#!/usr/bin/env tsx

/**
 * Example client demonstrating how to interact with the Educational AI Agents
 *
 * Usage:
 * npm run example
 *
 * or directly:
 * npx tsx src/example-client.ts
 */

const API_BASE = 'http://localhost:3000';

async function makeRequest(endpoint: string, options: RequestInit = {}) {
  const response = await fetch(`${API_BASE}${endpoint}`, {
    headers: {
      'Content-Type': 'application/json',
      ...options.headers,
    },
    ...options,
  });

  if (!response.ok) {
    throw new Error(`HTTP ${response.status}: ${await response.text()}`);
  }

  return response.json();
}

async function chatWithAgent(message: string, conversationId = 'demo') {
  console.log(`🧑 User: ${message}`);

  const result = await makeRequest('/api/agent/chat', {
    method: 'POST',
    body: JSON.stringify({ message, conversationId }),
  });

  console.log(`🤖 Agent: ${result.response}`);
  console.log('');
  return result;
}

async function listTools() {
  const result = await makeRequest('/api/agent/tools');
  console.log('🔧 Available Tools:');
  result.tools.forEach((tool: any) => {
    console.log(`  - ${tool.name}: ${tool.description}`);
  });
  console.log('');
}

async function getHistory(conversationId = 'demo') {
  const result = await makeRequest(`/api/agent/history/${conversationId}`);
  console.log(`📜 Conversation History (${result.messageCount} messages):`);
  result.history.forEach((msg: any, index: number) => {
    const icon = msg.role === 'user' ? '🧑' : '🤖';
    console.log(`  ${index + 1}. ${icon} ${msg.role}: ${msg.content.substring(0, 100)}${msg.content.length > 100 ? '...' : ''}`);
  });
  console.log('');
}

async function runDemo() {
  console.log('🎓 Educational AI Agents Demo Starting...\n');

  try {
    // Check server health
    const health = await makeRequest('/health');
    console.log('✅ Server is healthy:', health.status);
    console.log('');

    // List available tools
    await listTools();

    const conversationId = `demo-${Date.now()}`;

    // Demo conversation showcasing educational capabilities
    console.log('=== Educational Demo Conversation ===\n');

    // Basic greeting
    await chatWithAgent('Hello! I need help with my studies.', conversationId);

    // Math help demo
    await chatWithAgent('Can you help me solve this equation: 2x + 5 = 13?', conversationId);

    // Calculator tool demo for learning
    await chatWithAgent('Let me check: what is 15 * 7 + 23?', conversationId);

    // Note taking demo for learning
    await chatWithAgent('Please save a note: "Quadratic formula: x = (-b ± √(b²-4ac)) / 2a"', conversationId);

    // Learning question
    await chatWithAgent('Can you explain how to approach word problems in algebra?', conversationId);

    // Study summary
    await chatWithAgent('Thanks for helping me learn! Can you summarize what we covered today?', conversationId);

    // Show conversation history
    await getHistory(conversationId);

    console.log('✅ Demo completed successfully!');

  } catch (error) {
    console.error('❌ Demo failed:', error);
    console.log('\nMake sure the server is running with: npm run dev');
  }
}

// Interactive mode function
async function interactiveMode() {
  console.log('🎮 Interactive Mode - Type "exit" to quit, "help" for commands\n');

  const conversationId = `interactive-${Date.now()}`;

  // Simple readline interface for Node.js
  const readline = require('readline');
  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
  });

  const question = (prompt: string): Promise<string> => {
    return new Promise((resolve) => {
      rl.question(prompt, resolve);
    });
  };

  try {
    while (true) {
      const input = await question('🧑 You: ');

      if (input.toLowerCase() === 'exit') {
        console.log('👋 Goodbye!');
        break;
      }

      if (input.toLowerCase() === 'help') {
        console.log('💡 Commands:');
        console.log('  - Type any educational question to chat with the agent');
        console.log('  - "tools" - List available learning tools');
        console.log('  - "history" - Show conversation history');
        console.log('  - "clear" - Clear conversation');
        console.log('  - "exit" - Quit interactive mode');
        console.log('');
        continue;
      }

      if (input.toLowerCase() === 'tools') {
        await listTools();
        continue;
      }

      if (input.toLowerCase() === 'history') {
        await getHistory(conversationId);
        continue;
      }

      if (input.toLowerCase() === 'clear') {
        await makeRequest(`/api/agent/history/${conversationId}`, { method: 'DELETE' });
        console.log('🗑️  Conversation cleared\n');
        continue;
      }

      if (input.trim()) {
        await chatWithAgent(input, conversationId);
      }
    }
  } catch (error) {
    console.error('❌ Interactive mode error:', error);
  } finally {
    rl.close();
  }
}

// Main execution
async function main() {
  const args = process.argv.slice(2);

  if (args.includes('--interactive') || args.includes('-i')) {
    await interactiveMode();
  } else {
    await runDemo();
  }
}

// Run if this file is executed directly
if (require.main === module) {
  main().catch(console.error);
}

export { chatWithAgent, listTools, getHistory, runDemo, interactiveMode };