tasks/lib/pages/task_edit_page.dart

import 'package:flutter/material.dart';

import '../model/callback_models/create_task_request.dart';
import '../model/extensions/controller_context.dart';
import '../model/task.dart';
import '../service/task_controller.dart';
import '../service/tools.dart';
import '../service/validators.dart';

class TaskEditPage extends StatefulWidget {
  static const routeName = '/edit';
  const TaskEditPage({super.key});

  @override
  State<TaskEditPage> createState() => _TaskEditPageState();
}

class _TaskEditPageState extends State<TaskEditPage> {
  Task? task;
  final titleController = TextEditingController();
  final descriptionController = TextEditingController();
  final categoryController = TextEditingController();
  final urlController = TextEditingController();
  final dueDateController = TextEditingController();
  final dueTimeController = TextEditingController();
  late String pageTitle;

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    task = ModalRoute.of(context)!.settings.arguments as Task?;
    if (task != null) {
      titleController.text = task!.title;
      descriptionController.text = task!.description;
      categoryController.text = task!.category;
      urlController.text = task!.url;
      dueDateController.text = task!.due != null
          ? getIsoDateString(task!.due!)
          : '';
      dueTimeController.text = task!.due != null
          ? TimeOfDay.fromDateTime(task!.due!).format(context)
          : '';
    }
    pageTitle = task?.title ?? 'CreateTask';
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(pageTitle),
        actions: [
          if (task != null)
            IconButton(
              onPressed: () {
                context.controller<TaskController>().deleteTask(task!);
                Navigator.of(context).pop();
              },
              icon: Icon(Icons.delete),
            ),
        ],
      ),
      body: Form(
        autovalidateMode: AutovalidateMode.onUnfocus,
        child: Column(
          children: [
            TextFormField(
              autofocus: true,
              controller: titleController,
              decoration: InputDecoration(label: Text('Title')),
              keyboardType: TextInputType.text,
              textInputAction: TextInputAction.next,
            ),
            TextFormField(
              controller: descriptionController,
              decoration: InputDecoration(label: Text('Description')),
              keyboardType: TextInputType.text,
              textInputAction: TextInputAction.next,
            ),
            TextFormField(
              controller: dueDateController,
              onChanged: (value) {
                if (dateTimeValidator(value) == null) {}

                setState(() {});
              },
              decoration: InputDecoration(
                label: Text('Due Date'),
                suffix: IconButton(
                  onPressed: () async {
                    final result = await onOpenCalendarPickerPressed();
                    if (result != null) {
                      dueDateController.text = getIsoDateString(result);
                    }
                    setState(() {});
                  },
                  icon: Icon(Icons.calendar_month),
                ),
              ),
              validator: dateTimeValidator,
              keyboardType: TextInputType.text,
              textInputAction: TextInputAction.next,
            ),
            TextFormField(
              controller: dueTimeController,
              enabled: DateTime.tryParse(dueDateController.text) != null
                  ? true
                  : false,
              decoration: InputDecoration(
                label: Text('Due Time'),
                suffix: IconButton(
                  onPressed: () async {
                    final result = await onOpenTimePickerPressed();
                    if (result != null) {
                      setState(() {
                        dueTimeController.text = result.format(context);
                      });
                    }
                  },
                  icon: Icon(Icons.schedule),
                ),
              ),
              validator: timeValidator,
              keyboardType: TextInputType.text,
              textInputAction: TextInputAction.next,
            ),
            TextFormField(
              controller: categoryController,
              decoration: InputDecoration(label: Text('Category')),
              keyboardType: TextInputType.text,
              textInputAction: TextInputAction.next,
            ),
            TextFormField(
              controller: urlController,
              decoration: InputDecoration(label: Text('Url')),
              keyboardType: TextInputType.text,
              textInputAction: TextInputAction.next,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: onSavePressed,
        child: Icon(Icons.save),
      ),
    );
  }

  Future<DateTime?> onOpenCalendarPickerPressed() {
    return showDialog<DateTime?>(
      context: context,
      builder: (context) => DatePickerDialog(
        firstDate: DateTime(DateTime.now().year - 100),
        lastDate: DateTime(DateTime.now().year + 100),
        initialDate:
            DateTime.tryParse(dueDateController.text) ?? DateTime.now(),
      ),
    );
  }

  Future<TimeOfDay?> onOpenTimePickerPressed() {
    return showDialog<TimeOfDay?>(
      context: context,
      builder: (context) =>
          TimePickerDialog(initialTime: TimeOfDay(hour: 0, minute: 0)),
    );
  }

  void onSavePressed() {
    Navigator.of(context).pop(
      CreateTaskRequest(
        title: titleController.text,
        description: descriptionController.text,
        start: null,
        due: DateTime.tryParse(dueDateController.text),
        isCompleted: false,
        category: categoryController.text,
        subtasks: [],
        alarms: [],
        location: null,
        url: urlController.text,
      ),
    );
  }
}