package com.gkhy.exam.system.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.gkhy.exam.common.api.CommonPage;
import com.gkhy.exam.common.config.MinioConfig;
import com.gkhy.exam.common.constant.UserConstant;
import com.gkhy.exam.common.domain.entity.SysUser;
import com.gkhy.exam.common.enums.PrivatizeEnum;
import com.gkhy.exam.common.enums.ResourceTypeEnum;
import com.gkhy.exam.common.enums.UserTypeEnum;
import com.gkhy.exam.common.exception.ApiException;
import com.gkhy.exam.common.utils.PageUtils;
import com.gkhy.exam.common.utils.SecurityUtils;
import com.gkhy.exam.system.domain.ExResource;
import com.gkhy.exam.system.mapper.ExResourceMapper;
import com.gkhy.exam.system.service.ExResourceService;
import com.gkhy.exam.system.service.SysCommonService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * <p>
 * 课程资源表 服务实现类
 * </p>
 *
 * @author kzy
 * @since 2024-06-06 10:25:36
 */
@Service
public class ExResourceServiceImpl extends ServiceImpl<ExResourceMapper, ExResource> implements ExResourceService {
    @Autowired
    private SysCommonService commonService;

    @Autowired
    private MinioConfig minioConfig;



    @Override
    public CommonPage selectResourseList(ExResource resource) {
        SysUser currentUser = SecurityUtils.getLoginUser().getUser();
        if(!currentUser.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())){
            resource.setCompanyId(currentUser.getCompanyId());
        }
        PageUtils.startPage();
        List<ExResource> resourceList=baseMapper.selectResourceList(resource);
        resourceList.forEach(item -> {
            item.setResourcePath(minioConfig.getEndpoint()+minioConfig.getBucketName()+"/"+item.getResourcePath());
        });
        return CommonPage.restPage(resourceList);
    }

    @Override
    public ExResource selectResourceById(Long resourceId) {
        ExResource resource= baseMapper.selectResourceById(resourceId);
        if(resource==null){
            return resource;
        }
        resource.setResourcePath(minioConfig.getEndpoint()+minioConfig.getBucketName()+"/"+resource.getResourcePath());
        if(resource.getPrivatize().equals(PrivatizeEnum.PUBLIC.getCode())){
            return resource;
        }
        SysUser currentUser=SecurityUtils.getLoginUser().getUser();
        if(currentUser.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())){
            return resource;
        }
        if(!resource.getCompanyId().equals(currentUser.getCompanyId())){
            throw new ApiException("无权限查看其它企业资源");
        }

        return resource;
    }

    @Override
    public ExResource selectResourceByPeriodId(Long periodId) {
        ExResource resource= baseMapper.selectResourceByPeriodId(periodId);
        if(resource==null){
            return resource;
        }
        resource.setResourcePath(minioConfig.getEndpoint()+minioConfig.getBucketName()+"/"+resource.getResourcePath());
        if(resource.getPrivatize().equals(PrivatizeEnum.PUBLIC.getCode())){
            return resource;
        }
        SysUser currentUser=SecurityUtils.getLoginUser().getUser();
        if(currentUser.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())){
            return resource;
        }
        if(!resource.getCompanyId().equals(currentUser.getCompanyId())){
            throw new ApiException("无权限查看其它企业资源");
        }
        return resource;

    }

    @Override
    public int insertResource(ExResource resource) {
        if(resource.getResourceType().equals(ResourceTypeEnum.VIDEO.getCode())||resource.getResourceType().equals(ResourceTypeEnum.AUDIO.getCode())){
            if(resource.getResourceLength()==null){
                throw new ApiException("视频或者音频时长不能为空");
            }
        }else{
            if(resource.getDocPage()==null){
                throw new ApiException("文档页数不能为空");
            }
        }
        SysUser user=SecurityUtils.getLoginUser().getUser();
        if(user.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())){
            resource.setPrivatize(PrivatizeEnum.PUBLIC.getCode());
        }else{
            resource.setCompanyId(user.getCompanyId());
        }
        checkUserAllowed(resource);
        if(!checkNameUnique(resource)){
            throw new ApiException("资源名称已存在");
        }
        resource.setCreateBy(SecurityUtils.getUsername());
        int row=baseMapper.insert(resource);
        if(row<1){
            throw new ApiException("新增资源失败");
        }
        return row;
    }

    @Override
    public int updateResource(ExResource resource) {
        if(resource.getResourceType().equals(ResourceTypeEnum.VIDEO.getCode())||resource.getResourceType().equals(ResourceTypeEnum.AUDIO.getCode())){
            if(resource.getResourceLength()==null){
                throw new ApiException("视频或者音频时长不能为空");
            }
        }else{
            if(resource.getDocPage()==null){
                throw new ApiException("文档页数不能为空");
            }
        }
        checkUserAllowed(resource);
        if(!checkNameUnique(resource)){
            throw new ApiException("资源名称已存在");
        }
        String resourcePath=resource.getResourcePath();
        if(resourcePath.startsWith(minioConfig.getEndpoint()+minioConfig.getBucketName()+"/")) {
            resourcePath = resourcePath.replace(minioConfig.getEndpoint()+minioConfig.getBucketName() + "/", "");
            resource.setResourcePath(resourcePath);
        }
        int row=baseMapper.updateById(resource);
        if(row<1){
            throw new ApiException("更新资源失败");
        }
        return row;
    }

    public void checkUserAllowed(ExResource resource) {
        SysUser currentUser= SecurityUtils.getLoginUser().getUser();
        if(currentUser.getUserType().equals(UserTypeEnum.SYSTEM_USER.getCode())){
            return;
        }
        if(currentUser.getUserType().equals(UserTypeEnum.STUDENT.getCode())){
            throw new ApiException("没有权限操作");
        }
        if(resource.getCompanyId()!=null&&!currentUser.getCompanyId().equals(resource.getCompanyId())){
            throw new ApiException("没有权限操作其他企业资源");
        }
    }

    @Override
    @Transactional(rollbackFor = RuntimeException.class)
    public int deleteResourceById(Long resourceId) {
        checkUserAllowed(baseMapper.selectById(resourceId));
        //校验资源是否绑定
        int count= baseMapper.checkResourceAssign(resourceId);
        if(count>0){
            throw new ApiException("资源已跟课时关联，不能删除");
        }
        ExResource resource=getById(resourceId);
        int row=baseMapper.deleteById(resourceId);
        if(row<1){
            throw new ApiException("删除资源失败");
        }
        //删除文件
        commonService.removeMinioFile(resourceId,resource.getResourcePath());
        return row;
    }

    @Override
    public boolean checkNameUnique(ExResource resource) {
        Long resourceId=resource.getId()==null?-1L:resource.getId();
        ExResource res= baseMapper.checkNameUnique(resource.getName(),resource.getCompanyId());
        if(res!=null&&res.getId().longValue()!=resourceId.longValue()){
            return UserConstant.NOT_UNIQUE;
        }
        return UserConstant.UNIQUE;
    }
}