import { SmrtClassOptions } from '@happyvertical/smrt-core';
import { TenantUsageMetricCollection } from '../collections/TenantUsageMetricCollection.js';
import { AiUsageSummary, RecordUsageOptions, SummarizeAiUsageOptions, SummarizeUsageBatchOptions, SummarizeUsageOptions, UsageSummary } from '../types.js';
export declare class TenantUsageMeter {
    private readonly metrics;
    private readonly classOptions;
    constructor(metrics: TenantUsageMetricCollection, classOptions?: SmrtClassOptions);
    static create(classOptions?: SmrtClassOptions): Promise<TenantUsageMeter>;
    /**
     * Record one usage row.
     *
     * Accepts the polymorphic subscriber fields directly on the options object
     * (`subscriberKind`/`subscriberExternalId`); when omitted defaults to a
     * `'tenant'`-kind row keyed off `tenantId`. The collection layer enforces
     * the XOR invariant — passing `subscriberKind: 'external'` without a
     * non-empty `subscriberExternalId` throws.
     */
    record(options: RecordUsageOptions): Promise<void>;
    /**
     * Summarize usage over a window for a given subscriber.
     *
     * The `ai.*` short-circuit only fires for `'tenant'`-kind subscribers since
     * the `_smrt_ai_usage` system table is tenant-scoped; external subscribers
     * fall through to the normal `_smrt_tenant_usage_metrics` aggregation.
     */
    summarize(options: SummarizeUsageOptions): Promise<UsageSummary>;
    summarizeBatch(options: SummarizeUsageBatchOptions): Promise<UsageSummary[]>;
    summarizeAiUsage(options: SummarizeAiUsageOptions): Promise<AiUsageSummary>;
    getOptions(): SmrtClassOptions;
    private trySummarizeAiMetric;
    private hasAiUsageTable;
}
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