import { isMac } from '@/helpers/system';
import { spawn, SpawnOptions } from 'child_process';
import { pathExists } from 'fs-extra';
import { ExternalEditorError, FoundEditor } from './shared';

/**
 * Open a given file or folder in the desired external editor.
 *
 * @param fullPath A folder or file path to pass as an argument when launching the editor.
 * @param editor The external editor to launch.
 */
export async function launchExternalEditor(fullPath: string, editor: FoundEditor): Promise<void> {
  const editorPath = editor.path;
  const exists = await pathExists(editorPath);
  if (!exists) {
    const label = isMac ? 'Preferences' : 'Options';
    throw new ExternalEditorError(
      `Could not find executable for '${editor.editor}' at path '${editor.path}'.  Please open ${label} and select an available editor.`,
      { openPreferences: true },
    );
  }

  const options: SpawnOptions = {
    // Make sure the editor processes are detached from the Desktop app.
    // Otherwise, some editors (like Notepad++) will be killed when the
    // Desktop app is closed.
    detached: true,
  };

  if (editor.usesShell === true) {
    spawn(`"${editorPath}"`, [`"${fullPath}"`], { ...options, shell: true });
  } else if (isMac) {
    // In macOS we can use `open`, which will open the right executable file
    // for us, we only need the path to the editor .app folder.
    spawn('open', ['-a', editorPath, fullPath], options);
  } else {
    spawn(editorPath, [fullPath], options);
  }
}