export class WorkflowState {
  private readonly values: Record<string, unknown> = {};

  set(key: string, value: unknown): void {
    this.values[key] = value;
  }

  get(pathExpression: string): unknown {
    const parts = pathExpression.split(".");
    let current: unknown = this.values;

    for (const part of parts) {
      if (typeof current !== "object" || current === null || !(part in current)) {
        throw new Error(`State reference not found: state.${pathExpression}`);
      }
      current = (current as Record<string, unknown>)[part];
    }

    return current;
  }

  snapshot(): Record<string, unknown> {
    return { ...this.values };
  }
}