/**
 * Copyright 2018-2020 stylefeng & fengshuonan (https://gitee.com/stylefeng)
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.stylefeng.guns.modular.system.controller;

import cn.hutool.core.bean.BeanUtil;
import cn.stylefeng.guns.core.common.annotion.BussinessLog;
import cn.stylefeng.guns.core.common.annotion.Permission;
import cn.stylefeng.guns.core.common.constant.Const;
import cn.stylefeng.guns.core.common.constant.dictmap.MenuDict;
import cn.stylefeng.guns.core.common.constant.factory.ConstantFactory;
import cn.stylefeng.guns.core.common.constant.state.MenuStatus;
import cn.stylefeng.guns.core.common.exception.BizExceptionEnum;
import cn.stylefeng.guns.core.common.node.ZTreeNode;
import cn.stylefeng.guns.core.log.LogObjectHolder;
import cn.stylefeng.guns.modular.system.model.Menu;
import cn.stylefeng.guns.modular.system.service.IMenuService;
import cn.stylefeng.guns.modular.system.warpper.MenuWarpper;
import cn.stylefeng.roses.core.base.controller.BaseController;
import cn.stylefeng.roses.core.reqres.response.ResponseData;
import cn.stylefeng.roses.core.util.ToolUtil;
import cn.stylefeng.roses.kernel.model.exception.ServiceException;
import com.baomidou.mybatisplus.mapper.EntityWrapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.validation.Valid;
import java.util.List;
import java.util.Map;

/**
 * 菜单控制器
 *
 * @author fengshuonan
 * @Date 2017年2月12日21:59:14
 */
@Controller
@RequestMapping("/menu")
public class MenuController extends BaseController {

    private static String PREFIX = "/system/menu/";

    @Autowired
    private IMenuService menuService;

    /**
     * 跳转到菜单列表列表页面
     */
    @RequestMapping("")
    public String index() {
        return PREFIX + "menu.html";
    }

    /**
     * 跳转到菜单列表列表页面
     */
    @RequestMapping(value = "/menu_add")
    public String menuAdd() {
        return PREFIX + "menu_add.html";
    }

    /**
     * 跳转到菜单详情列表页面
     */
    @Permission(Const.ADMIN_NAME)
    @RequestMapping(value = "/menu_edit/{menuId}")
    public String menuEdit(@PathVariable Long menuId, Model model) {
        if (ToolUtil.isEmpty(menuId)) {
            throw new ServiceException(BizExceptionEnum.REQUEST_NULL);
        }
        Menu menu = this.menuService.selectById(menuId);

        //获取父级菜单的id
        Menu temp = new Menu();
        temp.setCode(menu.getPcode());
        Menu pMenu = this.menuService.selectOne(new EntityWrapper<>(temp));

        //如果父级是顶级菜单
        if (pMenu == null) {
            menu.setPcode("0");
        } else {
            //设置父级菜单的code为父级菜单的id
            menu.setPcode(String.valueOf(pMenu.getId()));
        }

        Map<String, Object> menuMap = BeanUtil.beanToMap(menu);
        menuMap.put("pcodeName", ConstantFactory.me().getMenuNameByCode(temp.getCode()));
        model.addAttribute("menu", menuMap);
        LogObjectHolder.me().set(menu);
        return PREFIX + "menu_edit.html";
    }

    /**
     * 修该菜单
     */
    @Permission(Const.ADMIN_NAME)
    @RequestMapping(value = "/edit")
    @BussinessLog(value = "修改菜单", key = "name", dict = MenuDict.class)
    @ResponseBody
    public ResponseData edit(@Valid Menu menu, BindingResult result) {
        if (result.hasErrors()) {
            throw new ServiceException(BizExceptionEnum.REQUEST_NULL);
        }
        //设置父级菜单编号
        menuSetPcode(menu);

        this.menuService.updateById(menu);
        return SUCCESS_TIP;
    }

    /**
     * 获取菜单列表
     */
    @Permission(Const.ADMIN_NAME)
    @RequestMapping(value = "/list")
    @ResponseBody
    public Object list(@RequestParam(required = false) String menuName, @RequestParam(required = false) String level) {
        List<Map<String, Object>> menus = this.menuService.selectMenus(menuName, level);
        return super.warpObject(new MenuWarpper(menus));
    }

    /**
     * 新增菜单
     */
    @Permission(Const.ADMIN_NAME)
    @RequestMapping(value = "/add")
    @BussinessLog(value = "菜单新增", key = "name", dict = MenuDict.class)
    @ResponseBody
    public ResponseData add(@Valid Menu menu, BindingResult result) {
        if (result.hasErrors()) {
            throw new ServiceException(BizExceptionEnum.REQUEST_NULL);
        }

        //判断是否存在该编号
        String existedMenuName = ConstantFactory.me().getMenuNameByCode(menu.getCode());
        if (ToolUtil.isNotEmpty(existedMenuName)) {
            throw new ServiceException(BizExceptionEnum.EXISTED_THE_MENU);
        }

        //设置父级菜单编号
        menuSetPcode(menu);

        menu.setStatus(MenuStatus.ENABLE.getCode());
        this.menuService.insert(menu);
        return SUCCESS_TIP;
    }

    /**
     * 删除菜单
     */
    @Permission(Const.ADMIN_NAME)
    @RequestMapping(value = "/remove")
    @BussinessLog(value = "删除菜单", key = "menuId", dict = MenuDict.class)
    @ResponseBody
    public ResponseData remove(@RequestParam Long menuId) {
        if (ToolUtil.isEmpty(menuId)) {
            throw new ServiceException(BizExceptionEnum.REQUEST_NULL);
        }

        //缓存菜单的名称
        LogObjectHolder.me().set(ConstantFactory.me().getMenuName(menuId));

        this.menuService.delMenuContainSubMenus(menuId);
        return SUCCESS_TIP;
    }

    /**
     * 查看菜单
     */
    @RequestMapping(value = "/view/{menuId}")
    @ResponseBody
    public ResponseData view(@PathVariable Long menuId) {
        if (ToolUtil.isEmpty(menuId)) {
            throw new ServiceException(BizExceptionEnum.REQUEST_NULL);
        }
        this.menuService.selectById(menuId);
        return SUCCESS_TIP;
    }

    /**
     * 获取菜单列表(首页用)
     */
    @RequestMapping(value = "/menuTreeList")
    @ResponseBody
    public List<ZTreeNode> menuTreeList() {
        return this.menuService.menuTreeList();
    }

    /**
     * 获取菜单列表(选择父级菜单用)
     */
    @RequestMapping(value = "/selectMenuTreeList")
    @ResponseBody
    public List<ZTreeNode> selectMenuTreeList() {
        List<ZTreeNode> roleTreeList = this.menuService.menuTreeList();
        roleTreeList.add(ZTreeNode.createParent());
        return roleTreeList;
    }

    /**
     * 获取角色列表
     */
    @RequestMapping(value = "/menuTreeListByRoleId/{roleId}")
    @ResponseBody
    public List<ZTreeNode> menuTreeListByRoleId(@PathVariable Integer roleId) {
        List<Long> menuIds = this.menuService.getMenuIdsByRoleId(roleId);
        if (ToolUtil.isEmpty(menuIds)) {
            return this.menuService.menuTreeList();
        } else {
            return this.menuService.menuTreeListByMenuIds(menuIds);
        }
    }

    /**
     * 根据请求的父级菜单编号设置pcode和层级
     */
    private void menuSetPcode(@Valid Menu menu) {
        if (ToolUtil.isEmpty(menu.getPcode()) || menu.getPcode().equals("0")) {
            menu.setPcode("0");
            menu.setPcodes("[0],");
            menu.setLevels(1);
        } else {
            long code = Long.parseLong(menu.getPcode());
            Menu pMenu = menuService.selectById(code);
            Integer pLevels = pMenu.getLevels();
            menu.setPcode(pMenu.getCode());

            //如果编号和父编号一致会导致无限递归
            if (menu.getCode().equals(menu.getPcode())) {
                throw new ServiceException(BizExceptionEnum.MENU_PCODE_COINCIDENCE);
            }

            menu.setLevels(pLevels + 1);
            menu.setPcodes(pMenu.getPcodes() + "[" + pMenu.getCode() + "],");
        }
    }

}
