import axios, { AxiosInstance, AxiosRequestConfig, AxiosResponse } from "axios";

const headers: Readonly<Record<string, string | boolean>> = {
  Accept: "application/json",
  "Content-Type": "application/json; charset=utf-8",
  "Access-Control-Allow-Credentials": true,
};

class HttpClient {
  private instance: AxiosInstance | null = null;

  private get http(): AxiosInstance {
    return this.instance != null ? this.instance : this.initHttp();
  }

  get<T = any, R = AxiosResponse<T>>(
    url: string,
    config?: AxiosRequestConfig,
  ): Promise<R> {
    return this.http.get<T, R>(url, config);
  }

  post<T = any, R = AxiosResponse<T>>(
    url: string,
    data?: T,
    config?: AxiosRequestConfig,
  ): Promise<R> {
    return this.http.post<T, R>(url, data, config);
  }

  put<T = any, R = AxiosResponse<T>>(
    url: string,
    data?: T,
    config?: AxiosRequestConfig,
  ): Promise<R> {
    return this.http.put<T, R>(url, data, config);
  }

  patch<T = any, R = AxiosResponse<T>>(
    url: string,
    data?: T,
    config?: AxiosRequestConfig,
  ): Promise<R> {
    return this.http.patch<T, R>(url, data, config);
  }

  delete<T = any, R = AxiosResponse<T>>(
    url: string,
    config?: AxiosRequestConfig,
  ): Promise<R> {
    return this.http.delete<T, R>(url, config);
  }

  private initHttp() {
    const http = axios.create({
      baseURL:
        "https://soroban-dapps-challenge-wrangler.julian-martinez.workers.dev",
      headers,
    });

    this.instance = http;
    return http;
  }
}

export const httpClient = new HttpClient();