import 'dart:convert';
import 'dart:io';

import 'package:flutter/material.dart';

import '../data/words_data.dart';
import '../g4f/g4f.dart';
import '../models/history_entry_model.dart';
import '../models/word_model.dart';
import '../services/ai_oracle_service.dart';

class ProviderProbeRow {
  ProviderProbeRow({
    required this.provider,
    this.running = false,
    this.ok,
    this.text = '',
    this.error,
    this.elapsedMs = 0,
  });

  final BaseProvider provider;
  bool running;
  bool? ok;
  String text;
  String? error;
  int elapsedMs;

  String get name => provider.name;
  bool get isWebView => provider.isWebView;
}

/// On-device comparison: the real Oracle prompt, every G4F provider, Android process.
class ProviderBakeoffScreen extends StatefulWidget {
  const ProviderBakeoffScreen({super.key, this.autoStart = true});

  final bool autoStart;

  @override
  State<ProviderBakeoffScreen> createState() => _ProviderBakeoffScreenState();
}

class _ProviderBakeoffScreenState extends State<ProviderBakeoffScreen> {
  static const _question = 'Что скрыто в моём нынешнем выборе?';

  late final List<SessionWord> _words;
  late final List<Message> _messages;
  late final List<ProviderProbeRow> _rows;
  bool _running = false;
  bool _done = false;

  @override
  void initState() {
    super.initState();
    _words = _pickWords();
    _messages = AiOracleService().buildInterpretationMessages(
      words: _words,
      question: _question,
    );
    _rows = [
      for (final p in G4FClient().chat.completions.providers)
        if (p.working) ProviderProbeRow(provider: p),
    ];
    if (widget.autoStart) {
      WidgetsBinding.instance.addPostFrameCallback((_) => _run());
    }
  }

  List<SessionWord> _pickWords() {
    WordItem byName(String name) => kRussianTop1000Words.firstWhere(
          (w) => w.word == name,
        );
    final items = [
      byName('огонь').copyWith(sessionNumber: 17),
      byName('зеркало').copyWith(sessionNumber: 92),
      byName('порог').copyWith(sessionNumber: 112),
    ];
    return [
      for (final item in items) SessionWord.fromWordItem(item),
    ];
  }

  Future<void> _run() async {
    if (_running) return;
    setState(() {
      _running = true;
      _done = false;
      for (final row in _rows) {
        row.running = false;
        row.ok = null;
        row.text = '';
        row.error = null;
        row.elapsedMs = 0;
      }
    });

    _log('BEGIN question=$_question words=${_words.map((w) => w.word).join(",")}');

    for (final row in _rows) {
      if (!mounted) return;
      setState(() => row.running = true);
      _log('START ${row.name} webview=${row.isWebView}');
      final sw = Stopwatch()..start();
      try {
        final model = row.provider.models.contains(G4FModels.gpt4o)
            ? G4FModels.gpt4o
            : row.provider.defaultModel;
        final text = await row.provider.complete(model, _messages);
        sw.stop();
        final ok = looksLikeModelOutput(text) && text.trim().length >= 2;
        row
          ..ok = ok
          ..text = text.trim()
          ..error = ok ? null : 'unusable'
          ..elapsedMs = sw.elapsedMilliseconds
          ..running = false;
        _log(
          'DONE ${row.name} ok=$ok ms=${row.elapsedMs} chars=${row.text.length}',
        );
        _log('TEXT ${row.name} ${jsonEncode(row.text)}');
      } catch (e) {
        sw.stop();
        row
          ..ok = false
          ..error = e.toString()
          ..elapsedMs = sw.elapsedMilliseconds
          ..running = false;
        _log('FAIL ${row.name} ms=${row.elapsedMs} $e');
      }
      if (mounted) setState(() {});
    }

    await _writeReport();
    _log('END ok=${_rows.where((r) => r.ok == true).length}/${_rows.length}');
    if (mounted) {
      setState(() {
        _running = false;
        _done = true;
      });
    }
  }

  Future<void> _writeReport() async {
    final report = {
      'platform': Platform.operatingSystem,
      'question': _question,
      'words': [
        for (final w in _words)
          {
            'word': w.word,
            'sessionNumber': w.sessionNumber,
            'category': w.category,
            'symbolicMeaning': w.symbolicMeaning,
          }
      ],
      'results': [
        for (final r in _rows)
          {
            'name': r.name,
            'webview': r.isWebView,
            'ok': r.ok,
            'ms': r.elapsedMs,
            'error': r.error,
            'text': r.text,
          }
      ],
    };
    final encoded = const JsonEncoder.withIndent('  ').convert(report);
    _log('REPORT $encoded');
    try {
      final file = File('/data/data/com.example.words999.words999/cache/oracle_bakeoff.json');
      await file.parent.create(recursive: true);
      await file.writeAsString(encoded);
      _log('WROTE ${file.path}');
    } catch (e) {
      _log('WRITE_FAIL $e');
    }
  }

  void _log(String line) {
    debugPrint('ORACLE_BAKEOFF|$line');
  }

  @override
  Widget build(BuildContext context) {
    final okCount = _rows.where((r) => r.ok == true).length;
    return Scaffold(
      backgroundColor: const Color(0xFF0C0E1A),
      appBar: AppBar(
        title: const Text('Сравнение провайдеров'),
        actions: [
          if (!_running)
            IconButton(
              onPressed: _run,
              icon: const Icon(Icons.refresh),
              tooltip: 'Запустить снова',
            ),
        ],
      ),
      body: ListView(
        padding: const EdgeInsets.fromLTRB(16, 12, 16, 32),
        children: [
          _headerCard(okCount),
          const SizedBox(height: 12),
          for (final row in _rows) ...[
            _resultCard(row),
            const SizedBox(height: 10),
          ],
        ],
      ),
    );
  }

  Widget _headerCard(int okCount) {
    return Container(
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: const Color(0xFF151829),
        borderRadius: BorderRadius.circular(16),
        border: Border.all(color: const Color(0xFFFFD54F).withValues(alpha: 0.25)),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            _running
                ? 'Идёт опрос на Android…'
                : _done
                    ? 'Готово: $okCount из ${_rows.length} ответили'
                    : 'Ожидание запуска',
            style: const TextStyle(
              color: Color(0xFFFFD54F),
              fontSize: 16,
              fontWeight: FontWeight.w700,
            ),
          ),
          const SizedBox(height: 8),
          Text(
            'Вопрос: «$_question»',
            style: const TextStyle(color: Color(0xFFE8EAF6), height: 1.35),
          ),
          const SizedBox(height: 8),
          Text(
            'Знаки: ${_words.map((w) => '«${w.word.toUpperCase()}» (#${w.formattedSessionNumber})').join(' → ')}',
            style: const TextStyle(color: Color(0xFF80DEEA), height: 1.35),
          ),
          const SizedBox(height: 6),
          const Text(
            'Тот же system-промпт и user-промпт, что у interpretSession. Каждый провайдер вызывается отдельно, без запасного переключения.',
            style: TextStyle(color: Color(0xFF8C93B8), fontSize: 12, height: 1.35),
          ),
          if (_running)
            const Padding(
              padding: EdgeInsets.only(top: 12),
              child: LinearProgressIndicator(color: Color(0xFFFFD54F)),
            ),
        ],
      ),
    );
  }

  Widget _resultCard(ProviderProbeRow row) {
    final Color accent;
    if (row.running) {
      accent = const Color(0xFF80DEEA);
    } else if (row.ok == true) {
      accent = const Color(0xFF81C784);
    } else if (row.ok == false) {
      accent = const Color(0xFFE57373);
    } else {
      accent = const Color(0xFF5C638A);
    }
    return Container(
      padding: const EdgeInsets.all(14),
      decoration: BoxDecoration(
        color: const Color(0xFF151829),
        borderRadius: BorderRadius.circular(14),
        border: Border.all(color: accent.withValues(alpha: 0.45)),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Icon(
                row.running
                    ? Icons.hourglass_top
                    : row.ok == true
                        ? Icons.check_circle
                        : row.ok == false
                            ? Icons.cancel
                            : Icons.circle_outlined,
                color: accent,
                size: 18,
              ),
              const SizedBox(width: 8),
              Expanded(
                child: Text(
                  row.name,
                  style: const TextStyle(
                    color: Color(0xFFFFF9C4),
                    fontWeight: FontWeight.w700,
                  ),
                ),
              ),
              Text(
                row.isWebView ? 'WebView' : 'REST',
                style: const TextStyle(color: Color(0xFF8C93B8), fontSize: 11),
              ),
              if (row.elapsedMs > 0) ...[
                const SizedBox(width: 8),
                Text(
                  '${(row.elapsedMs / 1000).toStringAsFixed(1)}с',
                  style: const TextStyle(color: Color(0xFF8C93B8), fontSize: 11),
                ),
              ],
            ],
          ),
          const SizedBox(height: 8),
          if (row.running)
            const Text('Ждём полный ответ…', style: TextStyle(color: Color(0xFF80DEEA)))
          else if (row.ok == true)
            SelectableText(
              row.text,
              style: const TextStyle(color: Color(0xFFE8EAF6), height: 1.4, fontSize: 14),
            )
          else if (row.ok == false)
            Text(
              row.error ?? 'ошибка',
              style: const TextStyle(color: Color(0xFFE57373), fontSize: 12, height: 1.35),
            )
          else
            const Text('в очереди', style: TextStyle(color: Color(0xFF5C638A), fontSize: 12)),
        ],
      ),
    );
  }
}