package com.shkpr.service.alambizplugin.bizservice;

import com.global.base.log.LogLevelFlag;
import com.global.base.log.LogPrintMgr;
import com.shkpr.service.alambizplugin.apiparam.GisSurveyThirdImportParams;
import com.shkpr.service.alambizplugin.commproperties.AsyncTaskProperties;
import com.shkpr.service.alambizplugin.components.GisSurveyThirdImporter;
import com.shkpr.service.alambizplugin.constants.GisSurveyImportStatusEnum;
import com.shkpr.service.alambizplugin.constants.LogFlagBusiType;
import com.shkpr.service.alambizplugin.dto.CommAsyncCache;
import com.shkpr.service.alambizplugin.dto.GisSurveyThirdImportResult;
import com.shkpr.service.alambizplugin.dto.GisSurveyThirdImportSubtask;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
import org.springframework.stereotype.Component;
import org.springframework.util.concurrent.ListenableFuture;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.io.InputStream;
import java.time.Instant;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ExecutionException;

/**
 * 第三方导入管理service
 *
 * @author 欧阳劲驰
 * @since 1.0.0
 */
@Component
public class GisSurveyThirdImportBizService {
    /**
     * 任务缓存
     */
    private final static Map<String, ListenableFuture<GisSurveyThirdImportResult>> TASK_CACHE = new ConcurrentHashMap<>();
    /**
     * 子任务缓存
     */
    private final static Map<String, GisSurveyThirdImportSubtask> SUBTASK_CACHE = new ConcurrentHashMap<>();
    /**
     * 开始时间缓存
     */
    private final static Map<String, CommAsyncCache> INFO_CACHE = new ConcurrentHashMap<>();
    /**
     * log
     */
    private final String mStrClassName;
    private final String mBizType;

    private final AsyncTaskProperties asyncTaskProperties;
    private final ThreadPoolTaskScheduler taskScheduler;
    private final GisSurveyThirdImporter thirdImporter;


    public GisSurveyThirdImportBizService(AsyncTaskProperties asyncTaskProperties
            , @Qualifier("timeThreadPoolTaskScheduler") ThreadPoolTaskScheduler taskScheduler
            , GisSurveyThirdImporter thirdImporter) {
        mStrClassName = "GisSurveySystemCheckBizService";
        mBizType = LogFlagBusiType.BUSI_GIS_SURVEY.toStrValue();
        this.asyncTaskProperties = asyncTaskProperties;
        this.taskScheduler = taskScheduler;
        this.thirdImporter = thirdImporter;
    }

    /**
     * 第三方导入
     *
     * @param params 第三方导入参数
     * @return 导入状态
     */
    public GisSurveyThirdImportResult thirdImport(GisSurveyThirdImportParams params) {
        //获取结果
        GisSurveyThirdImportResult result = getResult(params);
        if (result != null) return result;

        //获取文件流
        List<InputStream> inputStreams = new ArrayList<>();
        for (MultipartFile file : params.getFiles()) {
            try {
                inputStreams.add(file.getInputStream());
            } catch (IOException e) {
                return GisSurveyThirdImportResult.fail(params);
            }
        }
        //启动检查任务
        startTask(params, inputStreams);
        //返回进行中
        return GisSurveyThirdImportResult.inProgress(params, SUBTASK_CACHE.get(params.getJobId()),
                LocalDateTime.now(),
                params.getOperator()
        );
    }

    /**
     * 获取结果
     *
     * @param params 第三方导入参数
     * @return 导入结果
     */
    public GisSurveyThirdImportResult getResult(GisSurveyThirdImportParams params) {
        //获取已存在的任务
        ListenableFuture<GisSurveyThirdImportResult> previousFuture = TASK_CACHE.get(params.getJobId());
        //判断完成
        if (previousFuture != null && previousFuture.isDone()) {
            try {
                //获取结果
                GisSurveyThirdImportResult thirdImportResult = previousFuture.get();
                //如不忽略失败,且失败,则返回失败
                if (!params.getIgnoreFail() && Objects.equals(thirdImportResult.getImportStatus(), GisSurveyImportStatusEnum.FAIL.getCode()))
                    return thirdImportResult;
                else if (Objects.equals(thirdImportResult.getImportStatus(), GisSurveyImportStatusEnum.SUCCESS.getCode()) ||
                        Objects.equals(thirdImportResult.getImportStatus(), GisSurveyImportStatusEnum.DATA_ERROR.getCode())) {
                    //如处理成功(导入成功或数据检查成功),返回成功,并清除缓存
                    removeCache(params.getJobId());
                    return thirdImportResult;
                }
            } catch (InterruptedException | ExecutionException e) {
                //打印报错信息
                LogPrintMgr.getInstance().printLogMsg(LogLevelFlag.LOG_ERROR, mBizType, mStrClassName
                        , String.format("检查历史失败异常 任务id:%s msg:%s", params.getJobId(), e.getMessage())
                );
                return GisSurveyThirdImportResult.fail(params);
            }
        }

        //进行中判断(未完成且未清除)
        if (previousFuture != null && !previousFuture.isDone() && !previousFuture.isCancelled()) {
            CommAsyncCache asyncCache = INFO_CACHE.get(params.getJobId());
            if (asyncCache != null)
                return GisSurveyThirdImportResult.inProgress(params,
                        SUBTASK_CACHE.get(params.getJobId()),
                        asyncCache.getStartTime(), asyncCache.getOperator()
                );
        }

        return null;
    }

    /**
     * 取消导入
     *
     * @param jobId 任务id
     * @return 取消结果
     */
    public int cancelImport(String jobId) {
        //如无缓存,则直接返回不存在
        if (!TASK_CACHE.containsKey(jobId)) return GisSurveyImportStatusEnum.NOT_EXISTS.getCode();
        //关闭检查任务
        if (stopTask(TASK_CACHE.get(jobId))) {
            removeCache(jobId);

            LogPrintMgr.getInstance().printLogMsg(LogLevelFlag.LOG_INFO, mBizType, mStrClassName
                    , String.format(
                            "第三方导入停止成功,清除缓存;任务id: %s"
                            , jobId
                    )
            );
            return GisSurveyImportStatusEnum.SUCCESS.getCode();
        }
        return GisSurveyImportStatusEnum.FAIL.getCode();
    }

    /**
     * 启动任务
     *
     * @param params       导入参数
     * @param inputStreams 文件输入流
     */
    private void startTask(GisSurveyThirdImportParams params, List<InputStream> inputStreams) {
        String jobId = params.getJobId();
        //获取已存在的任务
        ListenableFuture<GisSurveyThirdImportResult> previousFuture = TASK_CACHE.get(jobId);
        //已结束判断,删除缓存
        if (previousFuture != null && (previousFuture.isDone() || previousFuture.isCancelled()))
            removeCache(params.getJobId());
        //异步执行第三方导入查任务
        ListenableFuture<GisSurveyThirdImportResult> future = thirdImporter.thirdImportTask(params, inputStreams,
                //缓存子任务句柄
                subtask -> SUBTASK_CACHE.put(jobId, subtask),
                //删除子任务句柄
                subtaskSystemCheckId -> SUBTASK_CACHE.remove(jobId)
        );
        //任务超时
        taskScheduler.schedule(() -> {
            if (!future.isCancelled() && !future.isDone() && stopTask(future)) {
                removeCache(jobId);
                LogPrintMgr.getInstance().printLogMsg(LogLevelFlag.LOG_INFO, mBizType, mStrClassName
                        , String.format(
                                "第三方导入超时,成功停止任务;任务id: %s"
                                , jobId
                        )
                );
            }
        }, Instant.now().plusMillis(asyncTaskProperties.getThirdImportTimeout().toMillis()));
        //缓存任务句柄
        TASK_CACHE.put(jobId, future);
        //缓存时间
        INFO_CACHE.put(jobId, new CommAsyncCache(LocalDateTime.now(), params.getOperator()));
    }

    /**
     * 停止任务
     *
     * @param future 任务
     * @return 关闭状态
     */
    private Boolean stopTask(ListenableFuture<?> future) {
        //完成判断,完成删除缓存
        if (future.isCancelled() || future.isDone()) return true;
        //尝试清除任务
        return future.cancel(true);
    }

    /**
     * 清除缓存
     *
     * @param jobId 任务id
     */
    private void removeCache(String jobId) {
        TASK_CACHE.remove(jobId);
        SUBTASK_CACHE.remove(jobId);
        INFO_CACHE.remove(jobId);
    }
}