/**
 * DeepSeek LLM Provider
 *
 * Provider for DeepSeek API (https://api.deepseek.com).
 * DeepSeek offers GPT-4 level performance at 95% lower cost.
 *
 * Environment variables:
 * - DEEPSEEK_API_KEY: Required API key
 * - DEEPSEEK_BASE_URL: Optional base URL (default: https://api.deepseek.com/v1)
 * - DEEPSEEK_MODEL: Model to use (default: deepseek-chat)
 *
 * Pricing (as of 2025):
 * - deepseek-chat: $0.14/M input tokens, $0.28/M output tokens
 * - deepseek-coder: $0.14/M input tokens, $0.28/M output tokens
 *
 * Compared to GPT-4:
 * - GPT-4: ~$30/M input, ~$60/M output
 * - Savings: ~99.5% cheaper
 */
import type { LLMProvider, GenerationRequest, GenerationResponse } from './index.js';
export interface DeepSeekConfig {
    apiKey?: string;
    baseURL?: string;
    model?: string;
    timeout?: number;
}
/**
 * DeepSeek provider for cost-effective AI inference
 *
 * DeepSeek V3 matches GPT-4 performance at a fraction of the cost.
 * Perfect for test generation, code analysis, and quality assurance tasks.
 */
export declare class DeepSeekProvider implements LLMProvider {
    name: string;
    models: string[];
    private readonly apiKey;
    private readonly baseURL;
    private readonly defaultModel;
    private readonly timeout;
    constructor(config?: DeepSeekConfig);
    isAvailable(): Promise<boolean>;
    generate(request: GenerationRequest): Promise<GenerationResponse>;
    stream(request: GenerationRequest): AsyncIterable<string>;
    countTokens(text: string): number;
    private buildMessages;
    /**
     * Get cost estimate for a generation
     * DeepSeek pricing: $0.14/M input, $0.28/M output
     */
    estimateCost(inputTokens: number, outputTokens: number): number;
    /**
     * Compare cost to GPT-4
     * GPT-4: ~$30/M input, ~$60/M output
     */
    compareGPT4(inputTokens: number, outputTokens: number): {
        deepseekCost: number;
        gpt4Cost: number;
        savings: number;
        savingsPercent: number;
    };
}
/**
 * DeepSeek-specific error
 */
export declare class DeepSeekError extends Error {
    code: string;
    details?: Record<string, unknown>;
    constructor(message: string, details?: Record<string, unknown>);
}
/**
 * Create DeepSeek provider with default settings
 */
export declare function createDeepSeekProvider(config?: DeepSeekConfig): DeepSeekProvider;
/**
 * Check if DeepSeek is available and configured
 */
export declare function checkDeepSeekSetup(): Promise<boolean>;
/**
 * Get DeepSeek API key setup instructions
 */
export declare function getDeepSeekSetupInstructions(): string;