package foundation.io.define;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import foundation.dao.DataPackage;
import foundation.data.meta.MetaMonitor;
import foundation.data.meta.ReloadCheckResult;
import foundation.io.IOLoader;
import foundation.io.mapping.IOMappings;
import foundation.util.MapList;
import foundation.util.Util;

public class DataIOContainer {

	protected static Logger logger;
	public static boolean Debug = true;
    private static DataIOContainer instance;
    private static Object locker = new Object();

    private MapList<String, IOTask> taskList;
    private MapList<String, IOMappings> mappingsList;
    private MetaMonitor ioMonitor;
    private MetaMonitor mappingsMonitor;
    
	static {
		logger = LogManager.getLogger(DataPackage.class);
	}
	
	private DataIOContainer() {
		taskList = new MapList<String, IOTask>();
        mappingsList = new MapList<String, IOMappings>();
    	ioMonitor = new MetaMonitor("getIOTaskLastUpdateTime");
    	mappingsMonitor = new MetaMonitor("getMappingListByParentId");
    }

    public static DataIOContainer getInstance() {
        if (instance == null) {
            synchronized (locker) {
           	 if (instance == null) {
                    instance = new DataIOContainer();
                }
            } 
        }

        return instance;
    }
    
    public IOTask getIOTask(String name) throws Exception {
    	if (Util.isEmpty(name)) {
    		return null;
    	}
    	
    	synchronized (this) {
    		ioMonitor.setParam("taskName", name);
    		ReloadCheckResult checkResult = ioMonitor.getReloadCheckResult();
    	
    		if (checkResult.isNeedReload()) {
				reloadIOTask(name);
			}
		}
		
        IOTask ioTask = taskList.get(name);
        return ioTask;
    }
    
    public IOMappings getIOMappings(String name) throws Exception {
    	if (Util.isEmpty(name)) {
    		return new IOMappings(IOSource.AutoCreate);
    	}
    	
    	synchronized (this) {
    		mappingsMonitor.setParam("mappingId", name);
    		ReloadCheckResult checkResult = mappingsMonitor.getReloadCheckResult();
    	
    		if (checkResult.isNeedReload()) {
				reloadIOMappings(name);
			}
		}
    	
    	IOMappings mappings = mappingsList.get(name);
    	
    	if (mappings == null) {
    		mappings = new IOMappings(IOSource.AutoCreate);
    	}
    	
        return mappings;
    }
    
    private IOTask reloadIOTask(String name) throws Exception {
        IOTask ioTask = taskList.get(name);
        
        ioTask = IOLoader.loadOneIOTask(name, ioTask);
        taskList.set(name, ioTask);
        
        return ioTask;
    }
    
	private IOMappings reloadIOMappings(String name) throws Exception {
	   	IOMappings mappings = mappingsList.get(name);
	   	
	   	mappings = IOLoader.loadOneIOMappings(name, mappings);
	   	mappingsList.set(name, mappings);
	   	
        return mappings;
	}

    public void clear() {
    	taskList.clear();
        mappingsList.clear();
    }

}