//
// Copyright 2017 Filippo "Fil" Bergamo <fil.bergamo@riseup.net>
// 
// This file is part of RepWifiApp.
//
// RepWifiApp is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// RepWifiApp is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with RepWifiApp.  If not, see <http://www.gnu.org/licenses/>.
// 
// ********************************************************************

package fil.libre.repwifiapp.helpers;

import java.io.File;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import fil.libre.repwifiapp.Commons;


public class AccessPointInfo implements Serializable{
		
	private static final long serialVersionUID = 1L;
	
	private String _ssid;
	private String _bssid;
	private String _auth;
	private String _level;
	private String _freq;
	private String _password;
	private long _lastTimeUsed;
	
	public AccessPointInfo(String ssid, String bssid, String authType, String level, String freq){
		
		this._ssid = ssid;
		this._bssid = bssid;
		this._auth = authType;
		this._level = level;
		this._freq = freq;
		
	}
	
	public String getSSID(){
		return this._ssid;
	}
	
	public String getBSSID(){
		return this._bssid;
	}
	
	public String getAuthType(){
		return this._auth;
	}
	
	public String getSignlalStrength(){
		return this._level;
	}
	
	public String getFrequency(){
		return this._freq;
	}
	
	public long getLastTimeUsed(){
		return this._lastTimeUsed;
	}
	
	public void setLastTimeUsed(long timeStampInMillis){
		this._lastTimeUsed = timeStampInMillis;
	}
	
	public boolean isOlderThan(int days){
		
		if (this._lastTimeUsed == 0){
			return false;
		}
		
		long timeDiff = System.currentTimeMillis() - this._lastTimeUsed;
		long spanMillis = Utils.daysToMilliseconds(days);
		
		if (timeDiff > spanMillis){
			return true;
		}else{
			return false;
		}
		
		
	}
	
	public String getPassword(){
		return this._password;
	}
	
	public void setPassword(String password){
		this._password = password;
	}
	
	public boolean needsPassword(){
		
		if ( (this._auth == null) || (this._auth.equals("")) ){
			//TODO
			//check if default behavior should be with or without password,
			//when no auth info is available.
			return false;
		}
		
		if (this._auth.contains("WPA2") || this._auth.contains("WPA")){
			return true;
		}
		else {
			return false;
		}
		
	}
	
	protected static AccessPointInfo parseLine(String line){
		
		try{
			
			String[] params = line.split("\t");
			if (params.length != 5){
				return null;
			}
			
			String bssid = params[0];
			String freq = params[1];
			String level = params[2];
			String auth = params[3];
			String ssid = params [4];
			
			AccessPointInfo info = new AccessPointInfo(ssid, bssid, auth, level, freq);
			return info;
			
		}catch (Exception e){
			Utils.logError("Error while parsing line: " + line, e);
			return null;
		}
		
	}
	
	public static AccessPointInfo[] parseScanResult(String scanResultFile){
		
		try {
			
			File f = new File(scanResultFile);
			if (! f.exists()){
				Utils.logError("AccessPointInfo.parseScanResult(): The provided scan result file doesn't exist");
				return null;
			}
			
			String[] lines = Utils.readFileLines(Commons.getScanFile());
			List<AccessPointInfo> nets = new ArrayList<AccessPointInfo>();
			
			for(String l : lines){
				if (l.startsWith(Commons.SCAN_FILE_HDR)){
					//strip off the header
					continue;
				}
				
				if (l.trim().equals("")){
					//empty line, skip.
					continue;
				}
				
				//try to parse line into network info
				AccessPointInfo info = AccessPointInfo.parseLine(l);
				if (info == null){
					Utils.logError("Failed to parse line into AccessPointInfo: " + l);
					continue;
				}
				
				nets.add(info);

			}
			
			AccessPointInfo[] a = new AccessPointInfo[nets.size()];
			a = nets.toArray(a);
			return a;
			
		} catch (Exception e) {
			Utils.logError("Error while parsing scan results in class AccessPointInfo",e);
			return null;
		}
		
	}

}