import 'dart:io';

import '../command.dart';

const _nativeCsiuTerminals = <String>[
  'ghostty', 'kitty', 'iTerm.app', 'WezTerm', 'WarpTerminal',
];

Future<CommandResult> run(CommandContext context, List<String> args) async {
  final term = Platform.environment['TERM_PROGRAM']
      ?? Platform.environment['TERMINAL_EMULATOR']
      ?? '';

  if (_nativeCsiuTerminals.contains(term)) {
    context.writeLine(
      'Terminal-setup: your terminal ($term) natively supports the Kitty keyboard protocol.',
    );
    context.writeLine('No additional setup is needed for Shift+Enter / newlines.');
    return const CommandResult();
  }

  context.writeLine('Terminal setup');
  context.writeLine('');

  if (Platform.isMacOS && term == 'Apple_Terminal') {
    context.writeLine('Detected: Apple Terminal (macOS)');
    context.writeLine('');
    context.writeLine(
      'To enable Option+Enter for newlines:\n'
      '  1. Open Terminal > Settings > Profiles > Keyboard\n'
      '  2. Add a key binding: Option+Return → sends \\033\\012\n'
      '  3. Alternatively run the legacy CLI interactively: /terminal-setup',
    );
  } else if (term == 'vscode' || term == 'cursor' || term == 'windsurf') {
    context.writeLine('Detected: $term terminal');
    context.writeLine('');
    context.writeLine(
      'To enable Shift+Enter for newlines, add this to your $term keybindings.json:\n'
      '  { "key": "shift+enter", "command": "workbench.action.terminal.sendSequence",\n'
      '    "args": { "text": "\\\\n" }, "when": "terminalFocus" }',
    );
  } else {
    context.writeLine('Detected terminal: ${term.isEmpty ? '(unknown)' : term}');
    context.writeLine('');
    context.writeLine(
      'Interactive terminal setup (key binding installation) is not ported to the Dart runtime.',
    );
    context.writeLine('Run the legacy CLI to use the full interactive setup wizard.');
  }

  return const CommandResult();
}