/**
 * Core constants used throughout the library
 * @module core/constants
 */

/**
 * Nostr event kinds as defined in NIPs
 */
export const NostrEventKind = {
  SET_METADATA: 0,
  TEXT_NOTE: 1,
  RECOMMEND_RELAY: 2,
  CONTACTS: 3,
  ENCRYPTED_DIRECT_MESSAGE: 4,
  DELETE: 5,
  REPOST: 6,
  REACTION: 7,
  BADGE_AWARD: 8,
  CHANNEL_CREATE: 40,
  CHANNEL_METADATA: 41,
  CHANNEL_MESSAGE: 42,
  CHANNEL_HIDE_MESSAGE: 43,
  CHANNEL_MUTE_USER: 44,
  LONG_FORM_CONTENT: 30023,
} as const;

/**
 * Nostr relay message types
 */
export const NostrMessageType = {
  EVENT: 'EVENT',
  REQ: 'REQ',
  CLOSE: 'CLOSE',
  NOTICE: 'NOTICE',
  EOSE: 'EOSE',
  OK: 'OK',
  AUTH: 'AUTH'
} as const;

/**
 * Validation constants
 */
export const Validation = {
  MAX_EVENT_TAGS: 2000,
  MAX_CONTENT_LENGTH: 64000,
  MIN_POW_DIFFICULTY: 0,
  MAX_TIMESTAMP_DRIFT: 60 * 60, // 1 hour
  MAX_EXPONENTIAL_BACKOFF: 60 * 60 * 1000, // 1 hour in ms
  DEFAULT_TIMEOUT: 5000, // 5 seconds
} as const;

/**
 * Core cryptographic constants
 */
export const Crypto = {
  PRIVATE_KEY_LENGTH: 32,
  PUBLIC_KEY_LENGTH: 32,
  SIGNATURE_LENGTH: 64,
  HASH_LENGTH: 32,
  SHARED_SECRET_LENGTH: 32,
  IV_LENGTH: 16,
} as const;

/**
 * Core encoding constants
 */
export const Encoding = {
  HEX_PREFIX: '0x',
} as const;

/**
 * Protocol constants
 */
export const Protocol = {
  DEFAULT_RELAY_URL: 'wss://relay.nostr.info',
  RECONNECT_DELAY: 1000,
  MAX_RECONNECT_DELAY: 30000,
  PING_INTERVAL: 30000,
  SUBSCRIPTION_TIMEOUT: 10000,
} as const;

/**
 * Default values
 */
export const Defaults = {
  KIND: NostrEventKind.TEXT_NOTE,
  CREATED_AT: () => Math.floor(Date.now() / 1000),
  TAGS: [] as string[][],
  CONTENT: '',
} as const;

/**
 * Regular expressions for validation
 */
export const Regex = {
  HEX: /^[0-9a-fA-F]*$/,
} as const;