/*
 * 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.
 */

#include "startability_fuzzer.h"

#include <cstddef>
#include <cstdint>

#include "ability_manager_client.h"
#include "ability_record.h"
#include "parcel.h"
#include "securec.h"
#include "want.h"

using namespace OHOS::AAFwk;
using namespace OHOS::AppExecFwk;

namespace OHOS {
namespace {
constexpr size_t U32_AT_SIZE = 4;
}
sptr<Token> GetFuzzAbilityToken()
{
    sptr<Token> token = nullptr;

    AbilityRequest abilityRequest;
    abilityRequest.appInfo.bundleName = "com.example.fuzzTest";
    abilityRequest.abilityInfo.name = "MainAbility";
    abilityRequest.abilityInfo.type = AbilityType::DATA;
    std::shared_ptr<AbilityRecord> abilityRecord = AbilityRecord::CreateAbilityRecord(abilityRequest);
    if (abilityRecord) {
        token = abilityRecord->GetToken();
    }

    return token;
}

bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
{
    auto abilityMgr = AbilityManagerClient::GetInstance();
    if (!abilityMgr) {
        return false;
    }

    // get token and connectCallback
    sptr<IRemoteObject> token = GetFuzzAbilityToken();
    if (!token) {
        std::cout << "Get ability token failed." << std::endl;
        return false;
    }

    // fuzz for want
    Parcel wantParcel;
    Want* want = nullptr;
    if (wantParcel.WriteBuffer(data, size)) {
        want = Want::Unmarshalling(wantParcel);
        if (want) {
            abilityMgr->StartAbility(*want);
        }
    }

    // fuzz for abilitysetting
    Parcel settingParcel;
    AbilityStartSetting* setting = nullptr;
    if (settingParcel.WriteBuffer(data, size)) {
        setting = AbilityStartSetting::Unmarshalling(settingParcel);
        if (want && setting) {
            abilityMgr->StartAbility(*want, *setting, token);
        }
    }

    // fuzz for startoptions
    Parcel optionParcel;
    StartOptions* options = nullptr;
    if (optionParcel.WriteBuffer(data, size)) {
        options = StartOptions::Unmarshalling(optionParcel);
        if (want && options) {
            abilityMgr->StartAbility(*want, *options, token);
        }
    }

    if (want) {
        delete want;
        want = nullptr;
    }
    if (setting) {
        delete setting;
        setting = nullptr;
    }
    if (options) {
        delete options;
        options = nullptr;
    }

    return true;
}
}

/* Fuzzer entry point */
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
    /* Run your code on data */
    if (data == nullptr) {
        std::cout << "invalid data" << std::endl;
        return 0;
    }

    /* Validate the length of size */
    if (size < OHOS::U32_AT_SIZE) {
        return 0;
    }

    char* ch = static_cast<char*>(malloc(size + 1));
    if (ch == nullptr) {
        std::cout << "malloc failed." << std::endl;
        return 0;
    }

    (void)memset_s(ch, size + 1, 0x00, size + 1);
    if (memcpy_s(ch, size, data, size) != EOK) {
        std::cout << "copy failed." << std::endl;
        free(ch);
        ch = nullptr;
        return 0;
    }

    OHOS::DoSomethingInterestingWithMyAPI(ch, size);
    free(ch);
    ch = nullptr;
    return 0;
}