package com.jmfy.controller;

import com.jmfy.WebSecurityConfig;
import com.jmfy.dao.CUserDao;
import com.jmfy.dao.ChannelInfoDao;
import com.jmfy.model.CAdmin;
import com.jmfy.model.ChannelInfo;
import com.jmfy.model.vo.IdentityEnum;
import com.jmfy.model.vo.IdentityVo;
import com.jmfy.model.vo.PowersEnum;
import com.jmfy.model.vo.PowersVo;
import com.jmfy.utils.DateUtil;
import com.jmfy.utils.JsonUtil;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.*;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.*;
import java.util.stream.Collectors;

/**
 * Created by huangds on 2017/10/24.
 */
@Controller
public class LoginController {
    @Resource
    private CUserDao cUserDao;
    @Resource
    private ChannelInfoDao channelInfoDao;

    static final String ROOT = "root";

    @GetMapping("/")
    public String index(){
        return "index";
    }

    @GetMapping("/login")
    public String login(){
        return "login";
    }

    /**
     * 欢迎界面
     * @return
     */
    @RequestMapping(value = "/welcome", method = {RequestMethod.POST, RequestMethod.GET})
    public String welcome() {
        return "welcome";
    }

    /**
     * 登陆验证
     * @param userName
     * @param session
     * @param map
     * @return
     * @throws Exception
     */
    @RequestMapping(value = "/loginVerify", method = {RequestMethod.POST, RequestMethod.GET})
    public String loginVerify(String userName,String password,HttpSession session,ModelMap map) throws Exception {
        boolean verify = false;

        CAdmin admin = cUserDao.findAdmin(userName);
        if (admin != null){
            // 验证密码
            if (password.equals(admin.getPassword())) {
                rootAccount(admin);
                verify = true;
            }
        }

        // 登陆成功,并添加session
        if (verify) {
            session.setAttribute(WebSecurityConfig.SESSION_KEY, userName);
            map.put("admin",admin);
            map.put("sidebar",PowersVo.create2(admin.getPowers()));
            return "index";
        } else {
            return "redirect:/login";
        }
    }

    /**
     * 退出登陆
     * @param session
     * @return
     */
    @GetMapping("/logout")
    public String logout(HttpSession session){
        session.removeAttribute(WebSecurityConfig.SESSION_KEY);
        return "redirect:/login";
    }

    /**
     * root账号特殊处理,登陆或注册获取全部权限
     * @param admin
     */
    private void rootAccount(CAdmin admin) throws Exception {
        if (ROOT.equals(admin.getUserName())){
            // 权限
            Set<Integer> allPowers = PowersEnum.getAllPowers();
            // 渠道包
            List<ChannelInfo> infoList = channelInfoDao.getChannelInfoList();
            Set<String> collect = infoList.stream().map(ChannelInfo::getId).collect(Collectors.toSet());

            // 赋予root账号全部权限
            admin.setPowers(allPowers);
            admin.setChannelPack(collect);

            // 赋予root账号总管理员权限
            admin.setIdentity(IdentityEnum.SYSTEM_ADMIN.getId());
            cUserDao.updateUser(admin);
        }
    }

    /**
     * 注册
     * @param session
     * @param request
     * @return
     *      1: 成功
     *      0: 账号已存在
     *      2: session缓存异常
     *      3: 没有创建账号的身份或者权限
     * @throws Exception
     */
    @PostMapping("/register")
    public @ResponseBody int register(HttpSession session, HttpServletRequest request) throws Exception {
        // 当前账号
        String account = (String) session.getAttribute(WebSecurityConfig.SESSION_KEY);
        if (account == null){
            return 2;
        }
        // 参数
        HashMap<String, String> parameterMap = JsonUtil.getInstence().getParameterMap(request);
        String userName = parameterMap.get("userName");
        String password = parameterMap.get("password");
        String identity = parameterMap.get("identity");

        // 验证账号名是否存在
        CAdmin admin = cUserDao.findAdmin(userName);
        if (admin != null){
            return 0;
        }

        // 是否拥有创建账号的身份和权限
        CAdmin cUser = cUserDao.findAdmin(account);
        if (cUser.getIdentity() == 2 || !cUser.getPowers().contains(PowersEnum.ADD_ACCOUNT.getId())){
            return 3;
        }

        admin = new CAdmin(userName,password,Integer.parseInt(identity));
        admin.setCreateTime(DateUtil.nowString());
        // 注册,入库
        cUserDao.registerAdmin(admin);

        // 添加子账号
        cUser.getSubAccount().add(userName);
        cUserDao.updateUser(cUser);

        // root账号处理
        rootAccount(admin);
        return 1;
    }

    /**
     * 注册初始化
     * @return
     *      1: 成功
     *      0: 账号已存在
     *      2: session缓存异常
     *      3: 没有创建账号的身份或者权限
     * @throws Exception
     */
    @PostConstruct
    public void registerInit(){
        try {
            // 验证账号名是否存在
            CAdmin admin = cUserDao.findAdmin(ROOT);
            if (admin != null){
                return;
            }

            // 初始化
            admin = new CAdmin();
            admin.setUserName(ROOT);
            admin.setPassword("123456");
            admin.setCreateTime(DateUtil.nowString());

            // root账号处理
            rootAccount(admin);
            // 注册,入库
            cUserDao.registerAdmin(admin);
            System.out.println("============root账号初始化完成");
        }catch (Exception e){
            e.printStackTrace();
        }
    }

    /**
     * 获取用户列表
     * @param map
     * @return
     * @throws Exception
     */
    @RequestMapping(value = "/findMemberList", method = {RequestMethod.POST, RequestMethod.GET})
    public String findMemberList(ModelMap map,HttpSession session) throws Exception {
        List<CAdmin> adminList = new ArrayList<>();
        String account = (String) session.getAttribute(WebSecurityConfig.SESSION_KEY);
        // root账号可以查看全部用户
        if (ROOT.equals(account)){
            adminList = cUserDao.findAdminList();
        }
        else {
            CAdmin admin = cUserDao.findAdmin(account);
            if (admin != null){
                // 查找账号,获取子账号列表
                Iterator<String> iterator = admin.getSubAccount().iterator();
                while (iterator.hasNext()){
                    String next = iterator.next();
                    CAdmin admin1 = cUserDao.findAdmin(next);
                    // 找不到的删除,可能是被root账号删掉了
                    if (admin1 == null){
                        iterator.remove();
                        continue;
                    }
                    adminList.add(admin1);
                }
            }
        }
        map.addAttribute("adminList",adminList);
        return "member-list";
    }

    /**
     * 删除用户
     * @param request
     * @return
     *      1: 成功
     *      0: 用户不存在
     *      2: 权限验证失败
     * @throws Exception
     */
    @RequestMapping(value = "/deleteUser", method = {RequestMethod.POST, RequestMethod.GET})
    public @ResponseBody int deleteUser(HttpServletRequest request) throws Exception {
        HashMap<String, String> parameterMap = JsonUtil.getInstence().getParameterMap(request);
        String id = parameterMap.get("id");

        // 查找用户是否存在
        CAdmin adminById = cUserDao.findAdminById(id);
        if (adminById == null || ROOT.equals(adminById.getUserName())) {
            return 0;
        }

        // 权限验证
        String userName = (String) request.getSession().getAttribute("username");
        CAdmin cAdmin = cUserDao.findAdmin(userName);
        if (cAdmin == null){
            return 2;
        }
        // 非root账号操作
        if (!ROOT.equals(userName)){
            if (!cAdmin.getSubAccount().contains(adminById.getUserName())){
                return 2;
            }
            // 删除子账号
            cAdmin.getSubAccount().remove(adminById.getUserName());
            cUserDao.updateUser(cAdmin);
        }
        // 删除用户
        cUserDao.delUser(adminById);
        return 1;
    }

    /**
     * 修改用户权限
     * @param request
     * @return
     *      0: 用户找不到
     *      1: 成功
     *      2: root账号不能修改
     * @throws Exception
     */
    @RequestMapping(value = "/updateUserPower", method = {RequestMethod.POST, RequestMethod.GET})
    public @ResponseBody int updateUserPower(HttpServletRequest request) throws Exception {
        HashMap<String, String> parameterMap = JsonUtil.getInstence().getParameterMap(request);
        String id = parameterMap.get("id");
        String[] powers = request.getParameterValues("power[]");
        // 查找用户
        CAdmin cAdmin = cUserDao.findAdminById(id);
        if (cAdmin == null){
            return 0;
        }

        // 系统管理员账号不允许修改权限,默认拥有全部权限
        if (cAdmin.getUserName().equals(ROOT)){
            return 2;
        }

        TreeSet<Integer> set = new TreeSet<>();
        if (powers != null){
            // string数组转treeSet
            Arrays.stream(powers).forEach(v->set.add(Integer.valueOf(v)));
        }
        cAdmin.setPowers(set);
        // 修改
        cUserDao.updateUser(cAdmin);
        return 1;
    }

    /**
     * 修改用户权限
     * @param request
     * @return
     *      0: 用户找不到
     *      1: 成功
     *      2: root账号不能修改
     * @throws Exception
     */
    @RequestMapping(value = "/updateUserChannelPack", method = {RequestMethod.POST, RequestMethod.GET})
    public @ResponseBody int updateUserChannelPack(HttpServletRequest request) throws Exception {
        HashMap<String, String> parameterMap = JsonUtil.getInstence().getParameterMap(request);
        String id = parameterMap.get("id");
        String[] packs = request.getParameterValues("pack[]");
        // 查找用户
        CAdmin cAdmin = cUserDao.findAdminById(id);
        if (cAdmin == null){
            return 0;
        }
        // 系统管理员账号不允许修改权限,默认拥有全部权限
        if (cAdmin.getUserName().equals(ROOT)){
            return 2;
        }
        TreeSet<String> set = new TreeSet<>();
        if (packs != null){
            // string数组转treeSet
            set.addAll(Arrays.asList(packs));
        }
        cAdmin.setChannelPack(set);
        // 修改
        cUserDao.updateUser(cAdmin);
        return 1;
    }

    /**
     * 获取用户权限
     * @param map
     * @param request
     * @return
     * @throws Exception
     */
    @RequestMapping(value ="/getUserPower",method = {RequestMethod.POST, RequestMethod.GET})
    public String getUserPower(ModelMap map,HttpServletRequest request) throws Exception {
        HashMap<String, String> parameterMap = JsonUtil.getInstence().getParameterMap(request);
        String id = parameterMap.get("id");

        String userName = (String) request.getSession().getAttribute("username");
        CAdmin admin = cUserDao.findAdmin(userName);
        CAdmin cAdmin = cUserDao.findAdminById(id);

        map.addAttribute("id",id);
        // 赋予者的权限列表
        map.addAttribute("powersMap", PowersVo.create(admin.getPowers()));
        // 被赋予者的权限列表
        map.addAttribute("powersMap2", cAdmin.getPowers());
        return "permission-setting";
    }

    /**
     * 获取用户渠道包权限
     * @param map
     * @param request
     * @return
     * @throws Exception
     */
    @RequestMapping(value ="/getUserChannelPack",method = {RequestMethod.POST, RequestMethod.GET})
    public String getUserChannelPack(ModelMap map,HttpServletRequest request) throws Exception {
        HashMap<String, String> parameterMap = JsonUtil.getInstence().getParameterMap(request);

        String id = parameterMap.get("id");
        map.addAttribute("id",id);

        // 赋予者的权限列表
        String userName = (String) request.getSession().getAttribute("username");
        CAdmin admin = cUserDao.findAdmin(userName);
        List<ChannelInfo> ids = channelInfoDao.getChannelInfoListByIds(admin.getChannelPack());
        map.addAttribute("channelPack", ids);

        // 被赋予者的权限列表
        CAdmin cAdmin = cUserDao.findAdminById(id);
        List<ChannelInfo> ids1 = channelInfoDao.getChannelInfoListByIds(cAdmin.getChannelPack());
        request.setAttribute("channelPack2", ids1);

        return "channelPack-setting";
    }

    /**
     * 修改密码
     * @param request
     * @return
     *      1:成功
     * @throws Exception
     */
    @RequestMapping(value = "/resetPassword",method = {RequestMethod.POST, RequestMethod.GET})
    public @ResponseBody int resetPassword(HttpServletRequest request) throws Exception{
        HashMap<String, String> parameterMap = JsonUtil.getInstence().getParameterMap(request);
        String id = parameterMap.get("id");
        CAdmin admin = cUserDao.findAdminById(id);
        admin.setPassword("123456");
        cUserDao.updateUser(admin);
        return 1;
    }

    /**
     * 验证是否可以使用添加账号功能
     * @param session
     * @return
     *      0: 失败,权限不足
     *      1: 成功
     * @throws Exception
     */
    @RequestMapping(value = "/verifyAddAdmin",method = {RequestMethod.POST, RequestMethod.GET})
    public @ResponseBody
    int verifyAddAdmin(HttpSession session) throws Exception{
        String account = (String) session.getAttribute(WebSecurityConfig.SESSION_KEY);
        CAdmin admin = cUserDao.findAdmin(account);
        if (admin == null || admin.getIdentity() == IdentityEnum.GENERAL_ACCOUNT.getId()){
            return 0;
        }
        return 1;
    }

    /**
     * 添加用户
     * @param map
     * @param session
     * @return
     * @throws Exception
     */
    @RequestMapping(value = "/addAdmin",method = {RequestMethod.POST, RequestMethod.GET})
    public String addAdmin(ModelMap map,HttpSession session) throws Exception{
        String account = (String) session.getAttribute(WebSecurityConfig.SESSION_KEY);
        CAdmin admin = cUserDao.findAdmin(account);
        List<IdentityVo> list = IdentityVo.create(admin.getIdentity());
        map.addAttribute("identityList",list);
        return "member-add";
    }

}