package cn.besteam.modules.system.service.impl;

import cn.besteam.common.constant.ErrorCode;
import cn.besteam.common.exception.BusinessException;
import cn.besteam.common.util.oConvertUtils;
import cn.besteam.modules.system.entity.SysPermission;
import cn.besteam.modules.system.entity.SysRolePermission;
import cn.besteam.modules.system.mapper.SysRolePermissionMapper;
import cn.besteam.modules.system.service.ISysPermissionService;
import cn.besteam.modules.system.service.ISysRolePermissionService;
import cn.besteam.modules.system.vo.AppSysPermissionVO;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.*;

/**
 * @Description: 角色-菜单权限
 * @author： besteam
 * @date： 2020-04-17
 * @version： V1.0
 */
@Service
public class SysRolePermissionServiceImpl extends ServiceImpl<SysRolePermissionMapper, SysRolePermission> implements ISysRolePermissionService {

    private static final String APP_MANAGE_PERMISSION = "app:manage";

    @Autowired
    private ISysPermissionService sysPermissionService;

    @Override
    public void saveRolePermission(Integer roleId, String permissionIds) {

        LambdaQueryWrapper<SysRolePermission> query = new QueryWrapper<SysRolePermission>().lambda().eq(SysRolePermission::getRoleId, roleId);
        this.remove(query);
        List<SysRolePermission> list = new ArrayList<SysRolePermission>();
        String[] arr = permissionIds.split(",");
        for (String p : arr) {
            if (oConvertUtils.isNotEmpty(p)) {
                SysRolePermission rolepms = new SysRolePermission(roleId, Integer.valueOf(p));
                list.add(rolepms);
            }
        }
        this.saveBatch(list);
    }

    @Override
    public void saveRolePermission(Integer roleId, String permissionIds, String lastPermissionIds) {

        List<String> add = getDiff(lastPermissionIds, permissionIds);
        if (add != null && add.size() > 0) {
            List<SysRolePermission> list = new ArrayList<SysRolePermission>();
            for (String p : add) {
                if (oConvertUtils.isNotEmpty(p)) {
                    SysRolePermission rolepms = new SysRolePermission(roleId, Integer.valueOf(p));
                    list.add(rolepms);
                }
            }
            this.saveBatch(list);
        }
        List<String> delete = getDiff(permissionIds, lastPermissionIds);
        if (delete != null && delete.size() > 0) {
            for (String permissionId : delete) {
                this.remove(new QueryWrapper<SysRolePermission>().lambda().eq(SysRolePermission::getRoleId, roleId).eq(SysRolePermission::getPermissionId, permissionId));
            }
        }
    }

    @Override
    public List<AppSysPermissionVO> getAppPermissionList(Integer roleId) {

        SysPermission appManagePermission = sysPermissionService.getOne(new QueryWrapper<SysPermission>().lambda().eq(SysPermission::getPerms, APP_MANAGE_PERMISSION));
        if (appManagePermission == null) {
            throw new BusinessException(ErrorCode.ERR_500, "未授权账号");
        }
        SysRolePermission sysRolePermission = getOne(new QueryWrapper<SysRolePermission>().lambda().eq(SysRolePermission::getRoleId, roleId).eq(SysRolePermission::getPermissionId, appManagePermission.getId()));
        if (sysRolePermission == null) {
            throw new BusinessException(ErrorCode.ERR_500, "未授权账号");
        }
        List<AppSysPermissionVO> permissionVOList = new ArrayList<>();
        List<SysPermission> permissionList = sysPermissionService.list(new QueryWrapper<SysPermission>().lambda().eq(SysPermission::getParentId, appManagePermission.getId()));
        for (SysPermission sysPermission : permissionList) {
            if (getOne(new QueryWrapper<SysRolePermission>().lambda().eq(SysRolePermission::getRoleId, roleId).eq(SysRolePermission::getPermissionId, sysPermission.getId())) == null) {
                continue;
            }
            AppSysPermissionVO permissionVO = new AppSysPermissionVO();
            permissionVO.setName(sysPermission.getName());
            permissionVO.setPerms(sysPermission.getPerms());
            permissionVOList.add(permissionVO);
        }
        return permissionVOList;
    }

    /**
     * 从diff中找出main中没有的元素
     *
     * @param main
     * @param diff
     * @return
     */
    private List<String> getDiff(String main, String diff) {

        if (oConvertUtils.isEmpty(diff)) {
            return null;
        }
        if (oConvertUtils.isEmpty(main)) {
            return Arrays.asList(diff.split(","));
        }
        String[] mainArr = main.split(",");
        String[] diffArr = diff.split(",");
        Map<String, Integer> map = new HashMap<>();
        for (String string : mainArr) {
            map.put(string, 1);
        }
        List<String> res = new ArrayList<String>();
        for (String key : diffArr) {
            if (oConvertUtils.isNotEmpty(key) && !map.containsKey(key)) {
                res.add(key);
            }
        }
        return res;
    }

}