package com.fdkankan.download.service.impl;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.collection.ConcurrentHashSet;
import cn.hutool.core.date.DateUtil;
import cn.hutool.core.date.TimeInterval;
import cn.hutool.core.io.FileUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.core.util.ZipUtil;
import cn.hutool.http.HttpUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.fdkankan.common.constant.CommonStatus;
import com.fdkankan.common.constant.ErrorCode;
import com.fdkankan.common.constant.SceneDownloadProgressStatus;
import com.fdkankan.common.constant.SceneKind;
import com.fdkankan.common.exception.BusinessException;
import com.fdkankan.common.util.FileUtils;
import com.fdkankan.download.CommonConstant;
import com.fdkankan.download.bean.ImageType;
import com.fdkankan.download.bean.ImageTypeDetail;
import com.fdkankan.download.bean.SceneEditControlsBean;
import com.fdkankan.download.bean.SceneViewInfoBean;
import com.fdkankan.download.entity.ScenePlus;
import com.fdkankan.download.entity.ScenePlusExt;
import com.fdkankan.download.service.IDownloadService;
import com.fdkankan.download.service.IScenePlusExtService;
import com.fdkankan.download.service.IScenePlusService;
import com.fdkankan.redis.constant.RedisKey;
import com.fdkankan.redis.util.RedisUtil;
import com.google.common.collect.Lists;
import lombok.extern.slf4j.Slf4j;
import lombok.var;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.io.File;
import java.io.FileInputStream;
import java.math.BigDecimal;
import java.net.URLEncoder;
import java.util.*;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;
import com.fdkankan.model.constants.UploadFilePath;
import com.fdkankan.fyun.face.FYunFileServiceInterface;
import com.fdkankan.fyun.constant.FYunTypeEnum;

import javax.annotation.Resource;

@Slf4j(topic = "IDownloadService")
@Service
public class DownloadServiceImpl implements IDownloadService {

//    private static final List<ImageType> imageTypes = Lists.newArrayList();
//    static{
//        imageTypes.add(ImageType.builder().name("4k_face").size("4096").ranges(new String[]{"0", "511", "1023", "1535", "2047","2559","3071","3583"}).build());
//        imageTypes.add(ImageType.builder().name("2k_face").size("2048").ranges(new String[]{"0", "511", "1023", "1535"}).build());
//        imageTypes.add(ImageType.builder().name("1k_face").size("1024").ranges(new String[]{"0", "511"}).build());
//        imageTypes.add(ImageType.builder().name("512_face").size("512").ranges(new String[]{"0"}).build());
//    }

    @Value("${path.v4school}")
    private String v4localPath;
    @Value("${fyun.type:oss}")
    private String uploadType;
    @Value("${path.zip-local}")
    private String zipLocalFormat;
    @Value("${path.source-local}")
    private String sourceLocal;
    @Value("${fyun.bucket:4dkankan}")
    private String bucket;
    @Value("${download.config.public-url}")
    private String publicUrl;
    @Value("${path.v3school:#{null}}")
    private String v3localPath;
    @Value("${zip.nThreads}")
    private int zipNthreads;
    @Value("${download.config.resource-url}")
    private String resourceUrl;
    @Value("${path.zip-root}")
    private String wwwroot;
    @Value("${download.config.exe-content}")
    private String exeContent;
    @Value("${download.config.exe-content-v3:#{null}}")
    private String exeContentV3;
    @Value("${download.config.exe-name}")
    private String exeName;
    @Value("${path.zip-oss}")
    private String zipOssFormat;

    @Autowired
    private IScenePlusService scenePlusService;
    @Autowired
    private IScenePlusExtService scenePlusExtService;
    @Resource
    private FYunFileServiceInterface fYunFileService;
    @Autowired
    private RedisUtil redisUtil;


    @Override
    public void downloadHandler(String num) throws Exception {

        //zip包路径
        String zipPath = null;
        try {
            TimeInterval timer = DateUtil.timer();

            //删除资源目录
            FileUtil.del(String.format(this.sourceLocal, num, ""));

            ScenePlus scenePlus = scenePlusService.getByNum(num);
            if(Objects.isNull(scenePlus))
                throw new BusinessException(ErrorCode.FAILURE_CODE_5005);
            ScenePlusExt scenePlusExt = scenePlusExtService.getByPlusId(scenePlus.getId());
            String bucket = scenePlusExt.getYunFileBucket();

            Set<String> cacheKeys = new ConcurrentHashSet<>();

            Map<String, List<String>> allFiles = this.getAllFiles(num, v4localPath, bucket);
            List<String> ossFilePaths = allFiles.get("ossFilePaths");
            List<String> v4localFilePaths = allFiles.get("localFilePaths");

            //key总个数
            int total = ossFilePaths.size() + v4localFilePaths.size();
            AtomicInteger count = new AtomicInteger(0);

            //定义压缩包
            zipPath = String.format(this.zipLocalFormat, num);
            File zipFile = new File(zipPath);
            if(!zipFile.getParentFile().exists()){
                zipFile.getParentFile().mkdirs();
            }

            SceneViewInfoBean sceneViewInfo = this.getSceneJson(num);
            String resolution = sceneViewInfo.getSceneResolution();
            //国际版存在已经切好图的情况，下载时不需要再切图，只需要把文件直接下载下来打包就可以了
            if(SceneKind.FACE.code().equals(sceneViewInfo.getSceneKind())){
                resolution = "notNeadCut";
            }

            int imagesVersion = -1;
            Integer version = sceneViewInfo.getVersion();
            if(Objects.nonNull(version)){
                imagesVersion = version;
            }

            //固定文件写入
            this.zipLocalFiles(v4localFilePaths, v4localPath, num, count, total, "v4");
            log.info("打包固定文件耗时, num:{}, time:{}", num, timer.intervalRestart());

            //oss文件写入
            this.zipOssFiles(ossFilePaths, num, count, total, resolution, imagesVersion, cacheKeys, "v4");
            log.info("打包oss文件耗时, num:{}, time:{}", num, timer.intervalRestart());

            //重新写入scene.json（去掉密码访问设置）
            this.zipSceneJson(num, sceneViewInfo);

            //写入启动命令
            this.zipBat(num, "v4");

            //打压缩包
            ZipUtil.zip(String.format(this.sourceLocal, num, ""), zipPath);

            // TODO: 2024/1/4 生成的压缩包放哪里待定
//            String uploadPath = String.format(this.zipOssFormat, num);
//            fYunFileService.uploadFileByCommand(bucket, zipPath, uploadPath);

        }catch (Exception e){
            //更新进度为下载失败
            throw e;
        }finally {
            FileUtil.del(zipPath);
            FileUtil.del(String.format(this.sourceLocal, num, ""));
        }

    }

    private void zipBat(String num, String version) throws Exception{
        String batContent = String.format(this.exeContent, num);
        if("v3".equals(version)){
            batContent = String.format(this.exeContentV3, num);
        }
//        this.zipBytes(out, exeName, batContent.getBytes());
        FileUtil.writeUtf8String(batContent, String.format(this.sourceLocal, num, exeName));
    }

    private void zipSceneJson(String num, SceneViewInfoBean sceneViewInfo) throws Exception{
        //访问密码置0
        SceneEditControlsBean controls = sceneViewInfo.getControls();
        controls.setShowLock(CommonStatus.NO.code().intValue());
        String sceneJsonPath = String.format(UploadFilePath.DATA_VIEW_PATH, num) + "scene.json";
        FileUtil.writeUtf8String(JSON.toJSONString(sceneViewInfo, SerializerFeature.WriteNullStringAsEmpty, SerializerFeature.WriteNullNumberAsZero), String.format(this.sourceLocal, num, this.wwwroot + sceneJsonPath));
    }

    private void zipOssFiles(List<String> ossFilePaths, String num, AtomicInteger count,
                             int total, String resolution, int imagesVersion, Set<String> cacheKeys, String version) throws Exception{
        if(CollUtil.isEmpty(ossFilePaths)){
            return;
        }
        String imageNumPath = String.format(UploadFilePath.IMG_VIEW_PATH, num);
        if("v3".equals(version)){
            imageNumPath = String.format("images/images%s/", num);
        }
        ExecutorService executorService = Executors.newFixedThreadPool(this.zipNthreads);
        List<Future> futureList = new ArrayList<>();
        for (String filePath : ossFilePaths) {
            String finalImageNumPath = imageNumPath;
            Callable<Boolean> call = new Callable() {
                @Override
                public Boolean call() throws Exception {
                    zipOssFilesHandler(num, count, total, resolution,
                            imagesVersion, cacheKeys,filePath, finalImageNumPath, version);
                    return true;
                }
            };
            futureList.add(executorService.submit(call));
        }
        //这里一定要加阻塞，不然会导致oss文件还没打包好，主程序已经结束返回了
        Boolean zipSuccess = true;
        for (Future future : futureList) {
            try {
                future.get();
            }catch (Exception e){
                log.error("打包oss文件失败", e);
                zipSuccess = false;
            }
        }
        if(!zipSuccess){
            throw new Exception("打包oss文件失败");
        }
    }

    private void zipOssFilesHandler(String num,
                                    AtomicInteger count, int total, String resolution,
                                    int imagesVersion, Set<String> cacheKeys,
                                    String filePath, String imageNumPath, String version) throws Exception{

        if(filePath.endsWith("/")){
            return;
        }

        //某个目录不需要打包
        if(filePath.contains(imageNumPath + "panorama/panorama_edit/"))
            return;

        //切图
        if(!"notNeadCut".equals(resolution)){
            if((filePath.contains(imageNumPath + "panorama/") && filePath.contains("tiles/" + resolution))
                    || filePath.contains(imageNumPath + "tiles/" + resolution + "/")) {
                this.processImage(num, filePath, resolution, imagesVersion, cacheKeys);
                return;
            }
        }

        //其他文件打包
        this.ProcessFiles(num, filePath, this.wwwroot, cacheKeys);

    }

    public void ProcessFiles(String num, String key, String prefix, Set<String> cacheKeys) throws Exception{
        if(cacheKeys.contains(key)){
            return;
        }
        if(key.equals(String.format(UploadFilePath.DATA_VIEW_PATH, num) + "scene.json")){
            return;
        }
        cacheKeys.add(key);
        String fileName = key.substring(key.lastIndexOf("/") + 1);
        String url = this.resourceUrl + key.replace(fileName, URLEncoder.encode(fileName, "UTF-8")) + "?t=" + Calendar.getInstance().getTimeInMillis();
        if(key.contains("hot.json") || key.contains("link-scene.json")){
            String content = fYunFileService.getFileContent(key);
            if(StrUtil.isEmpty(content)){
                return;
            }
            content = content.replace(publicUrl, "")
//                .replace(publicUrl+"v3/", "")
                    .replace("https://spc.html","spc.html")
                    .replace("https://smobile.html", "smobile.html");

            FileUtil.writeUtf8String(content, String.format(sourceLocal, num, prefix + key));
        }else{
            try {
                this.downloadFile(url, String.format(sourceLocal, num, prefix + key));
            }catch (Exception e){
                log.info("下载文件报错，path:{}", String.format(sourceLocal, num, prefix + key));
            }
        }
    }

    private void processImage(String sceneNum, String key, String resolution, int imagesVersion, Set<String> imgKeys) throws Exception{

        if(key.contains("x-oss-process") || key.endsWith("/")){
            return;
        }

        String fileName = key.substring(key.lastIndexOf("/")+1, key.indexOf("."));//0_skybox0.jpg
        String ext = key.substring(key.lastIndexOf("."));
        String[] arr = fileName.split("_skybox");
        String dir = arr[0]; //0
        String num = arr[1]; //0
        if(StrUtil.isEmpty(fileName)
                || StrUtil.isEmpty(ext)
                || (".jpg".equals(ext) && ".png".equals(ext))
                ||  StrUtil.isEmpty(dir)
                || StrUtil.isEmpty(num)){
            throw new Exception("本地下载图片资源不符合规则，key：" + key);
        }
        for (ImageType imageType : CommonConstant.imageTypes) {

            if(imageType.getName().equals("4k_face") && !"4k".equals(resolution)){
                continue;
            }

//            imageTypes.add(ImageType.builder().name("4k_face").size("4096").ranges(new String[]{"0", "511", "1023", "1535", "2047","2559","3071","3583"}).build());
//            imageTypes.add(ImageType.builder().name("2k_face").size("2048").ranges(new String[]{"0", "511", "1023", "1535"}).build());
//            imageTypes.add(ImageType.builder().name("1k_face").size("1024").ranges(new String[]{"0", "511"}).build());
//            imageTypes.add(ImageType.builder().name("512_face").size("512").ranges(new String[]{"0"}).build());

            List<ImageTypeDetail> items = Lists.newArrayList();
            String[] ranges = imageType.getRanges();
            for(int i = 0; i < ranges.length; i++){
                String x = ranges[i];
                for(int j = 0; j < ranges.length; j++){
                    String y = ranges[j];
                    items.add(
                            ImageTypeDetail.builder()
                                    .i(String.valueOf(i))
                                    .j(String.valueOf(j))
                                    .x(x)
                                    .y(y)
                                    .build()
                    );
                }
            }
            for (ImageTypeDetail item : items) {
                String par = "?x-oss-process=image/resize,m_lfit,w_" + imageType.getSize() + "/crop,w_512,h_512,x_" + item.getX() + ",y_" + item.getY();
                if(FYunTypeEnum.AWS.code().equals(uploadType)){
                    par += "&imagesVersion="+ imagesVersion;
                }

                var url = this.resourceUrl + key;
                FYunTypeEnum storageType = FYunTypeEnum.get(uploadType);
                switch (storageType){
                    case OSS:
                        url += par;
                        break;
                    case AWS:
                        url += URLEncoder.encode(par.replace("/", "@"), "UTF-8");
                        break;
                }
                //scene_view_data/t-jp-WXWxmOuj4Kf/images/tiles/0/4k_face_0_0_0.jpg
                var fky = key.split("/" + resolution + "/")[0] + "/" + dir + "/" + imageType.getName() +  num + "_" + item.getI()  + "_" + item.getJ() + ext;
                if(imgKeys.contains(fky)){
                    continue;
                }
                imgKeys.add(fky);
                this.downloadFile(url, String.format(sourceLocal, sceneNum, this.wwwroot + fky));
            }

        }

    }

    public void downloadFile(String url, String path){
        File file = new File(path);
        if(!file.getParentFile().exists()){
            file.getParentFile().mkdirs();
        }
        HttpUtil.downloadFile(url, path);
    }

    private void zipLocalFiles(List<String> localFilePaths, String v3localPath, String num, AtomicInteger count, int total, String version) throws Exception{
        String sourcePath = String.format(this.sourceLocal, num, "");
        String localPath = "v4".equals(version) ? this.v4localPath : this.v3localPath;
        for (String localFilePath : localFilePaths) {
            try (FileInputStream in = new FileInputStream(new File(localFilePath));){
                FileUtil.copy(localFilePath, localFilePath.replace(localPath, sourcePath), true);
            }catch (Exception e){
                throw e;
            }
        }
        //写入code.txt
        FileUtil.writeUtf8String(num, String.format(sourceLocal, num, "code.txt"));
    }

    private SceneViewInfoBean getSceneJson(String num){
        String sceneJsonData = redisUtil.get(String.format(RedisKey.SCENE_JSON, num));
        if(StrUtil.isEmpty(sceneJsonData)){
            sceneJsonData = fYunFileService.getFileContent(bucket, String.format(UploadFilePath.DATA_VIEW_PATH, num) + "scene.json");
        }
        sceneJsonData = sceneJsonData.replace(this.publicUrl, "");
        SceneViewInfoBean sceneInfoVO = JSON.parseObject(sceneJsonData, SceneViewInfoBean.class);
        sceneInfoVO.setScenePassword(null);
        if(Objects.isNull(sceneInfoVO.getFloorPlanAngle())){
            sceneInfoVO.setFloorPlanAngle(0f);
        }
        if(Objects.isNull(sceneInfoVO.getFloorPlanCompass())){
            sceneInfoVO.setFloorPlanCompass(0f);
        }
        SceneEditControlsBean controls = sceneInfoVO.getControls();
        if(Objects.isNull(controls.getShowShare())){
            controls.setShowShare(CommonStatus.YES.code().intValue());
        }
        if(Objects.isNull(controls.getShowCapture())){
            controls.setShowCapture(CommonStatus.YES.code().intValue());
        }
        if(Objects.isNull(controls.getShowBillboardTitle())){
            controls.setShowBillboardTitle(CommonStatus.YES.code().intValue());
        }

        return sceneInfoVO;
    }

    private Map<String, List<String>> getAllFiles(String num, String v4localPath, String bucket) throws Exception{
        //列出oss所有文件路径
        List<String> ossFilePaths = new ArrayList<>();
        for (String prefix : CommonConstant.prefixArr) {
            prefix = String.format(prefix, num);
            List<String> keys = fYunFileService.listRemoteFiles(bucket, prefix);
            if(CollUtil.isEmpty(keys)){
                continue;
            }
            if(FYunTypeEnum.AWS.code().equals(this.uploadType)){
                keys = keys.stream().filter(key->{
                    if(key.contains("x-oss-process")){
                        return false;
                    }
                    return true;
                }).collect(Collectors.toList());
            }
            ossFilePaths.addAll(keys);
        }

        //列出v3local所有文件路径
        File file = new File(v4localPath);
        List<String> localFilePaths = FileUtils.list(file);

        HashMap<String, List<String>> map = new HashMap<>();
        map.put("ossFilePaths", ossFilePaths);
        map.put("localFilePaths", localFilePaths);

        return map;
    }
}