package compbio.controllers;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Collection;

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;

import compbio.cassandra.DateFormatter;
import compbio.cassandra.readers.CassandraReader;

public class BasicController {
	final protected SimpleDateFormat formaterDDMMYY = DateFormatter.getFormatDDMMYY();
	final protected SimpleDateFormat formaterYYMMDD = DateFormatter.getFormatYYMMDD();
	protected Calendar cal = Calendar.getInstance();
	protected String theEaerlistDate = DateFormatter.DateLongToString(CassandraReader.earliestDate(), formaterYYMMDD);
	protected String theCurrentDate = cal.get(Calendar.YEAR) + "/" + (cal.get(Calendar.MONTH) + 1) + "/" + cal.get(Calendar.DAY_OF_MONTH);
	
	protected String getPrincipalName() {
		Object principal = SecurityContextHolder.getContext().getAuthentication().getPrincipal();
		if (principal instanceof UserDetails) {
			UserDetails details = (UserDetails) principal;
			String rolefix = "";
			String role = details.getUsername();
			Collection<? extends GrantedAuthority> au = details.getAuthorities();
			for (GrantedAuthority ga : au) {
				if (ga.getAuthority().equals("ROLE_LDAP_USER")) {
					rolefix = "LDAP:";
				}
			}
			return rolefix + role;
		}
		return principal.toString();
	}

	protected boolean isUserRole() {
		Object principal = SecurityContextHolder.getContext().getAuthentication().getPrincipal();
		if (principal instanceof UserDetails) {
			UserDetails details = (UserDetails) principal;
			Collection<? extends GrantedAuthority> au = details.getAuthorities();
			for (GrantedAuthority ga : au) {
				if (ga.getAuthority().equals("ROLE_USER") || ga.getAuthority().equals("ROLE_LDAP_USER")) {
					return true;
				}
			}
			return false;
		}
		return false;
	}

	protected boolean isAdminRole() {
		Object principal = SecurityContextHolder.getContext().getAuthentication().getPrincipal();
		if (principal instanceof UserDetails) {
			UserDetails details = (UserDetails) principal;
			Collection<? extends GrantedAuthority> au = details.getAuthorities();
			for (GrantedAuthority ga : au) {
				if (ga.getAuthority().equals("ROLE_ADMIN")) {
					return true;
				}
			}
			return false;
		}
		return false;
	}
	
	protected String DateChecking(String trimmeddate1, String trimmeddate2, long longDate1, long longDate2) {
		Calendar cal2 = Calendar.getInstance();
		if (trimmeddate1.equalsIgnoreCase("") || trimmeddate2.equalsIgnoreCase("")) 
			return "The date cann't be empty";
		else if (!DateFormatter.isThisDateValid(trimmeddate1, formaterYYMMDD) || !DateFormatter.isThisDateValid(trimmeddate2, formaterYYMMDD)) 
			return "The date format in invalid. Try format yyyy/mm/dd";
		else if (longDate2 < CassandraReader.earliestDate()) 
			return "The date2 is after the earlestDate " + theEaerlistDate;
		else if (longDate1 > cal2.getTimeInMillis())
			return "The date1 is before the current date " + theCurrentDate;
		else if (longDate1 > longDate2) 	
			return "Wrong date's diaposon. The date1 is more than date2.";
		else 			
			return null;
	}
}