement('script');
          script.src = baseUrl + '/' + versionData.widget.filename;
          script.async = true;
          copyDataAttributes(script, false);
          document.head.appendChild(script);
        }
      })
      .catch(function(error) {
        console.error('SmartVue: Failed to load version info', error);

        // Fallback to main file if version fetch fails
        var script = document.createElement('script');
        script.src = baseUrl + '/smartvue.js';
        script.async = true;
        copyDataAttributes(script, false);
        document.head.appendChild(script);
      });
  }
})();