import 'dart:async';
import 'dart:io';

import 'package:flutter/material.dart';
import 'package:libac_dart/nbt/Stream.dart';
import 'package:libacflutter/Constants.dart';
import 'package:pokedex/Session.dart';
import 'package:pokedex/pokemon.dart';

Future<int> main(List<String> args) async {
  runApp(CompletedGenerator());

  return 0;
}

class CompletedGenerator extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _completedGen();
  }
}

class _completedGen extends State<CompletedGenerator> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(theme: ThemeData.dark(), home: MainGen());
  }
}

class MainGen extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _main();
  }
}

class _main extends State<MainGen> {
  bool firstLaunch = true;
  double progress = 0;
  String statusMessage = "";
  Generation gen = Generation.One;
  StringBuilder sb = StringBuilder();
  int index = 0;
  Generation? currentGen = null;
  int maxTasks = 5;

  int state = 0;

  @override
  void didChangeDependencies() {
    if (firstLaunch) {
      firstLaunch = false;
      setState(() {
        statusMessage = "Warming up...";
        progress = 0.0;
      });

      Timer.periodic(Duration(milliseconds: 100), (x) async {
        if (state == 0) {
          sleep(Duration(seconds: 5));
          statusMessage = "Acquiring game generation";
          progress = 0.25;
          setState(() {});

          state++;
        } else if (state == 1) {
          SessionData.resetHighestGenCache();
          int highest = SessionData.highestGenID();
          // Get actual generation
          gen = Generation.One;
          for (var _gen in Generation.values) {
            if (_gen.idStart < highest) {
              gen = _gen;
            }
          }

          statusMessage = "Generation acquired";
          progress = 1.0;
          state++;

          setState(() {});
        } else if (state == 2) {
          statusMessage = "Generation ${gen.name}";

          progress = 0.0;
          state++;

          setState(() {});
        } else if (state == 3) {
          statusMessage = "Analyzing Pokemon...";
          index = 0;
          currentGen = null;
          state++;

          setState(() {});
        } else if (state == 4) {
          maxTasks += Pokemon.values.length;
          state++;
          setState(() {});
        } else if ((state - index) == 5) {
          // Pokemon iteration task
          int iterNumber = state - 5;

          if (iterNumber >= Pokemon.values.length) {
            state++;
            setState(() {});
            return;
          }

          var pokemon = Pokemon.values[iterNumber];

          if (currentGen != pokemon.generation) {
            sb.append("\n# Generation ${pokemon.generation.name}\n\n");
            currentGen = pokemon.generation;
          }

          progress = index * 100 / Pokemon.values.length;
          statusMessage =
              ("- Analysis of pokemon ${pokemon.pokemonName} has begun");

          // TODO : This needs to check locations and dex entries to see if they are up to date with the latest generation.
          // The future task should take into account the generation the pokemon was introduced in. (EX. If introduced in gen 2, it won't have data entries for gen 1).

          if (pokemon.locations.isEmpty && pokemon.dexEntries.isEmpty) {
            sb.append("- [ ] ${pokemon.pokemonName}\n");
          } else {
            if (pokemon.locations.isNotEmpty && pokemon.dexEntries.isNotEmpty) {
              sb.append("- [x] ${pokemon.pokemonName}\n");
            } else if (pokemon.locations.isNotEmpty) {
              sb.append("- [ ] ${pokemon.pokemonName} (MISSING DEX ENTRIES)\n");
            } else if (pokemon.dexEntries.isNotEmpty) {
              sb.append(
                "- [ ] ${pokemon.pokemonName} (MISSING LOCATION ENTRIES)\n",
              );
            }
          }
          index++;
          progress = progress / 100; // push it into a 0-1 range.
          state++;

          setState(() {});
        } else if (state - index == 6) {
          // Task - write file
          maxTasks += 3;
          statusMessage = "Saving to COMPLETED.md";
          File complete = File("COMPLETED.md");
          progress = 99.75;
          state++;
          setState(() {});
          await complete.writeAsString(sb.toString());
        } else if (state - index == 7) {
          statusMessage = "Data generation completed";
          progress = 1.0;
          state++;
          setState(() {});
        } else if (state - index == 8) {
          x.cancel();
          sleep(Duration(seconds: 10));
          exit(0);
        }
      });
    }
    super.didChangeDependencies();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Data Generator"),
        backgroundColor: LibACFlutterConstants.TITLEBAR_COLOR,
      ),
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text("Status: ${statusMessage}", style: TextStyle(fontSize: 24)),
          Text("Progress: ${progress * 100}%", style: TextStyle(fontSize: 24)),
          Text("Task ${state}/${maxTasks}", style: TextStyle(fontSize: 24)),
          LinearProgressIndicator(value: progress, minHeight: 30),
        ],
      ),
    );
  }
}