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

class TaskDialog extends StatefulWidget {
  final Task? task;
  final ValueChanged<Task> onSave;

  const TaskDialog({super.key, this.task, required this.onSave});

  @override
  State<TaskDialog> createState() => _TaskDialogState();
}

class _TaskDialogState extends State<TaskDialog> {
  late TextEditingController _titleController;
  late TextEditingController _descController;
  late Priority _selectedPriority;
  DateTime? _selectedDueDate;
  DateTime? _selectedScheduleDate;
  final _formKey = GlobalKey<FormState>();

  @override
  void initState() {
    super.initState();
    _titleController = TextEditingController(text: widget.task?.title ?? '');
    _descController = TextEditingController(text: widget.task?.desc ?? '');
    _selectedPriority = widget.task?.priority ?? Priority.medium;
    _selectedDueDate = widget.task?.dueDate;
    _selectedScheduleDate = widget.task?.scheduleDate;
  }

  @override
  void dispose() {
    _titleController.dispose();
    _descController.dispose();
    super.dispose();
  }

  void onConfirmClick() {
    if (_formKey.currentState!.validate()) {
      final task = Task(
        id: widget.task?.id,
        title: _titleController.text,
        desc: _descController.text.isEmpty ? null : _descController.text,
        dueDate: _selectedDueDate,
        scheduleDate: _selectedScheduleDate,
        priority: _selectedPriority,
        isCompleted: widget.task?.isCompleted ?? false,
      );
      widget.onSave(task);
      Navigator.pop(context);
    }
  }

  @override
  Widget build(BuildContext context) {
    return ContentDialog(
      title: Center(child: Text(widget.task == null ? '添加任务' : '编辑任务')),
      content: _buildForm(),
      actions: [
        Button(
          child: const Text('取消'),
          onPressed: () => Navigator.pop(context),
        ),
        FilledButton(child: const Text('保存'), onPressed: onConfirmClick),
      ],
    );
  }

  Widget _buildForm() {
    return Form(
      key: _formKey,
      child: Column(
        mainAxisSize: MainAxisSize.min,
        children: [
          // 标题
          buildFormItem(
            label: '任务标题',
            required: true,
            child: TextFormBox(
              controller: _titleController,
              placeholder: '请输入任务标题',
              validator: (value) {
                if (value == null || value.isEmpty) {
                  return '任务标题不能为空';
                }
                return null;
              },
            ),
          ),
          const SizedBox(height: 16),

          // 描述
          buildFormItem(
            label: '任务描述',
            child: TextFormBox(
              controller: _descController,
              placeholder: '请输入任务描述',
              maxLines: 3,
            ),
          ),
          const SizedBox(height: 16),

          // 优先级
          buildFormItem(
            label: '优先级',
            child: RadioGroup<Priority>(
              groupValue: _selectedPriority,
              child: Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  RadioButton<Priority>(
                    value: Priority.low,
                    content: Text('低'),
                  ),
                  RadioButton<Priority>(
                    value: Priority.medium,
                    content: Text('中'),
                  ),
                  RadioButton<Priority>(
                    value: Priority.high,
                    content: Text('高'),
                  ),
                ],
              ),
              onChanged: (value) {
                if (value != null) {
                  setState(() {
                    _selectedPriority = value;
                  });
                }
              },
            ),
          ),
          const SizedBox(height: 16),

          // 截止日期
          buildFormItem(
            label: '截止日期',
            child: buildOmniDateButton(
              context: context,
              selectedDate: _selectedDueDate,
              placeholder: '请选择截止日期',
              type: OmniDateTimePickerType.date,
              onChanged: (date) {
                setState(() {
                  _selectedDueDate = date;
                });
              },
            ),
          ),
          const SizedBox(height: 16),

          // 提醒日期
          buildFormItem(
            label: '提醒日期',
            child: buildOmniDateButton(
              context: context,
              selectedDate: _selectedScheduleDate,
              placeholder: '请选择提醒日期',
              type: OmniDateTimePickerType.dateAndTime,
              onChanged: (date) {
                setState(() {
                  _selectedScheduleDate = date;
                });
              },
            ),
          ),
        ],
      ),
    );
  }
}