package chat.server;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.Reader;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.ServletContext;

import frame.variant.translator.Translator;

public class Configer {

	private static Configer instance;
	private static Object lock = new Object();
	
	private Map<String, String> params;
	private String Path_Application;
	private String Path_WebInfo;
	private String Path_Config;
	private String Path_SQL;

	private Configer() {
		params = new HashMap<String, String>();
	}
	
	public static Configer getInstance() {
		if (instance == null) {
			synchronized (lock) {
				if (instance == null) {
					instance = new Configer();
				}
			}
		}
		
		return instance;
	}
	
	public static void init(ServletContext servletContext) {
		try {
			getInstance();
			
			instance.params = new HashMap<String, String>();

			instance.Path_Application = servletContext.getRealPath("").replace("\\", "/");
			instance.Path_WebInfo = servletContext.getRealPath("/WEB-INF").replace("\\", "/");
			instance.Path_Config = instance.Path_WebInfo + "/config/";
			instance.Path_SQL = instance.Path_WebInfo + "/sql/";
			
			instance.load();
		}
		catch(Exception e) {
			e.printStackTrace();
		}
	}

	private void load() throws Exception {
		File file = new File(Path_Config + "/wildfirechat.conf");
		
		Reader reader = new FileReader(file);
        BufferedReader br = new BufferedReader(reader);
        
        try {
        	String line;
        	
            while ((line = br.readLine()) != null) {
            	line = line.trim();
                
                if (line.startsWith("#")) {
                	continue;
                }

                loadOneLine(line);
            }
        } 
        finally {
        	reader.close();
        }
	}

	private void loadOneLine(String line) {
		if (line == null) {
			return;
		}
		
		line = line.trim();
		
        int delimiterIdx = line.indexOf(' ');
        
        if (delimiterIdx <= 0) {
        	return;
        }
        
        String key = line.substring(0, delimiterIdx).trim();
        String value = line.substring(delimiterIdx).trim();
        
        params.put(key, value);
	}

	public static String getPath_WebInfo() {
		return instance.Path_WebInfo;
	}

	public static String getPath_Config() {
		return instance.Path_Config;
	}

	public static String getPath_TimerConfig() {
		return instance.Path_Config + "timer.properties";
	}

	public static String getWebserviceURI() {
		return "http://www.jydatas.com/";
	}

	public static String getPath_Application() {
		return instance.Path_Application;
	}
	
	public static String getPath_Application(String subpath) {
		if (subpath == null) {
			return instance.Path_Application;
		}
		
		subpath = subpath.replace("\\", "/");
		
		if ('/' != subpath.charAt(0)) {
			subpath = "/" + subpath;
		}
		
		if ('/' != subpath.charAt(subpath.length() - 1)) {
			subpath = subpath + "/";
		}
		
		return instance.Path_Application + subpath;
	}

	public static String getPath_LoggerConfig() {
		return instance.Path_Config + "log4j.properties";
	}

	public static String getPath_SQLConfig() {
		return instance.Path_SQL;
	}

	public static String getPath_SQLDTD() {
		return instance.Path_Config + "sql.dtd";
	}

	public static String getPath_MainConfig() {
		return instance.Path_Config + "config.xml";
	}

	public static String getPath_Datasource() {
		return instance.Path_Config + "datasource.xml";
	}

	public static String getPath_Upload(String username) {
		return instance.Path_Application + "/upload/" + username;
	}

	public static String getPath_Temp() {
		return instance.Path_Application + "/temp";
	}
	
	public static String getPath_Temp(String username) {
		return instance.Path_Application + "/temp/" + username;
	}

	public static String getPath_Template() {
		return instance.Path_Application + "/template";
	}

	public static String getPath_WXConfig() {
		return instance.Path_Config + "weixin.properties";
	}

	public static Integer getInteger(String name, Integer defaultValue) {
		String value = getString(name);
		return Translator.toInteger(value, defaultValue);
	}

	public static boolean getBoolean(String name, boolean defaultValue) {
		String value = getString(name);
		return Translator.toBoolean(value, defaultValue);
	}

	public static String getString(String name) {
		if (name == null) {
			return null;
		}
		
		name = name.toLowerCase();
		String result = instance.params.get(name);
		
		return result;
	}

}