// ignore_for_file: invalid_use_of_protected_member

part of '../../registration_page.dart';

extension _RegistrationDialogsPart on _RegistrationPageState {
  void _showLocationSwitchDialog(
    String newLocationCode,
    CodeType newLocationType,
  ) {
    final count = _zongpaiNos.length;
    showDialog(
      context: context,
      barrierDismissible: false,
      builder: (ctx) => AlertDialog(
        backgroundColor: Colors.orange.shade50,
        title: Row(
          children: [
            Icon(Icons.warning_amber, color: Colors.orange.shade800),
            const SizedBox(width: 8),
            Text('切换货架号', style: TextStyle(color: Colors.orange.shade900)),
          ],
        ),
        content: Text(
          '当前已有 $count 条待上架数据，切换货架号不会清除已扫描的总排号。',
          style: const TextStyle(fontSize: 14),
        ),
        actions: [
          TextButton(
            onPressed: () {
              Navigator.pop(ctx);
            },
            child: const Text('取消'),
          ),
          ElevatedButton(
            onPressed: () {
              Navigator.pop(ctx);
              _feedbackService.trigger(FeedbackEvent.scanValid);
              setState(() {
                _locationCode = newLocationCode;
                _locationType = newLocationType;
                _clearStatusOverride();
              });
            },
            style: ElevatedButton.styleFrom(
              backgroundColor: Colors.orange.shade700,
              foregroundColor: Colors.white,
            ),
            child: const Text('确认切换'),
          ),
        ],
      ),
    );
  }

  void _showDuplicateDialog(String zongpaiNo, Map<String, dynamic>? info) {
    showDialog(
      context: context,
      barrierDismissible: false,
      builder: (ctx) => AlertDialog(
        backgroundColor: Colors.red.shade50,
        title: const Row(
          children: [
            Icon(Icons.warning, color: Colors.red),
            SizedBox(width: 8),
            Text('重复上架', style: TextStyle(color: Colors.red)),
          ],
        ),
        content: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text('总排号：$zongpaiNo'),
            const SizedBox(height: 4),
            Text('已登记货位：${info?["location_code"] ?? "未知"}'),
            const SizedBox(height: 4),
            Text('登记时间：${info?["registered_at"] ?? "未知"}'),
            const SizedBox(height: 12),
            const Text(
              '请核查实物，确认是否操作错误。',
              style: TextStyle(fontWeight: FontWeight.bold),
            ),
          ],
        ),
        actions: [
          TextButton(
            onPressed: () {
              _feedbackService.stopAlert();
              Navigator.pop(ctx);
            },
            child: const Text('关闭'),
          ),
        ],
      ),
    );
  }

  void _showLocationConflictDialog({
    required List<PaichaOverviewItem> onShelfItems,
    required List<PaichaOverviewItem> transferredItems,
  }) {
    final contentParts = <Widget>[];

    if (onShelfItems.isNotEmpty) {
      contentParts.add(
        Text(
          '重复上架',
          style: TextStyle(
            fontWeight: FontWeight.bold,
            color: Colors.red.shade700,
          ),
        ),
      );
      for (final item in onShelfItems) {
        contentParts.addAll([
          Text('总排号：${item.zongpaiNo}'),
          Text('已登记货位：${item.locationCode ?? "未知"}'),
          const SizedBox(height: 6),
        ]);
      }
    }

    if (transferredItems.isNotEmpty) {
      if (onShelfItems.isNotEmpty) {
        contentParts.add(const Divider());
        contentParts.add(const SizedBox(height: 4));
      }
      contentParts.add(
        Text(
          '货物已转运',
          style: TextStyle(
            fontWeight: FontWeight.bold,
            color: Colors.orange.shade700,
          ),
        ),
      );
      for (final item in transferredItems) {
        contentParts.addAll([
          Text('总排号：${item.zongpaiNo}'),
          Text('转运货位：${item.locationCode ?? "未知"}'),
          const SizedBox(height: 6),
        ]);
      }
    }

    contentParts.add(const SizedBox(height: 4));
    contentParts.add(
      const Text(
        '请核查实物，确认是否操作错误。',
        style: TextStyle(fontWeight: FontWeight.bold),
      ),
    );

    showDialog(
      context: context,
      barrierDismissible: false,
      builder: (ctx) => AlertDialog(
        backgroundColor: Colors.red.shade50,
        title: const Row(
          children: [
            Icon(Icons.warning, color: Colors.red),
            SizedBox(width: 8),
            Text('操作冲突', style: TextStyle(color: Colors.red)),
          ],
        ),
        content: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: contentParts,
        ),
        actions: [
          TextButton(
            onPressed: () {
              _feedbackService.stopAlert();
              Navigator.pop(ctx);
            },
            child: const Text('关闭'),
          ),
        ],
      ),
    );
  }

  Future<void> _showCrossPaichaDialog(String newZongpaiNo) async {
    final currentPaicha = _overview?.paichaNo ?? '--';
    final shouldSwitch = await _confirmCrossPaichaSwitch(
      newZongpaiNo: newZongpaiNo,
      currentPaicha: currentPaicha,
    );
    if (!mounted) return;
    if (shouldSwitch) {
      _switchToNewPaicha(newZongpaiNo);
      return;
    }
    setState(() {
      _crossPaichaPending = false;
    });
  }

  Future<bool> _confirmCrossPaichaSwitch({
    required String newZongpaiNo,
    required String currentPaicha,
  }) async {
    final dialogFocus = FocusNode();
    var dismissed = false;
    var selectedIndex = 0; // 0 = "否" (default), 1 = "是"

    void dismissAsNo() {
      if (dismissed) return;
      dismissed = true;
      Navigator.of(context).pop(false);
    }

    void confirmSwitch() {
      if (dismissed) return;
      dismissed = true;
      Navigator.of(context).pop(true);
    }

    final dialogFuture = showDialog<bool>(
      context: context,
      barrierDismissible: false,
      builder: (ctx) => StatefulBuilder(
        builder: (ctx, setDialogState) {
          return KeyboardListener(
            focusNode: dialogFocus,
            onKeyEvent: (event) {
              if (event is! KeyDownEvent) return;
              if (event.logicalKey == LogicalKeyboardKey.arrowUp) {
                setDialogState(() => selectedIndex = 0);
              } else if (event.logicalKey == LogicalKeyboardKey.arrowDown) {
                setDialogState(() => selectedIndex = 1);
              } else if (event.logicalKey == LogicalKeyboardKey.enter) {
                selectedIndex == 0 ? dismissAsNo() : confirmSwitch();
              } else if (event.logicalKey == LogicalKeyboardKey.escape) {
                dismissAsNo();
              }
            },
            child: PopScope(
              canPop: false,
              onPopInvokedWithResult: (didPop, _) {
                if (!didPop) dismissAsNo();
              },
              child: AlertDialog(
                backgroundColor: Colors.orange.shade50,
                title: Row(
                  children: [
                    Icon(Icons.warning_amber, color: Colors.orange.shade800),
                    const SizedBox(width: 8),
                    Text(
                      '跨排产号扫描',
                      style: TextStyle(color: Colors.orange.shade900),
                    ),
                  ],
                ),
                content: Column(
                  mainAxisSize: MainAxisSize.min,
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: [
                    Text(
                      '总排号 $newZongpaiNo 不属于当前排产号（$currentPaicha），'
                      '是否切换到新的排产号？\n\n'
                      '选择「是」将放弃当前已扫描的所有数据。',
                      style: const TextStyle(fontSize: 14),
                    ),
                    const SizedBox(height: 16),
                    _dialogOptionBtn(
                      label: '否',
                      selected: selectedIndex == 0,
                      onTap: dismissAsNo,
                    ),
                    const SizedBox(height: 8),
                    _dialogOptionBtn(
                      label: '是，切换排产号',
                      selected: selectedIndex == 1,
                      onTap: confirmSwitch,
                    ),
                  ],
                ),
              ),
            ),
          );
        },
      ),
    );

    WidgetsBinding.instance.addPostFrameCallback((_) {
      dialogFocus.requestFocus();
    });
    final shouldSwitch = await dialogFuture;
    return shouldSwitch ?? false;
  }

  Widget _dialogOptionBtn({
    required String label,
    required bool selected,
    required VoidCallback onTap,
  }) {
    return SizedBox(
      width: double.infinity,
      height: 40,
      child: ElevatedButton(
        onPressed: onTap,
        style: ElevatedButton.styleFrom(
          backgroundColor: selected
              ? Colors.blue.shade700
              : Colors.grey.shade200,
          foregroundColor: selected ? Colors.white : Colors.black87,
          shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
        ),
        child: Text(
          label,
          style: TextStyle(
            fontWeight: selected ? FontWeight.w800 : FontWeight.w600,
          ),
        ),
      ),
    );
  }

  void _switchToNewPaicha(String newZongpaiNo) {
    _feedbackService.trigger(FeedbackEvent.paichanSwitch);
    setState(() {
      _crossPaichaPending = false;
      _zongpaiNos.clear();
      _zongpaiNos.add(newZongpaiNo);
      _overview = null;
      _overviewNotFound = false;
      _overviewError = null;
      _clearStatusOverride();
    });
    _loadOverview(newZongpaiNo);
  }
}