/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * 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.
 */

//#define LOG_NDEBUG 0
#define LOG_TAG "android.hardware.cas@1.1-CasImpl"

#include <android/hardware/cas/1.1/ICasListener.h>
#include <media/cas/CasAPI.h>
#include <utils/Log.h>

#include "CasImpl.h"
#include "SharedLibrary.h"
#include "TypeConvert.h"

namespace android {
namespace hardware {
namespace cas {
namespace V1_1 {
namespace implementation {

CasImpl::CasImpl(const sp<ICasListener>& listener) : mListener(listener) {
    ALOGV("CTOR");
}

CasImpl::~CasImpl() {
    ALOGV("DTOR");
    release();
}

// static
void CasImpl::OnEvent(void* appData, int32_t event, int32_t arg, uint8_t* data, size_t size) {
    if (appData == NULL) {
        ALOGE("Invalid appData!");
        return;
    }
    CasImpl* casImpl = static_cast<CasImpl*>(appData);
    casImpl->onEvent(event, arg, data, size);
}

// static
void CasImpl::CallBackExt(void* appData, int32_t event, int32_t arg, uint8_t* data, size_t size,
                          const CasSessionId* sessionId) {
    if (appData == NULL) {
        ALOGE("Invalid appData!");
        return;
    }
    CasImpl* casImpl = static_cast<CasImpl*>(appData);
    casImpl->onEvent(sessionId, event, arg, data, size);
}

void CasImpl::init(const sp<SharedLibrary>& library, CasPlugin* plugin) {
    mLibrary = library;
    std::shared_ptr<CasPlugin> holder(plugin);
    std::atomic_store(&mPluginHolder, holder);
}

void CasImpl::onEvent(int32_t event, int32_t arg, uint8_t* data, size_t size) {
    if (mListener == NULL) {
        return;
    }

    HidlCasData eventData;
    if (data != NULL) {
        eventData.setToExternal(data, size);
    }

    mListener->onEvent(event, arg, eventData);
}

void CasImpl::onEvent(const CasSessionId* sessionId, int32_t event, int32_t arg, uint8_t* data,
                      size_t size) {
    if (mListener == NULL) {
        return;
    }

    HidlCasData eventData;
    if (data != NULL) {
        eventData.setToExternal(data, size);
    }

    if (sessionId != NULL) {
        mListener->onSessionEvent(*sessionId, event, arg, eventData);
    } else {
        mListener->onEvent(event, arg, eventData);
    }
}

Return<Status> CasImpl::setPrivateData(const HidlCasData& pvtData) {
    ALOGV("%s", __FUNCTION__);
    std::shared_ptr<CasPlugin> holder = std::atomic_load(&mPluginHolder);
    if (holder.get() == nullptr) {
        return toStatus(INVALID_OPERATION);
    }
    return toStatus(holder->setPrivateData(pvtData));
}

Return<void> CasImpl::openSession(openSession_cb _hidl_cb) {
    ALOGV("%s", __FUNCTION__);
    CasSessionId sessionId;

    std::shared_ptr<CasPlugin> holder = std::atomic_load(&mPluginHolder);
    status_t err = INVALID_OPERATION;
    if (holder.get() != nullptr) {
        err = holder->openSession(&sessionId);
        holder.reset();
    }

    _hidl_cb(toStatus(err), sessionId);

    return Void();
}

Return<Status> CasImpl::setSessionPrivateData(const HidlCasSessionId& sessionId,
                                              const HidlCasData& pvtData) {
    ALOGV("%s: sessionId=%s", __FUNCTION__, sessionIdToString(sessionId).c_str());
    std::shared_ptr<CasPlugin> holder = std::atomic_load(&mPluginHolder);
    if (holder.get() == nullptr) {
        return toStatus(INVALID_OPERATION);
    }
    return toStatus(holder->setSessionPrivateData(sessionId, pvtData));
}

Return<Status> CasImpl::closeSession(const HidlCasSessionId& sessionId) {
    ALOGV("%s: sessionId=%s", __FUNCTION__, sessionIdToString(sessionId).c_str());
    std::shared_ptr<CasPlugin> holder = std::atomic_load(&mPluginHolder);
    if (holder.get() == nullptr) {
        return toStatus(INVALID_OPERATION);
    }
    return toStatus(holder->closeSession(sessionId));
}

Return<Status> CasImpl::processEcm(const HidlCasSessionId& sessionId, const HidlCasData& ecm) {
    ALOGV("%s: sessionId=%s", __FUNCTION__, sessionIdToString(sessionId).c_str());
    std::shared_ptr<CasPlugin> holder = std::atomic_load(&mPluginHolder);
    if (holder.get() == nullptr) {
        return toStatus(INVALID_OPERATION);
    }

    return toStatus(holder->processEcm(sessionId, ecm));
}

Return<Status> CasImpl::processEmm(const HidlCasData& emm) {
    ALOGV("%s", __FUNCTION__);
    std::shared_ptr<CasPlugin> holder = std::atomic_load(&mPluginHolder);
    if (holder.get() == nullptr) {
        return toStatus(INVALID_OPERATION);
    }

    return toStatus(holder->processEmm(emm));
}

Return<Status> CasImpl::sendEvent(int32_t event, int32_t arg, const HidlCasData& eventData) {
    ALOGV("%s", __FUNCTION__);
    std::shared_ptr<CasPlugin> holder = std::atomic_load(&mPluginHolder);
    if (holder.get() == nullptr) {
        return toStatus(INVALID_OPERATION);
    }

    status_t err = holder->sendEvent(event, arg, eventData);
    return toStatus(err);
}

Return<Status> CasImpl::sendSessionEvent(const HidlCasSessionId& sessionId, int32_t event,
                                         int32_t arg, const HidlCasData& eventData) {
    ALOGV("%s", __FUNCTION__);
    std::shared_ptr<CasPlugin> holder = std::atomic_load(&mPluginHolder);
    if (holder.get() == nullptr) {
        return toStatus(INVALID_OPERATION);
    }

    status_t err = holder->sendSessionEvent(sessionId, event, arg, eventData);
    return toStatus(err);
}

Return<Status> CasImpl::provision(const hidl_string& provisionString) {
    ALOGV("%s: provisionString=%s", __FUNCTION__, provisionString.c_str());
    std::shared_ptr<CasPlugin> holder = std::atomic_load(&mPluginHolder);
    if (holder.get() == nullptr) {
        return toStatus(INVALID_OPERATION);
    }

    return toStatus(holder->provision(String8(provisionString.c_str())));
}

Return<Status> CasImpl::refreshEntitlements(int32_t refreshType, const HidlCasData& refreshData) {
    ALOGV("%s", __FUNCTION__);
    std::shared_ptr<CasPlugin> holder = std::atomic_load(&mPluginHolder);
    if (holder.get() == nullptr) {
        return toStatus(INVALID_OPERATION);
    }

    status_t err = holder->refreshEntitlements(refreshType, refreshData);
    return toStatus(err);
}

Return<Status> CasImpl::release() {
    ALOGV("%s: plugin=%p", __FUNCTION__, mPluginHolder.get());

    std::shared_ptr<CasPlugin> holder(nullptr);
    std::atomic_store(&mPluginHolder, holder);

    return Status::OK;
}

}  // namespace implementation
}  // namespace V1_1
}  // namespace cas
}  // namespace hardware
}  // namespace android