// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.

use deno_core::op2;
use deno_core::OpState;
use deno_permissions::PermissionsContainer;

#[cfg(unix)]
fn kill(pid: i32, sig: i32) -> i32 {
  // SAFETY: FFI call to libc
  if unsafe { libc::kill(pid, sig) } < 0 {
    std::io::Error::last_os_error().raw_os_error().unwrap()
  } else {
    0
  }
}

#[cfg(not(unix))]
fn kill(pid: i32, _sig: i32) -> i32 {
  use winapi::shared::minwindef::DWORD;
  use winapi::shared::minwindef::FALSE;
  use winapi::shared::minwindef::TRUE;
  use winapi::um::errhandlingapi::GetLastError;
  use winapi::um::processthreadsapi::GetCurrentProcess;
  use winapi::um::processthreadsapi::OpenProcess;
  use winapi::um::processthreadsapi::TerminateProcess;
  use winapi::um::winnt::PROCESS_TERMINATE;

  // SAFETY: FFI call to winapi
  unsafe {
    let p_hnd = if pid == 0 {
      GetCurrentProcess()
    } else {
      OpenProcess(PROCESS_TERMINATE, FALSE, pid as DWORD)
    };

    if p_hnd.is_null() {
      return GetLastError() as i32;
    }

    if TerminateProcess(p_hnd, 1) == TRUE {
      return 0;
    }

    GetLastError() as i32
  }
}

#[op2(fast)]
pub fn op_node_process_kill(
  state: &mut OpState,
  #[smi] pid: i32,
  #[smi] sig: i32,
) -> Result<i32, deno_core::error::AnyError> {
  state
    .borrow_mut::<PermissionsContainer>()
    .check_run_all("process.kill")?;
  Ok(kill(pid, sig))
}

#[op2(fast)]
pub fn op_process_abort() {
  std::process::abort();
}