/*
 *
 *    Copyright (c) 2022 Project CHIP Authors
 *    All rights reserved.
 *
 *    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 "AppTask.h"

#include "AppConfig.h"
#include "AppEvent.h"
#include "ButtonManager.h"
#include "LEDWidget.h"
#include "binding-handler.h"
#include <app/server/OnboardingCodesUtil.h>
#include <app/server/Server.h>

#include "ThreadUtil.h"

#include <app-common/zap-generated/attribute-id.h>
#include <app-common/zap-generated/attribute-type.h>
#include <app/util/attribute-storage.h>

#include <credentials/DeviceAttestationCredsProvider.h>
#include <credentials/examples/DeviceAttestationCredsExample.h>

#if CONFIG_CHIP_OTA_REQUESTOR
#include "OTAUtil.h"
#endif

#include <zephyr/logging/log.h>
#include <zephyr/zephyr.h>

LOG_MODULE_DECLARE(app);

namespace {

constexpr int kAppEventQueueSize      = 10;
constexpr uint8_t kButtonPushEvent    = 1;
constexpr uint8_t kButtonReleaseEvent = 0;

K_MSGQ_DEFINE(sAppEventQueue, sizeof(AppEvent), kAppEventQueueSize, alignof(AppEvent));

LEDWidget sStatusLED;

Button sFactoryResetButton;
Button sBleAdvStartButton;

bool sIsThreadProvisioned = false;
bool sIsThreadEnabled     = false;
bool sIsThreadAttached    = false;
bool sHaveBLEConnections  = false;

} // namespace

using namespace ::chip;
using namespace ::chip::Credentials;
using namespace ::chip::DeviceLayer;
using namespace ::chip::DeviceLayer::Internal;

AppTask AppTask::sAppTask;

constexpr EndpointId kNetworkCommissioningEndpointSecondary = 0xFFFE;

CHIP_ERROR AppTask::Init()
{
    CHIP_ERROR ret;

    LOG_INF("Current Software Version: %u, %s", CHIP_DEVICE_CONFIG_DEVICE_SOFTWARE_VERSION,
            CHIP_DEVICE_CONFIG_DEVICE_SOFTWARE_VERSION_STRING);

    // Initialize status LED
    LEDWidget::InitGpio(SYSTEM_STATE_LED_PORT);
    sStatusLED.Init(SYSTEM_STATE_LED_PIN);

    UpdateStatusLED();

    InitButtons();

    // Init ZCL Data Model and start server
    static chip::CommonCaseDeviceServerInitParams initParams;
    (void) initParams.InitializeStaticResourcesBeforeServerInit();
    chip::Server::GetInstance().Init(initParams);

    // Initialize device attestation config
    SetDeviceAttestationCredentialsProvider(Examples::GetExampleDACProvider());

#if CONFIG_CHIP_OTA_REQUESTOR
    InitBasicOTARequestor();
#endif

    // We only have network commissioning on endpoint 0.
    // Set up a valid Network Commissioning cluster on endpoint 0 is done in
    // src/platform/OpenThread/GenericThreadStackManagerImpl_OpenThread.cpp
    emberAfEndpointEnableDisable(kNetworkCommissioningEndpointSecondary, false);

    ConfigurationMgr().LogDeviceConfig();

    // Configure Bindings
    ret = InitBindingHandlers();
    if (ret != CHIP_NO_ERROR)
    {
        LOG_ERR("InitBindingHandlers() failed");
        return ret;
    }

    PrintOnboardingCodes(chip::RendezvousInformationFlags(chip::RendezvousInformationFlag::kBLE));

    // Add CHIP event handler and start CHIP thread.
    // Note that all the initialization code should happen prior to this point to avoid data races
    // between the main and the CHIP threads.
    PlatformMgr().AddEventHandler(ChipEventHandler, 0);

    ret = ConnectivityMgr().SetBLEDeviceName("TelinkMinApp");
    if (ret != CHIP_NO_ERROR)
    {
        LOG_ERR("Fail to set BLE device name");
        return ret;
    }

    return CHIP_NO_ERROR;
}

CHIP_ERROR AppTask::StartApp()
{
    CHIP_ERROR err = Init();

    if (err != CHIP_NO_ERROR)
    {
        LOG_ERR("AppTask.Init() failed");
        return err;
    }

    AppEvent event = {};

    while (true)
    {
        int ret = k_msgq_get(&sAppEventQueue, &event, K_MSEC(10));

        while (!ret)
        {
            DispatchEvent(&event);
            ret = k_msgq_get(&sAppEventQueue, &event, K_NO_WAIT);
        }

        sStatusLED.Animate();
    }
}

void AppTask::FactoryResetButtonEventHandler(void)
{
    AppEvent event;

    event.Type               = AppEvent::kEventType_Button;
    event.ButtonEvent.Action = kButtonPushEvent;
    event.Handler            = FactoryResetHandler;
    sAppTask.PostEvent(&event);
}

void AppTask::FactoryResetHandler(AppEvent * aEvent)
{
    LOG_INF("Factory Reset triggered.");
    chip::Server::GetInstance().ScheduleFactoryReset();
}

void AppTask::StartBleAdvButtonEventHandler(void)
{
    AppEvent event;

    event.Type               = AppEvent::kEventType_Button;
    event.ButtonEvent.Action = kButtonPushEvent;
    event.Handler            = StartBleAdvHandler;
    sAppTask.PostEvent(&event);
}

void AppTask::StartBleAdvHandler(AppEvent * aEvent)
{
    LOG_INF("BLE advertising start button pressed");

    // Don't allow on starting Matter service BLE advertising after Thread provisioning.
    if (ConnectivityMgr().IsThreadProvisioned())
    {
        LOG_INF("Matter service BLE advertising not started - device is commissioned to a Thread network.");
        return;
    }

    if (ConnectivityMgr().IsBLEAdvertisingEnabled())
    {
        LOG_INF("BLE advertising is already enabled");
        return;
    }

    if (chip::Server::GetInstance().GetCommissioningWindowManager().OpenBasicCommissioningWindow() != CHIP_NO_ERROR)
    {
        LOG_ERR("OpenBasicCommissioningWindow() failed");
    }
}

void AppTask::UpdateStatusLED()
{
    if (sIsThreadProvisioned && sIsThreadEnabled)
    {
        if (sIsThreadAttached)
        {
            sStatusLED.Blink(950, 50);
        }
        else
        {
            sStatusLED.Blink(100, 100);
        }
    }
    else
    {
        sStatusLED.Blink(50, 950);
    }
}

void AppTask::ChipEventHandler(const ChipDeviceEvent * event, intptr_t /* arg */)
{
    switch (event->Type)
    {
    case DeviceEventType::kCHIPoBLEAdvertisingChange:
        sHaveBLEConnections = ConnectivityMgr().NumBLEConnections() != 0;
        UpdateStatusLED();
        break;
    case DeviceEventType::kThreadStateChange:
        sIsThreadProvisioned = ConnectivityMgr().IsThreadProvisioned();
        sIsThreadEnabled     = ConnectivityMgr().IsThreadEnabled();
        sIsThreadAttached    = ConnectivityMgr().IsThreadAttached();
        UpdateStatusLED();
        break;
    case DeviceEventType::kThreadConnectivityChange:
#if CONFIG_CHIP_OTA_REQUESTOR
        if (event->ThreadConnectivityChange.Result == kConnectivity_Established)
        {
            InitBasicOTARequestor();
        }
#endif
        break;
    default:
        break;
    }
}

void AppTask::PostEvent(AppEvent * aEvent)
{
    if (!aEvent)
        return;
    if (k_msgq_put(&sAppEventQueue, aEvent, K_NO_WAIT) != 0)
    {
        LOG_INF("Failed to post event to app task event queue");
    }
}

void AppTask::DispatchEvent(AppEvent * aEvent)
{
    if (!aEvent)
        return;
    if (aEvent->Handler)
    {
        aEvent->Handler(aEvent);
    }
    else
    {
        LOG_INF("Event received with no handler. Dropping event.");
    }
}

void AppTask::InitButtons(void)
{
    sFactoryResetButton.Configure(BUTTON_PORT, BUTTON_PIN_3, BUTTON_PIN_1, FactoryResetButtonEventHandler);
    sBleAdvStartButton.Configure(BUTTON_PORT, BUTTON_PIN_4, BUTTON_PIN_2, StartBleAdvButtonEventHandler);

    ButtonManagerInst().AddButton(sFactoryResetButton);
    ButtonManagerInst().AddButton(sBleAdvStartButton);
}