package com.gk.study.controller;

import com.gk.study.common.APIResponse;
import com.gk.study.common.ResponeCode;
import com.gk.study.entity.Banner;
import com.gk.study.permission.Access;
import com.gk.study.permission.AccessLevel;
import com.gk.study.service.BannerService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.UUID;

@RestController
@RequestMapping("/banner")
public class BannerController {

    private final static Logger logger = LoggerFactory.getLogger(BannerController.class);

    @Autowired
    BannerService service;

    @Value("${File.uploadPath}")
    private String uploadPath;

    @RequestMapping(value = "/list", method = RequestMethod.GET)
    public APIResponse list(){
        List<Banner> list =  service.getBannerList();

        return new APIResponse(ResponeCode.SUCCESS, "查询成功", list);
    }

    @Access(level = AccessLevel.ADMIN)
    @RequestMapping(value = "/create", method = RequestMethod.POST)
    @Transactional
    public APIResponse create(Banner banner) throws IOException {
        String image = saveBanner(banner);
        if(!StringUtils.isEmpty(image)) {
            banner.image = image;
        }

        service.createBanner(banner);
        return new APIResponse(ResponeCode.SUCCESS, "创建成功");
    }

    @Access(level = AccessLevel.ADMIN)
    @RequestMapping(value = "/delete", method = RequestMethod.POST)
    public APIResponse delete(String ids){
        System.out.println("ids===" + ids);
        // 批量删除
        String[] arr = ids.split(",");
        for (String id : arr) {
            service.deleteBanner(id);
        }
        return new APIResponse(ResponeCode.SUCCESS, "删除成功");
    }

    @Access(level = AccessLevel.ADMIN)
    @RequestMapping(value = "/update", method = RequestMethod.POST)
    @Transactional
    public APIResponse update(Banner banner) throws IOException {
        String image = saveBanner(banner);
        if(!StringUtils.isEmpty(image)) {
            banner.image = image;
        }

        service.updateBanner(banner);
        return new APIResponse(ResponeCode.SUCCESS, "更新成功");
    }

    public String saveBanner(Banner banner) throws IOException {
        MultipartFile file = banner.getImageFile();
        String newFileName = null;
        if(file !=null && !file.isEmpty()) {

            // 存文件
            String oldFileName = file.getOriginalFilename();
            String randomStr = UUID.randomUUID().toString();
            newFileName = randomStr + oldFileName.substring(oldFileName.lastIndexOf("."));
            String filePath = uploadPath + File.separator + "banner" + File.separator + newFileName;
            File destFile = new File(filePath);
            if(!destFile.getParentFile().exists()){
                destFile.getParentFile().mkdirs();
            }
            file.transferTo(destFile);
        }
        if(!StringUtils.isEmpty(newFileName)) {
            banner.image = newFileName;
        }
        return newFileName;
    }
}