/**
 * Scrollable log viewer overlay component for tmux-pilot.
 *
 * Displays captured `[tmux-pilot]` log entries from the ring buffer
 * with level-based colouring, keyboard scrolling, and DynamicBorder
 * top/bottom borders.
 */
import type { Theme } from "@earendil-works/pi-coding-agent";
import { type Component } from "@earendil-works/pi-tui";
/**
 * Scrollable log viewer overlay.
 *
 * Renders entries from the shared `logBuffer` ring buffer with:
 *   DynamicBorder (top, accent)
 *   Title bar (centred "tmux-pilot debug log")
 *   Scrollable log entry list
 *   DynamicBorder (bottom, accent)
 *
 * Keyboard controls:
 *   Arrow Up/Down   – scroll one line
 *   Page Up/Down    – scroll one page (PAGE_SIZE lines)
 *   Home            – scroll to top
 *   End             – scroll to bottom
 *   Escape          – close overlay via the onClose callback
 */
export declare class LogViewerComponent implements Component {
    private readonly onClose;
    private readonly theme?;
    private scrollTop;
    private topBorder;
    private bottomBorder;
    private entries;
    /** Estimated visible content lines (viewport minus borders + title). */
    private estimatedHeight;
    /** Whether the user is currently at the bottom (auto-scroll on invalidate). */
    private atBottom;
    /**
     * @param onClose – called when Escape is pressed
     * @param theme   – optional theme used for border and level colouring.
     *                  When omitted, ANSI styling is skipped.
     */
    constructor(onClose: () => void, theme?: Theme | undefined);
    render(width: number): string[];
    handleInput(data: string): void;
    invalidate(): void;
    /** Re-read entries from the ring buffer. */
    private syncEntries;
    /** Scroll to show the last page of entries. */
    private scrollToEnd;
    /**
     * Build a centred title line padded with `─` characters.
     *
     * Example (width = 40):
     *   ────────── tmux-pilot debug log ──────────
     */
    private buildTitleLine;
    /**
     * Format a single LogEntry into a display line.
     *
     * Output format:
     *   [HH:MM:SS] [level] [prefix] message
     *
     * The level token is coloured when a theme is available:
     *   log   → dim
     *   warn  → warning
     *   error → error
     */
    private formatEntry;
    /**
     * Apply ANSI colouring for the entry level using the theme, if available.
     * Falls back to the raw text when no theme is set.
     */
    private colouriseLevel;
}
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