/*
 * 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.
 */

#pragma once

#include "InputState.h"

#include <binder/IBinder.h>
#include <input/Input.h>
#include <input/InputTransport.h>
#include <utils/RefBase.h>
#include <utils/StrongPointer.h>

#include <deque>
#include <memory>
#include <string>

#include "Entry.h"
#include "InputState.h"

namespace android::inputdispatcher {

struct DispatchEntry;

/* Manages the dispatch state associated with a single input channel. */
class Connection {
public:
    enum class Status {
        // Everything is peachy.
        NORMAL,
        // An unrecoverable communication error has occurred.
        BROKEN,
        // The input channel has been unregistered.
        ZOMBIE,

        ftl_first = NORMAL,
        ftl_last = ZOMBIE,
    };

    Status status;
    // True if this connection is for a focus monitor, which behaves differently in various ways and
    // is usually associated with a display and not with a window.
    bool isFocusMonitor;
    InputPublisher inputPublisher;
    InputState inputState;

    // True if this connection is responsive.
    // If this connection is not responsive, avoid publishing more events to it until the
    // application consumes some of the input.
    bool responsive = true;

    // Queue of events that need to be published to the connection.
    std::deque<std::unique_ptr<DispatchEntry>> outboundQueue;

    // Queue of events that have been published to the connection but that have not
    // yet received a "finished" response from the application.
    std::deque<std::unique_ptr<DispatchEntry>> waitQueue;

    Connection(std::unique_ptr<InputChannel> inputChannel, bool isFocusMonitor,
               const IdGenerator& idGenerator);

    inline const std::string getInputChannelName() const {
        return inputPublisher.getChannel().getName();
    }

    sp<IBinder> getToken() const;
};

} // namespace android::inputdispatcher