package com.realdolmen.ticker.services;

import com.realdolmen.ticker.repositories.UserRepository;
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.stereotype.Service;

@Service("CustomUserDetailService")
public class CustomUserDetailsService implements UserDetailsService
{

    @Autowired
    private UserRepository repository;

    static final PasswordEncoder passwordEncoder = new BCryptPasswordEncoder();

    @Override
    public UserDetails loadUserByUsername(String s) throws UsernameNotFoundException
    {
        com.realdolmen.ticker.models.User user = repository.findByEmail(s);

        //check if this user with this username exist, if not, throw an exception
        // and stop the login process
        if (user == null)
        {
            throw new UsernameNotFoundException("User details not found with this email: " + s);
        }

        String username = user.getEmail();
        String password = user.getPassword();
        String role = user.getRole().getName();

        List<SimpleGrantedAuthority> authList = getAuthorities(role);

        //get the encoded password
        String encodedPassword = passwordEncoder.encode(password);

        User userDetails = new User(username, encodedPassword, authList);

        return userDetails;
    }

    private List<SimpleGrantedAuthority> getAuthorities(String role)
    {
        List<SimpleGrantedAuthority> authList = new ArrayList<>();
        authList.add(new SimpleGrantedAuthority("ROLE_USER"));
        authList.add(new SimpleGrantedAuthority("ROLE_ADMIN"));

        if (role != null && role.trim().length() > 0)
        {
            if (role.equals("admin"))
            {
                authList.add(new SimpleGrantedAuthority("ROLE_ADMIN"));
            }
            if (role.equals("user"))
            {
                authList.add(new SimpleGrantedAuthority("ROLE_USER"));
            }
        }

        return authList;
    }
}