// src/clay/policies/credit-policy.ts
interface CreditPolicy {
  dailyLimit: number;
  perTableLimit: number;
  perBatchLimit: number;
  alertThresholdPct: number;
  hardStopEnabled: boolean;
}

const CREDIT_POLICIES: Record<string, CreditPolicy> = {
  conservative: {
    dailyLimit: 200,
    perTableLimit: 500,
    perBatchLimit: 100,
    alertThresholdPct: 70,
    hardStopEnabled: true,
  },
  standard: {
    dailyLimit: 500,
    perTableLimit: 2000,
    perBatchLimit: 500,
    alertThresholdPct: 80,
    hardStopEnabled: true,
  },
  aggressive: {
    dailyLimit: 2000,
    perTableLimit: 10000,
    perBatchLimit: 2000,
    alertThresholdPct: 90,
    hardStopEnabled: false, // Alert only, don't stop
  },
};

class CreditPolicyEnforcer {
  private dailyUsed = 0;
  private tableUsage = new Map<string, number>();

  constructor(private policy: CreditPolicy) {}

  checkBatch(tableId: string, rowCount: number, creditsPerRow: number): {
    allowed: boolean;
    reason?: string;
  } {
    const estimated = rowCount * creditsPerRow;

    // Batch limit
    if (estimated > this.policy.perBatchLimit) {
      return {
        allowed: false,
        reason: `Batch (${estimated} credits) exceeds per-batch limit (${this.policy.perBatchLimit}). Split into smaller batches.`,
      };
    }

    // Daily limit
    if (this.dailyUsed + estimated > this.policy.dailyLimit) {
      if (this.policy.hardStopEnabled) {
        return {
          allowed: false,
          reason: `Would exceed daily limit: ${this.dailyUsed} + ${estimated} > ${this.policy.dailyLimit}`,
        };
      }
      console.warn(`WARNING: Exceeding daily limit (${this.dailyUsed + estimated}/${this.policy.dailyLimit})`);
    }

    // Per-table limit
    const tableTotal = (this.tableUsage.get(tableId) || 0) + estimated;
    if (tableTotal > this.policy.perTableLimit) {
      return {
        allowed: false,
        reason: `Table ${tableId} would exceed limit: ${tableTotal} > ${this.policy.perTableLimit}`,
      };
    }

    // Alert threshold
    const dailyPct = ((this.dailyUsed + estimated) / this.policy.dailyLimit) * 100;
    if (dailyPct > this.policy.alertThresholdPct) {
      console.warn(`Credit alert: ${dailyPct.toFixed(0)}% of daily limit used`);
    }

    return { allowed: true };
  }

  recordUsage(tableId: string, credits: number) {
    this.dailyUsed += credits;
    this.tableUsage.set(tableId, (this.tableUsage.get(tableId) || 0) + credits);
  }
}

// src/clay/policies/privacy-policy.ts

// Fields that should NEVER be enriched or stored
const BLOCKED_ENRICHMENT_FIELDS = new Set([
  'ssn', 'social_security', 'tax_id',
  'date_of_birth', 'dob', 'birthday',
  'home_address', 'home_phone',
  'personal_phone', 'personal_mobile',
  'bank_account', 'credit_card',
  'medical_history', 'health_records',
  'salary', 'compensation',
  'political_affiliation', 'religion',
  'ethnic_origin', 'sexual_orientation',
]);

// Fields that require explicit consent
const CONSENT_REQUIRED_FIELDS = new Set([
  'personal_email', 'phone_number', 'mobile_phone',
]);

interface PrivacyCheckResult {
  allowed: boolean;
  violations: string[];
  warnings: string[];
}

function checkPrivacy(
  fieldsToEnrich: string[],
  hasExplicitConsent: boolean = false,
): PrivacyCheckResult {
  const violations: string[] = [];
  const warnings: string[] = [];

  for (const field of fieldsToEnrich) {
    const normalized = field.toLowerCase().replace(/[\s-]/g, '_');

    if (BLOCKED_ENRICHMENT_FIELDS.has(normalized)) {
      violations.push(`BLOCKED: "${field}" is a restricted field (never enrich)`);
    }

    if (CONSENT_REQUIRED_FIELDS.has(normalized) && !hasExplicitConsent) {
      warnings.push(`CONSENT: "${field}" requires explicit consent to enrich`);
    }
  }

  return {
    allowed: violations.length === 0,
    violations,
    warnings,
  };
}

// src/clay/policies/input-validation.ts

const PERSONAL_EMAIL_DOMAINS = new Set([
  'gmail.com', 'yahoo.com', 'hotmail.com', 'outlook.com', 'icloud.com',
  'aol.com', 'protonmail.com', 'mail.com', 'yandex.com', 'gmx.com',
]);

const DISPOSABLE_EMAIL_DOMAINS = new Set([
  'tempmail.com', 'guerrillamail.com', 'throwaway.email', 'yopmail.com',
  'mailinator.com', '10minutemail.com', 'trashmail.com',
]);

interface ValidationResult {
  valid: Record<string, unknown>[];
  rejected: { row: Record<string, unknown>; reason: string }[];
  stats: {
    total: number;
    valid: number;
    invalidDomain: number;
    personalDomain: number;
    disposableDomain: number;
    missingRequiredField: number;
    duplicates: number;
  };
}

function validateBatch(
  rows: Record<string, unknown>[],
  requiredFields: string[] = ['domain'],
): ValidationResult {
  const seen = new Set<string>();
  const stats = {
    total: rows.length, valid: 0, invalidDomain: 0,
    personalDomain: 0, disposableDomain: 0, missingRequiredField: 0, duplicates: 0,
  };
  const valid: Record<string, unknown>[] = [];
  const rejected: { row: Record<string, unknown>; reason: string }[] = [];

  for (const row of rows) {
    // Required fields check
    const missing = requiredFields.filter(f => !row[f]);
    if (missing.length > 0) {
      rejected.push({ row, reason: `Missing required: ${missing.join(', ')}` });
      stats.missingRequiredField++;
      continue;
    }

    const domain = String(row.domain || '').toLowerCase().trim();

    // Domain validation
    if (!domain.includes('.') || domain.length < 4) {
      rejected.push({ row, reason: `Invalid domain: "${domain}"` });
      stats.invalidDomain++;
      continue;
    }

    // Personal domain filter
    if (PERSONAL_EMAIL_DOMAINS.has(domain)) {
      rejected.push({ row, reason: `Personal email domain: ${domain}` });
      stats.personalDomain++;
      continue;
    }

    // Disposable domain filter
    if (DISPOSABLE_EMAIL_DOMAINS.has(domain)) {
      rejected.push({ row, reason: `Disposable email domain: ${domain}` });
      stats.disposableDomain++;
      continue;
    }

    // Deduplication
    const key = `${domain}:${String(row.first_name || '').toLowerCase()}:${String(row.last_name || '').toLowerCase()}`;
    if (seen.has(key)) {
      stats.duplicates++;
      continue;
    }
    seen.add(key);

    valid.push({ ...row, domain });
    stats.valid++;
  }

  return { valid, rejected, stats };
}

// src/clay/policies/export-policy.ts
type ExportDestination = 'crm' | 'outreach' | 'analytics' | 'csv';

const EXPORT_RULES: Record<ExportDestination, {
  allowedFields: string[];
  blockedFields: string[];
  requiresApproval: boolean;
}> = {
  crm: {
    allowedFields: ['email', 'first_name', 'last_name', 'company_name', 'job_title', 'icp_score'],
    blockedFields: ['personal_email', 'home_address'],
    requiresApproval: false,
  },
  outreach: {
    allowedFields: ['email', 'first_name', 'company_name', 'personalized_opener'],
    blockedFields: ['phone_number', 'linkedin_url', 'personal_email'],
    requiresApproval: false,
  },
  analytics: {
    allowedFields: ['company_name', 'industry', 'employee_count', 'icp_score'],
    blockedFields: ['email', 'first_name', 'last_name', 'phone_number'],
    requiresApproval: false,
  },
  csv: {
    allowedFields: ['*'], // All fields
    blockedFields: ['personal_email', 'home_address', 'ssn'],
    requiresApproval: true, // Requires manager approval for CSV export
  },
};

function filterForExport(
  rows: Record<string, unknown>[],
  destination: ExportDestination,
): Record<string, unknown>[] {
  const rules = EXPORT_RULES[destination];

  return rows.map(row => {
    const filtered: Record<string, unknown> = {};
    for (const [key, value] of Object.entries(row)) {
      if (rules.blockedFields.includes(key)) continue;
      if (rules.allowedFields[0] !== '*' && !rules.allowedFields.includes(key)) continue;
      filtered[key] = value;
    }
    return filtered;
  });
}