/**
 * Constants used in the Nostr protocol
 * @module constants
 */

/**
 * Nostr protocol message types as defined in NIP-01
 * @constant
 * @type {const}
 */
export const NOSTR_MESSAGE_TYPE = {
  /** Client sending an event to a relay */
  EVENT: 'EVENT',
  /** Client requesting events from a relay */
  REQ: 'REQ',
  /** Client closing a subscription */
  CLOSE: 'CLOSE',
  /** Relay sending a notice/message to a client */
  NOTICE: 'NOTICE',
  /** Relay acknowledging an event */
  OK: 'OK',
  /** Relay requesting client authentication */
  AUTH: 'AUTH',
  /** Relay indicating end of stored events */
  EOSE: 'EOSE'
} as const;

/**
 * Standard Nostr event kinds as defined in various NIPs
 * @constant
 * @type {const}
 */
export const NOSTR_KIND = {
  /** User metadata (NIP-01) */
  METADATA: 0,
  /** Text note (NIP-01) */
  TEXT_NOTE: 1,
  /** Relay recommendation (NIP-01) */
  RECOMMEND_SERVER: 2,
  /** Contact list (NIP-02) */
  CONTACTS: 3,
  /** Encrypted direct message (NIP-04) */
  ENCRYPTED_DIRECT_MESSAGE: 4,
  /** Event deletion (NIP-09) */
  DELETE: 5,
  /** Event repost (NIP-18) */
  REPOST: 6,
  /** Reaction (NIP-25) */
  REACTION: 7,
  /** Badge award (NIP-58) */
  BADGE_AWARD: 8,
  /** Channel creation (NIP-28) */
  CHANNEL_CREATE: 40,
  /** Channel metadata (NIP-28) */
  CHANNEL_METADATA: 41,
  /** Channel message (NIP-28) */
  CHANNEL_MESSAGE: 42,
  /** Channel hide message (NIP-28) */
  CHANNEL_HIDE_MESSAGE: 43,
  /** Channel mute user (NIP-28) */
  CHANNEL_MUTE_USER: 44,
  /** File header (NIP-94) */
  FILE_HEADER: 1063,
  /** File chunk (NIP-94) */
  FILE_CHUNK: 1064
} as const;

/**
 * Common Nostr tags as defined in various NIPs
 * @constant
 * @type {const}
 */
export const NOSTR_TAG = {
  /** Reference to another event */
  EVENT: 'e',
  /** Reference to a pubkey */
  PUBKEY: 'p',
  /** Reference to a replaceable event */
  REFERENCE: 'a',
  /** NIP-26 delegation tag */
  DELEGATION: 'delegation',
  /** Identifier for replaceable events */
  DEDUPLICATION: 'd',
  /** Event expiration timestamp */
  EXPIRATION: 'expiration',
  /** Event kind being referenced */
  KIND: 'k',
  /** Relay URL */
  RELAY: 'r',
  /** Subject or title */
  SUBJECT: 'subject',
  /** Content warning */
  CONTENT_WARNING: 'content-warning',
  /** Proof of work nonce */
  NONCE: 'nonce'
} as const;

/** Type for message types extracted from NOSTR_MESSAGE_TYPE constant */
export type NostrMessageType = typeof NOSTR_MESSAGE_TYPE[keyof typeof NOSTR_MESSAGE_TYPE];

/** Type for event kinds extracted from NOSTR_KIND constant */
export type NostrKind = typeof NOSTR_KIND[keyof typeof NOSTR_KIND];

/** Type for tags extracted from NOSTR_TAG constant */
export type NostrTag = typeof NOSTR_TAG[keyof typeof NOSTR_TAG];