import * as types from './types.js';

/**
 * Abstract Core Response class that provides a fetch-like API
 */
export abstract class CoreResponse<T = any> implements types.ICoreResponse<T> {
  protected consumed = false;

  // Public properties
  public abstract readonly ok: boolean;
  public abstract readonly status: number;
  public abstract readonly statusText: string;
  public abstract readonly headers: types.Headers;
  public abstract readonly url: string;

  /**
   * Ensures the body can only be consumed once
   */
  protected ensureNotConsumed(): void {
    if (this.consumed) {
      throw new Error('Body has already been consumed');
    }
    this.consumed = true;
  }

  /**
   * Parse response as JSON
   */
  abstract json(): Promise<T>;

  /**
   * Get response as text
   */
  abstract text(): Promise<string>;

  /**
   * Get response as ArrayBuffer
   */
  abstract arrayBuffer(): Promise<ArrayBuffer>;

  /**
   * Get response as a web-style ReadableStream
   */
  abstract stream(): ReadableStream<Uint8Array> | null;
}