import { OpenAI } from '@ahoo-wang/fetcher-openai';

// Initialize the client with your API key
const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!, // Your OpenAI API key
});

// Create a simple chat completion
const response = await openai.chat.completions({
  model: 'gpt-3.5-turbo',
  messages: [
    { role: 'system', content: 'You are a helpful assistant.' },
    { role: 'user', content: 'Hello, how are you?' },
  ],
  temperature: 0.7,
  max_tokens: 150,
});

console.log(response.choices[0].message.content);
// Output: "Hello! I'm doing well, thank you for asking. How can I help you today?"

import { config } from 'dotenv';
config(); // Load environment variables

const openai = new OpenAI({
  baseURL: process.env.OPENAI_BASE_URL!,
  apiKey: process.env.OPENAI_API_KEY!,
});

import { OpenAI } from '@ahoo-wang/fetcher-openai';

const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!,
});

// Create a streaming chat completion
const stream = await openai.chat.completions({
  model: 'gpt-4', // Use GPT-4 for better quality
  messages: [
    { role: 'system', content: 'You are a creative storyteller.' },
    {
      role: 'user',
      content: 'Tell me a short story about a robot learning to paint',
    },
  ],
  stream: true,
  temperature: 0.8, // Higher creativity
  max_tokens: 1000,
});

// Process the streaming response in real-time
let fullResponse = '';
for await (const chunk of stream) {
  const content = chunk.choices[0]?.delta?.content || '';
  if (content) {
    process.stdout.write(content); // Real-time output
    fullResponse += content;
  }
}

console.log('\n\n--- Stream Complete ---');
console.log('Total characters:', fullResponse.length);

import { OpenAI } from '@ahoo-wang/fetcher-openai';

const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!,
});

const stream = await openai.chat.completions({
  model: 'gpt-3.5-turbo',
  messages: [{ role: 'user', content: 'Write a haiku about programming' }],
  stream: true,
});

// Track streaming progress
let chunksReceived = 0;
let totalContent = '';

for await (const chunk of stream) {
  chunksReceived++;
  const content = chunk.choices[0]?.delta?.content || '';

  if (content) {
    totalContent += content;
    // Show progress every 5 chunks
    if (chunksReceived % 5 === 0) {
      console.log(
        `Received ${chunksReceived} chunks, ${totalContent.length} chars`,
      );
    }
  }

  // Check for completion
  if (chunk.choices[0]?.finish_reason) {
    console.log(`Stream finished: ${chunk.choices[0].finish_reason}`);
    break;
  }
}

console.log('Final content:', totalContent);

new OpenAI(options: OpenAIOptions)

const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: 'sk-your-api-key-here',
});

interface ChatRequest {
  // Core parameters
  model?: string; // Model ID (e.g., 'gpt-3.5-turbo', 'gpt-4')
  messages: Message[]; // Conversation messages
  stream?: boolean; // Enable streaming responses

  // Generation parameters
  temperature?: number; // Sampling temperature (0.0 - 2.0)
  max_tokens?: number; // Maximum tokens to generate
  top_p?: number; // Nucleus sampling parameter (0.0 - 1.0)

  // Penalty parameters
  frequency_penalty?: number; // Repetition penalty (-2.0 - 2.0)
  presence_penalty?: number; // Topic diversity penalty (-2.0 - 2.0)

  // Advanced parameters
  n?: number; // Number of completions to generate
  stop?: string | string[]; // Stop sequences
  logit_bias?: Record<string, number>; // Token bias adjustments
  user?: string; // End-user identifier

  // Response format
  response_format?: object; // Response format specification

  // Function/Tool calling
  // tools should be an array of tool objects: { type: "function", function: { name: string, description?: string, parameters?: object } }[]
  // Note: The type definition uses string[] but OpenAI expects tool objects
  tools?: string[];
  // tool_choice supports: "auto", "none", or { type: "function", function: { name: string } }
  tool_choice?: { [key: string]: any };
  // Non-standard parameter (not part of OpenAI API) - likely for internal tracking
  seen?: number;

  // Other OpenAI parameters
  [key: string]: any;
}

interface Message {
  role: 'system' | 'user' | 'assistant' | 'tool';
  content?: string;
  name?: string; // For tool messages
  tool_call_id?: string; // ID of the tool call (for tool role messages)
  tool_calls?: Array<{
    id: string;
    type: 'function';
    function: { name: string; arguments: string };
  }>; // For assistant messages with tool calls
}

interface ChatResponse {
  id: string; // Unique response identifier
  object: string; // Object type (usually 'chat.completion')
  created: number; // Unix timestamp of creation
  model: string; // Model used for completion
  choices: Choice[]; // Array of completion choices
  usage: Usage; // Token usage statistics
}

interface Choice {
  index: number; // Choice index (0-based)
  message: Message; // The completion message
  finish_reason: string; // Reason completion stopped
}

interface Usage {
  prompt_tokens: number; // Tokens in the prompt
  completion_tokens: number; // Tokens in the completion
  total_tokens: number; // Total tokens used
}

import { config } from 'dotenv';
config();

const openai = new OpenAI({
  baseURL: process.env.OPENAI_BASE_URL!,
  apiKey: process.env.OPENAI_API_KEY!,
});

// Using Azure OpenAI
const openai = new OpenAI({
  baseURL:
    'https://your-resource.openai.azure.com/openai/deployments/your-deployment',
  apiKey: 'your-azure-api-key',
});

// Using a proxy service
const openai = new OpenAI({
  baseURL: 'https://your-proxy-service.com/api/openai',
  apiKey: 'your-proxy-api-key',
});

// Using a local OpenAI-compatible server
const openai = new OpenAI({
  baseURL: 'http://localhost:8000/v1',
  apiKey: 'not-needed-for-local',
});

import { Fetcher } from '@ahoo-wang/fetcher';

const customFetcher = new Fetcher({
  baseURL: 'https://api.openai.com/v1',
  headers: {
    Authorization: `Bearer ${process.env.OPENAI_API_KEY}`,
    'Custom-Header': 'value',
  },
  timeout: 30000, // 30 second timeout
  retry: {
    attempts: 3,
    delay: 1000,
  },
});

const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!,
});

// Replace the default fetcher
openai.fetcher = customFetcher;

import { Fetcher } from '@ahoo-wang/fetcher';

// Add request logging
const loggingFetcher = new Fetcher({
  baseURL: 'https://api.openai.com/v1',
  headers: {
    Authorization: `Bearer ${process.env.OPENAI_API_KEY}`,
  },
  interceptors: [
    {
      request: config => {
        console.log('Making request to:', config.url);
        return config;
      },
      response: response => {
        console.log('Response status:', response.status);
        return response;
      },
    },
  ],
});

const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!,
});

openai.fetcher = loggingFetcher;

import { OpenAI } from '@ahoo-wang/fetcher-openai';

const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!,
});

try {
  const response = await openai.chat.completions({
    model: 'gpt-3.5-turbo',
    messages: [{ role: 'user', content: 'Hello, world!' }],
  });

  console.log('Success:', response.choices[0].message.content);
} catch (error) {
  console.error('OpenAI API Error:', error.message);
  console.error('Error details:', error);
}

try {
  const response = await openai.chat.completions({
    model: 'gpt-3.5-turbo',
    messages: [{ role: 'user', content: 'Hello!' }],
  });
} catch (error: any) {
  // Handle different error types
  if (error.response) {
    // API returned an error response
    const status = error.response.status;
    const data = error.response.data;

    switch (status) {
      case 401:
        console.error('Authentication failed - check your API key');
        break;
      case 429:
        console.error('Rate limit exceeded - implement backoff strategy');
        console.log('Retry after:', data.retry_after, 'seconds');
        break;
      case 400:
        console.error('Bad request - check your parameters');
        console.log('Error details:', data.error);
        break;
      case 500:
      case 502:
      case 503:
        console.error('OpenAI server error - retry with exponential backoff');
        break;
      default:
        console.error(`Unexpected error (${status}):`, data.error?.message);
    }
  } else if (error.request) {
    // Network error
    console.error('Network error - check your internet connection');
    console.error('Request details:', error.request);
  } else {
    // Other error
    console.error('Unexpected error:', error.message);
  }
}

try {
  const stream = await openai.chat.completions({
    model: 'gpt-3.5-turbo',
    messages: [{ role: 'user', content: 'Tell me a story' }],
    stream: true,
  });

  for await (const chunk of stream) {
    const content = chunk.choices[0]?.delta?.content;
    if (content) {
      process.stdout.write(content);
    }
  }
} catch (error) {
  if (error.name === 'EventStreamConvertError') {
    console.error('Streaming error - response may not be a valid event stream');
  } else {
    console.error('Streaming failed:', error.message);
  }
}

import { OpenAI } from '@ahoo-wang/fetcher-openai';

class ResilientOpenAI {
  private client: OpenAI;
  private maxRetries: number;
  private baseDelay: number;

  constructor(apiKey: string, maxRetries = 3, baseDelay = 1000) {
    this.client = new OpenAI({
      baseURL: 'https://api.openai.com/v1',
      apiKey,
    });
    this.maxRetries = maxRetries;
    this.baseDelay = baseDelay;
  }

  private async delay(ms: number): Promise<void> {
    return new Promise(resolve => setTimeout(resolve, ms));
  }

  async completions(request: any, attempt = 1): Promise<any> {
    try {
      return await this.client.chat.completions(request);
    } catch (error: any) {
      const isRetryable =
        error.response?.status >= 500 ||
        error.response?.status === 429 ||
        !error.response; // Network errors

      if (isRetryable && attempt <= this.maxRetries) {
        const delay = this.baseDelay * Math.pow(2, attempt - 1); // Exponential backoff
        console.log(`Attempt ${attempt} failed, retrying in ${delay}ms...`);
        await this.delay(delay);
        return this.completions(request, attempt + 1);
      }

      throw error;
    }
  }
}

// Usage
const resilientClient = new ResilientOpenAI(process.env.OPENAI_API_KEY!);

try {
  const response = await resilientClient.completions({
    model: 'gpt-3.5-turbo',
    messages: [{ role: 'user', content: 'Hello!' }],
  });
  console.log(response.choices[0].message.content);
} catch (error) {
  console.error('All retry attempts failed:', error.message);
}

import { Fetcher } from '@ahoo-wang/fetcher';

const customFetcher = new Fetcher({
  baseURL: 'https://api.openai.com/v1',
  headers: {
    Authorization: `Bearer ${process.env.OPENAI_API_KEY}`,
    'Custom-Header': 'value',
    'X-Custom-Client': 'my-app/1.0.0',
  },
  timeout: 30000, // 30 second timeout
  retry: {
    attempts: 3, // Retry failed requests
    delay: 1000, // Initial delay between retries
    backoff: 'exponential', // Exponential backoff strategy
  },
  interceptors: [
    {
      request: config => {
        console.log(`Making ${config.method} request to ${config.url}`);
        return config;
      },
      response: response => {
        console.log(`Response: ${response.status}`);
        return response;
      },
    },
  ],
});

const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!,
});

// Replace the default fetcher
openai.fetcher = customFetcher;

import { OpenAI } from '@ahoo-wang/fetcher-openai';

const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!,
});

// Define available tools (use 'function' type for OpenAI compatibility)
const tools = [
  {
    type: 'function',
    function: {
      name: 'get_weather',
      description: 'Get the current weather for a location',
      parameters: {
        type: 'object',
        properties: {
          location: {
            type: 'string',
            description: 'The city and state, e.g. San Francisco, CA',
          },
        },
        required: ['location'],
      },
    },
  },
];

// Make a request with tool calling
const response = await openai.chat.completions({
  model: 'gpt-4',
  messages: [
    { role: 'user', content: "What's the weather like in San Francisco?" },
  ],
  tools: tools,
  tool_choice: 'auto', // Let the model decide when to call tools
});

// Handle tool calls
if (response.choices[0].message.tool_calls) {
  const toolCall = response.choices[0].message.tool_calls[0];
  console.log('Tool called:', toolCall.function.name);
  console.log('Arguments:', JSON.parse(toolCall.function.arguments));
}

import { OpenAI } from '@ahoo-wang/fetcher-openai';

class ChatConversation {
  private client: OpenAI;
  private messages: Array<{ role: string; content: string }> = [];

  constructor(apiKey: string) {
    this.client = new OpenAI({
      baseURL: 'https://api.openai.com/v1',
      apiKey,
    });
  }

  async addMessage(role: 'system' | 'user' | 'assistant', content: string) {
    this.messages.push({ role, content });
  }

  async sendMessage(content: string, options: Partial<ChatRequest> = {}) {
    await this.addMessage('user', content);

    const response = await this.client.chat.completions({
      model: 'gpt-3.5-turbo',
      messages: this.messages,
      ...options,
    });

    const assistantMessage = response.choices[0].message;
    await this.addMessage('assistant', assistantMessage.content);

    return assistantMessage;
  }

  getHistory() {
    return [...this.messages];
  }

  clearHistory() {
    this.messages = [];
  }
}

// Usage
const conversation = new ChatConversation(process.env.OPENAI_API_KEY!);

// Set system prompt
await conversation.addMessage('system', 'You are a helpful coding assistant.');

// Have a conversation
const response1 = await conversation.sendMessage('How do I use TypeScript?');
console.log('Assistant:', response1.content);

const response2 = await conversation.sendMessage('Can you show me an example?');
console.log('Assistant:', response2.content);

import { OpenAI } from '@ahoo-wang/fetcher-openai';

const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!,
});

async function processBatch(prompts: string[], batchSize = 5) {
  const results = [];

  // Process in batches to avoid rate limits
  for (let i = 0; i < prompts.length; i += batchSize) {
    const batch = prompts.slice(i, i + batchSize);

    const batchPromises = batch.map(prompt =>
      openai.chat.completions({
        model: 'gpt-3.5-turbo',
        messages: [{ role: 'user', content: prompt }],
        temperature: 0.7,
      }),
    );

    try {
      const batchResults = await Promise.all(batchPromises);
      results.push(...batchResults);

      // Add delay between batches to respect rate limits
      if (i + batchSize < prompts.length) {
        await new Promise(resolve => setTimeout(resolve, 1000));
      }
    } catch (error) {
      console.error(`Batch ${Math.floor(i / batchSize) + 1} failed:`, error);
      // Continue with next batch or implement retry logic
    }
  }

  return results;
}

// Usage
const prompts = [
  'Explain quantum computing',
  'What is machine learning?',
  'How does blockchain work?',
  'Describe cloud computing',
];

const results = await processBatch(prompts);
results.forEach((result, index) => {
  console.log(`Prompt ${index + 1}:`, result.choices[0].message.content);
});

const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!,
});

// Add logging interceptor
openai.fetcher.interceptors.request.use(config => {
  console.log(`[${new Date().toISOString()}] ${config.method} ${config.url}`);
  return config;
});

openai.fetcher.interceptors.response.use(response => {
  console.log(`[${new Date().toISOString()}] Response: ${response.status}`);
  return response;
});

import { ResultExtractor } from '@ahoo-wang/fetcher';

// Create a custom extractor that adds metadata
const metadataExtractor: ResultExtractor = exchange => {
  const response = exchange.response;
  return {
    ...response,
    _metadata: {
      requestId: response.headers.get('x-request-id'),
      processingTime: Date.now() - exchange.startTime,
      model: response.model,
    },
  };
};

// Use with chat completions
const response = await openai.chat.completions(
  {
    model: 'gpt-3.5-turbo',
    messages: [{ role: 'user', content: 'Hello!' }],
  },
  {
    resultExtractor: metadataExtractor,
  },
);

// Enable request deduplication for identical requests
openai.fetcher.defaults.deduplicate = true;

// This will reuse the response from identical concurrent requests
const [response1, response2] = await Promise.all([
  openai.chat.completions({
    model: 'gpt-3.5-turbo',
    messages: [{ role: 'user', content: 'Hello!' }],
  }),
  openai.chat.completions({
    model: 'gpt-3.5-turbo',
    messages: [{ role: 'user', content: 'Hello!' }],
  }),
]);

// Before (OpenAI SDK)
import OpenAI from 'openai';

const openai = new OpenAI({
  apiKey: process.env.OPENAI_API_KEY,
});

const response = await openai.chat.completions.create({
  model: 'gpt-3.5-turbo',
  messages: [{ role: 'user', content: 'Hello!' }],
});

// After (Fetcher OpenAI)
import { OpenAI } from '@ahoo-wang/fetcher-openai';

const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!,
});

const response = await openai.chat.completions({
  model: 'gpt-3.5-turbo',
  messages: [{ role: 'user', content: 'Hello!' }],
});

// 1. Check your API key
const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!, // Make sure this is set
});

// 2. Verify API key format
if (!process.env.OPENAI_API_KEY?.startsWith('sk-')) {
  throw new Error('Invalid API key format');
}

// 1. Ensure stream parameter is set to true
const stream = await openai.chat.completions({
  model: 'gpt-3.5-turbo',
  messages: [{ role: 'user', content: 'Hello!' }],
  stream: true, // This is required for streaming
});

// 2. Handle the stream properly
for await (const chunk of stream) {
  const content = chunk.choices[0]?.delta?.content;
  if (content) {
    process.stdout.write(content); // Use process.stdout.write for real-time output
  }
}

// Implement exponential backoff
async function completionsWithRetry(request: any, maxRetries = 3) {
  for (let attempt = 1; attempt <= maxRetries; attempt++) {
    try {
      return await openai.chat.completions(request);
    } catch (error: any) {
      if (error.response?.status === 429 && attempt < maxRetries) {
        const delay = Math.pow(2, attempt) * 1000; // Exponential backoff
        await new Promise(resolve => setTimeout(resolve, delay));
        continue;
      }
      throw error;
    }
  }
}

// Configure timeout and retry
const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!,
});

// Set custom timeout
openai.fetcher.defaults.timeout = 60000; // 60 seconds

// Add retry logic
openai.fetcher.defaults.retry = {
  attempts: 3,
  delay: 1000,
  backoff: 'exponential',
};

// Enable request logging
openai.fetcher.interceptors.request.use(config => {
  console.log('Request:', {
    url: config.url,
    method: config.method,
    headers: config.headers,
    body: config.body,
  });
  return config;
});

openai.fetcher.interceptors.response.use(response => {
  console.log('Response:', {
    status: response.status,
    headers: response.headers,
    data: response.data,
  });
  return response;
});

// Only import what you need
import { OpenAI } from '@ahoo-wang/fetcher-openai';

// Avoid importing unused features
// ❌ Don't do this if you only need chat completions
// import * as OpenAI from '@ahoo-wang/fetcher-openai';

// Use HTTP/2 compatible clients for better performance
const openai = new OpenAI({
  baseURL: 'https://api.openai.com/v1',
  apiKey: process.env.OPENAI_API_KEY!,
});

// Configure connection pooling if using Node.js
process.env.NODE_OPTIONS = '--max-http-header-size=81920';

// Process streaming responses efficiently
const stream = await openai.chat.completions({
  model: 'gpt-3.5-turbo',
  messages: [{ role: 'user', content: 'Long response here...' }],
  stream: true,
  max_tokens: 1000, // Limit tokens for faster responses
});

// Use efficient streaming processing
let buffer = '';
for await (const chunk of stream) {
  const content = chunk.choices[0]?.delta?.content || '';
  buffer += content;

  // Process in chunks rather than character by character
  if (buffer.length >= 100) {
    processChunk(buffer);
    buffer = '';
  }
}

// Implement response caching for similar requests
class CachedOpenAI {
  private cache = new Map<string, any>();
  private client: OpenAI;

  constructor(apiKey: string) {
    this.client = new OpenAI({
      baseURL: 'https://api.openai.com/v1',
      apiKey,
    });
  }

  private getCacheKey(request: any): string {
    return JSON.stringify({
      model: request.model,
      messages: request.messages,
      temperature: request.temperature,
    });
  }

  async completions(request: any, useCache = true) {
    const cacheKey = this.getCacheKey(request);

    if (useCache && this.cache.has(cacheKey)) {
      return this.cache.get(cacheKey);
    }

    const response = await this.client.chat.completions(request);

    if (useCache) {
      this.cache.set(cacheKey, response);
    }

    return response;
  }
}