import type { IncomingMessage } from "http";
import * as https from "https";

export interface WechatTokenResponse {
  access_token?: string;
  expires_in?: number;
  errcode?: number;
  errmsg?: string;
}

export function httpsGetJson(url: string): Promise<WechatTokenResponse> {
  return new Promise((resolve, reject) => {
    https.get(url, (res: IncomingMessage) => {
      let data = "";
      res.on("data", (chunk: Buffer) => {
        data += chunk;
      });
      res.on("end", () => {
        try {
          resolve(JSON.parse(data) as WechatTokenResponse);
        } catch (_error) {
          reject(new Error("Invalid JSON from WeChat API"));
        }
      });
    }).on("error", reject);
  });
}