/** Analytics engine: scoring calibration, drop patterns, and genre evolution. */
import type { AniListMediaListEntry } from "../types.js";
export interface GenreCalibration {
    genre: string;
    userMean: number;
    communityMean: number;
    delta: number;
    count: number;
}
export interface CalibrationResult {
    overallDelta: number;
    tendency: "high" | "low" | "balanced";
    genreCalibrations: GenreCalibration[];
    totalScored: number;
}
export interface DropCluster {
    label: string;
    type: "genre" | "tag";
    dropCount: number;
    totalCount: number;
    dropRate: number;
    medianDropPoint: number;
}
export interface DropAnalysis {
    totalDropped: number;
    clusters: DropCluster[];
    earlyDrops: number;
    avgDropProgress: number;
}
export interface GenreEra {
    period: string;
    startYear: number;
    endYear: number;
    topGenres: string[];
    count: number;
}
export interface EvolutionResult {
    eras: GenreEra[];
    shifts: string[];
}
/** Per-genre scoring bias relative to community consensus */
export declare function computeCalibration(entries: AniListMediaListEntry[]): CalibrationResult;
/** Genre and tag clusters in a user's dropped titles */
export declare function analyzeDrops(droppedEntries: AniListMediaListEntry[], allEntries: AniListMediaListEntry[]): DropAnalysis;
/** How genre preferences shifted across time windows */
export declare function computeGenreEvolution(entries: AniListMediaListEntry[], windowYears?: number): EvolutionResult;