import type { ActualCostSource, CostAttribution, CostLimit } from '@fabric-harness/sdk';
import type { DatabricksStatementClient, StatementPoll } from './sql-exec.js';
export interface DatabricksActualCostSourceOptions {
    /** Cache TTL in milliseconds. Default 60_000. */
    cacheTtlMs?: number;
    /** Tag key prefix for filtering usage rows. Default `'fabric'`. */
    tagPrefix?: string;
    /** Polling configuration for statement execution. */
    poll?: StatementPoll;
}
export interface DatabricksCostReconciliationOptions {
    scopeKey: string;
    estimatedUsd: number;
    usageOccurredAt: string | number | Date;
    attribution?: CostAttribution;
    actualSource: ActualCostSource;
    /** Billing export delay before a comparison is meaningful. Default 24 hours. */
    accountingDelayMs?: number;
    maxDriftUsd?: number;
    maxDriftPercent?: number;
    unavailable?: 'fail-open' | 'fail-closed';
    now?: () => number;
    onDrift?: (result: DatabricksCostReconciliationResult) => void | Promise<void>;
}
export interface DatabricksCostReconciliationResult {
    scopeKey: string;
    status: 'pending-accounting' | 'within-threshold' | 'drift' | 'unavailable';
    enforcement: 'allow' | 'deny';
    estimatedUsd: number;
    actualUsd?: number;
    driftUsd?: number;
    driftPercent?: number;
    actualsFetchedAt?: string;
    nextCheckAt?: string;
    error?: string;
}
/** Compare immediate estimates with delayed System Tables actuals and apply an explicit outage policy. */
export declare function reconcileDatabricksCost(options: DatabricksCostReconciliationOptions): Promise<DatabricksCostReconciliationResult>;
/**
 * Create a Databricks-backed `ActualCostSource` that queries `system.billing.usage`
 * joined to `system.billing.list_prices` for real spend data.
 *
 * Results are cached per-scope-key for `cacheTtlMs` (default 60s) to avoid
 * hammering the SQL warehouse.
 */
export declare function databricksActualCostSource(client: DatabricksStatementClient, warehouseId: string, options?: DatabricksActualCostSourceOptions): ActualCostSource;
export declare function databricksTenantCostLimit(client: DatabricksStatementClient, warehouseId: string, tenantId: string, options: {
    perHourUsd?: number;
    perDayUsd?: number;
    perMonthUsd?: number;
    cacheTtlMs?: number;
    onExceed?: 'throw' | 'approve';
}): CostLimit;
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