import type { Theme } from "@earendil-works/pi-coding-agent";
import type { ConfigTuiState } from "../state/model.js";
/** Themed horizontal rule spanning the full width. */
export declare function rule(width: number, theme: Theme): string;
/**
 * Compute a windowed slice of `items` around `cursor` so that long lists fit
 * inside `maxRows`. Returns the visible items, their absolute start index,
 * and scroll indicator counts. Default window: 10 rows.
 */
export declare function windowList<T>(items: T[], cursor: number, maxRows?: number): {
    visible: T[];
    start: number;
    aboveCount: number;
    belowCount: number;
};
export declare function authBadgeFor(state: ConfigTuiState, provider: string, theme: Theme): string;
export declare function authStatusLine(state: ConfigTuiState, theme: Theme): string;
export declare function resolvedSummary(state: ConfigTuiState, theme: Theme): string;
export declare function formatOverride(override: string | {
    provider: string;
    model: string;
} | undefined): string;
/** Render the four-rule cascade footer in plain English.
 *  This is the "How models get picked" section from Screen 3. */
export declare function cascadeFooter(width: number, theme: Theme): string[];
/** Render a tier badge like "Heavy", "Standard", "Light" in themed color. */
export declare function tierBadge(tier: "heavy" | "standard" | "light", theme: Theme): string;
/** Width-safe final guard: truncate every line to the given terminal width. */
export declare function safeLines(lines: string[], width: number): string[];
/**
 * Filter a list of items using fuzzy search.
 * When `query` is empty, returns items unfiltered (original order).
 * When non-empty, returns items matching the fuzzy query (best matches first).
 */
export declare function filterWithSearch<T>(items: T[], query: string, getText: (item: T) => string): T[];
/**
 * Render the search/filter input line.
 * Shows a prompt, the current query, a block cursor, and a hint when empty.
 */
export declare function renderFilterLine(query: string, theme: Theme): string;
/**
 * Render search result count line.
 */
export declare function renderResultCount(shown: number, total: number, theme: Theme): string;
/**
 * Determine if a raw key event represents a printable character suitable for
 * appending to a search query. Excludes control sequences, ESC sequences,
 * and other non-printable input.
 */
export declare function isPrintableInput(data: string): boolean;
/**
 * Process a search key event and return the updated query, or undefined if
 * the key is not search-related.
 *
 * - Printable characters: append to query
 * - Backspace: remove last character
 * - Ctrl+U / Ctrl+W: clear entire query
 *
 * Returns the new query string, or `undefined` if the key isn't a search action.
 */
export declare function handleSearchKey(currentQuery: string, data: string): string | undefined;