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/*
 * Copyright 2017-2024 noear.org and authors
 *
 * 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
 *
 *      https://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 org.noear.solon.aot;

import org.noear.solon.aot.hint.ExecutableHint;
import org.noear.solon.aot.hint.ExecutableMode;
import org.noear.solon.aot.hint.MemberCategory;
import org.noear.solon.aot.proxy.ProxyClassGenerator;
import org.noear.solon.core.AppContext;
import org.noear.solon.core.util.LogUtil;
import org.noear.solon.core.util.ReflectUtil;
import org.noear.solon.core.wrap.ClassWrap;
import org.noear.solon.core.wrap.FieldWrap;

import java.io.Serializable;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.sql.Driver;
import java.sql.DriverManager;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * 收集运行时的类、字段、方法，用于bean扫描时使用，本类会对 AopContext 进行整体处理
 *
 * @author songyinyin
 * @see org.noear.solon.aot.graalvm.GraalvmUtil
 * @since 2.2
 */
public class AppContextNativeProcessorDefault implements AppContextNativeProcessor {
    public static final String AOT_PROXY_CLASSNAME_SUFFIX = "$$SolonAotProxy";
    public static final String ASM_PROXY_CLASSNAME_SUFFIX = "$$SolonAsmProxy";

    private final ProxyClassGenerator proxyClassGenerator;

    public AppContextNativeProcessorDefault() {
        proxyClassGenerator = new ProxyClassGenerator();
    }


    /**
     * 处理（生成配置、代理等...）
     *
     * @param context  上下文
     * @param settings 运行设置
     * @param metadata 元信息对象
     */
    public void process(AppContext context, Settings settings, RuntimeNativeMetadata metadata) {
        AtomicInteger beanCount = new AtomicInteger();

        //for beanWrap
        context.beanForeach(beanWrap -> {
            // aot阶段产生的bean，不需要注册到 native 元数据里
            if (RuntimeNativeRegistrar.class.isAssignableFrom(beanWrap.clz())) {
                return;
            }

            Class clz = beanWrap.clz();

            //如果是接口类型，则不处理（如果有需要手动处理）
            if (clz.isInterface()) {
                return;
            }

            //开始计数
            beanCount.getAndIncrement();

            // 生成代理，测试用例时，可以不用生成代理类？
            if (beanWrap.proxy() != null && settings != null) {
                proxyClassGenerator.generateCode(settings, clz);
            }

            //注册信息（构造函数，初始化函数、注销函数等...）
            if (beanWrap.clzInit() != null) {
                metadata.registerMethod(beanWrap.clzInit(), ExecutableMode.INVOKE);
            }

            if (beanWrap.clzDestroy() != null) {
                metadata.registerMethod(beanWrap.clzDestroy(), ExecutableMode.INVOKE);
            }

            processBeanDo(metadata, clz, beanWrap.proxy() != null);
            processBeanFieldsDo(metadata, clz);
        });

        //for methodWrap
        context.methodForeach(methodWrap -> NativeMetadataUtils.registerMethodAndParamAndReturnType(metadata, methodWrap));

        //for @Inject(${..}) clz (entity)
        for (Class clz : context.aot().getEntityTypes()) {
            if (clz.getName().startsWith("java.") == false) {
                metadata.registerReflection(clz, MemberCategory.INVOKE_DECLARED_CONSTRUCTORS,
                        MemberCategory.INVOKE_PUBLIC_METHODS);
            }
        }

        //for jdk proxy interface
        for (Class clz : context.aot().getJdkProxyTypes()) {
            if (clz.getName().startsWith("java.") == false) {
                metadata.registerJdkProxy(clz);
            }
        }

        //for jdbc Driver
        Enumeration drivers = DriverManager.getDrivers();
        while (drivers.hasMoreElements()) {
            metadata.registerReflection(drivers.nextElement().getClass(), MemberCategory.INVOKE_DECLARED_CONSTRUCTORS);
        }

        //for InvocationHandler
        metadata.registerReflection(InvocationHandler.class, MemberCategory.INVOKE_DECLARED_METHODS);


        LogUtil.global().info("Aot process bean, bean size: " + beanCount.get());
    }

    /**
     * 处理序列化类
     */
    protected void processSerialization(RuntimeNativeMetadata metadata, Class type) {
        if (type.getName().startsWith("java.") == false && Serializable.class.isAssignableFrom(type)) {
            //是 Serializable 的做自动注册（不则，怕注册太多了）
            metadata.registerSerialization(type);
        }
    }


    protected void processBeanDo(RuntimeNativeMetadata nativeMetadata, Class clazz, boolean supportProxy) {
        if (clazz.isEnum() || clazz.isAnnotation()) {
            return;
        }

        // 注册
        nativeMetadata.registerDefaultConstructor(clazz);
        for (Field field : ReflectUtil.getDeclaredFields(clazz)) {
            nativeMetadata.registerField(field);
        }
        nativeMetadata.registerReflection(clazz, MemberCategory.INVOKE_DECLARED_CONSTRUCTORS);

        // 注册代理类（代理类构造时会用到反射）
        if (supportProxy) {
            String proxyClassName = ReflectUtil.getClassName(clazz) + AOT_PROXY_CLASSNAME_SUFFIX;

            nativeMetadata.registerReflection(proxyClassName, hints ->
                    hints.getConstructors().add(new ExecutableHint("", new Class[]{InvocationHandler.class}, ExecutableMode.INVOKE)));
            nativeMetadata.registerReflection(proxyClassName, hints ->
                    hints.getMemberCategories().addAll((Arrays.asList(MemberCategory.INVOKE_DECLARED_CONSTRUCTORS))));

        }
    }


    protected void processMethodDo(RuntimeNativeMetadata nativeMetadata, Method method) {
        nativeMetadata.registerMethod(method, ExecutableMode.INVOKE);
    }

    protected void processBeanFieldsDo(RuntimeNativeMetadata nativeMetadata, Class clazz) {
        ClassWrap clzWrap = ClassWrap.get(clazz);

        // 处理字段
        for (FieldWrap fieldWrap : clzWrap.getAllFieldWraps()) {
            processFieldDo(nativeMetadata, fieldWrap.getField());
        }
    }

    protected void processFieldDo(RuntimeNativeMetadata nativeMetadata, Field field) {
        nativeMetadata.registerField(field);
        nativeMetadata.registerReflection(field.getDeclaringClass(), MemberCategory.DECLARED_FIELDS);
    }
}