import DOMPurify from 'isomorphic-dompurify';

/**
 * Sanitizes chapter HTML content with extended allowed tags.
 * More permissive than the description sanitizer to support
 * formatted novel content including headings, lists, and images.
 */
export function sanitizeChapterHtml(html: string): string {
	return DOMPurify.sanitize(html, {
		ALLOWED_TAGS: [
			// Basic formatting
			'b',
			'i',
			'em',
			'strong',
			'u',
			's',
			'strike',
			'del',
			'ins',
			// Structure
			'p',
			'br',
			'hr',
			'div',
			'span',
			// Headings
			'h1',
			'h2',
			'h3',
			'h4',
			'h5',
			'h6',
			// Lists
			'ul',
			'ol',
			'li',
			// Quotes
			'blockquote',
			'q',
			'cite',
			// Preformatted
			'pre',
			'code',
			// Ruby (for Asian language annotations)
			'ruby',
			'rt',
			'rp',
			// Images
			'img',
			// Tables
			'table',
			'thead',
			'tbody',
			'tr',
			'th',
			'td'
		],
		ALLOWED_ATTR: [
			// Image attributes
			'src',
			'alt',
			'title',
			'width',
			'height',
			// Table attributes
			'colspan',
			'rowspan',
			// Generic styling (limited)
			'class'
		],
		ALLOW_DATA_ATTR: false
	});
}