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/**
 * Copyright 2017 ~ 2025 the original authors James Wong.
 * 
 * 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 ALL_OR KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.wl4g.infra.common.tests.integration;

import com.wl4g.infra.common.lang.ClassUtils2;
import lombok.Getter;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.ApplicationRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.validation.constraints.NotNull;

import static java.lang.System.getProperty;
import static java.lang.System.getenv;
import static java.util.Locale.US;
import static java.util.Objects.isNull;
import static java.util.Objects.requireNonNull;
import static org.apache.commons.lang3.StringUtils.isBlank;
import static org.apache.commons.lang3.StringUtils.replace;

/**
 * The {@link IntegrationTestApplication}
 *
 * @author James Wong
 * @since v1.0
 **/
@Slf4j
@Getter
public abstract class IntegrationTestApplication {
    public static final String IT_ASSERTION_APPLICATION_CLASS_KEY = "it.assertion.application.class";
    public static final String IT_ASSERTION_APPLICATION_CLASS_ENV = replace(IT_ASSERTION_APPLICATION_CLASS_KEY.toLowerCase(US), ".", "_");
    private static volatile IntegrationTestApplication INSTANCE;
    private ConfigurableApplicationContext context;
    private Runnable startedListener;

    public static IntegrationTestApplication getInstance() {
        if (isNull(INSTANCE)) {
            synchronized (IntegrationTestApplication.class) {
                if (isNull(INSTANCE)) {
                    String itAppClass = getenv(IT_ASSERTION_APPLICATION_CLASS_ENV);
                    if (isBlank(itAppClass)) {
                        itAppClass = getProperty(IT_ASSERTION_APPLICATION_CLASS_KEY);
                    }
                    if (isBlank(itAppClass)) {
                        throw new IllegalStateException(String.format("Could not create integration test main class instance, please sets JVM property '%s' or environment '%s'",
                                IT_ASSERTION_APPLICATION_CLASS_KEY, IT_ASSERTION_APPLICATION_CLASS_ENV));
                    }
                    try {
                        INSTANCE = (IntegrationTestApplication) ClassUtils2.forName(itAppClass,
                                        Thread.currentThread().getContextClassLoader())
                                .getConstructor()
                                .newInstance();
                    } catch (Throwable ex) {
                        throw new IllegalStateException("Could not create it application instance", ex);
                    }
                }
            }
        }
        return INSTANCE;
    }

    public void doMain(String[] args) {
        log.info("Starting for Integration Test Application ...");
        SpringApplication.run(getClass(), args);
    }

    public void exit() {
        SpringApplication.exit(context);
    }

    public void setStartedListener(@NotNull Runnable startedListener) {
        this.startedListener = requireNonNull(startedListener, "startedListener");
    }

    @SuppressWarnings("unused")
    @Configuration
    @ConditionalOnProperty(name = IT_ASSERTION_APPLICATION_CLASS_KEY)
    static class IntegrationTestApplicationConfiguration {
        @Bean
        public ApplicationRunner applicationRunner(ConfigurableApplicationContext context) {
            getInstance().context = context;
            return args -> {
                if (getInstance().getStartedListener() != null) {
                    getInstance().getStartedListener().run();
                }
            };
        }
    }

}