import 'package:flutter/material.dart';
import 'package:tatlock_ui/shared/components/data_grid/data_grid_column.dart';
import 'package:tatlock_ui/shared/components/data_grid/data_grid_config.dart';
import 'package:tatlock_ui/shared/components/data_grid/widgets/data_grid_actions_menu.dart';

/// A single data row in the DataGrid.
class DataGridRow<T> extends StatelessWidget {
  const DataGridRow({
    super.key,
    required this.item,
    required this.index,
    required this.config,
    this.isSelected = false,
    this.onSelect,
    this.onTap,
    this.backgroundColor,
  });

  final T item;
  final int index;
  final DataGridConfig<T> config;
  final bool isSelected;
  final VoidCallback? onSelect;
  final VoidCallback? onTap;
  final Color? backgroundColor;

  @override
  Widget build(BuildContext context) {
    final colorScheme = Theme.of(context).colorScheme;
    final columns = config.visibleColumns;

    // Determine row background color
    Color? bgColor = backgroundColor;
    if (bgColor == null && config.alternatingRowColors) {
      bgColor = index.isOdd
          ? colorScheme.surfaceContainerLowest
          : colorScheme.surface;
    }
    if (isSelected) {
      bgColor = colorScheme.primaryContainer.withValues(alpha: 0.3);
    }

    final rowContent = Container(
      height: config.rowHeight,
      constraints: config.rowHeight == null
          ? const BoxConstraints(minHeight: 48)
          : null,
      decoration: BoxDecoration(
        color: bgColor,
        border: Border(
          bottom: BorderSide(
            color: colorScheme.outlineVariant.withValues(alpha: 0.5),
          ),
        ),
      ),
      child: Row(
        children: [
          if (config.rowsSelectable)
            SizedBox(
              width: 56,
              child: Center(
                child: Checkbox(
                  value: isSelected,
                  onChanged: (_) => onSelect?.call(),
                ),
              ),
            ),
          ...columns.map((column) => _buildCell(context, column)),
          if (config.actions.isNotEmpty)
            SizedBox(
              width: 56,
              child: DataGridActionsMenu<T>(
                item: item,
                actions: config.actions,
              ),
            ),
        ],
      ),
    );

    if (onTap != null) {
      return InkWell(
        onTap: onTap,
        child: rowContent,
      );
    }

    return rowContent;
  }

  Widget _buildCell(BuildContext context, DataGridColumn<T> column) {
    Widget content;

    if (column.cellBuilder != null) {
      content = column.cellBuilder!(context, item);
    } else {
      content = Text(
        column.valueBuilder(item),
        textAlign: column.textAlign,
        overflow: TextOverflow.ellipsis,
      );
    }

    // Wrap with controls if provided
    if (column.cellControlsBuilder != null) {
      content = Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Flexible(child: content),
          const SizedBox(width: 8),
          column.cellControlsBuilder!(context, item),
        ],
      );
    }

    // Wrap with tooltip if provided
    if (column.tooltip != null) {
      content = Tooltip(
        message: column.tooltip!(item),
        child: content,
      );
    }

    final cell = Padding(
      padding: config.cellPadding,
      child: Align(
        alignment: switch (column.alignment) {
          DataGridColumnAlignment.start => Alignment.centerLeft,
          DataGridColumnAlignment.center => Alignment.center,
          DataGridColumnAlignment.end => Alignment.centerRight,
        },
        child: content,
      ),
    );

    return _wrapWithWidth(column.width, cell);
  }

  Widget _wrapWithWidth(DataGridColumnWidth width, Widget child) {
    return switch (width) {
      GridFixedWidth(:final width) => SizedBox(width: width, child: child),
      GridFlexWidth(:final flex) => Expanded(flex: flex, child: child),
      GridFractionWidth(:final fraction) => FractionallySizedBox(
          widthFactor: fraction,
          child: child,
        ),
    };
  }
}