import { SmrtCollection } from '@happyvertical/smrt-core';
import { AttributionPolicy } from '../models/AttributionPolicy.js';
import { AttributionConflictBehavior, AttributionCreditMode, AttributionPolicyStatus } from '../types.js';
/**
 * Fields an amendment may change relative to the version it copies.
 * `policyKey` is fixed (it identifies the policy), `version` is computed,
 * and `status` is always `draft` — a caller cannot mint a pre-activated
 * amendment.
 */
export interface AttributionPolicyAmendmentChanges {
    windowDays?: number;
    creditMode?: AttributionCreditMode;
    conflictBehavior?: AttributionConflictBehavior;
    allowSelfReferral?: boolean;
    allowExistingClients?: boolean;
    eligibleServices?: string[];
    eligibleCampaigns?: string[];
    eligibleRegions?: string[];
    effectiveFrom?: Date | null;
    metadata?: Record<string, unknown>;
}
export declare class AttributionPolicyCollection extends SmrtCollection<AttributionPolicy> {
    static readonly _itemClass: typeof AttributionPolicy;
    /** Every version of a policy, newest version first. */
    findByPolicyKey(policyKey: string): Promise<AttributionPolicy[]>;
    /** Policies by status. */
    findByStatus(status: AttributionPolicyStatus): Promise<AttributionPolicy[]>;
    /**
     * The highest ACTIVE version of a policy already IN EFFECT at `at`, or
     * `null` when none is. This is what `AttributionService.resolve()` loads
     * when the caller doesn't pin a version. A future-dated amendment can be
     * activated ahead of its effective date without governing attributions
     * resolved before it takes effect (`effectiveFrom: null` = effective
     * immediately).
     */
    latestActiveByKey(policyKey: string, at?: Date, tenantId?: string | null): Promise<AttributionPolicy | null>;
    /**
     * Create an amendment: insert a new DRAFT row with
     * `version = max(existing versions) + 1`, copying the latest existing
     * version's fields and then applying `changes`. The source version is not
     * touched — activate the draft (and supersede the prior active version)
     * as a separate, explicit step.
     *
     * Throws when no version of `policyKey` exists (nothing to amend — use
     * `create` for a brand-new policy).
     */
    createAmendment(policyKey: string, changes?: AttributionPolicyAmendmentChanges): Promise<AttributionPolicy>;
}
export default AttributionPolicyCollection;
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