package de.mrbesen.youtubecrawler;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.Map.Entry;

import org.apache.log4j.Logger;

public class Config {
	
	public static Properties prop = new Properties();
	private static Logger log = Logger.getLogger(Config.class.getName());
	private static File conf;
	
	private static Map<String,String> properties = new HashMap<String, String>() {
		{
			put("db.host"		, "localhost" );
			put("db.port"		, "3306" );
			put("db.user"		, "ytcrawler" );
			put("db.pw"			, "" );
			put("db.dbname"		, "ytcrawler" );
			put("youtube.apikey", "" );
		}
	};
	
	public Config(final File conf) {
		Config.conf = conf;
		try {
			prop.load(new FileInputStream(conf));
		} catch(IOException e) {
			log.error("can not load Config", e);
			generateNewConfig();
		}
	}
	
	private void generateNewConfig() {
		log.fatal("Configuration file " + conf.getName() + " not found or can't be opened!");
		
		try {
			// set defaults
			for(Entry<String, String> entr : properties.entrySet()) {
				prop.setProperty(entr.getKey(), entr.getValue());
			}
			
			// safe into new configuration file
			prop.store(new FileWriter(conf), "");
			log.info("Created " + conf.getName() + " with default values. "
					+ "Please insert your API key and update the download base url."
			);
			
		} catch (IOException ex) {
			// when the new configuration file can't be written to disk
			log.error("Configuration file " + conf.getName() 
					+ "could not be created. Please check file writing permissions."
			);
			
		} finally {
			// user has to fix this, else the bot won't work at all
			log.info("Will now exit.");
			System.exit(1);
		}
	}
}