import type { SqliteAdapter as Database } from '../db/sqlite-adapter.js';
type BriefPeriod = 'today' | 'week';
export interface BriefTotals {
    sessions: number;
    requests: number;
    input_tokens: number;
    output_tokens: number;
    cache_read_tokens: number;
    cache_create_tokens: number;
    cache_create_5m_tokens: number;
    cache_create_1h_tokens: number;
    total_tokens: number;
    cost_usd: number;
    last_active: string | null;
}
export interface BriefPeriodSummary extends BriefTotals {
    label: string;
    period: BriefPeriod | 'since';
    since?: string;
}
export interface BriefMachineRow extends BriefTotals {
    machine_id: string;
    last_data_at: string | null;
    last_data_age: string;
}
export interface BriefAgentRow extends BriefTotals {
    agent: string;
}
export interface BriefAccountRow extends BriefTotals {
    account_key: string;
    account_tool: string;
    account_name: string;
    account_email: string | null;
    account_source: string;
}
export interface BriefFreshnessMachine {
    machine_id: string;
    max_request_at: string | null;
    request_age: string;
    last_merge_sync_at: string | null;
    merge_sync_age: string;
}
export interface EconomyBrief {
    generated_at: string;
    machine: string;
    since: {
        input: string;
        timestamp: string;
        label: string;
    };
    summaries: BriefPeriodSummary[];
    machines: BriefMachineRow[];
    agents: BriefAgentRow[];
    accounts: BriefAccountRow[];
    freshness: {
        machines: BriefFreshnessMachine[];
        max_request_line: string;
        merge_sync_line: string;
    };
}
export interface BriefOptions {
    since?: string;
    machine?: string;
    now?: Date;
    currentMachineId?: string;
    localSyncAt?: Date;
}
/** Human-readable age of a timestamp relative to now (never/<1m/Nm/Nh/Nd). */
export declare function formatAge(timestamp: string | null | undefined, now: Date): string;
export declare function buildBrief(db: Database, opts?: BriefOptions): EconomyBrief;
export {};
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