import 'dart:math' as math;

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../models/programmer_task.model.dart';
import '../../providers/programmer_tasks_provider.dart';
import '../../widgets/quill_field.dart';

/// Edit a task's Title (plain) and Description (Quill). Saves via the existing
/// [ProgrammerTasksController.updateTask].
Future<void> showEditProgrammerTaskDialog(
  BuildContext context,
  WidgetRef ref,
  ProgrammerTask task,
) async {
  final titleCtrl = TextEditingController(text: task.title);
  final descQuill = quillControllerFromDelta(task.description);

  final ok = await showDialog<bool>(
    context: context,
    builder: (context) {
      final dialogWidth =
          math.min(480.0, MediaQuery.of(context).size.width - 48);
      return AlertDialog(
        semanticLabel: 'Edit task',
        title: const Text('Edit Task'),
        content: SizedBox(
          width: dialogWidth,
          child: SingleChildScrollView(
            child: Column(
              mainAxisSize: MainAxisSize.min,
              crossAxisAlignment: CrossAxisAlignment.stretch,
              children: [
                TextField(
                  controller: titleCtrl,
                  autofocus: true,
                  textCapitalization: TextCapitalization.sentences,
                  decoration: const InputDecoration(labelText: 'Title'),
                ),
                const SizedBox(height: 12),
                Align(
                  alignment: Alignment.centerLeft,
                  child: Text('Description',
                      style: Theme.of(context).textTheme.bodySmall),
                ),
                const SizedBox(height: 4),
                QuillFieldEditor(
                  controller: descQuill,
                  placeholder: 'Describe the task…',
                  height: 180,
                ),
              ],
            ),
          ),
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(context).pop(false),
            child: const Text('Cancel'),
          ),
          FilledButton(
            onPressed: () => Navigator.of(context).pop(true),
            child: const Text('Save'),
          ),
        ],
      );
    },
  );

  final title = titleCtrl.text.trim();
  titleCtrl.dispose();
  final description =
      quillPlainText(descQuill).isEmpty ? '' : quillToDeltaJson(descQuill);
  descQuill.dispose();
  if (ok != true || title.isEmpty || !context.mounted) return;

  final messenger = ScaffoldMessenger.of(context);
  try {
    await ref.read(programmerTasksControllerProvider).updateTask(
          taskId: task.id,
          title: title,
          description: description,
        );
    messenger.showSnackBar(const SnackBar(content: Text('Task updated')));
  } catch (e) {
    messenger.showSnackBar(SnackBar(content: Text('Could not update: $e')));
  }
}