import { type Role, roleOf } from './AuthStore';
import { apiRequest, jsonBody } from './http';
import type { Account, AccountChange, UsersStore } from './UsersStore';

/** A refusal of the API (4xx with an `{error}`) as its bare sentence, without route and status around it. */
function refusal(status: number, data: unknown): Error | undefined {
  const message = (data as { error?: unknown } | null)?.error;
  return status >= 400 && status < 500 && typeof message === 'string' ? new Error(message) : undefined;
}

export class HttpUsersStore implements UsersStore {
  constructor(private readonly endpoint: string) {}

  async list(): Promise<Account[]> {
    const rows = await apiRequest<Account[]>(this.endpoint, 'GET', 'users', {}, refusal);
    return rows.map((row) => ({ ...row, role: roleOf(row.role) }));
  }

  async create(username: string, password: string, role: Role): Promise<void> {
    await apiRequest(this.endpoint, 'POST', 'users', jsonBody({ username, password, role }), refusal);
  }

  async update(username: string, change: AccountChange): Promise<void> {
    await apiRequest(this.endpoint, 'PATCH', `users/${username}`, jsonBody(change), refusal);
  }

  async remove(username: string): Promise<void> {
    await apiRequest<void>(this.endpoint, 'DELETE', `users/${username}`, {}, refusal);
  }
}