/*
 * Copyright (c) 2022 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.
 */

#include "load_fuzzer.h"

#include <cstring>
#include <securec.h>
#include <ui/rs_surface_node.h>

#include "nweb.h"
#include "nweb_adapter_helper.h"

using namespace OHOS::Rosen;

namespace OHOS {
    std::shared_ptr<OHOS::NWeb::NWeb> g_nweb = nullptr;
    sptr<Surface> g_surface = nullptr;
    std::unordered_map<std::string, std::string> g_argsMap;
    const std::string ARG_URL = "--url";
    const std::string ARG_DUMP = "--dump-path";
    const std::string ARG_FRAME_INFO = "--frame-info";
    const std::string ARG_ADD_WEB_ENGINE_ARG = "--add-args";
    const std::string ARG_DELETE_WEB_ENGINE_ARG = "--delete-args";
    const std::string ARG_MULTI_RENDER_PROCESS = "--multi-renderer-process";
    const std::string ARG_NWEB_TEST_MOCK_BUNDLEPATH = "--bundle-installation-dir";
    const std::string MOCK_INSTALLATION_DIR = "/data/app/el1/bundle/public/com.ohos.nweb";
    const std::string ARG_WIDTH = "--width";
    const std::string ARG_HEIGHT = "--height";

    bool HasArg(const std::string &arg)
    {
        return (!g_argsMap.empty()) && (g_argsMap.find(arg) != g_argsMap.end());
    }

    std::string GetArgValue(const std::string &arg)
    {
        if (!HasArg(arg)) {
            return "";
        }
        return g_argsMap.at(arg);
    }

    std::list<std::string> GetWebEngineArgs(const std::string &arg)
    {
        std::string webEngineArgValue = GetArgValue(arg);
        std::list<std::string> webEngineArgList;
        if (webEngineArgValue.empty()) {
            return webEngineArgList;
        }
        uint32_t start = 0;
        uint32_t pos = 0;
        while (pos < webEngineArgValue.size()) {
            if (webEngineArgValue[pos] == ',') {
                webEngineArgList.emplace_back(webEngineArgValue.substr(start, pos - start));
                pos++;
                start = pos;
            } else {
                pos++;
            }
        }
        webEngineArgList.emplace_back(webEngineArgValue.substr(start, pos - start));
        webEngineArgList.emplace_back(ARG_NWEB_TEST_MOCK_BUNDLEPATH + "=" + MOCK_INSTALLATION_DIR);
        return webEngineArgList;
    }

    OHOS::NWeb::NWebInitArgs GetInitArgs()
    {
        OHOS::NWeb::NWebInitArgs initArgs = {
            .dump_path = GetArgValue(ARG_DUMP),
            .frame_info_dump = HasArg(ARG_FRAME_INFO) ? true : false,
            .web_engine_args_to_add = GetWebEngineArgs(ARG_ADD_WEB_ENGINE_ARG),
            .web_engine_args_to_delete = GetWebEngineArgs(ARG_DELETE_WEB_ENGINE_ARG),
            .multi_renderer_process = HasArg(ARG_MULTI_RENDER_PROCESS) ? true : false,
        };
        return initArgs;
    }

    bool DoSomethingInterestingWithMyAPI(const uint8_t* data, size_t size)
    {
        if ((data == nullptr) || (size == 0)) {
            return true;
        }
        if (!g_surface) {
            RSSurfaceNodeConfig config;
            config.SurfaceNodeName = "webTestSurfaceName";
            auto surfaceNode = RSSurfaceNode::Create(config, false);
            if (surfaceNode == nullptr) {
                return false;
            }
            g_surface = surfaceNode->GetSurface();
            if (g_surface== nullptr) {
                return false;
            }
        }
        g_nweb = NWeb::NWebAdapterHelper::Instance().CreateNWeb(g_surface, GetInitArgs());
        if (g_nweb == nullptr) {
            return true;
        }
        std::string url((const char *)data, size);
        g_nweb->Load(url);
        return true;
    }
}

/* Fuzzer entry point */
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
    /* Run your code on data */
    OHOS::DoSomethingInterestingWithMyAPI(data, size);
    return 0;
}