// src/config/config.ts
import { SystemConfiguration, DistanceMetric } from '../types'; // Đảm bảo đường dẫn đúng và kiểu thống nhất
import os from 'os'; // Import os nếu cần

/**
 * Default system configuration for the vector database ecosystem.
 * Provides reasonable starting values for various modules.
 * THIS IS THE SINGLE SOURCE OF TRUTH FOR DEFAULTS.
 */
export const defaultSystemConfiguration: SystemConfiguration = {
  version: '0.1.0',

  persistence: {
    dbPath: `${process.env.NBASE_DB_PATH}` || 'database',
    autoSave: true,
    saveIntervalMs: 1 * 60 * 1000, // 1 minutes
    useCompression: true,
  },

  defaults: {
    vectorSize: 1536,
    k: 10,
    distanceMetric: 'euclidean' as DistanceMetric,
    cacheSize: 1000, // Thêm default cacheSize
    maxConcurrentSearches: Math.max(1, os.cpus().length - 1), // Thêm default maxConcurrentSearches
    dimensionMismatchPenalty: 0.01, // Default penalty factor for dimension mismatches.
  },

  clustering: {
    clusterSize: 100,
    newClusterThresholdFactor: 1.5,
    newClusterDistanceThreshold: 0.5,
    maxClusters: 1000,
    distanceMetric: 'euclidean' as DistanceMetric,
    useCompression: true,
  },

  partitioning: {
    partitionsDir: './database/partitions',
    partitionCapacity: 100000,
    autoLoadPartitions: true,
    autoCreatePartitions: true,
    maxActivePartitions: 3,
  },

  indexing: {
    indexPath: './database/indexes',
    buildOnStart: true,
    autoSave: true,
    runKMeansOnLoad: true,
    autoRebuildThreshold: 500,
    hnsw: {
      // Không cần enable ở đây, logic enable nên ở code sử dụng
      M: 16,
      efConstruction: 200,
      efSearch: 50,
      distanceMetric: 'euclidean' as DistanceMetric,
      nodes: [],
    },
    lsh: {
      // Không cần enable ở đây
      numberOfHashes: 128,
      numberOfBuckets: 1024,
    },
    pq: {
      subvectorSize: 8,
      numClusters: 256,
    },
  },

  batchSearch: {
    maxBatchSize: 64,
    prioritizeOrder: true,
    groupSimilarQueries: false,
    defaultSearchTimeoutMs: 15000,
  },

  monitoring: {
    enable: true,
    intervalMs: 60000,
    historySize: 60,
    logToConsole: false,
    enableSystemMetrics: true,
    enableSearchMetrics: true,
    enableDatabaseMetrics: true,
    enableCacheMetrics: true,
  },

  backup: {
    // Thêm mục backup nếu cần
    backupIntervalMs: 60 * 1000, // 60 minisecon default
    // Thêm các tùy chọn backup khác nếu có
  },

  server: {
    port: parseInt(process.env.NBASE_PORT || '1307', 10),
    host: process.env.NBASE_HOST || 'localhost',
    enableRateLimit: false,
    maxRequestsPerMinute: 1000,
    rateLimit: {
      windowMs: 1 * 60 * 1000, // 1 minute
      enable: true,
      maxRequestsPerMinute: 500,
    },
  },
};