import 'package:flutter/material.dart';
import 'package:superport/screens/common/theme_shadcn.dart';

/// 표준 데이터 테이블 컬럼 정의
class DataColumn {
  final String label;
  final double? width;
  final int? flex;
  final bool isNumeric;
  final TextAlign textAlign;

  DataColumn({
    required this.label,
    this.width,
    this.flex,
    this.isNumeric = false,
    TextAlign? textAlign,
  }) : textAlign = textAlign ?? (isNumeric ? TextAlign.right : TextAlign.left);
}

/// 표준 데이터 테이블 위젯
/// 
/// 모든 리스트 화면에서 일관된 테이블 스타일 제공
class StandardDataTable extends StatelessWidget {
  final List<DataColumn> columns;
  final List<Widget> rows;
  final bool showCheckbox;
  final bool? isAllSelected;
  final ValueChanged<bool?>? onSelectAll;
  final bool enableHorizontalScroll;
  final ScrollController? horizontalScrollController;
  final Widget? emptyWidget;
  final bool applyZebraStripes; // 짝수 행 배경색 적용 여부

  const StandardDataTable({
    Key? key,
    required this.columns,
    required this.rows,
    this.showCheckbox = false,
    this.isAllSelected,
    this.onSelectAll,
    this.enableHorizontalScroll = false,
    this.horizontalScrollController,
    this.emptyWidget,
    this.applyZebraStripes = true,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    if (rows.isEmpty) {
      return _buildEmptyState();
    }

    final table = Container(
      width: double.infinity,
      decoration: BoxDecoration(
        color: ShadcnTheme.card,
        borderRadius: BorderRadius.circular(ShadcnTheme.radiusLg),
        border: Border.all(color: Colors.black),
        boxShadow: ShadcnTheme.cardShadow,
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // 테이블 헤더
          _buildHeader(),
          // 테이블 데이터 행들
          ...rows,
        ],
      ),
    );

    if (enableHorizontalScroll) {
      return SingleChildScrollView(
        scrollDirection: Axis.horizontal,
        controller: horizontalScrollController,
        child: table,
      );
    }

    return table;
  }

  Widget _buildHeader() {
    return Container(
      padding: const EdgeInsets.symmetric(
        horizontal: ShadcnTheme.spacing4,
        vertical: 10,
      ),
      decoration: BoxDecoration(
        color: ShadcnTheme.muted.withValues(alpha: 0.3),
        border: Border(
          bottom: BorderSide(color: Colors.black),
        ),
      ),
      child: Row(
        children: [
          // 체크박스 컬럼
          if (showCheckbox)
            SizedBox(
              width: 40,
              child: Checkbox(
                value: isAllSelected,
                onChanged: onSelectAll,
                tristate: false,
              ),
            ),
          
          // 데이터 컬럼들
          ...columns.map((column) {
            Widget child = Text(
              column.label,
              style: ShadcnTheme.bodyMedium.copyWith(
                fontWeight: FontWeight.bold,
              ),
              textAlign: column.textAlign,
            );

            if (column.width != null) {
              return SizedBox(
                width: column.width,
                child: child,
              );
            } else if (column.flex != null) {
              return Expanded(
                flex: column.flex!,
                child: child,
              );
            } else {
              return Expanded(child: child);
            }
          }),
        ],
      ),
    );
  }

  Widget _buildEmptyState() {
    return Container(
      width: double.infinity,
      padding: const EdgeInsets.all(ShadcnTheme.spacing8),
      decoration: BoxDecoration(
        color: ShadcnTheme.card,
        borderRadius: BorderRadius.circular(ShadcnTheme.radiusLg),
        border: Border.all(color: Colors.black),
        boxShadow: ShadcnTheme.cardShadow,
      ),
      child: emptyWidget ??
          Center(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Icon(
                  Icons.inbox_outlined,
                  size: 48,
                  color: ShadcnTheme.muted,
                ),
                const SizedBox(height: ShadcnTheme.spacing4),
                Text(
                  '데이터가 없습니다',
                  style: ShadcnTheme.bodyMuted,
                ),
              ],
            ),
          ),
    );
  }
}

/// 표준 데이터 행 위젯
class StandardDataRow extends StatelessWidget {
  final int index;
  final List<Widget> cells;
  final bool showCheckbox;
  final bool? isSelected;
  final ValueChanged<bool?>? onSelect;
  final bool applyZebraStripes;
  final List<DataColumn> columns;

  const StandardDataRow({
    Key? key,
    required this.index,
    required this.cells,
    this.showCheckbox = false,
    this.isSelected,
    this.onSelect,
    this.applyZebraStripes = true,
    required this.columns,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.symmetric(
        horizontal: ShadcnTheme.spacing4,
        vertical: 4,
      ),
      decoration: BoxDecoration(
        color: applyZebraStripes && index % 2 == 1
            ? ShadcnTheme.muted.withValues(alpha: 0.1)
            : null,
        border: Border(
          bottom: BorderSide(color: Colors.black),
        ),
      ),
      child: Row(
        children: [
          // 체크박스
          if (showCheckbox)
            SizedBox(
              width: 40,
              child: Checkbox(
                value: isSelected,
                onChanged: onSelect,
                tristate: false,
              ),
            ),
          
          // 데이터 셀들
          ...cells.asMap().entries.map((entry) {
            final cellIndex = entry.key;
            final cell = entry.value;
            
            if (cellIndex >= columns.length) return const SizedBox.shrink();
            
            final column = columns[cellIndex];
            
            if (column.width != null) {
              return SizedBox(
                width: column.width,
                child: cell,
              );
            } else if (column.flex != null) {
              return Expanded(
                flex: column.flex!,
                child: cell,
              );
            } else {
              return Expanded(child: cell);
            }
          }),
        ],
      ),
    );
  }
}

/// 표준 관리 버튼 세트
class StandardActionButtons extends StatelessWidget {
  final VoidCallback? onView;
  final VoidCallback? onEdit;
  final VoidCallback? onDelete;
  final List<Widget>? customButtons;
  final double buttonSize;

  const StandardActionButtons({
    Key? key,
    this.onView,
    this.onEdit,
    this.onDelete,
    this.customButtons,
    this.buttonSize = 32,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Row(
      mainAxisSize: MainAxisSize.min,
      children: [
        if (onView != null)
          _buildIconButton(
            Icons.visibility_outlined,
            onView!,
            '보기',
            ShadcnTheme.primary,
          ),
        if (onEdit != null)
          _buildIconButton(
            Icons.edit_outlined,
            onEdit!,
            '수정',
            ShadcnTheme.primary,
          ),
        if (onDelete != null)
          _buildIconButton(
            Icons.delete_outline,
            onDelete!,
            '삭제',
            ShadcnTheme.destructive,
          ),
        if (customButtons != null) ...customButtons!,
      ],
    );
  }

  Widget _buildIconButton(
    IconData icon,
    VoidCallback onPressed,
    String tooltip,
    Color color,
  ) {
    return IconButton(
      constraints: BoxConstraints(
        minWidth: buttonSize,
        minHeight: buttonSize,
        maxWidth: buttonSize,
        maxHeight: buttonSize,
      ),
      padding: const EdgeInsets.all(4),
      icon: Icon(icon, size: 16, color: color),
      onPressed: onPressed,
      tooltip: tooltip,
    );
  }
}