export const ATTRIBUTION_COOKIE_NAME = 'qrmaster_first_touch';
export const ONBOARDING_CHECKLIST_DISMISS_KEY = 'qrmaster_onboarding_checklist_dismissed';
export const ONBOARDING_DOWNLOAD_COMPLETE_KEY = 'qrmaster_onboarding_download_complete';
export const ONBOARDING_DOWNLOAD_COMPLETE_EVENT = 'qrmaster:onboarding-download-complete';

export type LifecycleStage =
  | 'cold'
  | 'activated'
  | 'warm'
  | 'hot'
  | 'upgrade_candidate'
  | 'paid';

export type SignupSourceOption = {
  value: string;
  label: string;
};

export type OnboardingOption = {
  value: string;
  label: string;
  description?: string;
};

export type AttributionSnapshot = {
  signupSource?: string | null;
  signupMedium?: string | null;
  signupCampaign?: string | null;
  signupContent?: string | null;
  signupTerm?: string | null;
  signupReferrer?: string | null;
  signupLandingPath?: string | null;
  signupFirstSeenAt?: string | null;
};

const FREEMAIL_DOMAINS = new Set([
  'gmail.com',
  'yahoo.com',
  'hotmail.com',
  'outlook.com',
  'icloud.com',
  'gmx.de',
  'gmx.net',
  'web.de',
  'mail.com',
  'aol.com',
  'proton.me',
  'protonmail.com',
]);

export const SIGNUP_SOURCE_OPTIONS: SignupSourceOption[] = [
  { value: 'google_search', label: 'Google Search' },
  { value: 'instagram', label: 'Instagram' },
  { value: 'facebook', label: 'Facebook' },
  { value: 'tiktok', label: 'TikTok' },
  { value: 'linkedin', label: 'LinkedIn' },
  { value: 'youtube', label: 'YouTube' },
  { value: 'blog_article', label: 'Blog or article' },
  { value: 'friend_colleague', label: 'Friend or colleague' },
  { value: 'direct', label: 'Direct / I typed the URL' },
  { value: 'other', label: 'Other' },
];

export const PRIMARY_USE_CASE_OPTIONS: OnboardingOption[] = [
  { value: 'website_qr', label: 'Website QR Code' },
  { value: 'menu_pdf', label: 'Menu or PDF QR Code' },
  { value: 'contact_card', label: 'Contact Card QR Code' },
  { value: 'wifi_qr', label: 'WiFi QR Code' },
  { value: 'marketing_campaign', label: 'Marketing Campaign QR Code' },
  { value: 'barcode', label: 'Barcode' },
  { value: 'bulk_qr', label: 'Bulk QR Codes' },
  { value: 'something_else', label: 'Something else' },
];

export const PRIMARY_GOAL_OPTIONS: OnboardingOption[] = [
  { value: 'drive_website_traffic', label: 'Drive website traffic' },
  { value: 'track_printed_campaigns', label: 'Track printed campaigns' },
  { value: 'share_contact_details', label: 'Share contact details' },
  { value: 'replace_printed_menus', label: 'Replace printed menus' },
  { value: 'generate_leads', label: 'Generate leads' },
  { value: 'label_products', label: 'Label products' },
  { value: 'manage_multiple_qr_codes', label: 'Manage multiple QR codes' },
  { value: 'something_else', label: 'Something else' },
];

export const JOB_ROLE_OPTIONS: OnboardingOption[] = [
  { value: 'founder_owner', label: 'Founder / Owner' },
  { value: 'marketing_manager', label: 'Marketing Manager' },
  { value: 'operations', label: 'Operations' },
  { value: 'agency_freelancer', label: 'Agency / Freelancer' },
  { value: 'it_technical', label: 'IT / Technical' },
  { value: 'sales', label: 'Sales' },
  { value: 'designer', label: 'Designer' },
  { value: 'other', label: 'Other' },
];

export const TEAM_SIZE_OPTIONS: OnboardingOption[] = [
  { value: 'just_me', label: 'Just me' },
  { value: '2_5', label: '2–5' },
  { value: '6_20', label: '6–20' },
  { value: '21_100', label: '21–100' },
  { value: '100_plus', label: '100+' },
];

export function serializeAttributionCookie(snapshot: AttributionSnapshot): string {
  return JSON.stringify(snapshot);
}

export function parseAttributionCookie(value?: string | null): AttributionSnapshot | null {
  if (!value) {
    return null;
  }

  try {
    return JSON.parse(value) as AttributionSnapshot;
  } catch {
    return null;
  }
}

export function getEmailDomain(email?: string | null): string | null {
  if (!email || !email.includes('@')) {
    return null;
  }

  return email.split('@')[1]?.trim().toLowerCase() || null;
}

export function isFreemailDomain(domain?: string | null): boolean {
  return Boolean(domain && FREEMAIL_DOMAINS.has(domain.toLowerCase()));
}

export function getSourceLabel(value?: string | null): string {
  const option = SIGNUP_SOURCE_OPTIONS.find((item) => item.value === value);
  return option?.label || 'Unknown';
}

export function getUseCaseLabel(value?: string | null): string {
  const option = PRIMARY_USE_CASE_OPTIONS.find((item) => item.value === value);
  return option?.label || 'Unknown';
}

export function getGoalLabel(value?: string | null): string {
  const option = PRIMARY_GOAL_OPTIONS.find((item) => item.value === value);
  return option?.label || 'Unknown';
}

export function getRoleLabel(value?: string | null): string {
  const option = JOB_ROLE_OPTIONS.find((item) => item.value === value);
  return option?.label || 'Unknown';
}

export function getTeamSizeLabel(value?: string | null): string {
  const option = TEAM_SIZE_OPTIONS.find((item) => item.value === value);
  return option?.label || 'Unknown';
}

export function normalizeSource(input: {
  utmSource?: string | null;
  referrer?: string | null;
  landingPath?: string | null;
}): string {
  const utmSource = input.utmSource?.toLowerCase().trim();
  const referrer = input.referrer?.toLowerCase().trim();
  const landingPath = input.landingPath?.toLowerCase().trim();

  if (utmSource) {
    if (utmSource.includes('google')) return 'google_search';
    if (utmSource.includes('instagram')) return 'instagram';
    if (utmSource.includes('facebook') || utmSource.includes('meta')) return 'facebook';
    if (utmSource.includes('tiktok')) return 'tiktok';
    if (utmSource.includes('linkedin')) return 'linkedin';
    if (utmSource.includes('youtube')) return 'youtube';
    if (utmSource.includes('blog') || utmSource.includes('article') || utmSource.includes('seo')) return 'blog_article';
  }

  if (referrer) {
    if (referrer.includes('google.')) return 'google_search';
    if (referrer.includes('instagram.')) return 'instagram';
    if (referrer.includes('facebook.') || referrer.includes('fb.com')) return 'facebook';
    if (referrer.includes('tiktok.')) return 'tiktok';
    if (referrer.includes('linkedin.')) return 'linkedin';
    if (referrer.includes('youtube.')) return 'youtube';
    if (referrer.includes('medium.com') || referrer.includes('substack.com') || referrer.includes('/blog')) return 'blog_article';
  }

  if (landingPath && landingPath.startsWith('/blog')) {
    return 'blog_article';
  }

  return 'direct';
}

export function buildAttributionSnapshot(params: {
  utmSource?: string | null;
  utmMedium?: string | null;
  utmCampaign?: string | null;
  utmContent?: string | null;
  utmTerm?: string | null;
  referrer?: string | null;
  landingPath?: string | null;
  firstSeenAt?: Date | string | null;
}): AttributionSnapshot {
  const signupFirstSeenAt =
    params.firstSeenAt instanceof Date
      ? params.firstSeenAt.toISOString()
      : params.firstSeenAt || new Date().toISOString();

  return {
    signupSource: normalizeSource({
      utmSource: params.utmSource,
      referrer: params.referrer,
      landingPath: params.landingPath,
    }),
    signupMedium: params.utmMedium || null,
    signupCampaign: params.utmCampaign || null,
    signupContent: params.utmContent || null,
    signupTerm: params.utmTerm || null,
    signupReferrer: params.referrer || null,
    signupLandingPath: params.landingPath || null,
    signupFirstSeenAt,
  };
}

export function shouldResumeOnboarding(user: {
  onboardingStartedAt?: Date | null;
  onboardingCompletedAt?: Date | null;
} | null): boolean {
  if (!user) {
    return false;
  }

  return Boolean(user.onboardingStartedAt && !user.onboardingCompletedAt);
}

export function getLifecycleStageLabel(stage?: string | null): string {
  switch (stage) {
    case 'activated':
      return 'Activated';
    case 'warm':
      return 'Warm';
    case 'hot':
      return 'Hot';
    case 'upgrade_candidate':
      return 'Upgrade Candidate';
    case 'paid':
      return 'Paid';
    default:
      return 'Cold';
  }
}

export function getOnboardingHeadlineForUseCase(useCase?: string | null): string {
  switch (useCase) {
    case 'marketing_campaign':
      return 'Create your first campaign QR code';
    case 'menu_pdf':
      return 'Create your first menu QR code';
    case 'contact_card':
      return 'Create your first contact QR code';
    case 'barcode':
      return 'Create your first barcode';
    case 'bulk_qr':
      return 'Set up your first business-ready QR';
    default:
      return 'Create your first QR code';
  }
}

export function getCreatePresetForUseCase(useCase?: string | null): {
  contentType: string;
  dynamic: boolean;
  title: string;
  content: Record<string, string>;
} {
  switch (useCase) {
    case 'menu_pdf':
      return {
        contentType: 'PDF',
        dynamic: true,
        title: 'Restaurant menu',
        content: {},
      };
    case 'contact_card':
      return {
        contentType: 'VCARD',
        dynamic: true,
        title: 'Business contact card',
        content: {},
      };
    case 'barcode':
      return {
        contentType: 'BARCODE',
        dynamic: false,
        title: 'Product barcode',
        content: { format: 'CODE128' },
      };
    case 'bulk_qr':
      return {
        contentType: 'URL',
        dynamic: true,
        title: 'Bulk campaign starter',
        content: { url: '' },
      };
    case 'wifi_qr':
      return {
        contentType: 'TEXT',
        dynamic: false,
        title: 'WiFi access QR',
        content: { text: 'WIFI:T:WPA;S:MyNetwork;P:password;;' },
      };
    case 'website_qr':
      return {
        contentType: 'URL',
        dynamic: true,
        title: 'Website QR',
        content: { url: '' },
      };
    case 'marketing_campaign':
    default:
      return {
        contentType: 'URL',
        dynamic: true,
        title: 'Campaign landing page',
        content: { url: '' },
      };
  }
}

export function getChecklistItems(user: {
  signupSourceSelfReported?: string | null;
  primaryUseCase?: string | null;
  firstQrCreatedAt?: string | Date | null;
  firstDynamicQrAt?: string | Date | null;
  firstScanAt?: string | Date | null;
  activationAt?: string | Date | null;
}): Array<{ id: string; label: string; done: boolean }> {
  return [
    {
      id: 'source',
      label: 'Confirm how you found QR Master',
      done: Boolean(user.signupSourceSelfReported),
    },
    {
      id: 'use-case',
      label: 'Choose your use case',
      done: Boolean(user.primaryUseCase),
    },
    {
      id: 'first-qr',
      label: 'Create your first QR code',
      done: Boolean(user.firstQrCreatedAt),
    },
    {
      id: 'first-dynamic',
      label: 'Create your first dynamic QR code',
      done: Boolean(user.firstDynamicQrAt),
    },
    {
      id: 'download',
      label: 'Download your QR code',
      done: false,
    },
    {
      id: 'scan',
      label: 'Get your first scan',
      done: Boolean(user.firstScanAt),
    },
  ];
}