/**
 * Server Configuration
 * Central configuration for all backend constants and settings
 */

const path = require('path');

const config = {
  // Server Settings
  server: {
    port: process.env.PORT || 3000,
    host: process.env.HOST || '0.0.0.0', // Bind to all interfaces
    env: process.env.NODE_ENV || 'development'
  },

  // Database Settings
  database: {
    path: path.join(__dirname, '../database/datacenter.db'),
    // Enable WAL mode for better concurrency
    walMode: true,
    // Enable foreign keys
    foreignKeys: true,
    // Busy timeout in ms
    busyTimeout: 5000
  },

  // Rack Configuration
  rack: {
    // Default dimensions in pixels
    defaultWidth: 520,
    defaultHeight: 1485,
    // Number of U slots
    slots: 42,
    // Grid spacing
    gridHorizontal: 600,
    gridVertical: 1585
  },

  // Device Configuration
  device: {
    // Default device dimensions
    defaultHeight: 32,
    defaultSpacing: 2,
    // Margins within rack
    margin: {
      top: 10,
      right: 10,
      bottom: 10,
      left: 10
    },
    // Physical view width
    physicalWidth: 500,
    // Logical view width
    logicalWidth: 120
  },

  // Validation Rules
  validation: {
    project: {
      nameMinLength: 1,
      nameMaxLength: 100,
      descriptionMaxLength: 500
    },
    rack: {
      nameMinLength: 1,
      nameMaxLength: 50,
      maxPerProject: 1000
    },
    device: {
      nameMinLength: 1,
      nameMaxLength: 50,
      minRackUnits: 1,
      maxRackUnits: 42
    },
    connection: {
      maxWaypoints: 20
    }
  },

  // API Settings
  api: {
    // Request size limits
    jsonLimit: '10mb',
    // Enable CORS (set to true if frontend is on different domain)
    cors: false,
    // Rate limiting (requests per minute per IP)
    rateLimit: {
      enabled: false,
      windowMs: 60000, // 1 minute
      max: 100 // 100 requests per minute
    }
  },

  // Logging
  logging: {
    enabled: true,
    level: process.env.LOG_LEVEL || 'info', // debug, info, warn, error
    format: 'combined' // Morgan format
  },

  // Default Device Types (seed data)
  deviceTypes: [
    { name: 'Switch 24-Port', portsCount: 24, color: '#4A90E2', rackUnits: 1 },
    { name: 'Switch 48-Port', portsCount: 48, color: '#5CA6E8', rackUnits: 1 },
    { name: 'Router', portsCount: 8, color: '#E27D60', rackUnits: 1 },
    { name: 'Firewall', portsCount: 6, color: '#E8A87C', rackUnits: 1 },
    { name: 'Server 1U', portsCount: 4, color: '#41B3A3', rackUnits: 1 },
    { name: 'Server 2U', portsCount: 4, color: '#41B3A3', rackUnits: 2 },
    { name: 'Server 4U', portsCount: 8, color: '#38A169', rackUnits: 4 },
    { name: 'Storage', portsCount: 8, color: '#38A169', rackUnits: 2 },
    { name: 'Patch Panel 24', portsCount: 24, color: '#9B59B6', rackUnits: 1 },
    { name: 'Patch Panel 48', portsCount: 48, color: '#A569BD', rackUnits: 1 }
  ]
};

module.exports = config;