import 'package:flutter/material.dart';
import 'dart:math' as math;
import 'package:flutter/services.dart';
import 'package:shadcn_ui/shadcn_ui.dart';
import 'package:superport/data/models/zipcode_dto.dart';

class ZipcodeTable extends StatelessWidget {
  final List<ZipcodeDto> zipcodes;
  final int currentPage;
  final int totalPages;
  final Function(int) onPageChanged;
  final Function(ZipcodeDto) onSelect;
  // Optional: cap the effective viewport width used by the table
  final double? maxWidthCap;

  const ZipcodeTable({
    super.key,
    required this.zipcodes,
    required this.currentPage,
    required this.totalPages,
    required this.onPageChanged,
    required this.onSelect,
    this.maxWidthCap,
  });

  void _copyToClipboard(BuildContext context, String text, String label) {
    Clipboard.setData(ClipboardData(text: text));
    
    ShadToaster.of(context).show(
      ShadToast(
        title: Text('$label 복사됨'),
        description: Text(text),
        duration: const Duration(seconds: 2),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    final theme = ShadTheme.of(context);

    return Column(
      children: [
        Expanded(
          child: ShadCard(
            child: LayoutBuilder(
              builder: (context, constraints) {
                // 고정폭 + 마지막 filler
                const double minW = 160 + 180 + 180 + 320 + 140 + 24;
                final double viewportW = constraints.maxWidth.isFinite
                    ? constraints.maxWidth
                    : MediaQuery.sizeOf(context).width;
                final double cappedW = maxWidthCap != null
                    ? math.min(viewportW, maxWidthCap!)
                    : viewportW;
                final double tableW = cappedW >= minW ? cappedW : minW;
                const double etcW = 320.0;

                return SingleChildScrollView(
                  scrollDirection: Axis.horizontal,
                  child: SizedBox(
                    width: tableW,
                    child: ShadTable.list(
                      columnSpanExtent: (index) {
                        switch (index) {
                          case 0:
                            return const FixedTableSpanExtent(160); // 우편번호
                          case 1:
                            return const FixedTableSpanExtent(180); // 시도
                          case 2:
                            return const FixedTableSpanExtent(180); // 구/군
                          case 3:
                            return const FixedTableSpanExtent(etcW); // 상세주소
                          case 4:
                            return const FixedTableSpanExtent(140); // 작업
                          case 5:
                            return const RemainingTableSpanExtent(); // filler
                          default:
                            return const FixedTableSpanExtent(100);
                        }
                      },
                      header: [
                        const ShadTableCell.header(child: Text('우편번호')),
                        const ShadTableCell.header(child: Text('시도')),
                        const ShadTableCell.header(child: Text('구/군')),
                        ShadTableCell.header(child: SizedBox(width: etcW, child: const Text('상세주소'))),
                        const ShadTableCell.header(child: Text('작업')),
                        const ShadTableCell.header(child: SizedBox.shrink()),
                      ],
                      children: zipcodes.map((zipcode) {
                        return [
                      // 우편번호 (오버플로우 방지)
                      ShadTableCell(
                        child: SizedBox(
                          width: 160,
                          child: FittedBox(
                            alignment: Alignment.centerLeft,
                            fit: BoxFit.scaleDown,
                            child: Row(
                              mainAxisSize: MainAxisSize.min,
                              children: [
                                Container(
                                  padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                                  decoration: BoxDecoration(
                                    color: theme.colorScheme.primary.withValues(alpha: 0.1),
                                    borderRadius: BorderRadius.circular(6),
                                  ),
                                  child: Text(
                                    zipcode.zipcode.toString().padLeft(5, '0'),
                                    style: TextStyle(
                                      fontWeight: FontWeight.w600,
                                      color: theme.colorScheme.primary,
                                      fontFamily: 'monospace',
                                    ),
                                  ),
                                ),
                                const SizedBox(width: 8),
                                ShadButton.ghost(
                                  onPressed: () => _copyToClipboard(context, zipcode.zipcode.toString().padLeft(5, '0'), '우편번호'),
                                  size: ShadButtonSize.sm,
                                  child: Icon(Icons.copy, size: 14, color: theme.colorScheme.mutedForeground),
                                ),
                              ],
                            ),
                          ),
                        ),
                      ),
                          // 시도
                          ShadTableCell(
                            child: Row(
                              children: [
                                Icon(Icons.location_city, size: 16, color: theme.colorScheme.mutedForeground),
                                const SizedBox(width: 6),
                                Flexible(child: Text(zipcode.sido, overflow: TextOverflow.ellipsis, style: const TextStyle(fontWeight: FontWeight.w500))),
                              ],
                            ),
                          ),
                          // 구/군
                          ShadTableCell(
                            child: Row(
                              children: [
                                Icon(Icons.location_on, size: 16, color: theme.colorScheme.mutedForeground),
                                const SizedBox(width: 6),
                                Flexible(child: Text(zipcode.gu, overflow: TextOverflow.ellipsis, style: const TextStyle(fontWeight: FontWeight.w500))),
                              ],
                            ),
                          ),
                          // 상세주소 (가변 폭)
                          ShadTableCell(
                            child: SizedBox(
                              width: etcW,
                              child: Row(
                                children: [
                                  Expanded(child: Text(zipcode.etc, overflow: TextOverflow.ellipsis, style: TextStyle(color: theme.colorScheme.foreground))),
                                  const SizedBox(width: 8),
                                  ShadButton.ghost(
                                    onPressed: () => _copyToClipboard(context, zipcode.fullAddress, '전체주소'),
                                    size: ShadButtonSize.sm,
                                    child: Icon(Icons.copy, size: 14, color: theme.colorScheme.mutedForeground),
                                  ),
                                ],
                              ),
                            ),
                          ),
                          // 작업
                          ShadTableCell(
                            child: ShadButton(
                              onPressed: () => onSelect(zipcode),
                              size: ShadButtonSize.sm,
                              child: const Text('선택', style: TextStyle(fontSize: 11)),
                            ),
                          ),
                          const ShadTableCell(child: SizedBox.shrink()),
                        ];
                      }).toList(),
                    ),
                  ),
                );
              },
            ),
          ),
        ),
        
        // 페이지네이션
        if (totalPages > 1)
          Container(
            padding: const EdgeInsets.all(16),
            decoration: BoxDecoration(
              border: Border(
                top: BorderSide(
                  color: theme.colorScheme.border,
                  width: 1,
                ),
              ),
            ),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                ShadButton.ghost(
                  onPressed: currentPage > 1
                      ? () => onPageChanged(currentPage - 1)
                      : null,
                  size: ShadButtonSize.sm,
                  child: const Icon(Icons.chevron_left, size: 16),
                ),
                const SizedBox(width: 8),
                
                // 페이지 번호 표시
                ...List.generate(
                  totalPages > 7 ? 7 : totalPages,
                  (index) {
                    int pageNumber;
                    if (totalPages <= 7) {
                      pageNumber = index + 1;
                    } else if (currentPage <= 4) {
                      pageNumber = index + 1;
                    } else if (currentPage >= totalPages - 3) {
                      pageNumber = totalPages - 6 + index;
                    } else {
                      pageNumber = currentPage - 3 + index;
                    }
                    
                    if (pageNumber > totalPages) return const SizedBox.shrink();
                    
                    return Padding(
                      padding: const EdgeInsets.symmetric(horizontal: 2),
                      child: pageNumber == currentPage
                          ? ShadButton(
                              onPressed: () => onPageChanged(pageNumber),
                              size: ShadButtonSize.sm,
                              child: Text(pageNumber.toString()),
                            )
                          : ShadButton.outline(
                              onPressed: () => onPageChanged(pageNumber),
                              size: ShadButtonSize.sm,
                              child: Text(pageNumber.toString()),
                            ),
                    );
                  },
                ),
                
                const SizedBox(width: 8),
                ShadButton.ghost(
                  onPressed: currentPage < totalPages
                      ? () => onPageChanged(currentPage + 1)
                      : null,
                  size: ShadButtonSize.sm,
                  child: const Icon(Icons.chevron_right, size: 16),
                ),
                const SizedBox(width: 24),
                
                // 페이지 정보
                Text(
                  '페이지 $currentPage / $totalPages',
                  style: theme.textTheme.muted,
                ),
              ],
            ),
          ),
      ],
    );
  }

  
}