// 多端解耦 + 控制权强制回归验证（连真实 Rust 服务端）。
import 'dart:convert';

import 'package:flutter_test/flutter_test.dart';
import 'package:web_socket_channel/io.dart';

import 'support.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  test('多端解耦 + 控制权强制 + 会话清理', () async {
    if (!await isServerUp('127.0.0.1', 8080)) {
      markTestSkipped('Rtty server not running');
      return;
    }
    final base = 'ws://127.0.0.1:8080/ws';

    // 1. 桌面端（client=desktop）：收 raw 二进制，不收 snapshot。
    final desktop = IOWebSocketChannel.connect(Uri.parse('$base?client=desktop'));
    final dOut = <String>[];
    desktop.stream.listen((m) {
      if (m is List<int>) {
        dOut.add('binary:${utf8.decode(m, allowMalformed: true)}');
      } else if (m is String) {
        dOut.add('text:${m.length > 100 ? m.substring(0, 100) : m}');
      } else {
        dOut.add('$m');
      }
    });
    await Future<void>.delayed(const Duration(milliseconds: 700));
    final dHasBinary = dOut.any((e) => e.startsWith('binary:'));
    final dHasSnapshot = dOut.any((e) => e.contains('mobile_snapshot'));
    expect(dHasBinary, isTrue, reason: '桌面端应收到原始 ANSI 二进制 $dOut');
    expect(dHasSnapshot, isFalse, reason: '桌面端不应收到语义快照 $dOut');

    // 2. 移动端（client=mobile）：收 snapshot，不收 binary。
    final mobile = IOWebSocketChannel.connect(Uri.parse('$base?client=mobile'));
    final mOut = <String>[];
    mobile.stream.listen((m) {
      if (m is List<int>) {
        mOut.add('binary:${utf8.decode(m, allowMalformed: true)}');
      } else if (m is String) {
        mOut.add('text:${m.length > 100 ? m.substring(0, 100) : m}');
      } else {
        mOut.add('$m');
      }
    });
    await Future<void>.delayed(const Duration(milliseconds: 700));
    final mHasSnapshot = mOut.any((e) => e.contains('mobile_snapshot'));
    final mHasBinary = mOut.any((e) => e.startsWith('binary:'));
    expect(mHasSnapshot, isTrue, reason: '移动端应收到语义快照 $mOut');
    expect(mHasBinary, isFalse, reason: '移动端不应收到二进制 $mOut');

    // 3. 桌面端发命令，确认 raw 输出回显。
    desktop.sink.add(jsonEncode({'type': 'input', 'data': 'echo D_E2E\r\n'}));
    await Future<void>.delayed(const Duration(milliseconds: 900));
    expect(dOut.join('\n').contains('D_E2E'), isTrue, reason: '桌面端命令回显');

    // 4. 控制权强制：桌面端 claim 后，移动端输入被拒。
    desktop.sink.add(jsonEncode({'type': 'claim_control'}));
    await Future<void>.delayed(const Duration(milliseconds: 400));
    mobile.sink
        .add(jsonEncode({'type': 'input', 'data': 'echo BLOCKED_SHOULD_NOT_SHOW\r\n'}));
    await Future<void>.delayed(const Duration(milliseconds: 900));
    final both = (dOut.join('\n') + mOut.join('\n'));
    expect(both.contains('BLOCKED_SHOULD_NOT_SHOW'), isFalse,
        reason: '非控制者输入应被阻止');

    // 5. 会话清理：exit 触发会话移除。
    desktop.sink.add(jsonEncode({'type': 'input', 'data': 'exit\r\n'}));
    await Future<void>.delayed(const Duration(milliseconds: 1300));

    desktop.sink.close();
    mobile.sink.close();
  });
}