/**
 * Multi-provider example for Simple AI Provider
 * Demonstrates how to use both Claude and OpenAI providers
 */

import { 
  createClaudeProvider, 
  createOpenAIProvider,
  createProvider,
  ProviderRegistry,
  AIProviderError, 
  AIErrorType 
} from '../src/index.js';

async function multiProviderExample() {
  console.log('=== Multi-Provider AI Example ===\n');

  // Get API keys from environment
  const claudeApiKey = process.env.ANTHROPIC_API_KEY || 'your-claude-api-key';
  const openaiApiKey = process.env.OPENAI_API_KEY || 'your-openai-api-key';

  try {
    // Method 1: Using factory functions
    console.log('1. Creating providers using factory functions...');
    
    const claude = createClaudeProvider(claudeApiKey, {
      defaultModel: 'claude-3-5-haiku-20241022'
    });

    const openai = createOpenAIProvider(openaiApiKey, {
      defaultModel: 'gpt-3.5-turbo'
    });

    console.log('✓ Providers created\n');

    // Method 2: Using generic createProvider function
    console.log('2. Creating providers using generic factory...');
    
    const claude2 = createProvider('claude', {
      apiKey: claudeApiKey,
      defaultModel: 'claude-3-5-haiku-20241022'
    });

    const openai2 = createProvider('openai', {
      apiKey: openaiApiKey,
      defaultModel: 'gpt-3.5-turbo'
    });

    console.log('✓ Generic providers created\n');

    // Method 3: Using Provider Registry
    console.log('3. Using Provider Registry...');
    console.log('Registered providers:', ProviderRegistry.getRegisteredProviders());
    
    const claudeFromRegistry = ProviderRegistry.create('claude', {
      apiKey: claudeApiKey,
      defaultModel: 'claude-3-5-haiku-20241022'
    });

    console.log('✓ Provider created from registry\n');

    // Initialize providers
    console.log('4. Initializing providers...');
    await Promise.all([
      claude.initialize(),
      openai.initialize()
    ]);
    console.log('✓ All providers initialized\n');

    // Compare provider information
    console.log('5. Provider Information:');
    console.log('Claude Info:', claude.getInfo());
    console.log('OpenAI Info:', openai.getInfo());
    console.log();

    // Test the same prompt with both providers
    const testPrompt = 'Explain the concept of recursion in programming in one sentence.';
    
    console.log('6. Testing same prompt with both providers...');
    console.log(`Prompt: "${testPrompt}"\n`);

    // Claude response
    console.log('--- Claude Response ---');
    const claudeResponse = await claude.complete({
      messages: [
        { role: 'system', content: 'You are a concise programming tutor.' },
        { role: 'user', content: testPrompt }
      ],
      maxTokens: 100,
      temperature: 0.7
    });

    console.log('Response:', claudeResponse.content);
    console.log('Usage:', claudeResponse.usage);
    console.log('Model:', claudeResponse.model);
    console.log();

    // OpenAI response
    console.log('--- OpenAI Response ---');
    const openaiResponse = await openai.complete({
      messages: [
        { role: 'system', content: 'You are a concise programming tutor.' },
        { role: 'user', content: testPrompt }
      ],
      maxTokens: 100,
      temperature: 0.7
    });

    console.log('Response:', openaiResponse.content);
    console.log('Usage:', openaiResponse.usage);
    console.log('Model:', openaiResponse.model);
    console.log();

    // Streaming comparison
    console.log('7. Streaming comparison...');
    console.log('Streaming from Claude:');
    
    for await (const chunk of claude.stream({
      messages: [{ role: 'user', content: 'Count from 1 to 5.' }],
      maxTokens: 50
    })) {
      if (!chunk.isComplete) {
        process.stdout.write(chunk.content);
      } else {
        console.log('\n✓ Claude streaming complete\n');
      }
    }

    console.log('Streaming from OpenAI:');
    
    for await (const chunk of openai.stream({
      messages: [{ role: 'user', content: 'Count from 1 to 5.' }],
      maxTokens: 50
    })) {
      if (!chunk.isComplete) {
        process.stdout.write(chunk.content);
      } else {
        console.log('\n✓ OpenAI streaming complete\n');
      }
    }

    // Provider-specific features demo
    console.log('8. Provider-specific features...');
    
    // OpenAI with organization
    const openaiWithOrg = createOpenAIProvider(openaiApiKey, {
      defaultModel: 'gpt-3.5-turbo',
      organization: 'org-example',
      timeout: 60000
    });
    console.log('✓ Created OpenAI provider with organization settings');

    // Claude with custom version
    const claudeCustom = createClaudeProvider(claudeApiKey, {
      defaultModel: 'claude-3-5-sonnet-20241022',
      version: '2023-06-01',
      maxRetries: 5
    });
    console.log('✓ Created Claude provider with custom settings');

    console.log('\n🎉 Multi-provider example completed successfully!');

  } catch (error) {
    console.error('❌ Error in multi-provider example:');
    
    if (error instanceof AIProviderError) {
      console.error(`AI Provider Error (${error.type}):`, error.message);
      
      switch (error.type) {
        case AIErrorType.AUTHENTICATION:
          console.error('💡 Hint: Check your API keys in environment variables');
          console.error('   Set ANTHROPIC_API_KEY and OPENAI_API_KEY');
          break;
        case AIErrorType.RATE_LIMIT:
          console.error('💡 Hint: You are being rate limited. Wait and try again.');
          break;
        case AIErrorType.INVALID_REQUEST:
          console.error('💡 Hint: Check your request parameters.');
          break;
        default:
          console.error('💡 Hint: An unexpected error occurred.');
      }
    } else {
      console.error('Unexpected error:', error);
    }
  }
}

// Provider comparison utility
async function compareProviders() {
  console.log('\n=== Provider Comparison ===');
  
  const providers = [
    { name: 'Claude', factory: () => createClaudeProvider('dummy-key') },
    { name: 'OpenAI', factory: () => createOpenAIProvider('dummy-key') }
  ];

  console.log('\nProvider Capabilities:');
  console.log('| Provider | Models | Context | Streaming | Vision | Functions |');
  console.log('|----------|--------|---------|-----------|--------|-----------|');

  for (const { name, factory } of providers) {
    const provider = factory();
    const info = provider.getInfo();
    
    console.log(`| ${name.padEnd(8)} | ${info.models.length.toString().padEnd(6)} | ${info.maxContextLength.toLocaleString().padEnd(7)} | ${info.supportsStreaming ? '✓' : '✗'.padEnd(9)} | ${info.capabilities?.vision ? '✓' : '✗'.padEnd(6)} | ${info.capabilities?.functionCalling ? '✓' : '✗'.padEnd(9)} |`);
  }
  
  console.log();
}

// Run the examples
if (import.meta.main) {
  await multiProviderExample();
  await compareProviders();
}