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

import '../../core/exceptions.dart';
import '../../data/models/task.dart';
import '../../providers/notes_provider.dart';
import '../../providers/tasks_provider.dart';

class QuickCaptureScreen extends ConsumerStatefulWidget {
  const QuickCaptureScreen({super.key});

  @override
  ConsumerState<QuickCaptureScreen> createState() =>
      _QuickCaptureScreenState();
}

class _QuickCaptureScreenState extends ConsumerState<QuickCaptureScreen>
    with SingleTickerProviderStateMixin {
  late final TabController _tabs;
  final _noteTitleController = TextEditingController();
  final _noteContentController = TextEditingController();
  final _taskTitleController = TextEditingController();
  TaskPriority _taskPriority = TaskPriority.medium;
  bool _saving = false;

  @override
  void initState() {
    super.initState();
    _tabs = TabController(length: 2, vsync: this);
  }

  @override
  void dispose() {
    _tabs.dispose();
    _noteTitleController.dispose();
    _noteContentController.dispose();
    _taskTitleController.dispose();
    super.dispose();
  }

  Future<void> _saveNote() async {
    final title = _noteTitleController.text.trim();
    if (title.isEmpty) {
      ScaffoldMessenger.of(context)
          .showSnackBar(const SnackBar(content: Text('Title is required.')));
      return;
    }
    setState(() => _saving = true);
    try {
      await ref
          .read(notesProvider.notifier)
          .create(title, _noteContentController.text);
      if (mounted) context.pop();
    } on AppException catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context)
            .showSnackBar(SnackBar(content: Text(e.message)));
      }
    } finally {
      if (mounted) setState(() => _saving = false);
    }
  }

  Future<void> _saveTask() async {
    final title = _taskTitleController.text.trim();
    if (title.isEmpty) {
      ScaffoldMessenger.of(context)
          .showSnackBar(const SnackBar(content: Text('Title is required.')));
      return;
    }
    setState(() => _saving = true);
    try {
      await ref.read(tasksProvider.notifier).create(
            title: title,
            status: TaskStatus.todo,
            priority: _taskPriority,
          );
      if (mounted) context.pop();
    } on AppException catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context)
            .showSnackBar(SnackBar(content: Text(e.message)));
      }
    } finally {
      if (mounted) setState(() => _saving = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Quick Capture'),
        bottom: TabBar(
          controller: _tabs,
          tabs: const [Tab(text: 'Note'), Tab(text: 'Task')],
        ),
      ),
      body: TabBarView(
        controller: _tabs,
        children: [
          // Note tab
          Padding(
            padding: const EdgeInsets.all(16),
            child: Column(
              children: [
                TextField(
                  controller: _noteTitleController,
                  decoration: const InputDecoration(
                    labelText: 'Title',
                    border: OutlineInputBorder(),
                  ),
                  textInputAction: TextInputAction.next,
                  autofocus: true,
                ),
                const SizedBox(height: 12),
                Expanded(
                  child: TextField(
                    controller: _noteContentController,
                    decoration: const InputDecoration(
                      hintText: 'Content (optional, supports markdown)',
                      border: OutlineInputBorder(),
                      alignLabelWithHint: true,
                    ),
                    maxLines: null,
                    expands: true,
                    textAlignVertical: TextAlignVertical.top,
                    keyboardType: TextInputType.multiline,
                  ),
                ),
                const SizedBox(height: 12),
                SizedBox(
                  width: double.infinity,
                  child: FilledButton(
                    onPressed: _saving ? null : _saveNote,
                    child: _saving
                        ? const SizedBox(
                            height: 20,
                            width: 20,
                            child: CircularProgressIndicator(strokeWidth: 2),
                          )
                        : const Text('Save Note'),
                  ),
                ),
              ],
            ),
          ),
          // Task tab
          Padding(
            padding: const EdgeInsets.all(16),
            child: Column(
              children: [
                TextField(
                  controller: _taskTitleController,
                  decoration: const InputDecoration(
                    labelText: 'Task title',
                    border: OutlineInputBorder(),
                  ),
                  autofocus: true,
                ),
                const SizedBox(height: 12),
                DropdownButtonFormField<TaskPriority>(
                  initialValue: _taskPriority,
                  decoration: const InputDecoration(
                    labelText: 'Priority',
                    border: OutlineInputBorder(),
                  ),
                  items: TaskPriority.values
                      .map((p) =>
                          DropdownMenuItem(value: p, child: Text(p.label)))
                      .toList(),
                  onChanged: (v) => setState(() => _taskPriority = v!),
                ),
                const SizedBox(height: 16),
                SizedBox(
                  width: double.infinity,
                  child: FilledButton(
                    onPressed: _saving ? null : _saveTask,
                    child: _saving
                        ? const SizedBox(
                            height: 20,
                            width: 20,
                            child: CircularProgressIndicator(strokeWidth: 2),
                          )
                        : const Text('Save Task'),
                  ),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }
}