/**
 * AnalyticsRepository - CRUD operations for analytics data
 *
 * Provides type-safe access to:
 * - Usage event tracking
 * - Experiment management
 * - ROI metrics storage
 * - Value attribution
 */
import type { Database as DatabaseType } from '../db/database-interface.js';
import type { UsageEvent, UsageEventInput, Experiment, ExperimentInput, ExperimentAssignment, ExperimentOutcome, OutcomeInput, ROIMetrics, ExperimentVariant, ExperimentStatus } from './types.js';
export type { UsageEventRow, ExperimentRow, ExperimentAssignmentRow, ExperimentOutcomeRow, ROIMetricsRow, } from './AnalyticsRepository.types.js';
/**
 * Repository for analytics operations
 */
export declare class AnalyticsRepository {
    private db;
    constructor(db: DatabaseType);
    /**
     * Record a skill usage event
     * SMI-992: Explicitly set timestamp from JS Date for fake timer compatibility
     */
    recordUsageEvent(input: UsageEventInput): UsageEvent;
    /**
     * Get a usage event by ID
     */
    getUsageEvent(id: string): UsageEvent | null;
    /**
     * Get usage events for a skill within a time period
     */
    getUsageEventsForSkill(skillId: string, startDate: string, endDate: string): UsageEvent[];
    /**
     * Get usage events for a user
     */
    getUsageEventsForUser(userId: string, startDate: string, endDate: string): UsageEvent[];
    /**
     * Get all usage events within a time period
     */
    getAllUsageEvents(startDate: string, endDate: string): UsageEvent[];
    /**
     * Delete usage events older than the retention period (30 days default)
     */
    cleanupOldEvents(retentionDays?: number): number;
    /**
     * Create a new experiment
     */
    createExperiment(input: ExperimentInput): Experiment;
    /**
     * Get an experiment by ID
     */
    getExperiment(id: string): Experiment | null;
    /**
     * Get experiment by name
     */
    getExperimentByName(name: string): Experiment | null;
    /**
     * Update experiment status
     */
    updateExperimentStatus(id: string, status: ExperimentStatus): boolean;
    /**
     * Get all active experiments
     */
    getActiveExperiments(): Experiment[];
    /**
     * Assign a user to an experiment variant
     */
    assignUserToExperiment(experimentId: string, userId: string, variant: ExperimentVariant): ExperimentAssignment;
    /**
     * Get user's assignment for an experiment
     */
    getUserAssignment(experimentId: string, userId: string): ExperimentAssignment | null;
    /**
     * Get all assignments for an experiment
     */
    getExperimentAssignments(experimentId: string): ExperimentAssignment[];
    /**
     * Record an experiment outcome
     */
    recordOutcome(input: OutcomeInput): ExperimentOutcome;
    /**
     * Get outcomes for an experiment
     */
    getExperimentOutcomes(experimentId: string): ExperimentOutcome[];
    /**
     * Store computed ROI metrics
     */
    storeROIMetrics(metrics: Omit<ROIMetrics, 'id' | 'createdAt'>): ROIMetrics;
    /**
     * Get ROI metrics for a period
     */
    getROIMetrics(metricType: string, startDate: string, endDate: string): ROIMetrics[];
    /**
     * Get ROI metrics for a specific entity (user or skill)
     */
    getEntityROIMetrics(entityId: string, startDate: string, endDate: string): ROIMetrics[];
}
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