/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.shiro.samples.sprhib.web;

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * Web MVC controller that handles security-related web requests, such as login and logout.
 */
@Controller
public class SecurityController {

    private LoginValidator loginValidator = new LoginValidator();

    @GetMapping("/login")
    public String showLoginForm(Model model, @ModelAttribute LoginCommand command) {
        return "login";
    }

    @PostMapping("/login")
    public String login(Model model, @ModelAttribute LoginCommand command, BindingResult errors) {
        loginValidator.validate(command, errors);

        if (errors.hasErrors()) {
            return showLoginForm(model, command);
        }

        UsernamePasswordToken token = new UsernamePasswordToken(command.getUsername(),
                        command.getPassword(), command.isRememberMe());
        try {
            SecurityUtils.getSubject().login(token);
        } catch (AuthenticationException e) {
            errors.reject("error.login.generic", "Invalid username or password.  Please try again.");
        }

        if (errors.hasErrors()) {
            return showLoginForm(model, command);
        } else {
            return "redirect:/s/home";
        }
    }

    @RequestMapping("/logout")
    public String logout() {
        SecurityUtils.getSubject().logout();
        return "redirect:/";
    }


}
