import 'package:fluent_ui/fluent_ui.dart';
import 'package:task_hub/models/task.dart';

class TaskItem extends StatelessWidget {
  final Task task;
  final VoidCallback onToggleComplete;
  final VoidCallback onEdit;
  final VoidCallback onDelete;
  final ValueChanged<Priority> onPriorityChanged;

  const TaskItem({
    super.key,
    required this.task,
    required this.onToggleComplete,
    required this.onEdit,
    required this.onDelete,
    required this.onPriorityChanged,
  });

  @override
  Widget build(BuildContext context) {
    return Card(
      child: Padding(
        padding: const EdgeInsets.all(12.0),
        child: Row(
          children: [
            // 完成状态复选框
            Checkbox(
              checked: task.isCompleted,
              onChanged: (value) => onToggleComplete(),
            ),
            const SizedBox(width: 12),
            // 任务信息
            Expanded(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Row(
                    children: [
                      // 优先级指示器
                      _buildPriorityIndicator(task.priority),
                      const SizedBox(width: 8),
                      Expanded(
                        child: Text(
                          task.title,
                          style: TextStyle(
                            fontSize: 16,
                            fontWeight: FontWeight.w500,
                            decoration:
                            task.isCompleted
                                ? TextDecoration.lineThrough
                                : null,
                            color: task.isCompleted ? Colors.grey : Colors.red,
                          ),
                        ),
                      ),
                    ],
                  ),
                  const SizedBox(height: 2),
                  if (task.description != null && task.description!.isNotEmpty)
                    Padding(
                      padding: const EdgeInsets.only(top: 4.0),
                      child: Text(
                        task.description!,
                        style: TextStyle(
                          color: Colors.grey,
                          fontSize: 14,
                          decoration:
                          task.isCompleted
                              ? TextDecoration.lineThrough
                              : null,
                        ),
                      ),
                    ),
                  const SizedBox(height: 2),
                  if (task.dueDate != null)
                    Padding(
                      padding: const EdgeInsets.only(top: 4.0),
                      child: Row(
                        children: [
                          const Icon(
                            FluentIcons.calendar,
                            size: 12,
                            color: Colors.grey,
                          ),
                          const SizedBox(width: 4),
                          Text(
                            '截止: ${_formatDate(task.dueDate!)}',
                            style: const TextStyle(
                              color: Colors.grey,
                              fontSize: 12,
                            ),
                          ),
                        ],
                      ),
                    ),
                ],
              ),
            ),
            // 操作按钮
            Row(
              children: [
                // 编辑按钮
                IconButton(
                  icon: const Icon(FluentIcons.edit, size: 16),
                  onPressed: onEdit,
                ),
                // 删除按钮
                IconButton(
                  icon: const Icon(FluentIcons.delete, size: 16),
                  onPressed: onDelete,
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildPriorityIndicator(Priority priority) {
    final Map<Priority, (Color, String)> priorityInfo = {
      Priority.low: (Colors.grey, '低'),
      Priority.medium: (Colors.green, '中'),
      Priority.high: (Colors.red, '高'),
    };

    final (color, label) = priorityInfo[priority]!;
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 3),
      decoration: BoxDecoration(
        color: color,
        borderRadius: BorderRadius.circular(4),
      ),
      child: Center(
        child: Text(
          label,
          style: const TextStyle(
            color: Colors.white,
            fontSize: 10,
            fontWeight: FontWeight.bold,
          ),
        ),
      ),
    );
  }

  String _formatDate(DateTime date) {
    return '${date.year}-${date.month.toString().padLeft(2, '0')}-${date.day.toString().padLeft(2, '0')}';
  }
}