package com.yunhai.notice.service.impl;

import com.yunhai.notice.model.SchTeaList;
import com.yunhai.notice.service.IClassService;
import com.yunhai.platform.apistd.BizException;
import com.yunhai.platform.utils.exception.ErrorCode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.ParameterizedTypeReference;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;
import org.springframework.web.client.RestClientException;
import org.springframework.web.client.RestTemplate;

import java.util.Collections;
import java.util.List;

/**
 * 班级管理（bschclass）开放接口实现。
 * bschclass 为开放接口（无需应用签名），使用独立 RestTemplate 直连。
 */
@Service
public class ClassService implements IClassService {

    private static final Logger log = LoggerFactory.getLogger(ClassService.class);

    /** 班级管理服务基址，如 http://base.yunhaixingtong.com/bschclass */
    @Value("${yh.open.bschclass:}")
    private String bschClassHost;

    private final RestTemplate restTemplate;

    public ClassService() {
        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
        factory.setConnectTimeout(5000);
        factory.setReadTimeout(10000);
        this.restTemplate = new RestTemplate(factory);
    }

    @Override
    public List<SchTeaList> getSchTeaList(int schId) {
        if (!StringUtils.hasText(bschClassHost)) {
            throw new BizException(ErrorCode.INTERNAL_SERVER_ERROR, "班级管理接口未配置（yh.open.bschclass）");
        }
        String url = bschClassHost + "/oapi/DbClass/GetSchteaList?Group=" + schId;
        try {
            ResponseEntity<List<SchTeaList>> resp = restTemplate.exchange(
                    url, HttpMethod.GET, null,
                    new ParameterizedTypeReference<List<SchTeaList>>() {
                    });
            List<SchTeaList> list = resp.getBody();
            log.info("[getSchTeaList] schId={}, 获取教师 {} 人", schId, list == null ? 0 : list.size());
            return list != null ? list : Collections.emptyList();
        } catch (RestClientException e) {
            log.error("[getSchTeaList] 请求班级管理接口失败, schId={}, url={}", schId, url, e);
            throw new BizException(ErrorCode.INTERNAL_SERVER_ERROR, "获取教师数据失败");
        }
    }
}