package com.bw.translate.handler;

import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.concurrent.LinkedBlockingDeque;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

import org.apache.commons.io.FileUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

import com.alibaba.fastjson.JSONObject;
import com.bw.translate.cache.ConfigCache;
import com.bw.translate.service.TranslateTaskService;
import com.bw.translate.utils.FileUtil;

import lombok.extern.slf4j.Slf4j;


/**
 * @author jian.mao
 * @date 2025年1月13日
 * @description 
 */
@Component
@Order(value = 1)
@RefreshScope
@Slf4j
public class MainHandler implements ApplicationRunner {

    @Value("${task.task-queue-path}")
    private String taskPath;
    @Autowired
    private TranslateTaskService translateTaskService;
    /***线程池参数***/
    @Value("${threadPool.corePoolSize}")
    private int corePoolSize;
    @Value("${threadPool.maximumPoolSize}")
    private int maximumPoolSize;
    @Value("${threadPool.keepAliveTime}")
    private long keepAliveTime;
    @Value("${threadPool.queueSize}")
    private int queueSize;
    
    /**
     *执行入口
     */
    @Override
    public void run(ApplicationArguments args) throws Exception {
        //线程池方式
        ThreadPoolExecutor executor = new ThreadPoolExecutor(
        		corePoolSize,
        		maximumPoolSize, 
        		keepAliveTime, 
                TimeUnit.SECONDS, 
                new LinkedBlockingQueue<>(queueSize),
                new ThreadPoolExecutor.CallerRunsPolicy()
        );
        //消费创建任务队列数据
        Thread consumerThread = new Thread(() -> {
            while (true) {
                try {
                    // 从队列中获取任务
                    Map<String, Object> task = ConfigCache.taskQueue.take();
                    // 提交给线程池执行
                    executor.execute(() -> translateTask(task)); 
                } catch (InterruptedException e) {
                	// 恢复中断状态
                    Thread.currentThread().interrupt(); 
                    log.error("任务消费线程被中断");
                    break;
                }
            }
        });
        consumerThread.start();
        log.info("任务消费线程启动-----");
        
        //启动加载缓存任务
        readTask(taskPath, ConfigCache.taskQueue);
        //停止处理
        waitDown();
    }

    /**
     * 创建任务执行方法
     * @param task
     */
    private void translateTask(Map<String, Object> task) {
    	translateTaskService.translate(task);
    }
    
    
    
    /****************************************************************load******************************************************************************/
    /**
     * 加载文件中的任务
     * @param path 文件地址
     * @param queue 队列
     */
    @SuppressWarnings("unchecked")
    public static void readTask(String path, LinkedBlockingDeque<Map<String, Object>> queue) {
        File file = new File(path);
        if (file.exists()) {
            List<String> tasks = null;
            try {
                tasks = FileUtils.readLines(file, "UTF-8");
            } catch (IOException e) {
                e.printStackTrace();
            }
            for (String taskStr : tasks) {
                Map<String, Object> task = JSONObject.parseObject(taskStr);
                try {
                    queue.put(task);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
            file.delete();
        }
    }

    /*******************************************************************stop************************************************************************/
    
    /**
     * 结束触发钩子
     */
    public void waitDown() {
        Runtime.getRuntime().addShutdownHook(new Thread() {
            @Override
            public void run() {
                // 停止线程
                ConfigCache.isStart = false;
                log.info("stop-------");
                writeTsskToFile();
            }
        });
    }


    /**
     * 任务持久化到硬盘
     */
    public void writeTsskToFile() {
        while (true) {
            if (ConfigCache.taskQueue.size() > 0) {
                try {
                    Map<String, Object> task = ConfigCache.taskQueue.take();
                    FileUtil.writeFile(taskPath, JSONObject.toJSONString(task));
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            } else {
                log.info("taskQueue write is file end");
                break;
            }
        }
    }
}