package com.iplatform.file;

import com.iplatform.base.PlatformRuntimeException;
import com.iplatform.file.util.FileStoreUtils;
import com.walker.file.FileInfo;
import com.walker.file.FileOperateEngine;
import com.walker.file.FileOperateException;
import com.walker.file.FileStoreType;
import com.walker.infrastructure.arguments.ArgumentsManager;
import com.walker.infrastructure.arguments.Variable;
import com.walker.infrastructure.core.ApplicationBeanInitialized;
import com.walker.infrastructure.utils.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 文件管理引擎工厂，提供不同实现上传调用。
 * @author 时克英
 * @date 2023-02-14
 */
public class FileEngineFactory implements ApplicationBeanInitialized {

    protected final transient Logger logger = LoggerFactory.getLogger(this.getClass());

    /**
     * 下载oss文件
     * @param fileStoreType
     * @param id 文件唯一编号
     * @return
     * @date 2023-12-13
     */
    public byte[] downloadOssFile(FileStoreType fileStoreType, String id){
        try {
            return this.fileOperateEngineMap.get(fileStoreType).downloadFile(id);
        } catch (FileOperateException e) {
            throw new PlatformRuntimeException("下载oss文件错误：" + e.getMessage() + ", id=" + id, e);
        }
    }

    /**
     * 根据文件ID，返回文件对象。
     * @param id
     * @return
     * @date 2023-02-15
     */
    public FileInfo getFileInfo(String id) {
        return this.fileOperateEngineMap.get(FileStoreType.FileSystem).getFileInfo(id);
    }

    /**
     * 根据文件ID集合，返回文件对象集合。
     * <p>注意：其实哪个引擎都可以根据 id 返回文件信息，这里随便选一个就行。</p>
     * @param ids
     * @return
     * @date 2023-02-15
     * @date 2023-08-01 更新注释
     */
    public List<FileInfo> getFileInfoList(List<String> ids) {
        return this.fileOperateEngineMap.get(FileStoreType.FileSystem).getFileInfoList(ids);
    }

    /**
     * 上传一个文件到系统磁盘。
     * @param inputStream 文件输入流
     * @param fileName 文件名字，不包含路径，如: demo.txt
     * @param groupId 分组ID，即: 业务id，可选
     * @return
     * @throws FileOperateException
     */
    @Deprecated
    public FileInfo uploadFileToSystem(InputStream inputStream, String fileName, String groupId, long fileSize) throws FileOperateException{
        return this.uploadFile(FileStoreType.FileSystem, inputStream, fileName, groupId, fileSize);
    }

    /**
     * 上传文件到系统本地。
     * @param inputStream
     * @param fileName
     * @param groupId
     * @param fileSize
     * @param businessType
     * @param owner
     * @return
     * @throws FileOperateException
     * @date 2023-06-09
     */
    public FileInfo uploadFileToLocal(InputStream inputStream, String fileName, String groupId
            , long fileSize, Integer businessType, String owner) throws FileOperateException{
        return this.uploadFile(FileStoreType.FileSystem, inputStream, fileName, groupId, fileSize, businessType, owner);
    }
    public FileInfo[] uploadFileToLocal(InputStream[] inputStream, String[] fileName, String groupId
            , long[] fileSize, Integer businessType, String owner) throws FileOperateException{
        return this.uploadFile(FileStoreType.FileSystem, inputStream, fileName, groupId, fileSize, businessType, owner);
    }

    /**
     * 上传一个文件到FTP。
     * @param inputStream 文件输入流
     * @param fileName 文件名字，不包含路径，如: demo.txt
     * @param groupId 分组ID，即: 业务id，可选
     * @return
     * @throws FileOperateException
     */
    @Deprecated
    public FileInfo uploadFileToFtp(InputStream inputStream, String fileName, String groupId, long fileSize) throws FileOperateException{
        return this.uploadFile(FileStoreType.Ftp, inputStream, fileName, groupId, fileSize);
    }

    /**
     * 上传一个文件到FTP，这是新方法。
     * @param inputStream
     * @param fileName
     * @param groupId
     * @param fileSize
     * @param businessType
     * @param owner
     * @return
     * @throws FileOperateException
     * @date 2023-06-09
     */
    public FileInfo uploadFileToFtp(InputStream inputStream, String fileName, String groupId
            , long fileSize, Integer businessType, String owner) throws FileOperateException{
        if(this.remoteAsLocal){
            // 2023-07-03
            return this.uploadFile(FileStoreType.FileSystem, inputStream, fileName, groupId, fileSize, businessType, owner);
        } else {
            return this.uploadFile(FileStoreType.Ftp, inputStream, fileName, groupId, fileSize, businessType, owner);
        }
    }
    public FileInfo[] uploadFileToFtp(InputStream[] inputStream, String[] fileName, String groupId
            , long[] fileSize, Integer businessType, String owner) throws FileOperateException{
        if(this.remoteAsLocal){
            // 2023-07-03
            return this.uploadFile(FileStoreType.FileSystem, inputStream, fileName, groupId, fileSize, businessType, owner);
        } else {
            return this.uploadFile(FileStoreType.Ftp, inputStream, fileName, groupId, fileSize, businessType, owner);
        }
    }

    /**
     * 上传文件到第三方 OSS 系统。
     * @param inputStream
     * @param fileName 文件名字，不包含路径，如: demo.txt
     * @param groupId
     * @param fileSize
     * @param businessType 业务类型（PID）
     * @param owner 数据归属（商户ID），如果平台则为：-1
     * @param fileStoreType
     * @return
     * @throws FileOperateException
     * @date 2023-06-09
     */
    public FileInfo uploadFileToOss(InputStream inputStream, String fileName, String groupId
            , long fileSize, Integer businessType, String owner, FileStoreType fileStoreType) throws FileOperateException{
        if(fileStoreType != FileStoreType.OssQiNiu
                && fileStoreType != FileStoreType.OssTx && fileStoreType != FileStoreType.OssAli
                && fileStoreType != FileStoreType.OssAws){
            throw new UnsupportedOperationException("不支持的OSS类型：" + fileStoreType);
        }
        if(this.remoteAsLocal){
            // 2023-07-03
            return this.uploadFile(FileStoreType.FileSystem, inputStream, fileName, groupId, fileSize, businessType, owner);
        } else {
            return this.uploadFile(fileStoreType, inputStream, fileName, groupId, fileSize, businessType, owner);
        }
    }
    public FileInfo[] uploadFileToOss(InputStream[] inputStream, String[] fileName, String groupId
            , long[] fileSize, Integer businessType, String owner, FileStoreType fileStoreType) throws FileOperateException{
        if(fileStoreType != FileStoreType.OssQiNiu
                && fileStoreType != FileStoreType.OssTx && fileStoreType != FileStoreType.OssAli
                && fileStoreType != FileStoreType.OssAws){
            throw new UnsupportedOperationException("不支持的OSS类型：" + fileStoreType);
        }
        if(this.remoteAsLocal){
            // 2023-07-03
            return this.uploadFile(FileStoreType.FileSystem, inputStream, fileName, groupId, fileSize, businessType, owner);
        } else {
            return this.uploadFile(fileStoreType, inputStream, fileName, groupId, fileSize, businessType, owner);
        }
    }

    /**
     * 上传一个文件。
     * @param fileStoreType 文件存储类型，见: FileStoreType
     * @param inputStream 文件输入流
     * @param fileName 文件名字，不包含路径，如: demo.txt
     * @param groupId 分组ID，即: 业务id，可选
     * @return
     * @throws FileOperateException
     */
    @Deprecated
    public FileInfo uploadFile(FileStoreType fileStoreType
            , InputStream inputStream, String fileName, String groupId, long fileSize) throws FileOperateException{
        FileOperateEngine fileOperateEngine = this.fileOperateEngineMap.get(fileStoreType);
        if(fileOperateEngine == null){
            throw new IllegalArgumentException("未找到对应的文件引擎，fileStoreType=" + fileStoreType);
        }
//        return fileOperateEngine.uploadFile(inputStream, fileName, groupId, fileSize);
        return fileOperateEngine.uploadFile(inputStream, fileName, groupId, fileSize);
    }

    public FileInfo uploadFile(FileStoreType fileStoreType
            , InputStream inputStream, String fileName, String groupId, long fileSize
            , Integer businessType, String owner) throws FileOperateException{
        FileOperateEngine fileOperateEngine = this.fileOperateEngineMap.get(fileStoreType);
        if(fileOperateEngine == null){
            throw new IllegalArgumentException("未找到对应的文件引擎，fileStoreType=" + fileStoreType);
        }
//        return fileOperateEngine.uploadFile(inputStream, fileName, groupId, fileSize);
        return fileOperateEngine.uploadFile(inputStream, fileName, groupId, fileSize, businessType, owner);
    }

    public FileInfo[] uploadFile(FileStoreType fileStoreType
            , InputStream[] inputStream, String[] fileName, String groupId, long[] fileSize
            , Integer businessType, String owner) throws FileOperateException{
        FileOperateEngine fileOperateEngine = this.fileOperateEngineMap.get(fileStoreType);
        if(fileOperateEngine == null){
            throw new IllegalArgumentException("未找到对应的文件引擎，fileStoreType=" + fileStoreType);
        }
        return fileOperateEngine.uploadFile(inputStream, fileName, groupId, fileSize, businessType, owner);
    }

    public void register(FileStoreType fileStoreType, FileOperateEngine fileOperateEngine){
        if(fileStoreType == null || fileOperateEngine == null){
            throw new IllegalArgumentException("错误：注册 '文件管理引擎' 为空。");
        }
        this.fileOperateEngineMap.put(fileStoreType, fileOperateEngine);
    }

    private Map<FileStoreType, FileOperateEngine> fileOperateEngineMap = new HashMap<>(4);

    @Override
    public void startup() {
        String fileUrlPrefixConfig = this.getFileUrlPrefix(FileStoreType.FileSystem.getIndex());
        if(StringUtils.isNotEmpty(fileUrlPrefixConfig)){
            FileStoreUtils.fileStoreTypeUrlPrefix.put(FileStoreType.FileSystem.getIndex(), fileUrlPrefixConfig);
        }
        fileUrlPrefixConfig = this.getFileUrlPrefix(FileStoreType.Ftp.getIndex());
        if(StringUtils.isNotEmpty(fileUrlPrefixConfig)){
            FileStoreUtils.fileStoreTypeUrlPrefix.put(FileStoreType.Ftp.getIndex(), fileUrlPrefixConfig);
        }
        fileUrlPrefixConfig = this.getFileUrlPrefix(FileStoreType.OssQiNiu.getIndex());
        if(StringUtils.isNotEmpty(fileUrlPrefixConfig)){
            FileStoreUtils.fileStoreTypeUrlPrefix.put(FileStoreType.OssQiNiu.getIndex(), fileUrlPrefixConfig);
        }
        fileUrlPrefixConfig = this.getFileUrlPrefix(FileStoreType.OssTx.getIndex());
        if(StringUtils.isNotEmpty(fileUrlPrefixConfig)){
            FileStoreUtils.fileStoreTypeUrlPrefix.put(FileStoreType.OssTx.getIndex(), fileUrlPrefixConfig);
        }
        fileUrlPrefixConfig = this.getFileUrlPrefix(FileStoreType.OssAli.getIndex());
        if(StringUtils.isNotEmpty(fileUrlPrefixConfig)){
            FileStoreUtils.fileStoreTypeUrlPrefix.put(FileStoreType.OssAli.getIndex(), fileUrlPrefixConfig);
        }
    }

    /**
     * 返回文件存储不同方式，对应的文件URL前缀。
     * @param fileStoreType
     * @return
     */
    private String getFileUrlPrefix(String fileStoreType){
        logger.info("setup fileStoreType = {}", fileStoreType);
        String fileUrlKey = FileStoreUtils.getFileUrlPrefixKey(fileStoreType);
        if(StringUtils.isEmpty(fileUrlKey)){
            logger.error("fileUrlKey为空，该文件存储类型无法获取配置，fileStoreType = " + fileStoreType);
            return null;
        }
        Variable var = this.argumentsManager.getVariable(fileUrlKey);
        if(var == null){
//            throw new IllegalStateException("variable未找到，key = " + fileUrlKey);
            logger.error("argumentsManager获取参数为空! fileUrlKey=" + fileUrlKey);
            return null;
        }
        return var.getStringValue();
    }

    public void setArgumentsManager(ArgumentsManager argumentsManager) {
        this.argumentsManager = argumentsManager;
    }

    /**
     * 是否在调用远程存储方法时，按照本地方式存储，如果设置：true 则存储到本地（一般测试没有FTP、OSS环境时这样使用）
     * @param remoteAsLocal
     * @date 2023-07-03
     */
    public void setRemoteAsLocal(boolean remoteAsLocal) {
        this.remoteAsLocal = remoteAsLocal;
    }

    private boolean remoteAsLocal = true;
    private ArgumentsManager argumentsManager;
}