package com.sandu.ximon.admin.service;

import cn.hutool.core.collection.CollectionUtil;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.sandu.common.enums.RoleLevelStatus;
import com.sandu.common.execption.BusinessException;
import com.sandu.common.service.impl.BaseServiceImpl;
import com.sandu.ximon.admin.param.AdminParam;
import com.sandu.ximon.admin.param.PwdParam;
import com.sandu.ximon.admin.security.SecurityUtils;
import com.sandu.ximon.dao.domain.Admin;
import com.sandu.ximon.dao.domain.AdminRoleRelation;
import com.sandu.ximon.dao.domain.Role;
import com.sandu.ximon.dao.mapper.AdminMapper;
import lombok.AllArgsConstructor;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @author chenjiantian
 * @date 2021/11/24 11:02
 */
@Service
@AllArgsConstructor
public class AdminService extends BaseServiceImpl<AdminMapper, Admin> {

    private final PasswordEncoder passwordEncoder;
    private final AdminRoleRelationService adminRoleRelationService;
    private final RoleService roleService;

    public Admin findByUserName(String username) {
        return getOne(Wrappers.lambdaQuery(Admin.class).eq(Admin::getUsername, username).last("limit 1"));
    }

    @Transactional(rollbackFor = Exception.class)
    public boolean register(AdminParam param) {
        Admin admin = findByUserName(param.getUsername());
        if (admin != null) {
            throw new BusinessException("当前账号" + param.getUsername() + "已经存在");
        }
        Admin save = new Admin();
        save.setUsername(param.getUsername());
        save.setPassword(passwordEncoder.encode(param.getPassword()));
        save.setNickName(param.getNickName());
        save.setMobile(param.getMobile());
        save.setNote(param.getNote());
        if (!save(save)) {
            throw new BusinessException("注册管理员失败");
        }

        Role role = roleService.getById(param.getRoleId());
        if (role == null) {
            throw new BusinessException("角色不存在");
        }
        if (RoleLevelStatus.SUPER.getCode().equals(role.getLevel())) {
            throw new BusinessException("无法添加超级管理员");
        }

        AdminRoleRelation adminRoleRelation = new AdminRoleRelation();
        adminRoleRelation.setAdminId(save.getId());
        adminRoleRelation.setRoleId(param.getRoleId());
        if (!adminRoleRelationService.save(adminRoleRelation)) {
            throw new BusinessException("添加管理员角色失败");
        }
        return true;
    }

    @Transactional(rollbackFor = Exception.class)
    public boolean updateAdmin(Long adminId, AdminParam param) {
        Admin admin = getById(adminId);
        if (admin == null) {
            throw new BusinessException("找不到管理员");
        }
        List<Role> roles = roleService.listByAdminId(admin.getId());
        if (CollectionUtil.isEmpty(roles)) {
            throw new BusinessException("当前用户没有角色");
        }
        List<Integer> levels = roles.stream().map(Role::getLevel).collect(Collectors.toList());
        int min = Collections.min(levels);
        roleService.assertLevels(min);

        Admin update = new Admin();
        update.setId(adminId);
        update.setPassword(passwordEncoder.encode(param.getPassword()));
        update.setNickName(param.getNickName());
        update.setMobile(param.getMobile());
        update.setNote(param.getNote());
        if (!updateById(update)) {
            throw new BusinessException("编辑管理员失败");
        }

        adminRoleRelationService.remove(Wrappers.lambdaQuery(AdminRoleRelation.class).eq(AdminRoleRelation::getAdminId,admin));
        AdminRoleRelation adminRoleRelation = new AdminRoleRelation();
        adminRoleRelation.setAdminId(adminId);
        adminRoleRelation.setRoleId(param.getRoleId());
        if (!adminRoleRelationService.save(adminRoleRelation)) {
            throw new BusinessException("添加管理员角色失败");
        }

        return true;
    }

    public boolean updateMyPassword(PwdParam param) {
        if (!StrUtil.equals(param.getNewPass(), param.getConfirmPass())) {
            throw new BusinessException("两次密码不一致");
        }
        Long userId = SecurityUtils.getUserId();
        Admin admin = getById(userId);
        if (admin == null) {
            throw new BusinessException("用户不存在");
        }
        if (!passwordEncoder.matches(param.getOldPass(), admin.getPassword())) {
            throw new BusinessException("旧密码不正确");
        }
        Admin update = new Admin();
        update.setId(userId);
        update.setPassword(passwordEncoder.encode(param.getNewPass()));
        return updateById(update);
    }

    public boolean deleteAdmin(Long adminId) {
        Admin admin = getById(adminId);
        if (admin == null) {
            throw new BusinessException("找不到管理员");
        }
        List<Role> roles = roleService.listByAdminId(admin.getId());
        if (CollectionUtil.isEmpty(roles)) {
            throw new BusinessException("当前用户没有角色");
        }
        List<Integer> levels = roles.stream().map(Role::getLevel).collect(Collectors.toList());
        int min = Collections.min(levels);
        int maxLevel = roleService.assertLevels(min);
        if(!RoleLevelStatus.SUPER.getCode().equals(maxLevel)){
            throw new BusinessException("只有超级管理员才能删除用户");
        }

        return removeById(adminId);
    }
}