package org.apereo.cas.config;

import org.apereo.cas.adaptors.generic.FileAuthenticationHandler;
import org.apereo.cas.authentication.AuthenticationEventExecutionPlan;
import org.apereo.cas.authentication.AuthenticationEventExecutionPlanConfigurer;
import org.apereo.cas.authentication.AuthenticationHandler;
import org.apereo.cas.authentication.principal.DefaultPrincipalFactory;
import org.apereo.cas.authentication.principal.PrincipalFactory;
import org.apereo.cas.authentication.principal.PrincipalNameTransformerUtils;
import org.apereo.cas.authentication.principal.PrincipalResolver;
import org.apereo.cas.authentication.support.password.PasswordEncoderUtils;
import org.apereo.cas.authentication.support.password.PasswordPolicyConfiguration;
import org.apereo.cas.configuration.CasConfigurationProperties;
import org.apereo.cas.configuration.model.support.generic.FileAuthenticationProperties;
import org.apereo.cas.services.ServicesManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration("myAuthenticationEventExecutionPlanConfiguration")
@EnableConfigurationProperties(CasConfigurationProperties.class)
public class MyAuthenticationEventExecutionPlanConfiguration  implements AuthenticationEventExecutionPlanConfigurer 
{
	private static final Logger LOGGER = LoggerFactory.getLogger(MyAuthenticationEventExecutionPlanConfiguration.class);

    @Autowired
    private CasConfigurationProperties casProperties;
    
    @Autowired(required = false)
    @Qualifier("customFilePasswordPolicyConfiguration")
    private PasswordPolicyConfiguration customFilePasswordPolicyConfiguration;
    
    @Autowired
    @Qualifier("servicesManager")
    private ServicesManager servicesManager;
    
    @Autowired
    @Qualifier("personDirectoryPrincipalResolver")
    private PrincipalResolver personDirectoryPrincipalResolver;
    
    @ConditionalOnMissingBean(name = "filePrincipalFactory")
    @Bean
    public PrincipalFactory filePrincipalFactory() {
        return new DefaultPrincipalFactory();
    }

    @Bean
    public AuthenticationHandler myAuthenticationHandler() 
    {
    		final FileAuthenticationProperties fileProperties = casProperties.getAuthn().getFile();
    		final FileAuthenticationHandler h = new FileAuthenticationHandler(fileProperties.getName(), servicesManager, filePrincipalFactory(),
                    fileProperties.getFilename(), fileProperties.getSeparator());
    		h.setPasswordEncoder(PasswordEncoderUtils.newPasswordEncoder(fileProperties.getPasswordEncoder()));
            if (customFilePasswordPolicyConfiguration != null) {
                h.setPasswordPolicyConfiguration(customFilePasswordPolicyConfiguration);
            }
            h.setPrincipalNameTransformer(PrincipalNameTransformerUtils.newPrincipalNameTransformer(fileProperties.getPrincipalTransformation()));

            return h;
    }

    @Override
    public void configureAuthenticationExecutionPlan(final AuthenticationEventExecutionPlan plan) {
    	if (casProperties.getAuthn().getFile().getFilename() != null) {
            LOGGER.debug("zzz Added file-based authentication handler");
            plan.registerAuthenticationHandlerWithPrincipalResolver(myAuthenticationHandler(), personDirectoryPrincipalResolver);
        }
    }
}