import 'dart:io';

import 'package:flutter/foundation.dart';

import '../../src/pty/env.dart';

class ToolCheck extends ChangeNotifier {
  bool pqlOk = false;
  bool tmuxOk = false;
  bool gitOk = false;
  bool checked = false;

  bool get allOk => pqlOk && tmuxOk && gitOk;

  List<String> get errors => [if (!pqlOk) 'pql not found', if (!tmuxOk) 'tmux not found', if (!gitOk) 'git not found'];

  /// Workspace root, set by the app at boot. Falls back to cwd.
  static String? workspaceRoot;

  Future<void> check() async {
    pqlOk = _existsOnPath('pql');
    // tmux has no Windows build; absence there is the documented
    // no-tmux mode, not a failed check.
    tmuxOk = Platform.isWindows || _existsOnPath('tmux');
    gitOk = _existsOnPath('git');
    checked = true;
    notifyListeners();
  }

  /// Check if [name] exists as an executable in any PATH directory.
  /// Uses direct file-existence checks — works inside a macOS sandbox
  /// without needing to exec `which`.
  static bool _existsOnPath(String name) {
    final sep = Platform.isWindows ? ';' : ':';
    for (final dir in expandedPath.split(sep)) {
      if (dir.isEmpty) continue;
      if (Platform.isWindows) {
        for (final ext in const ['.exe', '.bat', '.cmd', '.com', '']) {
          if (File('$dir\\$name$ext').existsSync()) return true;
        }
      } else {
        if (File('$dir/$name').existsSync()) return true;
      }
    }
    return false;
  }
}