/**
 * ZUI Typography System
 * Typography tokens based on ZeppOS 3.0 design specifications
 *
 * Text is the most direct way of expressing information. Font distinguishes
 * the layer and priority of information through size, weight, and style.
 */
import type { ThemeTypography } from '../core/types';
/**
 * Font family definitions
 * - primary: Noto Sans - main system font
 * - number: Zepp OS Number Regular - special digits display
 * - condensed: Zepp OS Number Condensed - workout numbers
 */
export declare const fontFamilies: {
    readonly primary: "Noto Sans";
    readonly number: "Zepp OS Number";
    readonly condensed: "Zepp OS Number Condensed";
};
/**
 * Typography scale for 480×480 resolution
 *
 * Based on Snellen theory:
 * - Optimal viewing distance: 25-50 cm
 * - Visual angle: 5 minutes of arc
 * - Minimum font size: 24px (Caption1)
 *
 * Line height = font size × 1.25
 */
export declare const fontSizes: {
    readonly caption1: {
        readonly size: 24;
        readonly lineHeight: 30;
    };
    readonly subheadline: {
        readonly size: 28;
        readonly lineHeight: 35;
    };
    readonly body: {
        readonly size: 32;
        readonly lineHeight: 40;
    };
    readonly title: {
        readonly size: 36;
        readonly lineHeight: 45;
    };
    readonly title1: {
        readonly size: 40;
        readonly lineHeight: 50;
    };
    readonly largeTitle: {
        readonly size: 48;
        readonly lineHeight: 60;
    };
};
/**
 * Font size entry type
 */
export interface FontSizeEntry {
    size: number;
    lineHeight: number;
}
/**
 * Font sizes configuration type
 */
export interface FontSizesConfig {
    caption1: FontSizeEntry;
    subheadline: FontSizeEntry;
    body: FontSizeEntry;
    title: FontSizeEntry;
    title1: FontSizeEntry;
    largeTitle: FontSizeEntry;
}
/**
 * Typography scale for other resolutions
 */
export declare const fontSizesByResolution: Record<number, FontSizesConfig>;
/**
 * Font weight definitions
 */
export declare const fontWeights: {
    readonly regular: 400;
    readonly medium: 500;
    readonly semibold: 600;
    readonly bold: 700;
};
/**
 * Line height calculation multiplier
 * Line height = font size × 1.25
 */
export declare const LINE_HEIGHT_MULTIPLIER = 1.25;
/**
 * Calculate line height from font size
 */
export declare function calculateLineHeight(fontSize: number): number;
export type FontSizeKey = keyof typeof fontSizes;
export type FontWeightKey = keyof typeof fontWeights;
export type FontFamilyKey = keyof typeof fontFamilies;
export interface TextStyle {
    fontFamily: string;
    fontSize: number;
    lineHeight: number;
    fontWeight: number;
}
/**
 * Text scrolling configuration for text that exceeds display space
 *
 * Speed: 100% screen width every 6800ms
 * For 480px screen: ~71px per 1000ms
 * Pause at start: 2000ms before restart
 */
export declare const textScrollConfig: {
    readonly speedPerMs: number;
    readonly pauseDuration: 2000;
    /**
     * Calculate scroll duration for given text width
     */
    readonly getScrollDuration: (textWidth: number, screenWidth?: number) => number;
};
export type TextCase = 'none' | 'uppercase' | 'lowercase' | 'capitalize' | 'titleCase' | 'sentenceCase';
/**
 * Apply text case transformation
 * @param text - Input text
 * @param textCase - Case transformation type
 */
export declare function applyTextCase(text: string, textCase: TextCase): string;
/**
 * Predefined title styles for common use cases
 */
export declare const titleStyles: {
    readonly pageTitle: {
        readonly size: 32;
        readonly lineHeight: 40;
        readonly weight: 500;
    };
    readonly sectionTitle: {
        readonly size: 28;
        readonly lineHeight: 35;
        readonly weight: 500;
    };
    readonly cardTitle: {
        readonly size: 24;
        readonly lineHeight: 30;
        readonly weight: 500;
    };
    readonly listTitle: {
        readonly size: 22;
        readonly lineHeight: 28;
        readonly weight: 400;
    };
};
/**
 * Default typography theme
 */
export declare const defaultTypography: ThemeTypography;
/**
 * Get complete text style by size key and optional weight
 */
export declare function getTextStyle(size: FontSizeKey, weight?: FontWeightKey, family?: FontFamilyKey): TextStyle;
/**
 * Get font sizes for specific screen resolution
 */
export declare function getFontSizesForResolution(resolution: number): FontSizesConfig;
/**
 * Calculate minimum font size for a screen
 * Based on Snellen theory: size = 0.0143 × PPI × 5
 *
 * @param ppi - Pixels per inch
 */
export declare function calculateMinFontSize(ppi: number): number;
/**
 * Check if text needs scrolling
 * @param textWidth - Width of rendered text
 * @param containerWidth - Width of container
 */
export declare function needsScrolling(textWidth: number, containerWidth: number): boolean;
/**
 * Create text style object for ZeppOS widget
 */
export declare function createTextStyleOptions(size: FontSizeKey, weight?: FontWeightKey, color?: number): Record<string, unknown>;
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