import dotenv from 'dotenv';
import * as fs from 'fs';
import * as path from 'path';

// Load environment variables from .env file
dotenv.config();

export interface AppConfig {
  port: number;
  apiKey: string;
  databasePath: string;
  relayUrls: string[];
  autoRestart: boolean;
  maxRestarts: number;
  logLevel: string;
}

function parseConfigFile(): Partial<AppConfig> {
  try {
    // Try to read the TOML config file
    const configPath = '/usr/local/bin/sdk_signer.conf';
    if (fs.existsSync(configPath)) {
      const configContent = fs.readFileSync(configPath, 'utf8');
      
      // Simple TOML parsing for our needs
      const relayUrlsMatch = configContent.match(/relay_urls\s*=\s*\[(.*?)\]/);
      const wsPortMatch = configContent.match(/ws_port\s*=\s*(\d+)/);
      const httpPortMatch = configContent.match(/http_port\s*=\s*(\d+)/);
      
      const config: Partial<AppConfig> = {};
      
      if (relayUrlsMatch) {
        // Parse relay URLs from the array format
        const urlsStr = relayUrlsMatch[1];
        const urls = urlsStr.split(',').map(url => 
          url.trim().replace(/"/g, '').replace(/http:\/\//, 'ws://')
        );
        config.relayUrls = urls;
      }
      
      if (wsPortMatch) {
        config.port = parseInt(wsPortMatch[1]);
      }
      
      return config;
    }
  } catch (error) {
    console.warn('⚠️  Warning: Could not read config file, using defaults:', error);
  }
  
  return {};
}

export function loadConfig(): AppConfig {
  const fileConfig = parseConfigFile();
  
  return {
    port: fileConfig.port || parseInt(process.env.PORT || '9090'),
    apiKey: process.env.API_KEY || 'your-api-key-change-this',
    databasePath: process.env.DATABASE_PATH || './data/server.db',
    relayUrls: fileConfig.relayUrls || process.env.RELAY_URLS?.split(',') || ['ws://localhost:8090'],
    autoRestart: process.env.AUTO_RESTART === 'true',
    maxRestarts: parseInt(process.env.MAX_RESTARTS || '10'),
    logLevel: process.env.LOG_LEVEL || 'info'
  };
}

export const config: AppConfig = loadConfig();

// Validate required environment variables
if (!config.apiKey || config.apiKey === 'your-api-key-change-this') {
  console.warn('⚠️  Warning: Using default API key. Set API_KEY environment variable for production.');
}