package ciai.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Service;

import ciai.exception.AccountAlreadyExistException;
import ciai.model.Account;
import ciai.model.Degree;
import ciai.model.Professor;
import ciai.model.Student;
import ciai.repository.AccountRepository;
import ciai.repository.DegreeRepository;
import ciai.repository.ProfessorRepository;
import ciai.repository.RoleRepository;
import ciai.repository.StudentRepository;
import tools.AccountRole;

@Service
public class AccountService {

	@Autowired
	AccountRepository accRep;
	@Autowired
	RoleRepository roleRep;
	@Autowired
	StudentRepository studentsRep;
	@Autowired
	DegreeRepository degreesRep;
	@Autowired
	ProfessorRepository profRep;

	public Account getAccountByUsername(String username) {
		return accRep.findByUsername(username);
	}

	public Account createAccount(String name, String username, String password, String type, String degree)
			throws AccountAlreadyExistException, Exception {
		if (getAccountByUsername(username) != null && getAccountByUsername(username + "@fct.unl.pt") == null)
			throw new AccountAlreadyExistException();

		BCryptPasswordEncoder encoder = new BCryptPasswordEncoder();
		Account newAccount = null;
		int rt = Integer.parseInt(type);
		String encrypted_Password = encoder.encode(password);
		
		if(accRep.findByUsername(username) != null || accRep.findByUsername(username+"@fct.unl.pt") != null)
			throw new AccountAlreadyExistException();

		if (rt == 0) {
			newAccount = new Account(username + "@fct.unl.pt", encrypted_Password,
					roleRep.findByDescription(AccountRole.STUDENT));
			
			if(accRep.save(newAccount) == null)
				throw new AccountAlreadyExistException(); 

			Iterable<Student> it = studentsRep.findAll();
			int max = 1000;
			for (Student s : it) {
				if (max <= s.getNumber()) {
					max = s.getNumber() + 1;
				}
			}
			Long degreeId = Long.valueOf(degree);
			Degree dg = degreesRep.findOne(degreeId);
			if(dg == null){
				throw new Exception();
			}
			Student s = new Student(name, newAccount, max);
			s.setDegree(dg);
			
			if(studentsRep.save(s) == null)
				throw new AccountAlreadyExistException();

		} else if (rt == 1 || rt == 2) {
			if (rt == 1)
				newAccount = new Account(username, encrypted_Password,
						roleRep.findByDescription(AccountRole.PROFESSOR));
			else
				newAccount = new Account(username, encrypted_Password,
						roleRep.findByDescription(AccountRole.ASSISTANT));

			if(accRep.save(newAccount) == null)
				throw new AccountAlreadyExistException();
				
			Professor p = new Professor(name, username + "@fct.unl.pt", newAccount);
			
			if(profRep.save(p) == null)
				throw new AccountAlreadyExistException();
		}
		
		return newAccount;

	}

}