import type { RunRow } from "../rows.js";
export type SortKey = "date" | "score" | "cost" | "time" | "agent" | "suite";
export type GroupKey = "none" | "agent" | "suite";
export type GroupAggregates = {
    /** Latest non-null start among members. */
    date: number | null;
    /** Mean over graded members only. */
    score: number | null;
    /** Sum over members with known cost. */
    cost: number | null;
    /** Sum over members with known wall time — "total machine time
     *  spent", deliberately NOT the elapsed envelope a single run's time
     *  column shows: group members usually span days, so an envelope
     *  would mostly measure the gaps between runs. */
    time: number | null;
    agent: string;
    suite: string;
};
export type GroupHeaderRow = {
    kind: "groupHeader";
    key: string;
    group: "agent" | "suite";
    label: string;
    memberKeys: string[];
    count: number;
    aggregates: GroupAggregates;
    expanded: boolean;
};
export type DisplayRow = {
    kind: "run";
    key: string;
    row: RunRow;
} | GroupHeaderRow;
export type TableState = {
    sort: SortKey;
    ascending: boolean;
    group: GroupKey;
    expandedGroupKeys: string[];
    cursorKey: string | null;
    cursorIndexHint: number;
};
export type TableProjection = {
    rows: DisplayRow[];
    cursorIndex: number | null;
    cursorKey: string | null;
};
export type TableAction = {
    kind: "move";
    delta: number;
} | {
    kind: "sortNext";
} | {
    kind: "sortDirection";
} | {
    kind: "groupNext";
} | {
    kind: "toggleGroup";
};
export declare function initialTableState(): TableState;
export declare function projectTable(rows: RunRow[], state: TableState): TableProjection;
export declare function updateTable(state: TableState, action: TableAction, rows: RunRow[]): TableState;