import { type ConversationWordsQuery } from './conversation-word-frequency.js';
export interface ConversationActivityBucket {
    hour: number;
    weekday: number | null;
    messages: number;
    systemMessages: number;
    participants: number;
}
export interface ConversationActivityResult {
    id: string;
    updatedAt: number;
    fromAt: number | null;
    toAt: number | null;
    totalMessages: number;
    systemMessages: number;
    activeDays: number;
    participants: number;
    hourly: ConversationActivityBucket[];
    weekly: ConversationActivityBucket[];
}
export interface ConversationActivityState {
    supported: boolean;
    stale: boolean;
    result: ConversationActivityResult | null;
    progress: {
        completed: number;
        total: number;
    } | null;
}
export interface ConversationActivitySelection {
    hour: number;
    weekday: number | null;
}
export declare const activityKinds: readonly ["text", "image", "voice", "video", "file", "call", "mixed", "card", "system", "other"];
export interface ConversationActivityMessage {
    key: string;
    sourceRef: string | null;
    senderName: string;
    preview: string;
    sentAt: number;
    kind: typeof activityKinds[number];
}
export interface ConversationActivityMessages {
    items: ConversationActivityMessage[];
    total: number;
    nextCursor: string | null;
}
export declare const unavailableConversationActivity: () => ConversationActivityState;
export declare function parseActivitySelection(value: unknown): ConversationActivitySelection;
export declare function assertActivityEnvelope(v: Record<string, unknown>, q: ConversationWordsQuery, sessionUid: string): void;
export declare function parseConversationActivity(value: unknown, q: ConversationWordsQuery, sessionUid: string): ConversationActivityState;
/** Validate the message's actual local time, not its upload/sync time. */
export declare function activityMessageMatches(at: number, q: ConversationWordsQuery, selection: ConversationActivitySelection): boolean;
export declare function parseActivityMessages(value: unknown, q: ConversationWordsQuery, sessionUid: string, resultId: string, selection: ConversationActivitySelection): ConversationActivityMessages;
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