/**
 * Accessibility preferences state. Each option maps to a data-attribute on
 * <html> (e.g. data-a11y-contrast="high"); the PROJECT's CSS reacts to those
 * attributes. The plugin sets the attributes and persists the choice — it does
 * NOT ship styles, so it never fights the project's design.
 */ export const A11Y_DEFAULT = {
    bigCursor: false,
    contrast: 'default',
    grayscale: false,
    lineHeight: 0,
    readableFont: false,
    reduceMotion: false,
    textSize: 0,
    underlineLinks: false
};
export const A11Y_COOKIE = 'a11y-prefs';
export const A11Y_COOKIE_MAX_AGE = 60 * 60 * 24 * 365 // 1 year
;
/** Serialize for the cookie (compact). */ export function serializeA11y(state) {
    return JSON.stringify(state);
}
/** Parse from the cookie; falls back to defaults on any bad value. */ export function parseA11y(raw) {
    if (!raw) {
        return A11Y_DEFAULT;
    }
    try {
        const parsed = JSON.parse(raw);
        return {
            ...A11Y_DEFAULT,
            ...parsed
        };
    } catch  {
        return A11Y_DEFAULT;
    }
}
/**
 * Maps state → data-attributes to set on <html>. Returns { attr: value|null };
 * null means remove the attribute (option is at default). The project's CSS
 * targets these, e.g. `[data-a11y-contrast="high"] { … }`.
 */ export function a11yAttributes(state) {
    return {
        'data-a11y-contrast': state.contrast !== 'default' ? state.contrast : null,
        'data-a11y-cursor': state.bigCursor ? 'big' : null,
        'data-a11y-font': state.readableFont ? 'readable' : null,
        'data-a11y-grayscale': state.grayscale ? 'on' : null,
        'data-a11y-line': state.lineHeight > 0 ? String(state.lineHeight) : null,
        'data-a11y-motion': state.reduceMotion ? 'reduce' : null,
        'data-a11y-text': state.textSize > 0 ? String(state.textSize) : null,
        'data-a11y-underline': state.underlineLinks ? 'on' : null
    };
}

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