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package shz.spring;

import com.alibaba.fastjson2.JSON;
import org.springframework.aop.framework.AdvisedSupport;
import org.springframework.aop.framework.AopProxy;
import org.springframework.aop.support.AopUtils;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.config.ConstructorArgumentValues;
import org.springframework.beans.factory.support.*;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextInitializer;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.DefaultParameterNameDiscoverer;
import org.springframework.core.Ordered;
import org.springframework.core.env.Environment;
import shz.core.*;
import shz.core.cl.ClassLoaderHelp;
import shz.core.constant.ArrayConstant;
import shz.core.constant.NullConstant;
import shz.core.msg.ClientFailureMsg;

import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.function.*;
import java.util.regex.Pattern;

/**
 * 执行顺序
 * //@AutoConfigureAfter：在指定的配置类初始化后再加载
 * //@AutoConfigureBefore：在指定的配置类初始化前加载
 * //@AutoConfigureOrder：数越小越先初始化
 * 

 * 条件配置
 * //@ConditionalOnClass ： classpath中存在该类时起效
 * //@ConditionalOnMissingClass ： classpath中不存在该类时起效
 * //@ConditionalOnBean ： DI容器中存在该类型Bean时起效
 * //@ConditionalOnMissingBean ： DI容器中不存在该类型Bean时起效
 * //@ConditionalOnSingleCandidate ： DI容器中该类型Bean只有一个或@Primary的只有一个时起效
 * //@ConditionalOnExpression ： SpEL表达式结果为true时
 * //@ConditionalOnProperty ： 参数设置或者值一致时起效
 * //@ConditionalOnResource ： 指定的文件存在时起效
 * //@ConditionalOnJndi ： 指定的JNDI存在时起效
 * //@ConditionalOnJava ： 指定的Java版本存在时起效
 * //@ConditionalOnWebApplication ： Web应用环境下起效
 * //@ConditionalOnNotWebApplication ： 非Web应用环境下起效
 */
@SuppressWarnings("unchecked")
public final class BeanContainer implements ApplicationContextInitializer, BeanDefinitionRegistryPostProcessor, Ordered {
    private static volatile ApplicationContext context;
    private static Environment environment;
    private static volatile DefaultListableBeanFactory beanFactory;
    private static final Object setMonitor = new Object();

    /**
     * 执行列表
     */
    private static List TODO_LIST = new CopyOnWriteArrayList<>();

    @Override
    public void initialize(ConfigurableApplicationContext applicationContext) {
        if (context != null) return;
        synchronized (setMonitor) {
            if (context != null) return;
            context = applicationContext;
            environment = context.getEnvironment();

            if (beanFactory != null) {
                TODO_LIST.stream().sorted(Comparator.comparing(Todo::order)).forEach(Todo::execute);
                TODO_LIST = null;
            }
        }
    }

    @Override
    public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry beanDefinitionRegistry) throws BeansException {
    }

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory configurableListableBeanFactory) throws BeansException {
        if (beanFactory != null || !(configurableListableBeanFactory instanceof DefaultListableBeanFactory)) return;
        synchronized (setMonitor) {
            if (beanFactory != null) return;
            beanFactory = (DefaultListableBeanFactory) configurableListableBeanFactory;

            if (context != null) {
                TODO_LIST.stream().sorted(Comparator.comparing(Todo::order)).forEach(Todo::execute);
                TODO_LIST = null;
            }
        }
    }

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

    public static ApplicationContext getContext() {
        return context;
    }

    public static Environment getEnvironment() {
        return environment;
    }

    public static DefaultListableBeanFactory getBeanFactory() {
        return beanFactory;
    }

    public static  T get(String name) {
        T bean = null;
        try {
            bean = (T) context.getBean(name);
        } catch (Throwable ignored) {
        }
        return bean;
    }

    public static void set(int order, Runnable setter) {
        if (context == null || beanFactory == null) {
            synchronized (setMonitor) {
                if (context == null || beanFactory == null) {
                    TODO_LIST.add(new Todo() {
                        @Override
                        public int order() {
                            return order;
                        }

                        @Override
                        public void execute() {
                            setter.run();
                        }
                    });
                    return;
                }
            }
        }
        setter.run();
    }

    public static void set(Runnable setter) {
        set(0, setter);
    }

    public static  void set(int order, String name, Consumer setter) {
        set(order, () -> setter.accept(get(name)));
    }

    public static  void set(String name, Consumer setter) {
        set(0, name, setter);
    }

    public static  T get(String name, Supplier supplier) {
        T bean = get(name);
        if (bean != null) return bean;
        if (supplier == null) return null;
        bean = supplier.get();
        if (bean != null) try {
            beanFactory.registerSingleton(name, bean);
        } catch (Throwable ignored) {
        }
        return bean;
    }

    public static  void set(int order, String name, Supplier supplier, Consumer setter) {
        set(order, () -> setter.accept(get(name, supplier)));
    }

    public static  void set(String name, Supplier supplier, Consumer setter) {
        set(0, name, supplier, setter);
    }

    public static  T get(Class cls) {
        T bean = null;
        try {
            bean = context.getBean(cls);
        } catch (Throwable ignored) {
        }
        return bean;
    }

    public static  void set(int order, Class cls, Consumer setter) {
        set(order, () -> setter.accept(get(cls)));
    }

    public static  void set(Class cls, Consumer setter) {
        set(0, cls, setter);
    }

    public static  T get(Class cls, Supplier supplier) {
        T bean = get(cls);
        if (bean != null) return bean;
        if (supplier == null) return null;
        bean = supplier.get();
        if (bean != null) try {
            beanFactory.registerSingleton(cls.toGenericString(), bean);
        } catch (Throwable ignored) {
        }
        return bean;
    }

    public static  void set(int order, Class cls, Supplier supplier, Consumer setter) {
        set(order, () -> setter.accept(get(cls, supplier)));
    }

    public static  void set(Class cls, Supplier supplier, Consumer setter) {
        set(0, cls, supplier, setter);
    }

    public static  T get(String name, String className) {
        T bean = get(name);
        if (bean != null) return bean;
        Class cls = (Class) ClassLoaderHelp.load(className, true, ClassLoaderHelp.get());
        if (cls == null) return null;
        return get(cls, () -> AccessibleHelp.newInstance(cls));
    }

    public static  void set(int order, String name, String className, Consumer setter) {
        set(order, () -> setter.accept(get(name, className)));
    }

    public static  void set(String name, String className, Consumer setter) {
        set(0, name, className, setter);
    }

    public static  Class getBeanClass(Object bean) {
        return (Class) (AopUtils.isAopProxy(bean) ? AopUtils.getTargetClass(bean) : bean.getClass());
    }

    public static  T getTargetBean(Object bean) {
        while (true) if (!AopUtils.isAopProxy(bean = getTargetBean0(bean))) break;
        return (T) bean;
    }

    private static Object getTargetBean0(Object bean) {
        try {
            if (AopUtils.isJdkDynamicProxy(bean)) return getJdkTargetBean(bean);
            else if (AopUtils.isCglibProxy(bean)) return getCglibTargetBean(bean);
        } catch (Exception e) {
            return null;
        }
        return bean;
    }

    private static Object getJdkTargetBean(Object proxy) throws Exception {
        Field h = proxy.getClass().getSuperclass().getDeclaredField("h");
        h.setAccessible(true);
        AopProxy aopProxy = (AopProxy) h.get(proxy);
        Field advised = aopProxy.getClass().getDeclaredField("advised");
        advised.setAccessible(true);
        return ((AdvisedSupport) advised.get(aopProxy)).getTargetSource().getTarget();
    }

    private static Object getCglibTargetBean(Object proxy) throws Exception {
        Field h = proxy.getClass().getDeclaredField("CGLIB$CALLBACK_0");
        h.setAccessible(true);
        Object dynamicAdvisedInterceptor = h.get(proxy);
        Field advised = dynamicAdvisedInterceptor.getClass().getDeclaredField("advised");
        advised.setAccessible(true);
        return ((AdvisedSupport) advised.get(dynamicAdvisedInterceptor)).getTargetSource().getTarget();
    }

    private static final DefaultParameterNameDiscoverer PND = new DefaultParameterNameDiscoverer();

    public static String[] getParameterNames(Method method) {
        return PND.getParameterNames(method);
    }

    public static String[] getParameterNames(Constructor constructor) {
        return PND.getParameterNames(constructor);
    }

    public static void registerBeanDefinition(int order, Class cls, Class fbCls, Object... args) {
        set(order, () -> registerBeanDefinition0(cls, fbCls, args));
    }

    private static void registerBeanDefinition0(Class cls, Class fbCls, Object... args) {
        if (context.containsBeanDefinition(cls.getSimpleName())) return;
        BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(cls);
        GenericBeanDefinition definition = (GenericBeanDefinition) builder.getRawBeanDefinition();
        ConstructorArgumentValues argumentValues = definition.getConstructorArgumentValues();
        for (int i = 0; i < args.length; ++i) argumentValues.addIndexedArgumentValue(i, args[i]);
        definition.setBeanClass(fbCls);
        definition.setAutowireMode(GenericBeanDefinition.AUTOWIRE_BY_TYPE);
        beanFactory.registerBeanDefinition(cls.getSimpleName(), definition);
    }

    public static void registerBeanDefinition(Class cls, Class fbCls, Object... args) {
        registerBeanDefinition(0, cls, fbCls, args);
    }

    public static  void registerBeanDefinitionAnnotatedWith(int order, Class aCls, Class fbCls, Function, Object[]> func) {
        set(order, () -> AccessibleHelp.consumerClasses(c -> {
            if (c.isAnnotationPresent(aCls)) registerBeanDefinition0(c, fbCls, func.apply(c));
            return 0;
        }, 0));
    }

    public static  void registerBeanDefinitionAnnotatedWith(Class aCls, Class fbCls, Function, Object[]> func) {
        registerBeanDefinitionAnnotatedWith(0, aCls, fbCls, func);
    }

    public static void registerBeanDefinitionChildes(int order, Class cls, Class fbCls, Function, Object[]> func) {
        set(order, () -> AccessibleHelp.consumerClasses(c -> {
            if (cls.isAssignableFrom(c)) registerBeanDefinition0(c, fbCls, func.apply(c));
            return 0;
        }, 0));
    }

    public static void registerBeanDefinitionChildes(Class cls, Class fbCls, Function, Object[]> func) {
        registerBeanDefinitionChildes(0, cls, fbCls, func);
    }

    public static Pattern API_PATTERN = Pattern.compile("\\$\\{[^{}]+?}");

    public static String getExpressionProperty(String s) {
        if (NullHelp.isBlank(s)) return s;
        String s0;
        while (!s.equals(s0 = getExpressionProperty0(s))) s = s0;
        return s;
    }

    private static String getExpressionProperty0(String s) {
        return RegexHelp.replace(s, API_PATTERN, matcher -> {
            String expression = matcher.group(0);
            int idx = expression.indexOf(':');
            if (idx == -1) return environment.getProperty(expression.substring(2, expression.length() - 1));
            String key = expression.substring(2, idx);
            String value = environment.getProperty(key);
            if (NullHelp.nonBlank(value) || environment.containsProperty(key)) return value;
            return environment.getProperty(expression.substring(idx + 1, expression.length() - 1));
        });
    }

    public static void setExpressionProperty(int order, String s, Consumer setter) {
        set(order, () -> setter.accept(getExpressionProperty(s)));
    }

    public static void setExpressionProperty(String s, Consumer setter) {
        setExpressionProperty(0, s, setter);
    }

    public static String getProperty(String key) {
        return environment.getProperty(key);
    }

    public static void setProperty(int order, String key, Consumer setter) {
        set(order, () -> setter.accept(getProperty(key)));
    }

    public static void setProperty(String key, Consumer setter) {
        setProperty(0, key, setter);
    }

    public static  void consumerBeanAnnotatedWith(int order, Class cls, BiConsumer beanConsumer) {
        set(order, () -> context.getBeansWithAnnotation(cls).forEach(beanConsumer));
    }

    public static  void consumerBeanAnnotatedWith(Class cls, BiConsumer beanConsumer) {
        consumerBeanAnnotatedWith(0, cls, beanConsumer);
    }

    public static void consumerBean(int order, Predicate beanNamePredicate, Predicate beanPredicate, BiConsumer beanConsumer) {
        set(order, () -> {
            for (String name : context.getBeanDefinitionNames()) {
                if (beanNamePredicate == null || beanNamePredicate.test(name)) {
                    Object bean = get(name);
                    if (bean == null) continue;
                    bean = getTargetBean(bean);
                    if (bean == null) continue;
                    if (beanPredicate == null || beanPredicate.test(bean)) beanConsumer.accept(name, bean);
                }
            }
        });
    }

    public static void consumerBean(Predicate beanNamePredicate, Predicate beanPredicate, BiConsumer beanConsumer) {
        consumerBean(0, beanNamePredicate, beanPredicate, beanConsumer);
    }

    public static void inject(int order, Predicate beanNamePredicate, Predicate beanPredicate, BiFunction valueFunc, boolean force) {
        consumerBean(order, beanNamePredicate, beanPredicate, (name, bean) -> AccessibleHelp.setField(bean, field -> {
            Object val;
            if (!force) {
                val = AccessibleHelp.getField(field, bean);
                if (val != null) return NullConstant.OBJECT;
            }

            val = valueFunc == null ? get(field.getType()) : valueFunc.apply(bean, field);
            if (val != null) return val;

            return NullConstant.OBJECT;
        }));
    }

    public static void inject(Predicate beanNamePredicate, Predicate beanPredicate, BiFunction valueFunc, boolean force) {
        inject(0, beanNamePredicate, beanPredicate, valueFunc, force);
    }

    public static void inject(int order, BiFunction valueFunc) {
        inject(order, name -> !name.startsWith("org.springframework"), null, valueFunc, false);
    }

    public static void inject(BiFunction valueFunc) {
        inject(0, valueFunc);
    }

    public static  T invoke(String className, String method, String[] typeNames, String[] strArgs) {
        Class cls = ClassLoaderHelp.load(className);
        ClientFailureMsg.requireNonNull(cls, "类%s不存在", className);
        Object bean = get(cls);
        ClientFailureMsg.requireNonNull(bean, "实例不存在,类:%s", className);
        Class[] ptypes;
        if (NullHelp.isEmpty(typeNames)) ptypes = ArrayConstant.EMPTY_CLASS_ARRAY;
        else {
            ptypes = new Class[typeNames.length];
            Arrays.setAll(ptypes, i -> ClassLoaderHelp.load(typeNames[i]));
        }
        Object[] args;
        if (NullHelp.isEmpty(ptypes)) args = ArrayConstant.EMPTY_OBJECT_ARRAY;
        else {
            ClientFailureMsg.requireNonEmpty(strArgs, "缺少参数");
            ClientFailureMsg.requireNon(strArgs.length != ptypes.length, "参数类型与值个数不一致");
            args = new Object[ptypes.length];
            Arrays.setAll(args, i -> {
                Object obj = FieldSetter.parse(strArgs[i], ptypes[i]);
                if (obj != null && obj != NullConstant.OBJECT) return obj;
                return JSON.parseObject(strArgs[i], ptypes[i]);
            });
        }
        return AccessibleCacheHelp.invoke(bean, method, ptypes, args);
    }
}
    

    

    

            

    

            



    
    






    
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