import type {
  IEmailDnsRecordIntent,
  TDnsRecordStatus,
} from '../../ts_interfaces/data/email-domain.js';

/** Project one durable reconciliation intent into the operator-facing DNS status. */
export function projectMailDnsIntentStatus(
  intent: IEmailDnsRecordIntent | undefined,
): TDnsRecordStatus {
  if (!intent) return 'unchecked';
  if (
    intent.verificationOutcome === 'duplicate'
    || intent.verificationOutcome === 'conflict'
    || intent.verificationOutcome === 'invalid'
    || intent.status === 'conflict'
    || intent.status === 'failed'
  ) return 'invalid';
  if (intent.verificationOutcome === 'missing') return 'missing';
  if (intent.verificationOutcome === 'valid' && intent.status === 'valid') return 'valid';
  return 'unchecked';
}

/** Aggregate matching intents with deterministic operator-facing precedence. */
export function projectMailDnsIntentAggregateStatus(
  intents: IEmailDnsRecordIntent[],
  predicate: (intent: IEmailDnsRecordIntent) => boolean,
): TDnsRecordStatus {
  const selected = intents.filter(predicate);
  if (selected.length === 0) return 'unchecked';
  const statuses = selected.map(projectMailDnsIntentStatus);
  if (statuses.includes('invalid')) return 'invalid';
  if (statuses.includes('missing')) return 'missing';
  if (statuses.includes('unchecked')) return 'unchecked';
  return 'valid';
}