/****************************************************************************
 Copyright (c) 2010-2012 cocos2d-x.org
 Copyright (c) 2013-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2022 Xiamen Yaji Software Co., Ltd.

 http://www.cocos.com

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated engine source code (the "Software"), a limited,
 worldwide, royalty-free, non-assignable, revocable and non-exclusive license
 to use Cocos Creator solely to develop games on your target platforms. You shall
 not use Cocos Creator software for developing other software or tools that's
 used for developing games. You are not granted to publish, distribute,
 sublicense, and/or sell copies of Cocos Creator.

 The software or tools in this License Agreement are licensed, not sold.
 Xiamen Yaji Software Co., Ltd. reserves all rights not expressly granted to you.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
****************************************************************************/

#include "platform/java/jni/JniHelper.h"
#if ANDROID
    #include <android/log.h>
#else
    #include "cocos/base/Log.h"
#endif
#include <pthread.h>
#include <cstring>

#include "base/UTF8.h"

#define CC_CACHE_CLASS_ID 0

#if ANDROID
    #define LOG_TAG   "JniHelper"
    #define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__)
    #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__)
#else
    #define LOGD(...) CC_LOG_DEBUG(__VA_ARGS__)
    #define LOGE(...) CC_LOG_ERROR(__VA_ARGS__)
#endif

namespace {
pthread_key_t       g_key; // NOLINT(readability-identifier-naming)
class JClassWrapper final {
public:
    explicit JClassWrapper(jclass kls) {
        if (kls) {
            _globalKls = static_cast<jclass>(cc::JniHelper::getEnv()->NewGlobalRef(static_cast<jobject>(kls)));
        }
    }
    ~JClassWrapper() {
        if (_globalKls) {
            cc::JniHelper::getEnv()->DeleteGlobalRef(_globalKls);
        }
        _globalKls = nullptr;
    }
    jclass operator*() const {
        return _globalKls;
    }

private:
    jclass _globalKls = {};
};
#if CC_CACHE_CLASS_ID
std::unordered_map<const char *, JClassWrapper> _cachedJClasses;
#endif
}; // namespace

jclass _getClassID(const char *className) { // NOLINT
    if (nullptr == className) {
        return nullptr;
    }
#if CC_CACHE_CLASS_ID
    auto it = _cachedJClasses.find(className);
    if (it != _cachedJClasses.end()) {
        return *it->second;
    }
#endif

    JNIEnv *env = cc::JniHelper::getEnv();

    jstring jstrClassName = env->NewStringUTF(className);

    auto *klassObj = static_cast<jclass>(env->CallObjectMethod(cc::JniHelper::classloader,
                                                               cc::JniHelper::loadclassMethodMethodId,
                                                               jstrClassName));

    if (nullptr == klassObj || env->ExceptionCheck()) {
        LOGE("Classloader failed to find class of %s", className);
        if (env->ExceptionCheck()) {
            env->ExceptionDescribe();
        }
        env->ExceptionClear();
        klassObj = nullptr;
    }

    ccDeleteLocalRef(env, jstrClassName);
    //    LOGE("1. delete 0x%p", jstrClassName);
#if CC_CACHE_CLASS_ID
    if (klassObj) {
        _cachedJClasses.emplace(className, klassObj);
    }
#endif
    return klassObj;
}

void cbDetachCurrentThread(void * /*a*/) {
    cc::JniHelper::getJavaVM()->DetachCurrentThread();
}

namespace cc {
jmethodID             JniHelper::loadclassMethodMethodId = nullptr;
jobject               JniHelper::classloader             = nullptr;
std::function<void()> JniHelper::classloaderCallback     = nullptr;
jobject               JniHelper::sActivity               = nullptr;
JavaVM *              JniHelper::sJavaVM                 = nullptr;

JavaVM *JniHelper::getJavaVM() {
    pthread_t thisthread = pthread_self();
    LOGD("JniHelper::getJavaVM(), pthread_self() = %ld", thisthread);
    return JniHelper::sJavaVM;
}

void JniHelper::init(JNIEnv *env, jobject activity) {
    env->GetJavaVM(&JniHelper::sJavaVM);
    JniHelper::sActivity = activity;

    pthread_key_create(&g_key, cbDetachCurrentThread);
    auto ok = JniHelper::setClassLoaderFrom(activity);
    CC_ASSERT(ok);
}

JNIEnv *JniHelper::cacheEnv() {
    JavaVM *jvm = JniHelper::sJavaVM;
    JNIEnv *env = nullptr;
    // get jni environment
    jint ret = jvm->GetEnv(reinterpret_cast<void **>(&env), JNI_VERSION_1_4);

    switch (ret) {
        case JNI_OK:
            // Success!
            pthread_setspecific(g_key, env);
            return env;

        case JNI_EDETACHED:
            // Thread not attached
#if CC_PLATFORM == CC_PLATFORM_ANDROID
            if (jvm->AttachCurrentThread(&env, nullptr) < 0) {
#else
            if (jvm->AttachCurrentThread(reinterpret_cast<void **>(&env), nullptr) < 0) {
#endif
                LOGE("Failed to get the environment using AttachCurrentThread()");

                return nullptr;
            } else {
                // Success : Attached and obtained JNIEnv!
                pthread_setspecific(g_key, env);
                return env;
            }

        case JNI_EVERSION:
            // Cannot recover from this error
            LOGE("JNI interface version 1.4 not supported");
        default:
            LOGE("Failed to get the environment using GetEnv()");
            return nullptr;
    }
}

JNIEnv *JniHelper::getEnv() {
    auto *env = static_cast<JNIEnv *>(pthread_getspecific(g_key));
    if (env == nullptr) {
        env = JniHelper::cacheEnv();
    }
    return env;
}

jobject JniHelper::getActivity() {
    return sActivity;
}

#if CC_PLATFORM == CC_PLATFORM_OHOS
bool JniHelper::setClassLoaderFrom(jobject activityinstance) {
    JniMethodInfo getclassloaderMethod;
    if (!JniHelper::getMethodInfoDefaultClassLoader(getclassloaderMethod,
                                                    "ohos/app/AbilityContext",
                                                    "getClassloader", // typo ?
                                                    "()Ljava/lang/ClassLoader;")) {
        return false;
    }

    jobject klassLoader = cc::JniHelper::getEnv()->CallObjectMethod(activityinstance,
                                                                    getclassloaderMethod.methodID);

    if (nullptr == klassLoader) {
        return false;
    }

    JniMethodInfo loadClass;
    if (!JniHelper::getMethodInfoDefaultClassLoader(loadClass,
                                                    "java/lang/ClassLoader",
                                                    "loadClass",
                                                    "(Ljava/lang/String;)Ljava/lang/Class;")) {
        return false;
    }

    JniHelper::classloader             = cc::JniHelper::getEnv()->NewGlobalRef(klassLoader);
    JniHelper::loadclassMethodMethodId = loadClass.methodID;
    JniHelper::sActivity               = cc::JniHelper::getEnv()->NewGlobalRef(activityinstance);
    if (JniHelper::classloaderCallback != nullptr) {
        JniHelper::classloaderCallback();
    }

    return true;
}
#elif CC_PLATFORM == CC_PLATFORM_ANDROID
bool JniHelper::setClassLoaderFrom(jobject activityinstance) {
    JniMethodInfo getClassloaderMethod;
    if (!JniHelper::getMethodInfoDefaultClassLoader(getClassloaderMethod,
                                                    "android/content/Context",
                                                    "getClassLoader",
                                                    "()Ljava/lang/ClassLoader;")) {
        return false;
    }

    jobject classLoader = cc::JniHelper::getEnv()->CallObjectMethod(activityinstance,
                                                                    getClassloaderMethod.methodID);

    if (nullptr == classLoader) {
        return false;
    }

    JniMethodInfo loadClass;
    if (!JniHelper::getMethodInfoDefaultClassLoader(loadClass,
                                                    "java/lang/ClassLoader",
                                                    "loadClass",
                                                    "(Ljava/lang/String;)Ljava/lang/Class;")) {
        return false;
    }

    JniHelper::classloader = cc::JniHelper::getEnv()->NewGlobalRef(classLoader);
    JniHelper::loadclassMethodMethodId = loadClass.methodID;
    JniHelper::sActivity = cc::JniHelper::getEnv()->NewGlobalRef(activityinstance);
    if (JniHelper::classloaderCallback != nullptr) {
        JniHelper::classloaderCallback();
    }

    return true;
}
#endif

bool JniHelper::getStaticMethodInfo(JniMethodInfo &methodinfo,
                                    const char *   className,
                                    const char *   methodName,
                                    const char *   paramCode) {
    if ((nullptr == className) ||
        (nullptr == methodName) ||
        (nullptr == paramCode)) {
        return false;
    }

    JNIEnv *env = JniHelper::getEnv();
    if (!env) {
        LOGE("Failed to get JNIEnv");
        return false;
    }

    jclass classID = _getClassID(className);
    if (!classID) {
        LOGE("Failed to find class %s", className);
        env->ExceptionClear();
        return false;
    }

    jmethodID methodID = env->GetStaticMethodID(classID, methodName, paramCode);
    if (!methodID) {
        LOGE("Failed to find static method id of %s", methodName);
        env->ExceptionClear();
        return false;
    }

    methodinfo.classID  = classID;
    methodinfo.env      = env;
    methodinfo.methodID = methodID;
    return true;
}

//NOLINTNEXTLINE
bool JniHelper::getMethodInfoDefaultClassLoader(JniMethodInfo &methodinfo,
                                                const char *   className,
                                                const char *   methodName,
                                                const char *   paramCode) {
    if ((nullptr == className) ||
        (nullptr == methodName) ||
        (nullptr == paramCode)) {
        return false;
    }

    JNIEnv *env = JniHelper::getEnv();
    if (!env) {
        return false;
    }

    jclass classID = env->FindClass(className);
    if (!classID) {
        LOGE("Failed to find class %s", className);
        env->ExceptionClear();
        return false;
    }

    jmethodID methodID = env->GetMethodID(classID, methodName, paramCode);
    if (!methodID) {
        LOGE("Failed to find method id of %s", methodName);
        env->ExceptionClear();
        return false;
    }

    methodinfo.classID  = classID;
    methodinfo.env      = env;
    methodinfo.methodID = methodID;

    return true;
}

bool JniHelper::getMethodInfo(JniMethodInfo &methodinfo,
                              const char *   className,
                              const char *   methodName,
                              const char *   paramCode) {
    if ((nullptr == className) ||
        (nullptr == methodName) ||
        (nullptr == paramCode)) {
        return false;
    }

    JNIEnv *env = JniHelper::getEnv();
    if (!env) {
        return false;
    }

    jclass classID = _getClassID(className);
    if (!classID) {
        LOGE("Failed to find class %s", className);
        env->ExceptionClear();
        return false;
    }

    jmethodID methodID = env->GetMethodID(classID, methodName, paramCode);
    if (!methodID) {
        LOGE("Failed to find method id of %s", methodName);
        env->ExceptionClear();
        return false;
    }

    methodinfo.classID  = classID;
    methodinfo.env      = env;
    methodinfo.methodID = methodID;

    return true;
}

std::string JniHelper::jstring2string(jstring jstr) {
    if (jstr == nullptr) {
        return "";
    }

    JNIEnv *env = JniHelper::getEnv();
    if (!env) {
        return "";
    }

    std::string strValue = cc::StringUtils::getStringUTFCharsJNI(env, jstr);

    return strValue;
}

jstring JniHelper::convert(JniHelper::LocalRefMapType *localRefs, cc::JniMethodInfo *t, const char *x) {
    jstring ret = nullptr;
    if (x) {
        ret = cc::StringUtils::newStringUTFJNI(t->env, x);
    }

    (*localRefs)[t->env].push_back(ret);
    return ret;
}

jstring JniHelper::convert(JniHelper::LocalRefMapType *localRefs, cc::JniMethodInfo *t, const std::string &x) {
    return convert(localRefs, t, x.c_str());
}

jobject JniHelper::convert(JniHelper::LocalRefMapType *localRefs, cc::JniMethodInfo *t, const std::vector<std::string> &x) {
    jclass       stringClass = _getClassID("java/lang/String");
    jobjectArray ret         = t->env->NewObjectArray(x.size(), stringClass, nullptr);
    for (auto i = 0; i < x.size(); i++) {
        jstring jstr = cc::StringUtils::newStringUTFJNI(t->env, x[i]);
        t->env->SetObjectArrayElement(ret, i, jstr);
        t->env->DeleteLocalRef(jstr);
    }
    (*localRefs)[t->env].push_back(ret);
    return ret;
}

void JniHelper::deleteLocalRefs(JNIEnv *env, JniHelper::LocalRefMapType *localRefs) {
    if (!env) {
        return;
    }

    for (const auto &ref : (*localRefs)[env]) {
        ccDeleteLocalRef(env, ref);
        //        LOGE("2. delete 0x%p", ref);
    }
    (*localRefs)[env].clear();
}

void JniHelper::reportError(const std::string &className, const std::string &methodName, const std::string &signature) {
    LOGE("Failed to find static java method. Class name: %s, method name: %s, signature: %s ", className.c_str(), methodName.c_str(), signature.c_str());
}

} //namespace cc