/**
 * Copyright © 2016-2018 The Thingsboard Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.thingsboard.server.service.security.auth.jwt;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jws;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.stereotype.Component;
import org.thingsboard.server.config.JwtSettings;
import org.thingsboard.server.service.security.auth.JwtAuthenticationToken;
import org.thingsboard.server.service.security.model.SecurityUser;
import org.thingsboard.server.service.security.model.token.JwtTokenFactory;
import org.thingsboard.server.service.security.model.token.RawAccessJwtToken;

import java.util.List;
import java.util.stream.Collectors;

@Component
@SuppressWarnings("unchecked")
public class JwtAuthenticationProvider implements AuthenticationProvider {

    private final JwtTokenFactory tokenFactory;

    @Autowired
    public JwtAuthenticationProvider(JwtTokenFactory tokenFactory) {
        this.tokenFactory = tokenFactory;
    }

    @Override
    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
        RawAccessJwtToken rawAccessToken = (RawAccessJwtToken) authentication.getCredentials();
        SecurityUser securityUser = tokenFactory.parseAccessJwtToken(rawAccessToken);
        return new JwtAuthenticationToken(securityUser);
    }

    @Override
    public boolean supports(Class<?> authentication) {
        return (JwtAuthenticationToken.class.isAssignableFrom(authentication));
    }
}
