/**
 * HTML Evaluator - Browser-based HTML/JavaScript evaluation
 *
 * Uses Playwright for real browser rendering, screenshot capture,
 * and console error detection.
 */
import { BaseEvaluator, EvaluationResult } from '../base-evaluator';
export interface HTMLEvaluationResult extends EvaluationResult {
    details: {
        renders: boolean;
        errors: string[];
        warnings: string[];
        screenshot?: string;
        render_time_ms: number;
        has_doctype: boolean;
        has_required_tags: boolean;
        structure_issues: string[];
        [key: string]: unknown;
    };
}
/**
 * HTML/JavaScript evaluator using Playwright for browser testing.
 *
 * Scoring:
 * - Renders successfully: 50 points
 * - No console errors: 30 points
 * - Fast render (<3s): 20 points
 */
export declare class HTMLEvaluator extends BaseEvaluator {
    private headless;
    private outputDir;
    private playwrightAvailable;
    private playwright;
    constructor(headless?: boolean, outputDir?: string);
    private checkPlaywright;
    getLanguage(): string;
    getFileExtension(): string;
    /**
     * Extract HTML code from response (handles markdown code blocks).
     */
    private extractHTML;
    /**
     * Validate HTML structure statically.
     */
    private validateStructure;
    /**
     * Evaluate HTML using browser (if Playwright available) or static validation.
     */
    evaluate(code: string, testName: string, _prompt: string, _expected?: string): Promise<HTMLEvaluationResult>;
    /**
     * Evaluate HTML in a real browser using Playwright.
     */
    private evaluateInBrowser;
}
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