import { FieldValueResponse } from '@/services/agents.service';

// Experience data structure expected by ExperienceSection component
export interface ExperienceData {
  years: string;
  contracts: string;
  licensingAreas: string[];
  expertiseYears: { area: string; years: string }[];
  certifications: { name: string; org: string }[];
}

// Certification entry from repeater field
interface CertificationEntry {
  certification_name?: string;
  issuing_organization?: string;
  issue_date?: string;
  expiration_date?: string;
}

// Helper to get field value by slug
function getFieldValue(fieldValues: FieldValueResponse[], slug: string): unknown {
  const field = fieldValues.find(f => f.fieldSlug === slug);
  return field?.value;
}

// Helper to get label from value for select/radio fields
function mapYearsValueToLabel(value: string | undefined): string {
  if (!value) return '-';

  const mapping: Record<string, string> = {
    '<2': 'Less than 2 years',
    '2+': '2+ years',
    '5+': '5+ years',
    '10+': '10+ years',
  };

  return mapping[value] || value;
}

// Helper to format contracts count
function formatContractsCount(value: unknown): string {
  if (!value) return '-';

  const num = typeof value === 'number' ? value : parseInt(String(value), 10);
  if (isNaN(num)) return '-';

  if (num >= 100) return '100+ Contracts';
  if (num >= 50) return '50+ Contracts';
  if (num >= 20) return '20+ Contracts';
  if (num >= 10) return '10+ Contracts';
  if (num >= 5) return '5+ Contracts';
  return `${num} Contract${num !== 1 ? 's' : ''}`;
}

// Parse expertise areas with years (format: "Area Name - X yrs" or just "Area Name")
function parseExpertiseAreas(value: unknown): { area: string; years: string }[] {
  if (!value || !Array.isArray(value)) return [];

  return value.map((item: string) => {
    // Check if it contains a year indicator
    const yearMatch = item.match(/^(.+?)\s*[-–]\s*(\d+)\s*(yrs?|years?)$/i);
    if (yearMatch) {
      return { area: yearMatch[1].trim(), years: `${yearMatch[2]} yrs` };
    }
    // Just area name without years
    return { area: item.trim(), years: '' };
  });
}

// Parse certification entries from repeater field
function parseCertifications(value: unknown): { name: string; org: string }[] {
  if (!value) return [];

  // If it's an array of certification entries
  if (Array.isArray(value)) {
    return value
      .filter((entry: CertificationEntry) => entry?.certification_name)
      .map((entry: CertificationEntry) => ({
        name: entry.certification_name || '',
        org: entry.issuing_organization || '',
      }));
  }

  return [];
}

/**
 * Maps field values from API response to ExperienceData structure
 */
export function mapFieldValuesToExperience(fieldValues: FieldValueResponse[]): ExperienceData {
  // Get years in business (could be years_in_business from Professional or Lender experience)
  const yearsInBusiness = getFieldValue(fieldValues, 'years_in_business') as string | undefined;

  // Get contracts completed
  const contractsCompleted = getFieldValue(fieldValues, 'contracts_completed');

  // Get licensing areas (could be licensed_areas from Professional or Lender)
  const licensedAreas = getFieldValue(fieldValues, 'licensed_areas') as string[] | undefined;

  // Get expertise areas with years
  const expertiseAreas = getFieldValue(fieldValues, 'expertise_areas') as string[] | undefined;

  // Get certification entries from repeater
  const certificationEntries = getFieldValue(fieldValues, 'certification_entries');

  return {
    years: mapYearsValueToLabel(yearsInBusiness),
    contracts: formatContractsCount(contractsCompleted),
    licensingAreas: licensedAreas || [],
    expertiseYears: parseExpertiseAreas(expertiseAreas),
    certifications: parseCertifications(certificationEntries),
  };
}

/**
 * Check if experience data has any meaningful content
 */
export function hasExperienceData(experience: ExperienceData): boolean {
  return (
    experience.years !== '-' ||
    experience.contracts !== '-' ||
    experience.licensingAreas.length > 0 ||
    experience.expertiseYears.length > 0 ||
    experience.certifications.length > 0
  );
}