import 'package:flutter/material.dart';
import 'package:flutter/material.dart' as material;
import 'package:fmassive/database.dart';
import 'package:fmassive/days.dart';
import 'package:fmassive/exercises.dart';
import 'package:fmassive/main.dart';
import 'package:moor_flutter/moor_flutter.dart';

class EditPlanPage extends StatefulWidget {
  final PlansCompanion plan;

  const EditPlanPage({required this.plan, super.key});

  @override
  createState() => _EditPlanPageState();
}

class _EditPlanPageState extends State<EditPlanPage> {
  late PlansCompanion plan;
  List<String?> names = [];

  Future<List<String?>> getDistinctNames() async {
    final names = await (db.gymSets.selectOnly(distinct: true)
          ..addColumns([db.gymSets.name]))
        .get();
    return names.map((name) => name.read(db.gymSets.name)).toList();
  }

  @override
  void initState() {
    super.initState();

    getDistinctNames().then((value) {
      setState(() {
        names = value;
      });
    });

    plan = widget.plan;
  }

  @override
  dispose() {
    super.dispose();
  }

  Future<bool?> _showConfirmationDialog(BuildContext context) {
    return showDialog<bool>(
      context: context,
      barrierDismissible: false,
      builder: (BuildContext context) {
        return AlertDialog(
          title: const Text('Confirm Delete'),
          content: const Text('Are you sure you want to delete this plan?'),
          actions: <Widget>[
            ElevatedButton(
              child: const Text('Yes'),
              onPressed: () {
                Navigator.pop(context, true); // showDialog() returns true
              },
            ),
            ElevatedButton(
              child: const Text('No'),
              onPressed: () {
                Navigator.pop(context, false); // showDialog() returns false
              },
            ),
          ],
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    List<Widget> actions = [];
    if (widget.plan.id.present)
      actions.add(IconButton(
          onPressed: () async {
            bool? confirm = await _showConfirmationDialog(context);
            if (!confirm!) return;
            await db.plans.deleteOne(widget.plan);
            if (!mounted) return;
            Navigator.pop(context);
          },
          icon: const Icon(Icons.delete)));

    return SafeArea(
        child: Scaffold(
      appBar: AppBar(title: const Text('Edit Plan'), actions: actions),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: material.Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: getChildren,
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () async {
          if (plan.id.present)
            await db.update(db.plans).replace(plan);
          else
            await db.into(db.plans).insert(plan);
          if (!mounted) return;
          Navigator.pop(context);
        },
        child: const Icon(Icons.check),
      ),
    ));
  }

  List<Widget> get getChildren {
    return [
      Expanded(
        child: Days(
          onChanged: (days) {
            setState(() {
              plan = plan.copyWith(days: Value(days));
            });
          },
          days: plan.days.value,
        ),
      ),
      names.isNotEmpty
          ? Expanded(
              child: Exercises(
                onChanged: (exercises) {
                  setState(() {
                    plan = plan.copyWith(exercises: Value(exercises));
                  });
                },
                exercises: plan.exercises.value,
                names: names,
              ),
            )
          : const CircularProgressIndicator(),
    ];
  }
}