import 'package:flutter_test/flutter_test.dart';
import 'package:words999/g4f/http_util.dart';
import 'package:words999/g4f/sse.dart';

void main() {
  test('splitSseLines reassembles lines split across chunks', () async {
    final lines = await splitSseLines(Stream.fromIterable([
      'data: {"message":"Hel',
      'lo"}\n',
      'data: {"message":"!"}\n',
      'data: [DONE]\n',
    ])).toList();
    expect(lines, [
      'data: {"message":"Hello"}',
      'data: {"message":"!"}',
      'data: [DONE]',
    ]);
  });

  test('extractSseContent reads OpenAI deltas and Duck messages', () {
    expect(
      extractSseContent('{"choices":[{"delta":{"content":"Привет"}}]}'),
      'Привет',
    );
    expect(
      extractSseContent('{"message":"знак","action":"success"}'),
      'знак',
    );
    expect(extractSseContent('[DONE]'), isNull);
  });

  test('extractOpenAiMessage reads a non-stream body', () {
    const body =
        '{"choices":[{"message":{"role":"assistant","content":"OK"}}]}';
    expect(extractOpenAiMessage(body), 'OK');
  });

  test('looksLikeGarbage detects WAF and error pages', () {
    expect(looksLikeGarbage('<!DOCTYPE html><html>'), isTrue);
    expect(looksLikeGarbage('Just a moment...'), isTrue);
    expect(looksLikeGarbage('Оракул видит знак ВЕТЕР'), isFalse);
    expect(looksLikeModelOutput('OK'), isFalse);
    expect(looksLikeModelOutput('{}'), isFalse);
    expect(looksLikeGarbage('No cake credits'), isTrue);
    expect(looksLikeModelOutput('Оракул видит знак ВЕТЕР'), isTrue);
  });
}