package com.hollywood.applet.utils;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;

public class WeChatCodeFetcher {

    private static final String APP_ID = "wx7c416e2aca3d243b";
    private static final String APP_SECRET = "500b93923b55958df4596b752fde57ff";
//    private static final String REDIRECT_URI = "https://your.redirect.uri"; // 替换为你的重定向URI
    private static final String GET_CODE_API = "https://api.weixin.qq.com/sns/jscode2session";

    public static String fetchCode(String jsCode) throws Exception {
        URL url = new URL(GET_CODE_API);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        connection.setDoOutput(true);

        StringBuilder postData = new StringBuilder();
        postData.append("appid=").append(APP_ID);
        postData.append("&secret=").append(APP_SECRET);
        postData.append("&js_code=").append(jsCode);
        postData.append("&grant_type=authorization_code");

        byte[] postDataBytes = postData.toString().getBytes(StandardCharsets.UTF_8);
        connection.getOutputStream().write(postDataBytes);

        StringBuilder response = new StringBuilder();
        try (BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream(), StandardCharsets.UTF_8))) {
            String line;
            while ((line = in.readLine()) != null) {
                response.append(line);
            }
        }

        connection.disconnect();

        return response.toString(); // 返回JSON格式的响应，包含code
    }
}