import type { CityName } from "../../municipal/utils/types";
import type { SubjectItem, TicketStatsDateScope } from "../../municipal/tickets/tickets.types";
import type { CallsHourlyBucket, CallsRoutingAggregation, CallsStatsFilter, CallsSummaryAggregation, CallsTrendBucket, ResolvedTimeBucket } from "./calls.statistics.types";
export declare const rangeDurationDays: (startStr: string, endStr: string) => number;
/**
 * Number of distinct calendar months the [startStr, endStr] range spans, inclusive.
 * Counts month boundaries rather than 30-day periods: e.g. Jan 31 -> Feb 1 returns 2.
 */
export declare const rangeDurationMonths: (startStr: string, endStr: string) => number;
/**
 * Chooses how the client calls-over-time bar chart groups each column:
 * one bar per day, week, or calendar month. Short ranges stay daily; longer
 * ones switch to weekly or monthly so the chart does not show hundreds of bars.
 */
export declare const resolveTimeBucketFromRange: (startStr: string, endStr: string) => ResolvedTimeBucket;
export declare const aggregateCallsSummary: (filter: CallsStatsFilter) => Promise<CallsSummaryAggregation>;
export declare const aggregateCallsTrend: (filter: CallsStatsFilter, bucket: ResolvedTimeBucket) => Promise<CallsTrendBucket[]>;
export declare const aggregateCallsHourlyByRange: (filter: CallsStatsFilter) => Promise<CallsHourlyBucket[]>;
export declare const aggregateCallsRouting: (filter: CallsStatsFilter) => Promise<CallsRoutingAggregation>;
export declare const findFilteredCallSids: (filter: CallsStatsFilter) => Promise<string[]>;
/**
 * "Subjects" panel: ticket count per subject, for calls passing the filters.
 * Calls and tickets are in separate DBs, so we join in code — filtered call IDs
 * from calls, subjects from tickets. Returns the full list sorted most-common
 * first; callers slice if they want a top-N.
 */
export declare const findSubjectsByCityAndDateRange: (cityName: CityName, filter: CallsStatsFilter, dateScope: TicketStatsDateScope) => Promise<SubjectItem[]>;
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