// ignore_for_file: invalid_use_of_protected_member, unnecessary_this

part of '../../boxing_page.dart';

extension _BoxingScanPart on _BoxingPageState {
  void _onScan(ScanResult result) {
    if (_isAutoProcessing) {
      return;
    }

    if (_crossPaichaPending) {
      _feedbackService.trigger(FeedbackEvent.alreadyCompleted);
      return;
    }

    final parsed = CodeParser.parse(result.barcode);

    if (parsed.type != CodeType.zongpaiNo) {
      _feedbackService.trigger(FeedbackEvent.scanInvalid);
      this._showStatusOverride(
        '无效码，请重新扫描',
        StatusDotColor.red,
        const Duration(seconds: 2),
      );
      return;
    }

    final zongpai = parsed.value;

    // 三种模式都允许后扫入的总排号覆盖当前扫码区；未确认数据不会入库。
    this._queryBoxInfo(zongpai);
  }

  Future<bool> _queryBoxInfo(String zongpai) async {
    final action = await _apiActions.fetchBoxInfo(zongpai);

    if (!mounted) return false;

    if (!action.success) {
      _feedbackService.trigger(switch (action.errorKind) {
        BoxingActionErrorKind.network => FeedbackEvent.networkError,
        BoxingActionErrorKind.missingApiUrl => FeedbackEvent.submitFailure,
        _ => FeedbackEvent.scanInvalid,
      });
      this._showStatusOverride(
        action.errorMessage ?? '查询失败',
        this._dotForActionError(action.errorKind),
        const Duration(seconds: 2),
      );
      return false;
    }

    final result = action.data!;
    // 判断该总牌号是否已全部装箱完毕
    final packedQuantity = result.currentZongpaiBoxes.fold<int>(
      0,
      (sum, item) => sum + item.quantity,
    );
    final totalQuantity = result.quantity ?? 0;
    final alreadyCompleted =
        totalQuantity > 0 && packedQuantity >= totalQuantity;

    _feedbackService.trigger(
      alreadyCompleted
          ? FeedbackEvent.alreadyCompleted
          : FeedbackEvent.scanValid,
    );

    setState(() {
      _zongpaiNo = zongpai;
      _paichanNo = result.paichanNo;
      _workOrderNo = result.workOrderNo;
      _erpQuantity = result.quantity;
      _currentZongpaiBoxes = result.currentZongpaiBoxes;
      _existingBoxes = result.existingBoxes;
      _maxBoxNo = result.maxBoxNo;
      _phase = BoxingPhase.scanned;
      _isDuplicateBoxNo = false;
      _editingBox = null;
      _editingAssignedItemId = null;
      _editingAssignedQuantity = '';
      _deletingAssignedItemId = null;
      _completedJumpBoxNo = null;
      _statusOverrideText = null;
      if (_mode == BoxingMode.singleCode) {
        _paichanSwitchNotice = null;
      }

      // 根据模式自动填充
      this._applyAutoFill();
    });
    return true;
  }

  Future<void> _processAutoScanCodes(List<String> codes) async {
    if (!mounted) return;
    setState(() {
      _isAutoProcessing = true;
      _autoWarnings.clear();
      _statusOverrideText = '正在同步转运数据...';
      _statusOverrideDot = StatusDotColor.orange;
    });

    if (_mode == BoxingMode.singleCode) {
      final code = codes.first;
      final ok = await this._queryBoxInfo(code);
      if (!ok && mounted) {
        setState(() => _autoWarnings.add('总排号 $code 未找到排产号信息，已忽略'));
      }
    } else {
      for (final code in codes) {
        if (!mounted) return;
        final queried = await this._queryBoxInfo(code);
        if (!queried) {
          if (mounted) {
            setState(() => _autoWarnings.add('总排号 $code 未找到排产号信息，已忽略'));
          }
          continue;
        }
        if (!_canSubmit) {
          if (mounted) {
            setState(() => _autoWarnings.add('总排号 $code 暂不能装箱，已忽略'));
          }
          continue;
        }
        final saved = await this._submit();
        if (!saved && mounted) {
          setState(() => _autoWarnings.add('总排号 $code 自动装箱失败，请手动处理'));
        }
      }
    }

    if (!mounted) return;
    setState(() {
      _isAutoProcessing = false;
      _statusOverrideText = null;
      _statusOverrideDot = null;
    });
    _focusQuantityInput();
    _requestFocus();
  }

  void _applyAutoFill() {
    switch (_mode) {
      case BoxingMode.singleCode:
        final remaining = _remainingQuantity;
        if (remaining <= 0) {
          _boxNoController.clear();
          _quantityController.clear();
          _statusOverrideText = '该总排号已全部装箱完毕';
          _statusOverrideDot = StatusDotColor.red;
          return;
        }
        _boxNoController.text = (_maxBoxNo + 1).toString();
        _quantityController.text = remaining.toString();
        _quantityController.selection = TextSelection(
          baseOffset: 0,
          extentOffset: _quantityController.text.length,
        );
        WidgetsBinding.instance.addPostFrameCallback((_) {
          if (mounted && _mode == BoxingMode.singleCode) {
            _quantityFocusNode.requestFocus();
          }
        });
      case BoxingMode.multiCode:
        final decision = decideMultiCodePaichanContext(
          lastPaichanNo: _lastScannedPaichanNo,
          currentPaichanNo: _paichanNo,
          currentBoxNoText: _boxNoController.text,
          maxBoxNo: _maxBoxNo,
        );
        if (decision.isSwitched) {
          _crossPaichaPending = true;
          _feedbackService.trigger(FeedbackEvent.alreadyCompleted);
          this._showCrossPaichaDialog();
          return;
        } else {
          _paichanSwitchNotice = null;
        }
        final boxNoToApply = decision.boxNoToApply;
        if (boxNoToApply != null) {
          _boxNoController.text = boxNoToApply.toString();
        }
        _lastScannedPaichanNo = _paichanNo;
        final remaining = _remainingQuantity;
        if (remaining <= 0) {
          _quantityController.clear();
          if (_manyToOnePackedItems.isEmpty &&
              _currentZongpaiBoxes.isNotEmpty) {
            _completedJumpBoxNo = _currentZongpaiBoxes.first.boxNo;
          }
          _statusOverrideText = '该总排号已全部装箱完毕';
          _statusOverrideDot = StatusDotColor.red;
          return;
        }
        _quantityController.text = remaining.toString();
        _quantityController.selection = TextSelection(
          baseOffset: 0,
          extentOffset: _quantityController.text.length,
        );
        WidgetsBinding.instance.addPostFrameCallback((_) {
          if (mounted && _mode == BoxingMode.multiCode) {
            _quantityFocusNode.requestFocus();
          }
        });
    }
    _isDuplicateBoxNo = _boxNoIsDuplicate();
  }

  Future<void> _showCrossPaichaDialog() async {
    final currentPaicha = _lastScannedPaichanNo ?? '--';
    final newPaicha = _paichanNo ?? '--';
    final confirmed = await showCrossPaichanDialog(
      context: context,
      currentPaicha: currentPaicha,
      newPaicha: newPaicha,
    );
    if (!mounted) return;
    confirmed ? this._confirmPaichanSwitch() : this._cancelPaichanSwitch();
  }

  void _confirmPaichanSwitch() {
    setState(() {
      _crossPaichaPending = false;
      _manyToOnePackedItems.clear();
      _editingPackedItemId = null;
      _editingPackedQuantity = '';
      _deletingPackedItemId = null;
      _paichanSwitchNotice = '排产号已切换：${_paichanNo ?? "--"}';
      _boxNoController.text = (_maxBoxNo + 1).toString();
      _lastScannedPaichanNo = _paichanNo;
    });
    _feedbackService.trigger(FeedbackEvent.paichanSwitch);

    // Continue with remaining quantity flow
    final remaining = _remainingQuantity;
    if (remaining <= 0) {
      _quantityController.clear();
      if (_manyToOnePackedItems.isEmpty && _currentZongpaiBoxes.isNotEmpty) {
        _completedJumpBoxNo = _currentZongpaiBoxes.first.boxNo;
      }
      setState(() {
        _statusOverrideText = '该总排号已全部装箱完毕';
        _statusOverrideDot = StatusDotColor.red;
      });
      return;
    }
    setState(() {
      _quantityController.text = remaining.toString();
      _quantityController.selection = TextSelection(
        baseOffset: 0,
        extentOffset: _quantityController.text.length,
      );
      _isDuplicateBoxNo = _boxNoIsDuplicate();
    });
    WidgetsBinding.instance.addPostFrameCallback((_) {
      if (mounted && _mode == BoxingMode.multiCode) {
        _quantityFocusNode.requestFocus();
      }
    });
  }

  void _cancelPaichanSwitch() {
    setState(() {
      _crossPaichaPending = false;
      _zongpaiNo = null;
      _paichanNo = _lastScannedPaichanNo;
      _phase = BoxingPhase.waiting;
    });
  }
}