import type { HtmlTagDescriptor } from 'vite';
export interface FontFallbackConfig {
    /**
     * System fonts to use as fallback bases.
     * When not provided, fontaine auto-selects by category.
     * @example ['Arial', 'Helvetica Neue']
     */
    fallbacks?: string[];
    /**
     * Generic font category. Used to auto-select system fallbacks
     * when `fallbacks` is not provided.
     * @default 'sans-serif'
     */
    category?: 'sans-serif' | 'serif' | 'monospace';
    /**
     * Override the generated fallback font-face name.
     * @default '{familyName} fallback'
     */
    name?: string;
}
export interface Options {
    /** Custom font families loaded from local files. */
    custom?: CustomFonts;
    /** Font families loaded from Fontsource packages. */
    fontsource?: FontsourceFonts;
    /** Font families loaded from Google Fonts. */
    google?: GoogleFonts;
    /** Font families loaded from Adobe Typekit. */
    typekit?: TypeKitFonts;
    /** Enable sourcemap generation for virtual CSS modules. */
    sourcemap?: string;
    /**
     * Inline `@font-face` rules into the HTML as a `<style>` tag
     * instead of keeping them in the external CSS bundle.
     * Reduces render-blocking requests and can improve LCP.
     * @default false
     */
    inlineFontFace?: boolean;
}
export interface CustomFontFace {
    /** Original glob source pattern that matched this font face. */
    source: string;
    /** Font family name. */
    name: string;
    /** Base filename without extension. */
    basename: string;
    /** Font weight value or range inferred from the filename. */
    weight: number | `${number} ${number}`;
    /** Font style inferred from the filename (e.g. 'normal', 'italic'). */
    style: string;
    /** Value for the `font-display` descriptor. */
    display: string;
    /** Local font name(s) for `src: local()` in the `@font-face` rule. */
    local?: string | string[];
    /** Resolved font files matching the source pattern. */
    files: {
        /** Absolute path to the font file on disk. */
        src: string;
        /** File extension (e.g. '.woff2'). */
        ext: string;
        /** Public-facing URL path for the font file. */
        path: string;
        /** CSS font format string (e.g. 'woff2', 'truetype'). */
        format: string;
    }[];
}
export interface CustomFontFamily {
    /**
     * Name of the font family.
     * @example 'Comic Sans MS'
     */
    name: string;
    /**
     * Regex(es) of font files to import. The names of the files will
     * predicate the `font-style` and `font-weight` values of the `@font-rule`'s.
     * @see https://developer.mozilla.org/en-US/docs/Web/CSS/font-weight#common_weight_name_mapping
     *
     * @example
     * A value of `./RobotoBoldItalic.*` will create this `@font-rule`:
     *
     * ```css
     * font-face {
     *    font-family: 'Roboto';
     *    src: url(./RobotoBoldItalic.ttf) format('truetype')
     *         url(./RobotoBoldItalic.woff) format('woff')
     *         url(./RobotoBoldItalic.woff2) format('woff2');
     *    font-weight: bold;
     *    font-style: italic;
     *    font-display: auto;
     * }
     * ```
     */
    src: string | string[];
    /**
     * Local name of the font. Used to add `src: local()` to `@font-rule`.
     * @see https://developer.mozilla.org/en-US/docs/Web/CSS/@font-face#description
     */
    local?: string | string[];
    /**
     * Allows to transform the generated config for any font face.
     *
     * @param font
     * @returns
     */
    transform?: (font: CustomFontFace) => CustomFontFace | null;
    /**
     * Generate a fallback @font-face with adjusted metrics to reduce CLS.
     * Uses fontaine to compute size-adjust, ascent-override, descent-override,
     * and line-gap-override from the font file.
     */
    fallback?: FontFallbackConfig;
}
export interface CustomFonts {
    /**
     * Font families.
     */
    families: CustomFontFamily[] | Record<string, string | string[] | Omit<CustomFontFamily, 'name'>>;
    /**
     * Defines the default `font-display` value used for the generated
     * `@font-rule` classes.
     * @see https://developer.mozilla.org/fr/docs/Web/CSS/@font-face/font-display
     * @default 'auto'
     */
    display?: 'auto' | 'block' | 'swap' | 'fallback' | 'optional';
    /**
     * Using `<link rel="preload">` will trigger a request for the WebFont
     * early in the critical rendering path, without having to wait for the
     * CSSOM to be created.
     * @see https://web.dev/optimize-webfont-loading/#preload-your-webfont-resources
     * @default true
     */
    preload?: boolean;
    /**
     * Using `<link rel="prefetch">` is intended for prefetching resources
     * that will be used in the next navigation/page load
     * (e.g. when you go to the next page)
     *
     * Note: this can not be used with `preload`
     * @default false
     */
    prefetch?: boolean;
    /**
     * URL prefix prepended to font paths when using prefetch.
     */
    prefetchPrefix?: string;
    /**
     * Provides a hook for filtering which `<link>` tags should be actually
     * generated.
     * @default true
     */
    linkFilter?: (tags: HtmlTagDescriptor[]) => HtmlTagDescriptor[] | boolean;
    /**
     * @default: 'head-prepend'
     */
    injectTo?: 'head' | 'body' | 'head-prepend' | 'body-prepend';
    /**
     * Remove the prefix from the front path
     * @default: 'public/'
     */
    stripPrefix?: string;
}
interface BaseFontsourceFontFamily {
    /**
     * Name of the font family.
     * @example 'Roboto'
     */
    name: string;
    /**
     * Font styles to load.
     * @default ['normal']
     */
    styles?: ('italic' | 'normal')[];
    /**
     * Font subset to load (e.g. 'latin', 'latin-ext').
     */
    subset?: string;
    /**
     * Generate a fallback @font-face with adjusted metrics to reduce CLS.
     * Uses fontaine to look up font metrics by family name.
     */
    fallback?: FontFallbackConfig;
}
interface WeightsFontsourceFontFamily extends BaseFontsourceFontFamily {
    /**
     * Font weights to load.
     * @example [400, 700]
     */
    weights: (100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900)[];
}
interface VariableFontsourceFontFamily extends BaseFontsourceFontFamily {
    /**
     * Enable variable font axes. Set to `true` to load the default
     * variable font, or specify individual axes to load.
     */
    variable: true | {
        /** Weight axis. */
        wght?: boolean;
        /** Width axis. */
        wdth?: boolean;
        /** Slant axis. */
        slnt?: boolean;
        /** Optical size axis. */
        opsz?: boolean;
        /** Italic axis. */
        ital?: boolean;
    };
}
export type FontsourceFontFamily = WeightsFontsourceFontFamily | VariableFontsourceFontFamily;
export interface FontsourceFonts {
    /**
     * Font families to load from Fontsource.
     * Can be strings (load default set) or objects for fine-grained control.
     */
    families: (string | FontsourceFontFamily)[];
}
export interface GoogleFontFamily {
    /**
     * Font family name.
     * @example 'Roboto'
     */
    name: string;
    /**
     * Font styles/weights to load using the Google Fonts CSS2 API format.
     * @example 'ital,wght@0,400;1,200'
     */
    styles?: string;
    /**
     * Enable non-blocking renderer using `<link rel="preload">`.
     * @default true
     */
    defer?: boolean;
    /**
     * Generate a fallback @font-face with adjusted metrics to reduce CLS.
     * Uses fontaine to look up font metrics by family name.
     */
    fallback?: FontFallbackConfig;
}
export interface GoogleFonts {
    /**
     * Font families to load from Google Fonts.
     * Can be strings (only regular 400 will be loaded) or objects for fine-grained control.
     */
    families: (string | GoogleFontFamily)[];
    /**
     * Subset the font to only include glyphs needed for the given text.
     * @see https://developers.google.com/fonts/docs/css2#optimizing_your_font_requests
     */
    text?: string;
    /**
     * Font display strategy.
     * @default 'swap'
     */
    display?: 'auto' | 'block' | 'swap' | 'fallback' | 'optional';
    /**
     * Enable preconnect link injection to warm up the fonts origin.
     * @default true
     */
    preconnect?: boolean;
    /**
     * @default: 'head-prepend'
     */
    injectTo?: 'head' | 'body' | 'head-prepend' | 'body-prepend';
    /**
     * @default: 'https://fonts.googleapis.com/css2'
     */
    fontBaseUrl?: string;
    /**
     * @default: 'https://fonts.gstatic.com/'
     */
    preconnectUrl?: string;
}
export interface TypeKitFontFamily {
    /**
     * Font family name as it appears in the Typekit project.
     * @example 'Futura PT'
     */
    name: string;
    /**
     * Generate a fallback @font-face with adjusted metrics to reduce CLS.
     * Uses fontaine to look up font metrics by family name.
     */
    fallback?: FontFallbackConfig;
}
export interface TypeKitFonts {
    /**
     * Typekit project ID.
     * @example 'abc1def'
     */
    id: string;
    /**
     * Enable non-blocking renderer using `<link rel="preload">`.
     * @default true
     */
    defer?: boolean;
    /**
     * default: 'head-prepend'
     */
    injectTo?: 'head' | 'body' | 'head-prepend' | 'body-prepend';
    /**
     * @default: 'https://use.typekit.net/'
     */
    fontBaseUrl?: string;
    /**
     * Font families in this Typekit project.
     * Needed to generate fallback @font-face declarations since Typekit
     * only provides a project ID, not individual family metadata.
     */
    families?: (string | TypeKitFontFamily)[];
}
export {};