import { HttpRequestLibrary } from "../http-common.js";
import { HttpStatusCode } from "../http-status-codes.js";
import { createPlatformHttpLib } from "../http.js";
import { FailCasesByMethod, ResultByMethod, opSuccess, opUnknownFailure } from "../operation.js";
import { codecForExchangeConfig } from "./types.js";

export type TalerExchangeResultByMethod<prop extends keyof TalerExchangeHttpClient> = ResultByMethod<TalerExchangeHttpClient, prop>
export type TalerExchangeErrorsByMethod<prop extends keyof TalerExchangeHttpClient> = FailCasesByMethod<TalerExchangeHttpClient, prop>

/**
 */
export class TalerExchangeHttpClient {
  httpLib: HttpRequestLibrary;

  constructor(
    readonly baseUrl: string,
    httpClient?: HttpRequestLibrary,
  ) {
    this.httpLib = httpClient ?? createPlatformHttpLib();
  }

  /**
   * https://docs.taler.net/core/api-merchant.html#get--config
   * 
   */
  async getConfig() {
    const url = new URL(`config`, this.baseUrl);
    const resp = await this.httpLib.fetch(url.href, {
      method: "GET"
    });
    switch (resp.status) {
      case HttpStatusCode.Ok: return opSuccess(resp, codecForExchangeConfig())
      default: return opUnknownFailure(resp, await resp.text())
    }
  }

}