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package io.smallrye.config.inject;

import static io.smallrye.config.inject.SecuritySupport.getContextClassLoader;

import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Collections;
import java.util.Set;

import jakarta.enterprise.context.Dependent;
import jakarta.enterprise.context.spi.CreationalContext;
import jakarta.enterprise.inject.Default;
import jakarta.enterprise.inject.spi.Bean;
import jakarta.enterprise.inject.spi.BeanManager;
import jakarta.enterprise.inject.spi.InjectionPoint;

import org.eclipse.microprofile.config.ConfigProvider;

import io.smallrye.config.ConfigMapping;
import io.smallrye.config.ConfigMappings.ConfigClass;
import io.smallrye.config.SmallRyeConfig;

public class ConfigMappingInjectionBean implements Bean {
    private final BeanManager bm;
    private final ConfigClass configClass;

    public ConfigMappingInjectionBean(final ConfigClass configClass, final BeanManager bm) {
        this.bm = bm;
        this.configClass = configClass;
    }

    @Override
    public Class getBeanClass() {
        return (Class) configClass.getKlass();
    }

    @Override
    public Set getInjectionPoints() {
        return Collections.emptySet();
    }

    @Override
    public T create(final CreationalContext creationalContext) {
        InjectionPoint injectionPoint = (InjectionPoint) bm.getInjectableReference(new MetadataInjectionPoint(),
                creationalContext);

        String prefix = configClass.getPrefix();
        if (injectionPoint != null && injectionPoint.getAnnotated() != null) {
            ConfigMapping configMapping = injectionPoint.getAnnotated().getAnnotation(ConfigMapping.class);
            if (configMapping != null) {
                prefix = configMapping.prefix();
            }
        }

        SmallRyeConfig config = ConfigProvider.getConfig(getContextClassLoader()).unwrap(SmallRyeConfig.class);
        return config.getConfigMapping(getBeanClass(), prefix);
    }

    @Override
    public void destroy(final T instance, final CreationalContext creationalContext) {

    }

    @Override
    public Set getTypes() {
        return Collections.singleton(configClass.getKlass());
    }

    @Override
    public Set getQualifiers() {
        return Collections.singleton(Default.Literal.INSTANCE);
    }

    @Override
    public Class getScope() {
        return Dependent.class;
    }

    @Override
    public String getName() {
        return this.getClass().getSimpleName() + "_" + configClass.getKlass().getName();
    }

    @Override
    public Set> getStereotypes() {
        return Collections.emptySet();
    }

    @Override
    public boolean isAlternative() {
        return false;
    }
}