package chat.server;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.Properties;

import org.apache.log4j.Logger;


public class ConfigerLoader {

	protected static Logger logger;
	private static ConfigerLoader instance;
	private Properties properties;

	static {
		logger = Logger.getLogger(ConfigerLoader.class);
	}

	private ConfigerLoader() {
		properties = new Properties();
	}

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

		return instance;
	}
	
	public static void staticLoad() throws Exception {
		getInstance();
		instance.load();
	}

	public void load() throws Exception {
		String path = Configer.getPath_MainConfig();
		File file = new File(path);

		loadOneFile(file);
	}

	private void loadOneFile(File file) throws Exception {
		try {
			logger.debug("load config file:" + file);
			
	        BufferedReader reader = new BufferedReader(new FileReader(file));
	        try {
		        String line;
		        
		        while ((line = reader.readLine()) != null) {
		        	if (line.startsWith("#")) {
		        		continue;
		        	}
		        	
	                if (line.isEmpty() || line.matches("^\\s*$")) {
	                    continue;
	                }
	                
	                int delimiterIdx = line.indexOf(' ');
	                String key; String value = "";
	                
	                if (delimiterIdx > 0) {
	                    key = line.substring(0, delimiterIdx).trim();
	                    value = line.substring(delimiterIdx).trim();
	                } else {
	                    key = line.trim();
	                }

	                properties.put(key, value);
		        }        	
	        }
	        finally {
	        	reader.close();
	        }
		} 
		catch (Exception e) {
			logger.error("can not load dispatch file: " + file);
			logger.error(e);
			throw e;
		}
	}
	
}