package com.vci.ubcs.code.service.impl;

import com.alibaba.fastjson.JSON;
import com.vci.ubcs.code.entity.TokenUserObject;
import com.vci.ubcs.code.service.IPasswordFreeLoginService;
import com.vci.ubcs.code.util.HttpUtils;
import io.jsonwebtoken.Claims;
import org.apache.http.auth.AuthenticationException;
import org.springblade.core.jwt.JwtUtil;
import org.springblade.core.jwt.props.JwtProperties;
import org.springblade.core.log.exception.ServiceException;
import org.springblade.core.redis.cache.BladeRedis;
import org.springblade.core.secure.BladeUser;
import org.springblade.core.tool.support.Kv;
import org.springblade.core.tool.utils.Func;
import org.springblade.core.tool.utils.ObjectUtil;
import org.springblade.core.tool.utils.SpringUtil;
import org.springblade.core.tool.utils.StringUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Service;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;

import javax.servlet.ServletRequest;
import javax.servlet.http.HttpServletRequest;
import java.util.List;
import java.util.Map;

import static org.springblade.core.secure.utils.AuthUtil.parseJWT;

/**
 * 免密登录服务
 * @author ludc
 * @date 2023/9/11 15:45
 */
@Service
public class PasswordFreeLoginServiceImpl implements IPasswordFreeLoginService {

	// 通过服务注册中心获取网关的端口号
	@Autowired
	private DiscoveryClient discoveryClient;
	// 配置的免密登录的账号所属的租户id
	@Value("${password-free.pwd-free-tenant-id}")
	// 配置的token在redis中的生存时间
	private String pwdFreeTenantId;
	@Value("${password-free.token-redis-expire}")
	private Long tokenRedisExpire;
	@Autowired
	private BladeRedis bladeRedis;

	// 缓存名
	public static final String PWD_FREE_LOGIN_TOKEN = "pwdFreeLogin:Token:";
	private static JwtProperties jwtProperties;

	/**
	 * 根据服务名获取端口号
	 * @param serviceId
	 * @return
	 */
	public String getGatewayPort(String serviceId) {
		List<ServiceInstance> instances = discoveryClient.getInstances(serviceId);
		if (!instances.isEmpty()) {
			ServiceInstance gatewayInstance = instances.get(0);
			return String.valueOf(gatewayInstance.getPort());
		}
		return "8080";
	}

	/**
	 * 免密登录，改变当前webservice请求的header
	 * @param userName 账号
	 * @return
	 */
	@Override
	public boolean passwordFreeLogin(String userName, ServletRequest servletRequest) throws AuthenticationException {
		//进来先判断缓存中是否存在token
		// 请求来自己哪个ip地址
		HttpServletRequest request = (HttpServletRequest) servletRequest;
		String ipAddr = request.getRemoteAddr();
		// 先尝试从缓存当中取，存在就直接从缓存中获取
		String authToken = bladeRedis.get(PWD_FREE_LOGIN_TOKEN+ipAddr+":"+userName);
		BladeUser user = null;
		//不存在就请求
		if(Func.isEmpty(authToken)){
			// 免密登录接口地址
			String loginUrl = "http://localhost:"+this.getGatewayPort("ubcs-gateway")+"/ubcs-auth/oauth/token";
			// 请求ubcs-auth服务获取token，先设置请求头
			HttpHeaders headers = new HttpHeaders();
			headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
			headers.set("Authorization", "Basic c3dvcmQ6c3dvcmRfc2VjcmV0");
			headers.set("Tenant-Id", pwdFreeTenantId);
			//设置请求体参数
			MultiValueMap<String,String> parameters = new LinkedMultiValueMap<String,String>();
			parameters.add("username",userName);
			parameters.add("grant_type", "passwordfree");
			parameters.add("scope", "all");
			parameters.add("type", "account");
			String responseBody = null;
			try {
				// 发送POST请求
				responseBody = HttpUtils.post(loginUrl, parameters,headers);
			}catch (Exception e){
				throw new AuthenticationException("调用鉴权服务ubcs-auth失败，原因："+e.getMessage());
			}
			//拿到响应体其中包含token,用request中的ip地址作为键值，将token存入缓存
			TokenUserObject tokenUserObject = null;
			try {
				tokenUserObject = JSON.parseObject(responseBody, TokenUserObject.class);
			}catch (Exception e){
				throw new ServiceException("鉴权响应内容转换为TokenUserObject失败:"+e.getMessage());
			}
			// 拼接token格式
			authToken = "bearer " + tokenUserObject.getAccess_token();
			// 将token存入缓存当中,过期时间为24小时
			bladeRedis.setEx(PWD_FREE_LOGIN_TOKEN+ipAddr+":"+userName,"bearer "+tokenUserObject.getAccess_token(),tokenRedisExpire);
		}
		// 解析token存放进attr中
		String token2 = JwtUtil.getToken(authToken);
		user = this.getUser(token2);
		//request.setAttribute("Blade-Auth",token);
		request.setAttribute("_BLADE_USER_REQUEST_ATTR_",user);
		return true;
	}

	/**
	 * 根据token获取用户信息
	 * @param token
	 * @return
	 */
	private static BladeUser getUser(String token) {
		Claims claims = getClaims(token);
		if (claims == null) {
			return null;
		} else {
			String clientId = Func.toStr(claims.get("client_id"));
			Long userId = Func.toLong(claims.get("user_id"));
			String tenantId = Func.toStr(claims.get("tenant_id"));
			String oauthId = Func.toStr(claims.get("oauth_id"));
			String deptId = Func.toStrWithEmpty(claims.get("dept_id"), "-1");
			String postId = Func.toStrWithEmpty(claims.get("post_id"), "-1");
			String roleId = Func.toStrWithEmpty(claims.get("role_id"), "-1");
			String account = Func.toStr(claims.get("account"));
			String roleName = Func.toStr(claims.get("role_name"));
			String userName = Func.toStr(claims.get("user_name"));
			String nickName = Func.toStr(claims.get("nick_name"));
			String tenantName = Func.toStr(claims.get("tenantName"));
			String email = Func.toStr(claims.get("email"));
			String deptName = Func.toStr(claims.get("deptName"));
			String secretGrade = Func.toStr(claims.get("secretGrade"));
			Kv detail = Kv.create().setAll((Map)claims.get("detail"));
			BladeUser bladeUser = new BladeUser();
			bladeUser.setClientId(clientId);
			bladeUser.setUserId(userId);
			bladeUser.setTenantId(tenantId);
			bladeUser.setOauthId(oauthId);
			bladeUser.setAccount(account);
			bladeUser.setDeptId(deptId);
			bladeUser.setPostId(postId);
			bladeUser.setRoleId(roleId);
			bladeUser.setRoleName(roleName);
			bladeUser.setUserName(userName);
			bladeUser.setNickName(nickName);
			detail.put("tenantName", tenantName);
			detail.put("deptName", deptName);
			detail.put("email", email);
			detail.put("secretGrade", secretGrade);
			bladeUser.setDetail(detail);
			return bladeUser;
		}
	}

	/**
	 * 解析token
	 * @param authToken
	 * @return
	 */
	private static Claims getClaims(String authToken) {
		Claims claims = null;
		String token = null;
		String tenantId;
		if (StringUtil.isNotBlank(authToken)) {
			token = JwtUtil.getToken(authToken);
		}

		if (StringUtil.isNotBlank(token)) {
			claims = parseJWT(token);
		}

		if (ObjectUtil.isNotEmpty(claims) && getJwtProperties().getState()) {
			tenantId = Func.toStr(claims.get("tenant_id"));
			String userId = Func.toStr(claims.get("user_id"));
			String accessToken = JwtUtil.getAccessToken(tenantId, userId, token);
			if (!token.equalsIgnoreCase(accessToken)) {
				return null;
			}
		}

		return claims;
	}

	private static JwtProperties getJwtProperties() {
		if (jwtProperties == null) {
			jwtProperties = (JwtProperties) SpringUtil.getBean(JwtProperties.class);
		}

		return jwtProperties;
	}


}