/*
 *  Copyright 2019-2020 Zheng Jie
 *
 *  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
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  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 me.zhengjie.modules.system.rest;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.RequiredArgsConstructor;
import me.zhengjie.annotation.Log;
import me.zhengjie.modules.system.domain.Menu;
import me.zhengjie.exception.BadRequestException;
import me.zhengjie.modules.system.service.MenuService;
import me.zhengjie.modules.system.service.RoleService;
import me.zhengjie.modules.system.service.dto.MenuDto;
import me.zhengjie.modules.system.service.dto.MenuQueryCriteria;
import me.zhengjie.utils.SecurityUtils;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

/**
 * @author Zheng Jie
 * @date 2018-12-03
 */

@RestController
@RequiredArgsConstructor
@Api(tags = "系统：菜单管理")
@RequestMapping("/api/menus")
@SuppressWarnings("unchecked")
public class MenuController {

    private final MenuService menuService;
    private final RoleService roleService;
    private static final String ENTITY_NAME = "menu";

    @Log("导出菜单数据")
    @ApiOperation("导出菜单数据")
    @GetMapping(value = "/download")
    @PreAuthorize("@el.check('menu:list')")
    public void download(HttpServletResponse response, MenuQueryCriteria criteria) throws IOException {
        menuService.download(menuService.queryAll(criteria), response);
    }

    @ApiOperation("获取前端所需菜单")
    @GetMapping(value = "/build")
    public ResponseEntity<Object> buildMenus(){
        List<MenuDto> menuDtoList = menuService.findByRoles(roleService.findByUsersId(SecurityUtils.getCurrentUserId()));
        List<MenuDto> menuDtos = (List<MenuDto>) menuService.buildTree(menuDtoList).get("content");
        return new ResponseEntity<>(menuService.buildMenus(menuDtos),HttpStatus.OK);
    }

    @ApiOperation("返回全部的菜单")
    @GetMapping(value = "/tree")
    @PreAuthorize("@el.check('menu:list','roles:list')")
    public ResponseEntity<Object> getMenuTree(){
        return new ResponseEntity<>(menuService.getMenuTree(menuService.findByPid(0L)),HttpStatus.OK);
    }

    @Log("查询菜单")
    @ApiOperation("查询菜单")
    @GetMapping
    @PreAuthorize("@el.check('menu:list')")
    public ResponseEntity<Object> getMenus(MenuQueryCriteria criteria){
        List<MenuDto> menuDtoList = menuService.queryAll(criteria);
        return new ResponseEntity<>(menuService.buildTree(menuDtoList),HttpStatus.OK);
    }

    @Log("新增菜单")
    @ApiOperation("新增菜单")
    @PostMapping
    @PreAuthorize("@el.check('menu:add')")
    public ResponseEntity<Object> create(@Validated @RequestBody Menu resources){
        if (resources.getId() != null) {
            throw new BadRequestException("A new "+ ENTITY_NAME +" cannot already have an ID");
        }
        return new ResponseEntity<>(menuService.create(resources),HttpStatus.CREATED);
    }

    @Log("修改菜单")
    @ApiOperation("修改菜单")
    @PutMapping
    @PreAuthorize("@el.check('menu:edit')")
    public ResponseEntity<Object> update(@Validated(Menu.Update.class) @RequestBody Menu resources){
        menuService.update(resources);
        return new ResponseEntity<>(HttpStatus.NO_CONTENT);
    }

    @Log("删除菜单")
    @ApiOperation("删除菜单")
    @DeleteMapping
    @PreAuthorize("@el.check('menu:del')")
    public ResponseEntity<Object> delete(@RequestBody Set<Long> ids){
        Set<Menu> menuSet = new HashSet<>();
        for (Long id : ids) {
            List<Menu> menuList = menuService.findByPid(id);
            menuSet.add(menuService.findOne(id));
            menuSet = menuService.getDeleteMenus(menuList, menuSet);
        }
        menuService.delete(menuSet);
        return new ResponseEntity<>(HttpStatus.OK);
    }
}
