// Copyright 2019 The Fuchsia 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 <fidl/fuchsia.io/cpp/wire.h>
#include <lib/fidl/llcpp/transaction.h>
#include <lib/fs-pty/service.h>
#include <lib/fs-pty/tty-connection-internal.h>
#include <lib/zx/channel.h>
#include <lib/zx/eventpair.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <threads.h>
#include <zircon/status.h>
#include <zircon/types.h>

#include <thread>

#include <fbl/algorithm.h>

namespace fs_pty::internal {

void DispatchPtyDeviceMessage(fidl::WireServer<fuchsia_hardware_pty::Device>* interface,
                              fidl::IncomingMessage& msg, fidl::Transaction* txn) {
  fidl::WireDispatch<fuchsia_hardware_pty::Device>(interface, std::move(msg), txn);
}

// Return ZX_ERR_NOT_SUPPORTED for all of the PTY things we don't actually support
void NullPtyDeviceImpl::OpenClient(OpenClientRequestView request,
                                   OpenClientCompleter::Sync& completer) {
  fidl::ServerBuffer<fuchsia_hardware_pty::Device::OpenClient> buf;
  completer.buffer(buf.view()).Reply(ZX_ERR_NOT_SUPPORTED);
}

void NullPtyDeviceImpl::ClrSetFeature(ClrSetFeatureRequestView request,
                                      ClrSetFeatureCompleter::Sync& completer) {
  fidl::ServerBuffer<fuchsia_hardware_pty::Device::ClrSetFeature> buf;
  completer.buffer(buf.view()).Reply(ZX_ERR_NOT_SUPPORTED, 0);
}

void NullPtyDeviceImpl::GetWindowSize(GetWindowSizeRequestView request,
                                      GetWindowSizeCompleter::Sync& completer) {
  fidl::ServerBuffer<fuchsia_hardware_pty::Device::GetWindowSize> buf;
  fuchsia_hardware_pty::wire::WindowSize wsz = {.width = 0, .height = 0};
  completer.buffer(buf.view()).Reply(ZX_ERR_NOT_SUPPORTED, wsz);
}

void NullPtyDeviceImpl::MakeActive(MakeActiveRequestView request,
                                   MakeActiveCompleter::Sync& completer) {
  fidl::ServerBuffer<fuchsia_hardware_pty::Device::MakeActive> buf;
  completer.buffer(buf.view()).Reply(ZX_ERR_NOT_SUPPORTED);
}

void NullPtyDeviceImpl::ReadEvents(ReadEventsRequestView request,
                                   ReadEventsCompleter::Sync& completer) {
  fidl::ServerBuffer<fuchsia_hardware_pty::Device::ReadEvents> buf;
  completer.buffer(buf.view()).Reply(ZX_ERR_NOT_SUPPORTED, 0);
}

void NullPtyDeviceImpl::SetWindowSize(SetWindowSizeRequestView request,
                                      SetWindowSizeCompleter::Sync& completer) {
  fidl::ServerBuffer<fuchsia_hardware_pty::Device::SetWindowSize> buf;
  completer.buffer(buf.view()).Reply(ZX_ERR_NOT_SUPPORTED);
}

// We need to provide these methods because |fuchsia.hardware.pty.Device| composes |fuchsia.io|.
// Assert in all of these, since these should be handled by fs::Connection before our
// HandleFsSpecificMessage() is called.

void NullPtyDeviceImpl::Read(ReadRequestView request, ReadCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::Write(WriteRequestView request, WriteCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::AdvisoryLock(AdvisoryLockRequestView request,
                                     AdvisoryLockCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::Clone(CloneRequestView request, CloneCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::Close(CloseRequestView request, CloseCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::Describe(DescribeRequestView request, DescribeCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::Describe2(Describe2RequestView request,
                                  Describe2Completer::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::GetAttr(GetAttrRequestView request, GetAttrCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::ReadAt(ReadAtRequestView request, ReadAtCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::WriteAt(WriteAtRequestView request, WriteAtCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::Seek(SeekRequestView request, SeekCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::Resize(ResizeRequestView request, ResizeCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::GetBackingMemory(GetBackingMemoryRequestView request,
                                         GetBackingMemoryCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::Sync(SyncRequestView request, SyncCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::SetAttr(SetAttrRequestView request, SetAttrCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::GetFlags(GetFlagsRequestView request, GetFlagsCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::SetFlags(SetFlagsRequestView request, SetFlagsCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

void NullPtyDeviceImpl::QueryFilesystem(QueryFilesystemRequestView request,
                                        QueryFilesystemCompleter::Sync& completer) {
  ZX_ASSERT(false);
}

}  // namespace fs_pty::internal