/* Class Bateria : Accedir a consultar l'estat de la bateria
 * Artur Nebot Garrigo
 * Llicència GPL
 * */
import java.io.*;
import java.util.*;

public class bateria {
	private static final String STATE="/proc/acpi/battery/BAT1/state";
	private static final String INFO="/proc/acpi/battery/BAT1/info";
	
	public static String getStatus() {
		String linea="";
		String estat="";
		String Fitxer=STATE;
		BufferedReader entrada;
         int i=0;
		 int num;
         try {
            FileReader fr = new FileReader(Fitxer); 
            entrada = new BufferedReader(fr);  num=1;      
            while((linea = entrada.readLine()) != null) 
            {
				if (linea.substring(0,"charging state:".length()).equals("charging state:")) {
					estat=linea.substring(25,linea.length());
				}
            }	
            entrada.close();
         }
             catch(java.io.FileNotFoundException fnfex) {
               return "-1";
			 }
             catch(java.io.IOException ioex) {
			 	return "-2";
			 }
		return (estat);
	}
	public static int getRemainingCapacity() {
		 String linea="";
		 String prate="";
		 String Fitxer=STATE;
		 BufferedReader entrada;
         int i=0;
		 int num;
      
         try {
            FileReader fr = new FileReader(Fitxer); 
            entrada = new BufferedReader(fr);  num=1;      
            while((linea = entrada.readLine()) != null) 
            {
				if (linea.substring(0,"remaining capacity:".length()).equals("remaining capacity:")) {
					prate=linea.substring(25,linea.length());
					do {
						i++;
					} while ( prate.charAt(i) != 109) ; // Lleig!
					prate=prate.substring(0,i);
				}
            }	
            entrada.close();
         }
             catch(java.io.FileNotFoundException fnfex) {
               return -1;
			 }
             catch(java.io.IOException ioex) {
			 	return -1;
			 }
		prate=prate.trim();
		return Integer.valueOf(prate);
		}
	public static int getFullCapacity() {
		 String linea="";
		 String prate="";
		 String Fitxer=INFO;
		 BufferedReader entrada;
         int i=0;
		 int num;
      
         try {
            FileReader fr = new FileReader(Fitxer); 
            entrada = new BufferedReader(fr);  num=1;      
            while((linea = entrada.readLine()) != null) 
            {
				if (linea.substring(0,"last full capacity:".length()).equals("last full capacity:")) {
					prate=linea.substring(25,linea.length());
					do {
						i++;
					} while ( prate.charAt(i) != 109) ; // Lleig!
					prate=prate.substring(0,i);
				}
            }	
            entrada.close();
         }
             catch(java.io.FileNotFoundException fnfex) {
               return -1;
			 }
             catch(java.io.IOException ioex) {
			 	return -1;
			 }
		prate=prate.trim();
		return Integer.valueOf(prate);
		}
	public static int getCharge() {
		return Math.round(((float)getRemainingCapacity()/(float)getFullCapacity())*100);
	}
}