// ignore_for_file: invalid_use_of_protected_member

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

extension _RegistrationWidgetsPart on _RegistrationPageState {
  String _locationLabel(CodeType? type) {
    if (type == CodeType.locationTransit) return '转运区域';
    if (type == CodeType.locationTempStorage) return '暂存货架';
    return '普通货架';
  }

  Color _locationLabelColor(CodeType? type) {
    if (type == CodeType.locationTransit) return Colors.orange;
    if (type == CodeType.locationTempStorage) return const Color(0xFF7B1FA2);
    return Colors.blue;
  }

  Widget _buildModePill() {
    return BoxingModePill(
      isSingle: _mode == RegistrationMode.singleCode,
      label: _mode == RegistrationMode.singleCode ? '单码上架' : '多码上架',
      enabled: !_isSubmitting,
      onTap: _cycleMode,
    );
  }

  Widget _buildLocationChip() {
    final color = _locationLabelColor(_locationType);
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
      decoration: BoxDecoration(
        color: color.withValues(alpha: 0.15),
        borderRadius: BorderRadius.circular(4),
      ),
      child: Text(
        _locationLabel(_locationType),
        style: TextStyle(
          fontSize: 11,
          color: color,
          fontWeight: FontWeight.bold,
        ),
      ),
    );
  }

  // === Paicha Header ===

  Widget _buildPaichaHeader() {
    final overview = _overview;
    final hasData = overview?.success == true;
    final hasLoc = _locationCode != null;
    final stats = registration_calculations.overviewStats(overview);

    return Container(
      padding: const EdgeInsets.fromLTRB(12, 8, 12, 6),
      decoration: BoxDecoration(
        color: Colors.grey.shade50,
        border: Border(bottom: BorderSide(color: Colors.grey.shade300)),
      ),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          Text(
            hasData ? (overview!.paichaNo ?? '--') : '--',
            style: TextStyle(
              fontSize: 24,
              fontWeight: FontWeight.w800,
              color: hasData ? Colors.black87 : Colors.grey.shade400,
            ),
          ),
          const SizedBox(width: 12),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.end,
              children: [
                if (hasLoc)
                  Row(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      Text(
                        _locationCode!,
                        style: const TextStyle(
                          fontSize: 13,
                          fontWeight: FontWeight.w600,
                          color: Colors.black54,
                        ),
                      ),
                      const SizedBox(width: 5),
                      _buildLocationChip(),
                    ],
                  ),
                Row(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    _buildStatTag(
                      '共 ${stats.totalCount}',
                      const Color(0xFFE3F2FD),
                      const Color(0xFF1565C0),
                      hasData,
                    ),
                    _buildStatTag(
                      '上架 ${stats.shelvedCount}',
                      const Color(0xFFE8F5E9),
                      const Color(0xFF2E7D32),
                      hasData,
                    ),
                    _buildStatTag(
                      '转运 ${stats.transferredCount}',
                      const Color(0xFFFFF3E0),
                      const Color(0xFFE65100),
                      hasData,
                    ),
                    _buildStatTag(
                      '暂存 ${stats.tempStoredCount}',
                      const Color(0xFFF3E5F5),
                      const Color(0xFF7B1FA2),
                      hasData,
                    ),
                  ],
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildStatTag(String text, Color bg, Color fg, bool hasData) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 7, vertical: 1),
      margin: const EdgeInsets.only(left: 5),
      decoration: BoxDecoration(
        color: hasData ? bg : const Color(0xFFF5F5F5),
        borderRadius: BorderRadius.circular(10),
      ),
      child: Text(
        text,
        style: TextStyle(
          fontSize: 10,
          fontWeight: FontWeight.w700,
          color: hasData ? fg : Colors.grey.shade400,
        ),
      ),
    );
  }

  // === Table Head ===

  Widget _buildTableHead() {
    return Container(
      height: 28,
      padding: const EdgeInsets.symmetric(horizontal: 12),
      decoration: BoxDecoration(
        color: Colors.grey.shade200,
        border: Border(bottom: BorderSide(color: Colors.grey.shade400)),
      ),
      child: const Row(
        children: [
          Expanded(
            flex: 22,
            child: Text(
              '总排号',
              textAlign: TextAlign.center,
              style: _headerStyle,
            ),
          ),
          Expanded(
            flex: 18,
            child: Text(
              '工令号',
              textAlign: TextAlign.center,
              style: _headerStyle,
            ),
          ),
          Expanded(
            flex: 12,
            child: Text('数量', textAlign: TextAlign.center, style: _headerStyle),
          ),
          Expanded(
            flex: 28,
            child: Text(
              '货位号',
              textAlign: TextAlign.center,
              style: _headerStyle,
            ),
          ),
        ],
      ),
    );
  }

  // === List Body ===

  Widget _buildListBody() {
    if (_overviewZongpaiNo == null) {
      return _buildListMessage('扫描总排号后自动显示排产号上架情况');
    }
    if (_overviewLoading && _overview == null) {
      return _buildListMessage('正在加载排产号上架情况…');
    }
    if (_overviewNotFound) {
      return _buildListMessage('暂无排产信息');
    }
    if (_overviewError != null && _overview == null) {
      return _buildListError(_overviewError!);
    }
    final overview = _overview;
    if (overview == null || !overview.success) {
      return _buildListMessage('扫描总排号后自动显示排产号上架情况');
    }

    final sections = registration_calculations.splitOverviewItems(
      overview: overview,
      zongpaiNos: _zongpaiNos,
    );
    final scanned = sections.scanned;
    final unscanned = sections.unscanned;

    return Column(
      children: [
        if (_overviewError != null)
          Container(
            padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
            color: Colors.red.shade50,
            child: Row(
              children: [
                Expanded(
                  child: Text(
                    _overviewError!,
                    style: const TextStyle(fontSize: 12, color: Colors.red),
                  ),
                ),
                TextButton(
                  onPressed: _overviewZongpaiNo == null
                      ? null
                      : () => _loadOverview(_overviewZongpaiNo!, force: true),
                  child: const Text('重试'),
                ),
              ],
            ),
          ),
        Expanded(
          child: ListView.builder(
            itemCount:
                scanned.length +
                (sections.hasDivider ? 1 : 0) +
                unscanned.length,
            itemBuilder: (context, index) {
              if (index < scanned.length) {
                return _buildListRow(scanned[index], isScanned: true);
              }
              if (index == scanned.length && sections.hasDivider) {
                return _buildSectionDivider(unscanned.length);
              }
              final unscannedIdx =
                  index - scanned.length - (sections.hasDivider ? 1 : 0);
              return _buildListRow(unscanned[unscannedIdx], isScanned: false);
            },
          ),
        ),
      ],
    );
  }

  Widget _buildSectionDivider(int count) {
    return Container(
      height: 24,
      padding: const EdgeInsets.symmetric(horizontal: 12),
      decoration: BoxDecoration(
        border: Border(bottom: BorderSide(color: Colors.grey.shade200)),
      ),
      child: Row(
        children: [
          const Expanded(child: Divider(height: 0)),
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 8),
            child: Text(
              '以下 $count 项未操作',
              style: TextStyle(
                fontSize: 10,
                fontWeight: FontWeight.w600,
                color: Colors.grey.shade500,
              ),
            ),
          ),
          const Expanded(child: Divider(height: 0)),
        ],
      ),
    );
  }

  Widget _buildListRow(PaichaOverviewItem item, {required bool isScanned}) {
    final rowStyle = TextStyle(
      fontSize: 15,
      fontWeight: isScanned ? FontWeight.w700 : FontWeight.w500,
      color: Colors.black87,
    );

    final barColor = registration_calculations.registrationBarColor(
      status: item.status,
      isScanned: isScanned,
      isTransitTarget: _isTransitTarget,
      isTempStorageTarget: _isTempStorageTarget,
    );
    final bgColor = registration_calculations.registrationRowBgColor(
      status: item.status,
      isScanned: isScanned,
      isTransitTarget: _isTransitTarget,
      isTempStorageTarget: _isTempStorageTarget,
    );

    return Container(
      constraints: const BoxConstraints(minHeight: 36),
      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
      decoration: BoxDecoration(
        color: bgColor,
        border: Border(
          left: BorderSide(color: barColor, width: 3),
          bottom: BorderSide(color: Colors.grey.shade200),
        ),
      ),
      child: Row(
        children: [
          Expanded(
            flex: 22,
            child: Text(
              item.zongpaiNo,
              textAlign: TextAlign.center,
              overflow: TextOverflow.ellipsis,
              style: rowStyle,
            ),
          ),
          Expanded(
            flex: 18,
            child: Text(
              item.workOrderNo ?? '--',
              textAlign: TextAlign.center,
              overflow: TextOverflow.ellipsis,
              style: rowStyle,
            ),
          ),
          Expanded(
            flex: 12,
            child: Text(
              item.quantity.toString(),
              textAlign: TextAlign.center,
              overflow: TextOverflow.ellipsis,
              style: rowStyle,
            ),
          ),
          Expanded(
            flex: 28,
            child: Text(
              item.locationCode ?? '\u2014',
              textAlign: TextAlign.center,
              overflow: TextOverflow.ellipsis,
              style: rowStyle,
            ),
          ),
          if (isScanned && _mode == RegistrationMode.multiCode) ...[
            const SizedBox(width: 6),
            SizedBox(
              width: 28,
              height: 28,
              child: IconButton(
                icon: Icon(Icons.delete_outline, size: 16),
                color: Colors.red,
                onPressed: () => _removeZongpai(item.zongpaiNo),
                padding: EdgeInsets.zero,
                constraints: const BoxConstraints(minWidth: 28, minHeight: 28),
              ),
            ),
          ],
        ],
      ),
    );
  }

  Widget _buildListMessage(String text) {
    return Center(
      child: Text(
        text,
        textAlign: TextAlign.center,
        style: TextStyle(fontSize: 13, color: Colors.grey.shade600),
      ),
    );
  }

  Widget _buildListError(String text) {
    return Center(
      child: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          Text(
            text,
            textAlign: TextAlign.center,
            style: const TextStyle(fontSize: 13, color: Colors.red),
          ),
          const SizedBox(height: 6),
          TextButton(
            onPressed: _overviewZongpaiNo == null
                ? null
                : () => _loadOverview(_overviewZongpaiNo!, force: true),
            child: const Text('重试'),
          ),
        ],
      ),
    );
  }

  // === Bottom Bar ===

  Widget _buildBottomBar(ColorScheme colorScheme) {
    return Container(
      decoration: BoxDecoration(
        color: Colors.white,
        border: Border(top: BorderSide(color: Colors.grey.shade300)),
      ),
      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
      child: SizedBox(
        width: double.infinity,
        height: 34,
        child: ElevatedButton(
          onPressed: _canSubmit ? _submit : null,
          style: ElevatedButton.styleFrom(
            backgroundColor: registrationSubmitColor(
              canSubmit: _canSubmit,
              isTransitTarget: _isTransitTarget,
              primaryColor: colorScheme.primary,
            ),
            foregroundColor: _canSubmit ? Colors.white : Colors.grey.shade600,
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(6),
            ),
          ),
          child: _isSubmitting
              ? const SizedBox(
                  width: 18,
                  height: 18,
                  child: CircularProgressIndicator(
                    strokeWidth: 2,
                    color: Colors.white,
                  ),
                )
              : Text(
                  registrationSubmitLabel(
                    isTransitTarget: _isTransitTarget,
                    isMultiCode: _mode == RegistrationMode.multiCode,
                    zongpaiCount: _zongpaiNos.length,
                  ),
                  style: const TextStyle(
                    fontSize: 14,
                    fontWeight: FontWeight.w700,
                  ),
                ),
        ),
      ),
    );
  }
}

const _headerStyle = TextStyle(fontSize: 10, fontWeight: FontWeight.w700);