/**
 * Desmos Calculator Provider
 * Implementation of CalculatorProvider for Desmos calculators
 *
 * Supports: Basic, Scientific, and Graphing calculators
 * Based on Desmos API v1.12+
 * Requires: Desmos API key (obtain from https://www.desmos.com/api)
 *
 * SECURITY BEST PRACTICE:
 * - Development: Pass apiKey directly for local testing
 * - Production: Use proxyEndpoint to keep API key server-side
 *
 * Example server-side proxy (Express.js):
 * ```
 * app.get('/api/desmos/token', requireAuth, (req, res) => {
 *   res.json({ apiKey: process.env.DESMOS_API_KEY });
 * });
 * ```
 */
import type { Calculator, CalculatorProvider, CalculatorProviderCapabilities, CalculatorProviderConfig, CalculatorType } from "@pie-players/pie-calculator";
declare global {
    interface Window {
        Desmos?: any;
    }
}
/**
 * Desmos Calculator Provider Implementation
 */
export declare class DesmosCalculatorProvider implements CalculatorProvider {
    readonly providerId = "desmos";
    readonly providerName = "Desmos";
    readonly supportedTypes: CalculatorType[];
    readonly version = "1.12";
    private initialized;
    private apiKey?;
    private proxyEndpoint?;
    private isDevelopment;
    private onTelemetry;
    private emitTelemetry;
    /**
     * Get the configured API key
     * @internal Used internally by calculator instances
     */
    getApiKey(): string | undefined;
    /**
     * Dynamically load the Desmos calculator library
     * @private
     */
    private loadDesmosScript;
    /**
     * Initialize Desmos library
     * @param config Configuration with API key (development) or proxy endpoint (production)
     */
    initialize(config?: {
        apiKey?: string;
        proxyEndpoint?: string;
        onTelemetry?: (eventName: string, payload?: Record<string, unknown>) => void | Promise<void>;
    }): Promise<void>;
    /**
     * Create a calculator instance
     */
    createCalculator(type: CalculatorType, container: HTMLElement, config?: CalculatorProviderConfig): Promise<Calculator>;
    /**
     * Check if type is supported
     */
    supportsType(type: CalculatorType): boolean;
    /**
     * Cleanup
     */
    destroy(): void;
    /**
     * Get provider capabilities
     */
    getCapabilities(): CalculatorProviderCapabilities;
}