// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "device/usb/usb_device.h"

#include "base/guid.h"
#include "device/usb/usb_device_handle.h"
#include "device/usb/webusb_descriptors.h"

namespace device {

UsbDevice::Observer::~Observer() {}

void UsbDevice::Observer::OnDeviceRemoved(scoped_refptr<UsbDevice> device) {}

UsbDevice::UsbDevice(uint16_t usb_version,
                     uint8_t device_class,
                     uint8_t device_subclass,
                     uint8_t device_protocol,
                     uint16_t vendor_id,
                     uint16_t product_id,
                     uint16_t device_version,
                     const base::string16& manufacturer_string,
                     const base::string16& product_string,
                     const base::string16& serial_number)
    : usb_version_(usb_version),
      device_version_(device_version),
      manufacturer_string_(manufacturer_string),
      product_string_(product_string),
      serial_number_(serial_number),
      guid_(base::GenerateGUID()),
      device_class_(device_class),
      device_subclass_(device_subclass),
      device_protocol_(device_protocol),
      vendor_id_(vendor_id),
      product_id_(product_id) {}

UsbDevice::~UsbDevice() {
}

void UsbDevice::CheckUsbAccess(const ResultCallback& callback) {
  // By default assume that access to the device is allowed. This is implemented
  // on Chrome OS by checking with permission_broker.
  callback.Run(true);
}

void UsbDevice::RequestPermission(const ResultCallback& callback) {
  // By default assume that access to the device is allowed. This is implemented
  // on Android by calling android.hardware.usb.UsbManger.requestPermission.
  callback.Run(true);
}

bool UsbDevice::permission_granted() const {
  return true;
}

void UsbDevice::AddObserver(Observer* observer) {
  observer_list_.AddObserver(observer);
}

void UsbDevice::RemoveObserver(Observer* observer) {
  observer_list_.RemoveObserver(observer);
}

void UsbDevice::ActiveConfigurationChanged(int configuration_value) {
  for (const auto& config : configurations_) {
    if (config.configuration_value == configuration_value) {
      active_configuration_ = &config;
      return;
    }
  }
}

void UsbDevice::NotifyDeviceRemoved() {
  for (auto& observer : observer_list_)
    observer.OnDeviceRemoved(this);
}

void UsbDevice::OnDisconnect() {
  // Swap out the handle list as HandleClosed() will try to modify it.
  std::list<UsbDeviceHandle*> handles;
  handles.swap(handles_);
  for (auto* handle : handles_)
    handle->Close();
}

void UsbDevice::HandleClosed(UsbDeviceHandle* handle) {
  handles_.remove(handle);
}

}  // namespace device