// 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 "src/developer/cmd/tasks/cd_task.h"

#include <errno.h>
#include <string.h>
#include <unistd.h>

namespace cmd {

CdTask::CdTask(async_dispatcher_t* dispatcher) : Task(dispatcher) {}

CdTask::~CdTask() = default;

zx_status_t CdTask::Execute(Command command, Task::CompletionCallback callback) {
  if (command.args().size() == 2) {
    const std::string& name = command.args()[1];
    std::string path;
    if (name[0] == '/') {
      path = name;
    } else {
      char cwd[PATH_MAX];
      getcwd(cwd, sizeof(cwd));
      path = std::string(cwd) + "/" + name;
    }
    if (chdir(path.c_str()) < 0) {
      fprintf(stderr, "cd: Failed to change directories: %s\n", strerror(errno));
      return ZX_ERR_NEXT;
    }
    char cwd[PATH_MAX];
    getcwd(cwd, sizeof(cwd));
    setenv("PWD", cwd, 1);
  } else {
    fprintf(stderr, "cd: Invalid number of arguments. Expected 1, got %zu.\n",
            command.args().size() - 1);
  }
  return ZX_ERR_NEXT;
}

}  // namespace cmd