/**
 * Active Identity Table Definition
 *
 * Manages the currently active identity/DID for the application.
 * Replaces the activeDid field from the settings table to improve
 * data normalization and reduce cache drift.
 *
 * @author Matthew Raymer
 * @date 2025-08-21
 */

/**
 * Active Identity record structure
 */
export interface ActiveIdentity {
  /** Primary key */
  id?: number;

  /** The currently active DID - foreign key to accounts.did */
  active_did: string;

  /** Last update timestamp in ISO format */
  updated_at?: string;
}

/**
 * Database schema for the active_identity table
 */
export const ActiveIdentitySchema = {
  active_identity: "++id, active_did, updated_at",
};

/**
 * Default values for ActiveIdentity records
 */
export const ActiveIdentityDefaults = {
  updated_at: new Date().toISOString(),
};

/**
 * Validation function for DID format
 */
export function isValidDid(did: string): boolean {
  return typeof did === "string" && did.length > 0;
}

/**
 * Create a new ActiveIdentity record
 */
export function createActiveIdentity(
  activeDid: string,
): ActiveIdentity {
  if (!isValidDid(activeDid)) {
    throw new Error(`Invalid DID format: ${activeDid}`);
  }

  return {
    active_did: activeDid,
    updated_at: new Date().toISOString(),
  };
}