package com.vincent.rsf.httpaudit.config;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.env.EnvironmentPostProcessor;
import org.springframework.boot.env.YamlPropertySourceLoader;
import org.springframework.core.Ordered;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.PropertySource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;

import java.io.IOException;
import java.util.List;

/**
 * jar 内默认配置，最低优先级；引用工程覆盖。
 */
public class HttpAuditJarDefaultsEnvironmentPostProcessor implements EnvironmentPostProcessor, Ordered {

    private static final Logger log = LoggerFactory.getLogger(HttpAuditJarDefaultsEnvironmentPostProcessor.class);

    private static final String RESOURCE = "META-INF/rsf-http-audit/defaults.yml";
    private static final String NAME = "httpAuditJarDefaults";

    @Override
    public void postProcessEnvironment(ConfigurableEnvironment environment, SpringApplication application) {
        if (environment.getPropertySources().contains(NAME)) {
            return;
        }
        Resource resource = new ClassPathResource(RESOURCE);
        if (!resource.exists()) {
            return;
        }
        try {
            YamlPropertySourceLoader loader = new YamlPropertySourceLoader();
            List<PropertySource<?>> loaded = loader.load(NAME, resource);
            for (PropertySource<?> ps : loaded) {
                environment.getPropertySources().addLast(ps);
            }
        } catch (IOException e) {
            log.warn("http_audit_warn code=jar_defaults_load_failed", e);
        }
    }

    @Override
    public int getOrder() {
        return Ordered.LOWEST_PRECEDENCE;
    }
}