package com.vci.ubcs.omd.repeater;

import com.alibaba.cloud.nacos.NacosDiscoveryProperties;
import com.alibaba.cloud.nacos.NacosServiceManager;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.api.naming.NamingService;
import com.alibaba.nacos.api.naming.pojo.Instance;
import com.alibaba.nacos.api.naming.pojo.ServiceInfo;
import com.vci.ubcs.common.constant.LauncherConstant;
import com.vci.ubcs.omd.dto.BtmAndLinkTypeDdlDTO;
import com.vci.ubcs.omd.vo.BtmTypeVO;
import com.vci.ubcs.omd.vo.LinkTypeVO;
import org.springblade.core.launch.constant.AppConstant;
import org.springblade.core.secure.utils.AuthUtil;
import org.springblade.core.tool.api.R;
import org.springblade.core.tool.utils.StringPool;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.*;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;
import org.springframework.web.client.HttpClientErrorException;
import org.springframework.web.client.RestTemplate;

import javax.annotation.PostConstruct;
import java.util.*;
import java.util.stream.Collectors;

/**
 * Description: 领域转发器
 *
 * @author LiHang
 * @date 2023/4/25
 */
@Component
public class DomainRepeater {

	/**
	 * 控制器路径
	 */
	public static final String API_PREFIX = "ddl";

	/**
	 * 新增或修改的转发路径名称
	 */
	public static final String API_SUBMIT = API_PREFIX + StringPool.SLASH + "submit";

	/**
	 * 表名获取表信息
	 */
	public static final String API_GET_TABLE_INFO = API_PREFIX + StringPool.SLASH + "getTableColumnByTableName";

	/**
	 * 获取全部表信息
	 */
	public static final String API_GET_ALL_TABLE_INFO = API_PREFIX + StringPool.SLASH + "getAllTableInfo";
	/**
	 * 获取数据库和业务类型中的不同的地方
	 */
	public static final String API_CHECK_DIFFERENT_REFLEX = API_PREFIX + StringPool.SLASH + "checkDifferentAndReflex";

	/**
	 * 用于构建静态服务类
	 */
	public static DomainRepeater domainRepeater;
	/**
	 * Nacos服务列表
	 */
	private static NamingService namingService;
	@Autowired
	private NacosServiceManager manager;

	@Autowired
	private NacosDiscoveryProperties properties;


	/**
	 * 拿取服务中的所有表信息
	 * @param serviceName 服务名称
	 * @return 返回结果
	 * @throws NacosException 找不到服务时抛出异常
	 */
	public static R getFromTable(String serviceName) throws NacosException{
		ResponseEntity<R> responseEntity = executeGet(getUrl(serviceName, API_GET_ALL_TABLE_INFO), new HashMap<>());
		if (responseEntity.getStatusCode().equals(HttpStatus.OK)) {
			R body = Objects.requireNonNull(responseEntity.getBody());
			return body;
		}
		return R.fail(String.valueOf(responseEntity.getStatusCode().value()));
	}

	@PostConstruct
	private void init() {
		domainRepeater = this;
		namingService = manager.getNamingService(properties.getNacosProperties());
	}

	/**
	 * 一致性检查
	 * @param ddlDTO 业务类型、链接类型传输对象
	 * @param serviceName 服务名
	 * @return 执行结果，有修改的就会返回。
	 * @throws NacosException nacos查询服务出错时抛出异常
	 */
	public static R checkDifferent(BtmAndLinkTypeDdlDTO ddlDTO,String serviceName) throws NacosException {
		try {
			String url = getUrl(serviceName, API_CHECK_DIFFERENT_REFLEX);
			ResponseEntity<R> responseEntity = executePost(url, JSONObject.toJSONString(ddlDTO), null);
			if (responseEntity.getStatusCode().equals(HttpStatus.OK)) {
				R body = Objects.requireNonNull(responseEntity.getBody());
				return body;
			}
			return R.fail(String.valueOf(responseEntity.getStatusCode().value()));
		}catch (HttpClientErrorException e) {
			if (HttpStatus.NOT_FOUND.equals(e.getStatusCode())) {
				R fail = R.fail("调用服务失败");
				fail.setCode(HttpStatus.NOT_FOUND.value());
				return fail;
			}
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
		return R.fail("未知错误");
	}

	/**
	 * 根据api接口拼接url地址
	 * @param serviceName 服务名
	 * @param api 接口地址
	 * @return url地址
	 * @throws NacosException nacos查询服务出错时抛出异常
	 */

	public static String getUrl(String serviceName,String api) throws NacosException {
		Instance service = namingService.selectOneHealthyInstance(AppConstant.APPLICATION_GATEWAY_NAME);
		return "http://" + service.getIp() + StringPool.COLON + service.getPort() + StringPool.SLASH + serviceName + StringPool.SLASH + api;
	}


	/**
	 * 新增或修改业务类型
	 * @param vo 业务类型传输对象
	 * @param serviceName 服务名
	 * @return 执行结果，有修改的就会返回。
	 */
	public static R submitBtmType(String serviceName, BtmTypeVO vo) {
		try {
			String url = getUrl(serviceName, API_SUBMIT);
			BtmAndLinkTypeDdlDTO ddlDTO = new BtmAndLinkTypeDdlDTO();
			ddlDTO.setBtmTypeList(new ArrayList<>(Collections.singletonList(vo)));
			ResponseEntity<R> responseEntity = executePost(url, JSONObject.toJSONString(ddlDTO), null);
			if (responseEntity.getStatusCode().equals(HttpStatus.OK)) {
				return responseEntity.getBody();
			}
			return R.fail(String.valueOf(responseEntity.getStatusCode().value()));
		} catch (HttpClientErrorException e) {
			if (HttpStatus.NOT_FOUND.equals(e.getStatusCode())) {
				R fail = R.fail("调用服务失败");
				fail.setCode(HttpStatus.NOT_FOUND.value());
				return fail;
			}
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
		return R.fail("未知错误");
	}

	/**
	 * 新增或修改链接类型
	 * @param vo 业务类型传输对象
	 * @param serviceName 服务名
	 * @return 执行结果，有修改的就会返回。
	 */
	public static R submitLinkType(String serviceName, LinkTypeVO vo) {
		try {
			String url = getUrl(serviceName, API_SUBMIT);
			BtmAndLinkTypeDdlDTO ddlDTO = new BtmAndLinkTypeDdlDTO();
			ddlDTO.setLinkTypeList(new ArrayList<>(Collections.singletonList(vo)));
			ResponseEntity<R> responseEntity = executePost(url, JSONObject.toJSONString(ddlDTO), null);
			if (responseEntity.getStatusCode().equals(HttpStatus.OK)) {
				return responseEntity.getBody();
			}
			return R.fail(String.valueOf(responseEntity.getStatusCode().value()));
		} catch (HttpClientErrorException e) {
			if (HttpStatus.NOT_FOUND.equals(e.getStatusCode())) {
				R fail = R.fail("调用服务失败");
				fail.setCode(HttpStatus.NOT_FOUND.value());
				return fail;
			}
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
		return R.fail("未知错误");
	}

	/**
	 * 执行httpPost接口
	 *
	 * @param url          地址
	 * @param body         请求体
	 * @param extraHeaders 请求头参数
	 * @return 执行结果
	 */
	private static ResponseEntity<R> executePost(String url, String body, Map<String, String> extraHeaders) {
		RestTemplate restTemplate = new RestTemplate();
		HttpHeaders httpHeaders = new HttpHeaders();
		httpHeaders.add("Content-Type", "application/json;charset=UTF-8");
		httpHeaders.add("Blade-Auth", AuthUtil.getHeader());
		Optional.ofNullable(extraHeaders).orElseGet(HashMap::new).forEach(httpHeaders::add);
		HttpEntity<String> request = new HttpEntity<>(body, httpHeaders);
		return restTemplate.postForEntity(url, request, R.class);
	}

	/**
	 * 执行httpGet接口
	 *
	 * @param url          地址
	 * @param extraHeaders 请求头参数
	 * @return 执行结果
	 */
	private static ResponseEntity<R> executeGet(String url,Map<String, String> extraHeaders) {
		RestTemplate restTemplate = new RestTemplate();
		HttpHeaders httpHeaders = new HttpHeaders();
		httpHeaders.add("Blade-Auth", AuthUtil.getHeader());
		HttpEntity<String> request = new HttpEntity<>(httpHeaders);
		if (!CollectionUtils.isEmpty(extraHeaders)){
			StringBuilder sb = new StringBuilder().append("?");
			extraHeaders.forEach( (k,v) -> {
				sb.append(k).append(StringPool.EQUALS).append(v).append(StringPool.AMPERSAND);
			});
			String str = sb.toString();
			if (str.endsWith(StringPool.AMPERSAND)){
				str = str.substring(0,str.length()-1);
			}
			url = url + str;
		}
		return restTemplate.exchange(url, HttpMethod.GET,request,R.class,"");
	}

	/**
	 * 获取所有已注册的服务
	 * @return 不包含默认服务的其他服务
	 * @throws NacosException
	 */
	public static List<String> getDomain() throws NacosException {
		RestTemplate restTemplate = new RestTemplate();
		String url = "http://" +LauncherConstant.NACOS_DEV_ADDR + "/nacos/v1/ns/service/list?pageNo=1&pageSize=50";
		String forObject = restTemplate.getForObject(url, String.class);
		JSONObject jsonObject = JSON.parseObject(forObject);
		return (List<String>) jsonObject.get("doms");
	}
}