#!/usr/bin/env node
/**
 * Command-line API evolution checker
 * This script runs the API evolution detection system from the command line
 * and provides detailed output about missing or changed endpoints.
 */

const fs = require('fs');
const path = require('path');

// Simple implementation of the evolution checker for Node.js
class CommandLineEvolutionChecker {
  constructor() {
    this.schemaPath = path.join(__dirname, 'openapi-schema.json');
    this.implementedEndpoints = new Set([
      'GET:/ai-voicebot/api/admin/names',
      'POST:/ai-voicebot/api/admin/set_password',
      'POST:/ai-voicebot/api/admin/clear_password',
      'GET:/ai-voicebot/api/health',
      'GET:/ai-voicebot/api/session',
      'GET:/ai-voicebot/api/lobby',
      'POST:/ai-voicebot/api/lobby/{session_id}'
    ]);
  }

  loadSchema() {
    try {
      if (!fs.existsSync(this.schemaPath)) {
        throw new Error(`Schema file not found at: ${this.schemaPath}`);
      }
      
      const schemaContent = fs.readFileSync(this.schemaPath, 'utf8');
      return JSON.parse(schemaContent);
    } catch (error) {
      throw new Error(`Failed to load OpenAPI schema: ${error.message}`);
    }
  }

  extractEndpoints(schema) {
    const endpoints = [];
    
    if (!schema.paths) {
      throw new Error('No paths found in OpenAPI schema');
    }

    Object.keys(schema.paths).forEach(path => {
      // Skip the generic proxy endpoint
      if (path === '/ai-voicebot/{path}') {
        return;
      }

      const pathObj = schema.paths[path];
      Object.keys(pathObj).forEach(method => {
        const operation = pathObj[method];
        const endpointKey = `${method.toUpperCase()}:${path}`;
        
        endpoints.push({
          path,
          method: method.toUpperCase(),
          operationId: operation.operationId,
          summary: operation.summary,
          implemented: this.implementedEndpoints.has(endpointKey),
          endpointKey
        });
      });
    });

    return endpoints;
  }

  generateMethodName(endpoint) {
    if (endpoint.operationId) {
      // Convert snake_case operation ID to camelCase
      return endpoint.operationId.replace(/_([a-z])/g, (match, letter) => letter.toUpperCase());
    }
    
    // Fallback: generate from path and method
    const pathParts = endpoint.path.split('/').filter(part => part && !part.startsWith('{'));
    const lastPart = pathParts[pathParts.length - 1] || 'endpoint';
    const method = endpoint.method.toLowerCase();
    
    if (method === 'get') {
      return `get${lastPart.charAt(0).toUpperCase() + lastPart.slice(1)}`;
    } else {
      return `${method}${lastPart.charAt(0).toUpperCase() + lastPart.slice(1)}`;
    }
  }

  generateImplementationStub(endpoint) {
    const methodName = this.generateMethodName(endpoint);
    const hasPathParams = endpoint.path.includes('{');
    const needsBody = ['POST', 'PUT', 'PATCH'].includes(endpoint.method);
    
    let params = [];
    let requestOptions = `{ method: '${endpoint.method}'`;
    
    // Add path parameters
    if (hasPathParams) {
      const pathParams = endpoint.path.match(/\{([^}]+)\}/g) || [];
      pathParams.forEach(param => {
        const paramName = param.replace(/[{}]/g, '');
        params.push(`${paramName}: string`);
      });
    }
    
    // Add body parameter for methods that typically need one
    if (needsBody) {
      params.push('data?: any');
      requestOptions += ', body: data';
    }
    
    requestOptions += ' }';
    
    const paramString = params.length > 0 ? params.join(', ') : '';
    
    return `  async ${methodName}(${paramString}): Promise<any> {
    return this.request<any>('${endpoint.path}', ${requestOptions});
  }`;
  }

  async runCheck() {
    console.log('🔍 API Evolution Check');
    console.log('='.repeat(50));
    
    try {
      const schema = this.loadSchema();
      const endpoints = this.extractEndpoints(schema);
      
      const implemented = endpoints.filter(ep => ep.implemented);
      const unimplemented = endpoints.filter(ep => !ep.implemented);
      
      console.log(`📊 Summary:`);
      console.log(`   Total endpoints: ${endpoints.length}`);
      console.log(`   Implemented: ${implemented.length}`);
      console.log(`   Unimplemented: ${unimplemented.length}`);
      console.log('');
      
      if (unimplemented.length === 0) {
        console.log('✅ All API endpoints are implemented in ApiClient!');
        return;
      }
      
      console.log('⚠️  Unimplemented API endpoints:');
      unimplemented.forEach(endpoint => {
        console.log(`   • ${endpoint.method} ${endpoint.path}`);
        if (endpoint.summary) {
          console.log(`     ${endpoint.summary}`);
        }
      });
      
      console.log('');
      console.log('💡 Implementation suggestions:');
      console.log('Add these methods to the ApiClient class:');
      console.log('');
      
      unimplemented.forEach(endpoint => {
        console.log(this.generateImplementationStub(endpoint));
        console.log('');
      });
      
      console.log('📝 Next steps:');
      console.log('1. Copy the suggested methods above into client/src/api-client.ts');
      console.log('2. Update the implementedEndpoints Set in api-evolution-checker.ts');
      console.log('3. Add convenience methods to the appropriate API namespaces');
      console.log('4. Update type imports if needed');
      
    } catch (error) {
      console.error('❌ Error during API evolution check:', error.message);
      process.exit(1);
    }
  }
}

// Run the check if this script is executed directly
if (require.main === module) {
  const checker = new CommandLineEvolutionChecker();
  checker.runCheck();
}

module.exports = { CommandLineEvolutionChecker };