/**
 * Text formatting utilities for display and context estimation
 */
import type { Message, Model } from '../types/index.js';
/**
 * Estimate token count from text using character-based approximation
 * Rule: ~4 characters per token (conservative estimate)
 */
export declare function estimateTokens(text: string): number;
/**
 * Estimate total tokens in a conversation
 */
export declare function estimateConversationTokens(messages: Message[]): number;
/**
 * Calculate context usage percentage for a model
 */
export declare function calculateContextUsage(messages: Message[], model: Model): number;
/**
 * Format context usage as percentage string
 */
export declare function formatContextUsage(usage: number): string;
/**
 * Format model name for display
 * Example: "anthropic/claude-3-opus" -> "Claude 3 Opus"
 */
export declare function formatModelName(modelId: string): string;
/**
 * Format timestamp for display
 * Example: "2025-11-08T10:00:00Z" -> "10:00 AM"
 */
export declare function formatTimestamp(timestamp: string | number): string;
/**
 * Format date and time for display
 * Example: "2025-11-08T10:00:00Z" -> "Nov 8, 10:00 AM"
 */
export declare function formatDateTime(isoTimestamp: string): string;
/**
 * Format duration in milliseconds to human-readable string
 */
export declare function formatDuration(milliseconds: number): string;
/**
 * Truncate text to a maximum length with ellipsis
 */
export declare function truncate(text: string, maxLength: number): string;
/**
 * Format price from string to human-readable format
 * Example: "0.000015" -> "$0.000015"
 */
export declare function formatPrice(priceString: string): string;
/**
 * Format token count with thousands separator
 * Example: 150000 -> "150,000"
 */
export declare function formatTokenCount(tokens: number): string;
/**
 * Pluralize a word based on count
 */
export declare function pluralize(word: string, count: number): string;
/**
 * Format message count
 * Example: 5 -> "5 messages", 1 -> "1 message"
 */
export declare function formatMessageCount(count: number): string;
/**
 * Word wrap text to a maximum line width
 */
export declare function wordWrap(text: string, maxWidth: number): string;
/**
 * Strip ANSI color codes from text
 */
export declare function stripAnsi(text: string): string;
/**
 * Get display width of text (accounting for multi-byte characters)
 */
export declare function getDisplayWidth(text: string): number;
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