/*
 * Copyright (c) 2023 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 "keys_input_device.h"

#include <thread>
#include "log/log.h"
#include "updater_event.h"

namespace Updater {
enum KeyUpDownEvent {
    EVENT_KEY_UP_VALUE,
    EVENT_KEY_DOWN_VALUE
};

KeysInputDevice &KeysInputDevice::GetInstance()
{
    static KeysInputDevice instance;
    return instance;
}

bool KeysInputDevice::Read(OHOS::DeviceData& data)
{
    data.keyId = lastKeyId_;
    data.state = keyState_;
    keyState_ = OHOS::INVALID_KEY_STATE;
    return false;
}

void KeysInputDevice::OnLongKeyPressDown()
{
    static int downCount = 0;
    ++downCount;
    timerStop_ = false;
    using namespace std::literals::chrono_literals;
    std::thread t { [this, lastdownCount = downCount] () {
        constexpr auto threshold = 2s;
        std::this_thread::sleep_for(threshold);
        // When the downCount of the last power key press changes,
        // it means that the last press has been released before
        // the timeout, then you can exit the callback directly
        if (timerStop_ || lastdownCount != downCount) {
            return;
        }
        UpdaterEvent::Invoke(UPDATER_POWER_VOLUME_DOWN_EVENT);
    }};
    t.detach();
}

void KeysInputDevice::OnLongKeyPressUp()
{
    // no need to judge whether in progress page,
    // because may press power key in progress
    // page and release power key in other page
    timerStop_ = true;
    UpdaterEvent::Invoke(UPDATER_POWER_VOLUME_UP_EVENT);
}

/*
 * LONG_PRESS_POWER_ONLY_TYPE : press power key to show long press warning
 * others : press power key and volume key to show long press warning
 */
void KeysInputDevice::SetLongPressType(const std::string &type)
{
    type_ = type;
}

void KeysInputDevice::PowerDownPress(const input_event &ev)
{
    if (ev.code != KEY_POWER) {
        return;
    }
    bool down = ev.value == EVENT_KEY_DOWN_VALUE;
    LOG(INFO) << "power down " << ev.code;
    if (down) {
        OnLongKeyPressDown();
    } else {
        OnLongKeyPressUp();
    }
}

void KeysInputDevice::PowerVolumeDownPress(const input_event &ev)
{
    static bool powerDown = false;
    static bool volumeDown = false;
    bool down = ev.value == EVENT_KEY_DOWN_VALUE;
    if (ev.code == KEY_POWER) {
        powerDown = down;
    } else if (ev.code == KEY_VOLUMEDOWN) {
        volumeDown = down;
    }
    if (powerDown && volumeDown) {
        OnLongKeyPressDown();
    } else if (!down && (ev.code == KEY_POWER || ev.code == KEY_VOLUMEDOWN)) {
        OnLongKeyPressUp();
    }
}

int KeysInputDevice::HandleKeyEvent(const input_event &ev, uint32_t type)
{
    if (ev.type != EV_KEY || ev.code > KEY_MAX) {
        return 0;
    }
    if (ev.code == BTN_TOUCH || ev.code == BTN_TOOL_FINGER) {
        return 0;
    }
    if (ev.code == BTN_MOUSE || ev.code == BTN_LEFT || ev.code == BTN_RIGHT || ev.code == BTN_MIDDLE) {
        return 0;
    }

    // KEY_VOLUMEDOWN = 114, KEY_VOLUMEUP = 115, KEY_POWER = 116
    if (ev.code == KEY_VOLUMEDOWN || ev.code == KEY_VOLUMEUP || ev.code == KEY_POWER) {
        keyState_ = (ev.value == EVENT_KEY_DOWN_VALUE) ?
            OHOS::InputDevice::STATE_PRESS : OHOS::InputDevice::STATE_RELEASE;
    } else {
        keyState_ = ev.value;
    }

    lastKeyId_ = ev.code;
    if (type_ == LONG_PRESS_POWER_ONLY_TYPE) {
        PowerDownPress(ev);
    } else {
        PowerVolumeDownPress(ev);
    }
    return 0;
}
} // namespace Updater