import type { Prisma } from '@prisma/client';
import type { Actor } from './record-scope';

export type PriorLens = 'off' | 'current' | 'archive';

export function actorPriorLens(actor: Pick<Actor, 'priorLens'> | undefined): PriorLens {
  return actor?.priorLens ?? 'off';
}

function hasCutoff(cutoff?: Date | null): cutoff is Date {
  return cutoff instanceof Date && !Number.isNaN(cutoff.getTime());
}

/** شخص/شرکت دیگر با این لنز فیلتر نمی‌شوند. */
export function personPriorWhere(_lens?: PriorLens): Prisma.PersonWhereInput {
  return {};
}

export function companyPriorWhere(_lens?: PriorLens): Prisma.CompanyWhereInput {
  return {};
}

export function dealPriorWhere(
  lens: PriorLens | undefined,
  cutoff?: Date | null,
): Prisma.DealWhereInput {
  if (lens !== 'current' && lens !== 'archive') return {};
  if (!hasCutoff(cutoff)) return {};
  if (lens === 'current') {
    return {
      OR: [
        { createdAt: { gte: cutoff } },
        { promotedFromPriorAt: { not: null } },
      ],
    };
  }
  return { createdAt: { lt: cutoff }, promotedFromPriorAt: null };
}

export function activityPriorWhere(
  lens: PriorLens | undefined,
  cutoff?: Date | null,
): Prisma.ActivityWhereInput {
  if (lens !== 'current' && lens !== 'archive') return {};
  if (!hasCutoff(cutoff)) return {};
  if (lens === 'current') {
    return {
      OR: [
        { createdAt: { gte: cutoff } },
        { promotedFromPriorAt: { not: null } },
      ],
    };
  }
  return { createdAt: { lt: cutoff }, promotedFromPriorAt: null };
}

/** فهرست شخص/شرکت: همیشه بدون فیلتر لنز (سازگاری با call-siteهای قدیمی). */
export function listPriorLens(
  _lens: PriorLens | undefined,
  _q: string | undefined,
  _explicitSource: boolean,
): PriorLens {
  return 'off';
}