/*
 * Copyright (c) 2024 Huawei Device Co., Ltd.
 * 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
 *
 *     http://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.
 */

/**
 * 实现步骤
 * 1.定义注册日志回调、关闭日志回调接口并实现
 * 2.实现自定义的日志处理函数HiLogCallbackFilter，供注册日志回调调用
 */

#include <fstream>
#include "napi/native_api.h"
#include "hilog/log.h"

const int GLOBAL_RESMGR = 0xFF00;
const char *TAG = "[testTag]";

#define MAX_LOG_LEN 512
char g_logToFilter[MAX_LOG_LEN] = {};      // 要过滤的日志内容
napi_env g_env;
napi_ref callbackRef = nullptr;         // ArkTs端回调函数的引用

//  自定义的日志处理函数
static void HiLogCallbackFilter(const LogType type, const LogLevel level, const unsigned int domain, const char *tag,
    const char *msg)
{
    std::string strMsg(msg, strlen(msg) + 1);
    //  过滤要查找的日志
    size_t foundIndex = strMsg.find(g_logToFilter);
    if (foundIndex != -1) {
        // ArkTS回调函数
        napi_value callback = nullptr;
        napi_get_reference_value(g_env, callbackRef, &callback);
        // 返回日志内容
        napi_value hilogArg;
        napi_create_string_utf8(g_env, msg, NAPI_AUTO_LENGTH, &hilogArg);
        napi_value ret;
        //  调用ArkTS端传入的回调函数
        napi_call_function(g_env, nullptr, callback, 1, &hilogArg, &ret);
    }
    return;
}

// 注册日志回调函数
static napi_value SetLogCallback(napi_env env, napi_callback_info info)
{
    size_t argc = 2;
    napi_value args[2] = {nullptr};
    napi_get_cb_info(env, info, &argc, args, nullptr, nullptr);
    // 解析要过滤的日志
    size_t logSize;
    napi_get_value_string_utf8(env, args[0], g_logToFilter, MAX_LOG_LEN, &logSize);

    // 解析ArkTS端的回调函数
    napi_valuetype valueType = napi_undefined;
    napi_typeof(env, args[1], &valueType);
    if (valueType != napi_function) {
        OH_LOG_Print(LOG_APP, LOG_ERROR, GLOBAL_RESMGR, TAG, "SetLogCallback fail，param[2] is not a function！");
        return nullptr;
    }
    // 创建ArkTS端回调函数的引用
    napi_create_reference(env, args[1], 1, &callbackRef);
    g_env = env;
    // 注册日志回调接口
    OH_LOG_SetCallback(HiLogCallbackFilter);
    OH_LOG_Print(LOG_APP, LOG_INFO, GLOBAL_RESMGR, TAG, "TestLogCallback SetCallback end");
    return nullptr;
}

// 关闭日志回调功能
static napi_value CancelLogCallback(napi_env env, napi_callback_info info)
{
    // 关闭日志回调
    OH_LOG_SetCallback(nullptr);
    OH_LOG_Print(LOG_APP, LOG_INFO, GLOBAL_RESMGR, TAG, "TestLogCallback CancelLogCallback end");
    // 删除回调函数引用
    napi_delete_reference(env, callbackRef);
    return nullptr;
}

EXTERN_C_START
static napi_value Init(napi_env env, napi_value exports)
{
    napi_property_descriptor desc[] = {
        {"setLogCallback", nullptr, SetLogCallback, nullptr, nullptr, nullptr, napi_default, nullptr},
        {"cancelLogCallback", nullptr, CancelLogCallback, nullptr, nullptr, nullptr, napi_default, nullptr}};
    napi_define_properties(env, exports, sizeof(desc) / sizeof(desc[0]), desc);
    return exports;
}
EXTERN_C_END

static napi_module demoModule = {
    .nm_version = 1,
    .nm_flags = 0,
    .nm_filename = nullptr,
    .nm_register_func = Init,
    .nm_modname = "logcallback",
    .nm_priv = ((void*)0),
    .reserved = { 0 },
};

extern "C" __attribute__((constructor)) void RegisterLogcallbackModule(void)
{
    napi_module_register(&demoModule);
}