import 'dart:async';

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

class StartPlan extends StatefulWidget {
  final PlansCompanion plan;

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

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

class _StartPlanState extends State<StartPlan> {
  late List<String> exercises;
  List<int> counts = [];
  List<int> totals = [];
  int selectedExercise = 0;
  final repsController = TextEditingController();
  final repsNode = FocusNode();
  final weightController = TextEditingController();
  final weightNode = FocusNode();
  int current = 0;
  int minutes = 3;
  int seconds = 30;
  Timer? timer;

  void startTimer() {
    setState(() {
      current = minutes * 60 * 1000 + seconds * 1000;
    });
    timer = Timer.periodic(const Duration(seconds: 1), (timer) {
      print("StartPlan: current=$current");
      if (current == 0)
        setState(() {
          timer.cancel();
        });
      else
        setState(() {
          current -= 1000;
        });
    });
  }

  Future<void> getTotals() async {
    final query = await (db.selectOnly(db.gymSets)
          ..addColumns([db.gymSets.name, db.gymSets.sets])
          ..where(db.gymSets.name.isIn(exercises))
          ..groupBy([db.gymSets.name, db.gymSets.sets]))
        .map(
          (row) =>
              MapEntry(row.read(db.gymSets.name), row.read(db.gymSets.sets)),
        )
        .get();
    final map = Map.fromIterables(
      query.map((entry) => entry.key),
      query.map((entry) => entry.value),
    );
    setState(() {
      totals = [];
      for (var exercise in exercises) {
        totals.add(map[exercise] ?? 0);
      }
    });
    print("totals=$totals");
  }

  Future<void> getCounts() async {
    var countExp = db.gymSets.name.count();
    final today = DateTime.now().toIso8601String().split('T')[0];
    final query = await (db.selectOnly(db.gymSets)
          ..addColumns([countExp, db.gymSets.name])
          ..where(db.gymSets.created.contains(today))
          ..groupBy([db.gymSets.name]))
        .map((row) => MapEntry(row.read(db.gymSets.name), row.read(countExp)))
        .get();
    final map = Map.fromIterables(
      query.map((entry) => entry.key),
      query.map((entry) => entry.value),
    );
    setState(() {
      counts = [];
      for (var exercise in exercises) {
        counts.add(map[exercise] ?? 0);
      }
    });
    print("counts=$counts");
  }

  Future<void> focus(int index) async {
    final name = exercises[index];
    final sets = await (db.gymSets.select()
          ..where((gymSet) => gymSet.name.contains(name))
          ..orderBy([
            (u) => OrderingTerm(expression: u.created, mode: OrderingMode.desc),
          ])
          ..limit(1))
        .get();
    final firstSet = sets.first;
    setState(() {
      repsController.text = firstSet.reps.toString();
      repsController.selection = TextSelection(
        baseOffset: 0,
        extentOffset: firstSet.reps.toString().length,
      );
      weightController.text = firstSet.weight.toString();
      minutes = firstSet.minutes;
      seconds = firstSet.seconds;
    });
  }

  @override
  void initState() {
    super.initState();
    exercises = widget.plan.exercises.value.split(',');
    repsNode.requestFocus();
    getCounts();
    getTotals();
    focus(selectedExercise);
  }

  @override
  dispose() {
    super.dispose();
    timer?.cancel();
  }

  @override
  Widget build(BuildContext context) {
    if (totals.isEmpty || counts.isEmpty) return Container();

    return SafeArea(
      child: Scaffold(
        appBar: AppBar(title: const Text('Start plan')),
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: material.Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Expanded(
                child: ListView.builder(
                  itemBuilder: ((context, index) {
                    return ListTile(
                      title: Text(exercises[index]),
                      subtitle: Text("${counts[index]}/${totals[index]}"),
                      onTap: () {
                        setState(() {
                          selectedExercise = index;
                          focus(index);
                        });
                      },
                      leading: Radio<int>(
                        value: index,
                        groupValue: selectedExercise,
                        onChanged: (value) {
                          print("onChanged $value");
                          if (value == null) return;
                          setState(() {
                            selectedExercise = value;
                            focus(index);
                          });
                        },
                      ),
                    );
                  }),
                  itemCount: exercises.length,
                ),
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Reps'),
                controller: repsController,
                focusNode: repsNode,
                onTap: () {
                  repsController.selection = TextSelection(
                    baseOffset: 0,
                    extentOffset: repsController.text.length,
                  );
                },
              ),
              TextFormField(
                decoration: const InputDecoration(labelText: 'Weight'),
                controller: weightController,
                focusNode: weightNode,
                onTap: () {
                  weightController.selection = TextSelection(
                    baseOffset: 0,
                    extentOffset: weightController.text.length,
                  );
                },
              ),
              LinearProgressIndicator(
                value: current / (minutes * 60 * 1000 + seconds * 1000),
              ),
            ],
          ),
        ),
        floatingActionButton: FloatingActionButton(
          onPressed: () async {
            final gymSet = GymSetsCompanion(
              created: Value(DateTime.now().toIso8601String()),
              name: Value(exercises[selectedExercise]),
              reps: Value(int.tryParse(repsController.text) ?? 0),
              weight: Value(double.tryParse(weightController.text) ?? 0),
            );
            await db.into(db.gymSets).insert(gymSet);
            const platform = MethodChannel('com.massive/android');
            platform
                .invokeMethod('timer', [minutes * 60 * 1000 + seconds * 1000]);
            startTimer();
            await getCounts();
          },
          child: const Icon(Icons.check),
        ),
      ),
    );
  }
}