/**
 * Payments API SDK
 * Auto-generated — v1.0
 */
class PaymentsClient {
  constructor(token, baseUrl = 'https://api.aikdata.com/v1/payments') {
    this.token = token;
    this.baseUrl = baseUrl.replace(/\/$/, '');
  }

  // ── Charges ──

  /**
   * Create a new payment charge
   */
  async createCharge(body = null) {
    return this._request('POST', `/charge`, {}, body);
  }

  /**
   * Retrieve a charge by ID
   */
  async getCharge(id) {
    return this._request('GET', `/charge/${id}`);
  }

  /**
   * List all charges with pagination
   */
  async listCharges(query = {}) {
    return this._request('GET', `/charges`, query);
  }

  // ── Refunds ──

  /**
   * Refund a charge fully or partially
   */
  async createRefund(body = null) {
    return this._request('POST', `/refund`, {}, body);
  }


  // ── HTTP helper ──

  async _request(method, path, query = {}, body = null) {
    const url = new URL(this.baseUrl + path);
    Object.entries(query).forEach(([k, v]) => {
      if (v !== undefined && v !== null) url.searchParams.set(k, v);
    });

    const opts = {
      method,
      headers: {
        'Authorization': `Bearer ${this.token}`,
        'Content-Type': 'application/json',
        'Accept': 'application/json',
      },
    };

    if (body && ['POST', 'PUT', 'PATCH'].includes(method)) {
      opts.body = JSON.stringify(body);
    }

    const res = await fetch(url.toString(), opts);
    return { status: res.status, data: await res.json() };
  }
}

module.exports = { PaymentsClient };