import type { Command } from "./command";

export type CommandRegistry = {
  get(id: string): Command<unknown> | undefined;
  list(): Command<unknown>[];
};

export function createCommandRegistry(commands: Command<unknown>[]): CommandRegistry {
  const byId = new Map<string, Command<unknown>>();

  for (const command of commands) {
    if (byId.has(command.id)) {
      throw new Error(`Duplicate command id: ${command.id}`);
    }
    byId.set(command.id, command);
  }

  return {
    get: (id) => byId.get(id),
    list: () => [...byId.values()],
  };
}