/**
 * Cookie utility functions for Growi affiliate tracking
 * @version 1.0.0
 */

// Generate a UUID for visitor tracking
function generateUUID() {
  return "10000000-1000-4000-8000-100000000000".replace(
    /[018]/g,
    (c) =>
      (
        c ^
        (crypto.getRandomValues(new Uint8Array(1))[0] & (15 >> (c / 4)))
      ).toString(16)
  );
}

// Get URL parameter value
function getQueryParam(param) {
  const urlParams = new URLSearchParams(window.location.search);
  const value = urlParams.get(param);
  return value === "" ? null : value;
}

// Get cookie value
function getCookie(name) {
  const value = `; ${document.cookie}`;
  const parts = value.split(`; ${name}=`);
  if (parts.length === 2) return parts.pop().split(';').shift();
}

// Set cookie with expiration
function setCookie(name, value, days = 365) {
  const expires = new Date();
  expires.setTime(expires.getTime() + days * 24 * 60 * 60 * 1000);
  document.cookie = `${name}=${value};expires=${expires.toUTCString()};path=/;SameSite=Lax`;
}

// Check and manage affiliate cookies
function manageAffiliateCookies() {
  // Get stored affiliate ID
  const storedAffiliateId = getCookie("growi_affiliate_id");
  
  // Check if affiliate parameter is in URL
  const incomingAffiliateId = getQueryParam("a") || getQueryParam("snowball");
  
  // Set affiliate ID cookie if needed
  if (incomingAffiliateId && (!storedAffiliateId || incomingAffiliateId !== storedAffiliateId)) {
    setCookie("growi_affiliate_id", incomingAffiliateId);
  }
  
  // Create visitor UID if needed
  const storedVisitorUid = getCookie("growi_visitor_uid");
  if (!storedVisitorUid) {
    setCookie("growi_visitor_uid", generateUUID());
  }
  
  return {
    affiliateId: getCookie("growi_affiliate_id"),
    visitorUid: getCookie("growi_visitor_uid")
  };
}

// Update cart with affiliate information
function updateCartAttributes() {
  const affiliateId = getCookie("growi_affiliate_id");
  const visitorUid = getCookie("growi_visitor_uid");
  
  if (affiliateId && visitorUid) {
    fetch('/cart/update.js', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({
        attributes: {
          __growi_affiliate_id: affiliateId,
          __growi_visitor_uid: visitorUid,
        },
      }),
    })
      .then((res) => res.json())
      .then((data) => {
        console.log('✅ Cart attributes updated with affiliate & visitor ID', data);
      })
      .catch((err) => {
        console.error('❌ Failed to update cart attributes', err);
      });
  }
}

console.log("cookie-utils.js, v.5.13.25");

// Make functions globally available
window.growiCookieUtils = {
  getCookie,
  setCookie,
  getQueryParam,
  generateUUID,
  manageAffiliateCookies,
  updateCartAttributes
};