//===-- RemoteAwarePlatform.cpp ---------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "lldb/Target/RemoteAwarePlatform.h"
#include "lldb/Host/FileCache.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/Host.h"

using namespace lldb_private;

bool RemoteAwarePlatform::GetModuleSpec(const FileSpec &module_file_spec,
                                        const ArchSpec &arch,
                                        ModuleSpec &module_spec) {
  if (m_remote_platform_sp)
    return m_remote_platform_sp->GetModuleSpec(module_file_spec, arch,
                                               module_spec);

  return Platform::GetModuleSpec(module_file_spec, arch, module_spec);
}

Status RemoteAwarePlatform::RunShellCommand(
    const char *command, const FileSpec &working_dir, int *status_ptr,
    int *signo_ptr, std::string *command_output,
    const Timeout<std::micro> &timeout) {
  if (IsHost())
    return Host::RunShellCommand(command, working_dir, status_ptr, signo_ptr,
                                 command_output, timeout);
  if (m_remote_platform_sp)
    return m_remote_platform_sp->RunShellCommand(
        command, working_dir, status_ptr, signo_ptr, command_output, timeout);
  return Status("unable to run a remote command without a platform");
}

Status RemoteAwarePlatform::MakeDirectory(const FileSpec &file_spec,
                                          uint32_t file_permissions) {
  if (m_remote_platform_sp)
    return m_remote_platform_sp->MakeDirectory(file_spec, file_permissions);
  return Platform::MakeDirectory(file_spec, file_permissions);
}

Status RemoteAwarePlatform::GetFilePermissions(const FileSpec &file_spec,
                                               uint32_t &file_permissions) {
  if (m_remote_platform_sp)
    return m_remote_platform_sp->GetFilePermissions(file_spec,
                                                    file_permissions);
  return Platform::GetFilePermissions(file_spec, file_permissions);
}

Status RemoteAwarePlatform::SetFilePermissions(const FileSpec &file_spec,
                                               uint32_t file_permissions) {
  if (m_remote_platform_sp)
    return m_remote_platform_sp->SetFilePermissions(file_spec,
                                                    file_permissions);
  return Platform::SetFilePermissions(file_spec, file_permissions);
}

lldb::user_id_t RemoteAwarePlatform::OpenFile(const FileSpec &file_spec,
                                              uint32_t flags, uint32_t mode,
                                              Status &error) {
  if (IsHost())
    return FileCache::GetInstance().OpenFile(file_spec, flags, mode, error);
  if (m_remote_platform_sp)
    return m_remote_platform_sp->OpenFile(file_spec, flags, mode, error);
  return Platform::OpenFile(file_spec, flags, mode, error);
}

bool RemoteAwarePlatform::CloseFile(lldb::user_id_t fd, Status &error) {
  if (IsHost())
    return FileCache::GetInstance().CloseFile(fd, error);
  if (m_remote_platform_sp)
    return m_remote_platform_sp->CloseFile(fd, error);
  return Platform::CloseFile(fd, error);
}

uint64_t RemoteAwarePlatform::ReadFile(lldb::user_id_t fd, uint64_t offset,
                                       void *dst, uint64_t dst_len,
                                       Status &error) {
  if (IsHost())
    return FileCache::GetInstance().ReadFile(fd, offset, dst, dst_len, error);
  if (m_remote_platform_sp)
    return m_remote_platform_sp->ReadFile(fd, offset, dst, dst_len, error);
  return Platform::ReadFile(fd, offset, dst, dst_len, error);
}

uint64_t RemoteAwarePlatform::WriteFile(lldb::user_id_t fd, uint64_t offset,
                                        const void *src, uint64_t src_len,
                                        Status &error) {
  if (IsHost())
    return FileCache::GetInstance().WriteFile(fd, offset, src, src_len, error);
  if (m_remote_platform_sp)
    return m_remote_platform_sp->WriteFile(fd, offset, src, src_len, error);
  return Platform::WriteFile(fd, offset, src, src_len, error);
}

lldb::user_id_t RemoteAwarePlatform::GetFileSize(const FileSpec &file_spec) {
  if (IsHost()) {
    uint64_t Size;
    if (llvm::sys::fs::file_size(file_spec.GetPath(), Size))
      return 0;
    return Size;
  }
  if (m_remote_platform_sp)
    return m_remote_platform_sp->GetFileSize(file_spec);
  return Platform::GetFileSize(file_spec);
}

Status RemoteAwarePlatform::CreateSymlink(const FileSpec &src,
                                          const FileSpec &dst) {
  if (IsHost())
    return FileSystem::Instance().Symlink(src, dst);
  if (m_remote_platform_sp)
    return m_remote_platform_sp->CreateSymlink(src, dst);
  return Platform::CreateSymlink(src, dst);
}

bool RemoteAwarePlatform::GetFileExists(const FileSpec &file_spec) {
  if (IsHost())
    return FileSystem::Instance().Exists(file_spec);
  if (m_remote_platform_sp)
    return m_remote_platform_sp->GetFileExists(file_spec);
  return Platform::GetFileExists(file_spec);
}

Status RemoteAwarePlatform::Unlink(const FileSpec &file_spec) {
  if (IsHost())
    return llvm::sys::fs::remove(file_spec.GetPath());
  if (m_remote_platform_sp)
    return m_remote_platform_sp->Unlink(file_spec);
  return Platform::Unlink(file_spec);
}

bool RemoteAwarePlatform::CalculateMD5(const FileSpec &file_spec, uint64_t &low,
                                       uint64_t &high) {
  if (IsHost())
    return Platform::CalculateMD5(file_spec, low, high);
  if (m_remote_platform_sp)
    return m_remote_platform_sp->CalculateMD5(file_spec, low, high);
  return false;
}

FileSpec RemoteAwarePlatform::GetRemoteWorkingDirectory() {
  if (IsRemote() && m_remote_platform_sp)
    return m_remote_platform_sp->GetRemoteWorkingDirectory();
  return Platform::GetRemoteWorkingDirectory();
}

bool RemoteAwarePlatform::SetRemoteWorkingDirectory(
    const FileSpec &working_dir) {
  if (IsRemote() && m_remote_platform_sp)
    return m_remote_platform_sp->SetRemoteWorkingDirectory(working_dir);
  return Platform::SetRemoteWorkingDirectory(working_dir);
}

Status RemoteAwarePlatform::GetFileWithUUID(const FileSpec &platform_file,
                                            const UUID *uuid_ptr,
                                            FileSpec &local_file) {
  if (IsRemote() && m_remote_platform_sp)
    return m_remote_platform_sp->GetFileWithUUID(platform_file, uuid_ptr,
                                                 local_file);

  // Default to the local case
  local_file = platform_file;
  return Status();
}

bool RemoteAwarePlatform::GetRemoteOSVersion() {
  if (m_remote_platform_sp) {
    m_os_version = m_remote_platform_sp->GetOSVersion();
    return !m_os_version.empty();
  }
  return false;
}

bool RemoteAwarePlatform::GetRemoteOSBuildString(std::string &s) {
  if (m_remote_platform_sp)
    return m_remote_platform_sp->GetRemoteOSBuildString(s);
  s.clear();
  return false;
}

bool RemoteAwarePlatform::GetRemoteOSKernelDescription(std::string &s) {
  if (m_remote_platform_sp)
    return m_remote_platform_sp->GetRemoteOSKernelDescription(s);
  s.clear();
  return false;
}

ArchSpec RemoteAwarePlatform::GetRemoteSystemArchitecture() {
  if (m_remote_platform_sp)
    return m_remote_platform_sp->GetRemoteSystemArchitecture();
  return ArchSpec();
}

const char *RemoteAwarePlatform::GetHostname() {
  if (IsHost())
    return Platform::GetHostname();
  if (m_remote_platform_sp)
    return m_remote_platform_sp->GetHostname();
  return nullptr;
}

const char *RemoteAwarePlatform::GetUserName(uint32_t uid) {
  // Check the cache in Platform in case we have already looked this uid up
  const char *user_name = Platform::GetUserName(uid);
  if (user_name)
    return user_name;

  if (IsRemote() && m_remote_platform_sp)
    return m_remote_platform_sp->GetUserName(uid);
  return nullptr;
}

const char *RemoteAwarePlatform::GetGroupName(uint32_t gid) {
  const char *group_name = Platform::GetGroupName(gid);
  if (group_name)
    return group_name;

  if (IsRemote() && m_remote_platform_sp)
    return m_remote_platform_sp->GetGroupName(gid);
  return nullptr;
}

Environment RemoteAwarePlatform::GetEnvironment() {
  if (IsRemote()) {
    if (m_remote_platform_sp)
      return m_remote_platform_sp->GetEnvironment();
    return Environment();
  }
  return Host::GetEnvironment();
}

bool RemoteAwarePlatform::IsConnected() const {
  if (IsHost())
    return true;
  else if (m_remote_platform_sp)
    return m_remote_platform_sp->IsConnected();
  return false;
}

bool RemoteAwarePlatform::GetProcessInfo(lldb::pid_t pid,
                                         ProcessInstanceInfo &process_info) {
  if (IsHost())
    return Platform::GetProcessInfo(pid, process_info);
  if (m_remote_platform_sp)
    return m_remote_platform_sp->GetProcessInfo(pid, process_info);
  return false;
}

uint32_t
RemoteAwarePlatform::FindProcesses(const ProcessInstanceInfoMatch &match_info,
                                   ProcessInstanceInfoList &process_infos) {
  if (IsHost())
    return Platform::FindProcesses(match_info, process_infos);
  if (m_remote_platform_sp)
    return m_remote_platform_sp->FindProcesses(match_info, process_infos);
  return 0;
}

lldb::ProcessSP RemoteAwarePlatform::ConnectProcess(llvm::StringRef connect_url,
                                                    llvm::StringRef plugin_name,
                                                    Debugger &debugger,
                                                    Target *target,
                                                    Status &error) {
  if (m_remote_platform_sp)
    return m_remote_platform_sp->ConnectProcess(connect_url, plugin_name,
                                                debugger, target, error);
  return Platform::ConnectProcess(connect_url, plugin_name, debugger, target,
                                  error);
}

Status RemoteAwarePlatform::LaunchProcess(ProcessLaunchInfo &launch_info) {
  Status error;

  if (IsHost()) {
    error = Platform::LaunchProcess(launch_info);
  } else {
    if (m_remote_platform_sp)
      error = m_remote_platform_sp->LaunchProcess(launch_info);
    else
      error.SetErrorString("the platform is not currently connected");
  }
  return error;
}

Status RemoteAwarePlatform::KillProcess(const lldb::pid_t pid) {
  if (IsHost())
    return Platform::KillProcess(pid);
  if (m_remote_platform_sp)
    return m_remote_platform_sp->KillProcess(pid);
  return Status("the platform is not currently connected");
}