package com.qmth.cdut.api;

import com.qmth.boot.api.annotation.Aac;
import com.qmth.boot.api.annotation.BOOL;
import com.qmth.boot.api.constant.ApiConstant;
import com.qmth.cdut.supwisdom.CasUtils;
import com.qmth.cdut.supwisdom.Constants;
import com.qmth.cdut.supwisdom.LoginUser;
import com.qmth.teachcloud.exchange.common.contant.SystemConstant;
import com.qmth.teachcloud.exchange.common.enums.ExceptionResultEnum;
import com.qmth.teachcloud.exchange.common.service.AuthInfoService;
import com.qmth.teachcloud.exchange.common.service.CommonService;
import com.qmth.teachcloud.exchange.common.util.Result;
import com.qmth.teachcloud.exchange.common.util.ServletUtil;
import io.swagger.annotations.*;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.Objects;
import java.util.StringJoiner;

/**
 * <p>
 * 成都理工大学开放接口前端控制器
 * </p>
 */
@Api(tags = "成都理工大学开放接口Controller")
@RestController
@RequestMapping(ApiConstant.DEFAULT_URI_PREFIX + SystemConstant.PREFIX_URL_OPEN)
@Validated
public class OpenApiController {
    private static final Logger log = LoggerFactory.getLogger(OpenApiController.class);
    private static final String schoolCode = "cdut";//测试学校code，成都理工大学

    @Resource
    CommonService commonService;

    @Resource
    AuthInfoService authInfoService;

    @Value("${cas.config.logoutUrl}")
    String logoutUrl;

    @Value("${cas.config.returnUrl}")
    String returnUrl;

    @ApiOperation(value = "成都理工大学cas鉴权接口")
    @ApiResponses({@ApiResponse(code = 200, message = "返回消息", response = Result.class)})
    @RequestMapping(value = "/authentication", method = RequestMethod.GET)
    @Aac(auth = BOOL.FALSE)
    public void sso(HttpServletRequest request, HttpServletResponse response) throws IOException {
        HttpSession session = request.getSession();
        String targetUrl = CasUtils.getTargetUrl(request);
        authInfoService.appHasExpired(schoolCode);
        if (CasUtils.isLogin(session)) {
            LoginUser loginUser = (LoginUser) session.getAttribute(Constants.LOGIN_USER_KEY);
            String account = loginUser.getAccount();

            String sessionId = session.getId();
            if (StringUtils.isNotBlank(sessionId)) {
                StringJoiner stringJoiner = new StringJoiner("");
                stringJoiner.add(logoutUrl).add(SystemConstant.GET_UNKNOWN).add("sessionId")
                        .add(SystemConstant.GET_EQUAL).add(sessionId);
                returnUrl = stringJoiner.toString();
            } else {
                throw ExceptionResultEnum.ERROR.exception("sessionId为空");
            }
            commonService.redirectLogic(account, schoolCode, returnUrl, null);
        } else {
            if (CasUtils.hasTicket(request)) {
                LoginUser loginUser = CasUtils.getLoginUser(request);
                if (loginUser.isLogin() && doLogin(loginUser, request)) {
                    CasUtils.login(loginUser, session);

                    String account = loginUser.getAccount();
                    commonService.redirectLogic(account, schoolCode, returnUrl, null);
                } else {
                    String loginUrl = CasUtils.getLoginUrl(request);
                    response.sendRedirect(loginUrl);
                    // TODO 可选：业务系统可根据实际情况进行处理
//                    response.sendRedirect(CasUtils.getErrorUrl(request));
                }
            } else {
                String loginUrl = CasUtils.getLoginUrl(request);
                response.sendRedirect(loginUrl);
            }
        }
    }

    @ApiOperation(value = "西安交通大学cas鉴权退出接口")
    @RequestMapping(value = "/authentication/logout", method = RequestMethod.GET)
    @ApiResponses({@ApiResponse(code = 200, message = "返回消息", response = Result.class)})
    @Aac(auth = BOOL.FALSE)
    public void logout(@ApiParam(value = "sessionId", required = true) @RequestParam String sessionId) throws IOException {
        if (Objects.isNull(logoutUrl) || Objects.equals(logoutUrl, "")) {
            throw ExceptionResultEnum.PARAMS_ERROR.exception("鉴权退出地址不存在");
        }
        if (Objects.isNull(sessionId) || Objects.equals(sessionId, "")) {
            throw ExceptionResultEnum.PARAMS_ERROR.exception("sessionId为空");
        }
        authInfoService.appHasExpired(schoolCode);

        HttpServletRequest request = ServletUtil.getRequest();
        HttpServletResponse response = ServletUtil.getResponse();
        if (doLogout(request)) {
            HttpSession session = request.getSession();
            CasUtils.logout(session);
            response.sendRedirect(CasUtils.getLogoutUrl(request));
        } else {
            response.sendRedirect(CasUtils.getLoginUrl(request));
        }
    }

    public boolean doLogin(LoginUser loginUser, HttpServletRequest request) {
        HttpSession session = request.getSession();
        ServletContext application = session.getServletContext();
        // 如果使用了Spring可以用下面的方法获取spring的context对象
        // WebApplicationContext appContext = WebApplicationContextUtils.getWebApplicationContext(application);
        // 如果需要使用SpringMVC上下文、可以用下面的方法获取springMVC的context对象
        // WebApplicationContext mvcContext = RequestContextUtils.getWebApplicationContext(request);

        // TODO 需要业务系统重写


        return true;
    }

    public boolean doLogout(HttpServletRequest request) {
        return true;
    }

}