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flutter_monisuo/lib/providers/kline_provider.dart

@@ -1,183 +0,0 @@
-import 'dart:async';
-import 'package:flutter/material.dart';
-import '../data/models/kline_candle.dart';
-import '../data/services/kline_service.dart';
-import '../data/services/kline_websocket_service.dart';
-
-/// K线状态管理
-class KlineProvider extends ChangeNotifier {
-  final KlineService _klineService;
-  final KlineWebSocketService _wsService;
-
-  KlineProvider(this._klineService, this._wsService);
-
-  List<KlineCandle> _candles = [];
-  KlineCandle? _currentCandle;
-  String _interval = '1h';
-  String _coinCode = '';
-  bool _isLoading = false;
-  bool _isLoadingMore = false;
-  bool _isConnected = false;
-  String? _error;
-
-  StreamSubscription<KlineCandle>? _wsSubscription;
-  Timer? _pollingTimer;
-
-  // Getters
-  List<KlineCandle> get candles => _candles;
-  KlineCandle? get currentCandle => _currentCandle;
-  String get interval => _interval;
-  String get coinCode => _coinCode;
-  bool get isLoading => _isLoading;
-  bool get isLoadingMore => _isLoadingMore;
-  bool get isConnected => _isConnected;
-  String? get error => _error;
-
-  /// 加载某个币种的K线数据
-  Future<void> loadCoin(String coinCode, {String? interval}) async {
-    _coinCode = coinCode;
-    if (interval != null) _interval = interval;
-    _candles = [];
-    _currentCandle = null;
-    _error = null;
-    _isLoading = true;
-    notifyListeners();
-
-    try {
-      // 1. 获取历史K线
-      final response = await _klineService.fetchHistory(
-        coinCode: _coinCode,
-        interval: _interval,
-        limit: 200,
-      );
-      if (response.success && response.data != null) {
-        _candles = response.data!;
-      }
-
-      // 2. 获取当前K线
-      final currentResponse = await _klineService.fetchCurrentCandle(
-        coinCode: _coinCode,
-        interval: _interval,
-      );
-      if (currentResponse.success && currentResponse.data != null) {
-        _currentCandle = currentResponse.data;
-      }
-
-      // 3. 连接 WebSocket
-      _connectWebSocket();
-
-      _isLoading = false;
-      notifyListeners();
-    } catch (e) {
-      _error = '加载K线数据失败: $e';
-      _isLoading = false;
-      notifyListeners();
-    }
-  }
-
-  /// 切换周期
-  Future<void> changeInterval(String newInterval) async {
-    if (newInterval == _interval) return;
-
-    _interval = newInterval;
-    _candles = [];
-    _currentCandle = null;
-
-    // 重新加载
-    await loadCoin(_coinCode, interval: newInterval);
-  }
-
-  /// 加载更多历史数据（分页）
-  Future<void> loadMore() async {
-    if (_isLoadingMore || _candles.isEmpty) return;
-    _isLoadingMore = true;
-    notifyListeners();
-
-    try {
-      final oldestTime = _candles.first.closeTime;
-      final response = await _klineService.fetchHistory(
-        coinCode: _coinCode,
-        interval: _interval,
-        limit: 200,
-        before: oldestTime,
-      );
-      if (response.success && response.data != null) {
-        _candles = [...response.data!, ..._candles];
-      }
-    } catch (_) {}
-
-    _isLoadingMore = false;
-    notifyListeners();
-  }
-
-  void _connectWebSocket() {
-    // 取消之前的订阅
-    _wsSubscription?.cancel();
-    _wsService.unsubscribe(_coinCode);
-
-    // 订阅新币种
-    _wsService.connect();
-    _wsSubscription = _wsService.subscribe(_coinCode).listen(
-      _onTick,
-      onError: (_) => _startPolling(),
-      onDone: () => _startPolling(),
-    );
-
-    _isConnected = _wsService.isConnected;
-    notifyListeners();
-  }
-
-  void _onTick(KlineCandle tick) {
-    if (tick.interval != _interval) return;
-
-    _isConnected = true;
-
-    if (tick.isClosed) {
-      // 收盘 tick → 添加到历史列表
-      _candles.add(tick);
-      _currentCandle = null;
-
-      // 停止轮询（如果之前在轮询）
-      _pollingTimer?.cancel();
-      _pollingTimer = null;
-    } else {
-      // 进行中的 tick → 更新当前K线
-      _currentCandle = tick;
-    }
-
-    notifyListeners();
-  }
-
-  /// WebSocket 断连时降级为 HTTP 轮询
-  void _startPolling() {
-    _isConnected = false;
-    notifyListeners();
-
-    _pollingTimer?.cancel();
-    _pollingTimer = Timer.periodic(
-      const Duration(seconds: 5),
-      (_) => _pollCurrentCandle(),
-    );
-  }
-
-  Future<void> _pollCurrentCandle() async {
-    try {
-      final response = await _klineService.fetchCurrentCandle(
-        coinCode: _coinCode,
-        interval: _interval,
-      );
-      if (response.success && response.data != null) {
-        _currentCandle = response.data;
-        notifyListeners();
-      }
-    } catch (_) {}
-  }
-
-  @override
-  void dispose() {
-    _wsSubscription?.cancel();
-    _wsService.unsubscribe(_coinCode);
-    _pollingTimer?.cancel();
-    super.dispose();
-  }
-}