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/*
 * Copyright (c) 2015-2020 Rocket Partners, LLC
 * https://github.com/inversion-api
 *
 * 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 io.inversion.spring.config;

import io.inversion.Api;
import io.inversion.ApiException;
import io.inversion.Engine;
import io.inversion.config.Config;
import io.inversion.utils.Utils;
import org.apache.commons.configuration2.CompositeConfiguration;
import org.apache.commons.configuration2.Configuration;
import org.apache.commons.configuration2.PropertiesConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.GenericBeanDefinition;
import org.springframework.context.EnvironmentAware;
import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
import org.springframework.core.env.AbstractEnvironment;
import org.springframework.core.env.EnumerablePropertySource;
import org.springframework.core.env.Environment;
import org.springframework.core.env.MutablePropertySources;
import org.springframework.core.type.AnnotationMetadata;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.StreamSupport;

public class InversionRegistrar implements ImportBeanDefinitionRegistrar, EnvironmentAware, BeanFactoryAware {

    static final Logger log = LoggerFactory.getLogger(InversionRegistrar.class);
    static Environment environment = null;
    static BeanFactory beanFactory = null;
    public static Api[] apis = null;

    @Override
    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
        this.beanFactory = beanFactory;
        if (apis != null && apis.length > 0) {
            ConfigurableBeanFactory config = (ConfigurableBeanFactory) beanFactory;
            for (Api api : apis) {
                String name = api.getName();
                if (name == null)
                    throw new ApiException("Your Api must have a non null 'name' property configured when running your APIs with SpringBoot.");

                config.registerSingleton(name, api);
            }
        }
    }

    @Override
    public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
        GenericBeanDefinition bean = new GenericBeanDefinition();
        bean.setBeanClass(Engine.class);
        //-- the Apis will be set on the Engine in InversionServletConfig.buildEngineServlet()
        bean.setAutowireMode(AbstractBeanDefinition.AUTOWIRE_NO);
        bean.setDestroyMethodName("shutdown");
        registry.registerBeanDefinition("engine", bean);
    }

    @Override
    public void setEnvironment(Environment environment) {
        this.environment = environment;
        setEnvironmentDefaults(environment);
    }

    protected void setEnvironmentDefaults(Environment env) {
        log.info("Setting SpringBoot Defaults:");
        setEnvironmentDefault(env, "server.compression.enabled", "true");
        setEnvironmentDefault(env, "server.compression.mime-types", "text/html,text/xml,text/plain,text/css,text/javascript,application/javascript,application/json");
        setEnvironmentDefault(env, "server.compression.min-response-size", "2048");
        setEnvironmentDefault(env, "server.port", "8080");
        setEnvironmentDefault(env, "spring.servlet.multipart.enabled", "true");
        setEnvironmentDefault(env, "spring.servlet.multipart.max-file-size", "100MB");
        setEnvironmentDefault(env, "spring.servlet.multipart.max-request-size", "100MB");
    }

    protected void setEnvironmentDefault(Environment env, String prop, String value) {
        String found = env.getProperty(prop);
        if (found == null) {
            System.setProperty(prop, value);
            log.info("  - [SETTING]  " + prop + " = " + value);
        } else {
            log.info("  - [SKIPPING] " + prop + " = " + found);
        }
    }

}