import 'dart:io';

import 'package:flutter/material.dart';
import 'package:libacflutter/Constants.dart';
import 'package:pokedex/Consts.dart';
import 'package:pokedex/Session.dart';
import 'package:pokedex/UpdateCheck.dart';
import 'package:pokedex/filters.dart';
import 'package:pokedex/pokemon.dart';
import 'package:pokedex/pokemonHelpers.dart';

class MainApp extends StatefulWidget {
  const MainApp({super.key});

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

class _MainAppState extends State<MainApp> {
  void toggleTheme() {
    setState(() {
      SessionData.darkMode = !SessionData.darkMode;
    });

    SessionData.finalize();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'PokeDex',
      theme: SessionData.darkMode ? ThemeData.dark() : ThemeData.light(),
      routes: {
        "/": (context) => Home(toggleTheme: toggleTheme),
        "/dex": (context) => DexEntry(),
        "/filters": (context) => FilterPage(),
        "/update": (context) => UpdateCheck(),
      },
    );
  }
}

class Home extends StatefulWidget {
  final VoidCallback toggleTheme;

  const Home({super.key, required this.toggleTheme});

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

class _HomeState extends State<Home> {
  @override
  void didChangeDependencies() {
    SessionData.callbacks.mainPage = widget.toggleTheme;
    SessionData.initialize();

    super.didChangeDependencies();
  }

  @override
  void dispose() {
    SessionData.callbacks.mainPage = null;

    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("PokeDex - ${SessionData.highestGenID()} Entries"),
        backgroundColor:
            SessionData.darkMode
                ? LibACFlutterConstants.TITLEBAR_COLOR
                : Colors.cyan,
        actions: [
          IconButton(
            onPressed: widget.toggleTheme,
            icon:
                SessionData.darkMode
                    ? Icon(Icons.sunny)
                    : Icon(Icons.mode_night),
          ),
        ],
      ),
      drawer: Drawer(
        elevation: 50,
        child: Column(
          children: [
            DrawerHeader(
              child: Column(
                children: [
                  Text(
                    "PokeDex - ${SessionData.highestGenID()} Entries",
                    style: TextStyle(fontSize: 24),
                  ),
                  Text(
                    "Version: ${Constants.VERSION}",
                    style: TextStyle(fontSize: 24),
                  ),
                ],
              ),
            ),
            ListTile(
              title: Text("Filters"),
              leading: Icon(Icons.filter),
              subtitle: Text("Opens the PokeDex filters"),
              onTap: () async {
                await Navigator.pushNamed(context, "/filters");
                setState(() {});
              },
            ),
            if (Platform.isIOS || Platform.isAndroid)
              ListTile(
                title: Text("U P D A T E"),
                subtitle: Text("Opens the update checker"),
                leading: Icon(Icons.update),
                onTap: () async {
                  await Navigator.pushNamed(context, "/update");
                  setState(() {});
                },
              ),
          ],
        ),
      ),
      body: Padding(
        padding: EdgeInsets.all(8),
        child: GridView.builder(
          itemBuilder: (builder, index) {
            return Card(
              elevation: 50,
              color: Color.fromARGB(255, 194, 94, 0),
              child: InkWell(
                onTap: () async {
                  await Navigator.pushNamed(context, "/dex", arguments: index);
                  setState(() {});
                },
                child: SizedBox(
                  width: 300,
                  height: 300,
                  child: Column(
                    children: [
                      Image.asset(
                        Pokemon.values[index].toDexPath(),
                        width: 64,
                        height: 64,
                      ),
                      Text(
                        Pokemon.values[index].printName(proper: true),
                        style: TextStyle(fontSize: 16, color: Colors.black),
                      ),
                      Text(
                        "#${Pokemon.values[index].id}",
                        style: TextStyle(fontSize: 16, color: Colors.black),
                      ),
                    ],
                  ),
                ),
              ),
            );
          },
          itemCount: SessionData.highestGenID(),
          gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
            crossAxisCount: 3,
          ),
        ),
      ),
    );
  }
}

class DexEntry extends StatefulWidget {
  const DexEntry({super.key});

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

class _DexEntryState extends State<DexEntry> {
  Pokemon _pkmn = Pokemon.Bulbasaur;

  @override
  void didChangeDependencies() {
    int index = ModalRoute.of(context)!.settings.arguments as int;
    _pkmn = Pokemon.values[index];

    SessionData.callbacks.dexDisplay = () async {
      setState(() {});
    };

    super.didChangeDependencies();
  }

  @override
  void dispose() {
    SessionData.callbacks.dexDisplay = null;

    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(_pkmn.printName(proper: true)),
        backgroundColor:
            SessionData.darkMode
                ? LibACFlutterConstants.TITLEBAR_COLOR
                : Colors.cyan,
      ),
      body: Padding(
        padding: EdgeInsets.all(8),
        child: SingleChildScrollView(
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Center(child: Image.asset(_pkmn.toDexPath())),
              Center(
                child: Text(
                  "ID: ${_pkmn.pokeDexID}",
                  style: TextStyle(fontSize: 24),
                ),
              ),
              Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text("Type: ", style: TextStyle(fontSize: 24)),
                  PokemonHelpers.getTypeWidgets(_pkmn),
                ],
              ),
              Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    "First Seen in Generation ${_pkmn.generation.name}",
                    style: TextStyle(fontSize: 24),
                  ),
                ],
              ),
              if (_pkmn.extraVariants.isNotEmpty)
                Text("Extra Variations: ", style: TextStyle(fontSize: 24)),
              if (_pkmn.extraVariants.isNotEmpty)
                PokemonHelpers.getVariations(_pkmn),

              SizedBox(height: 32),
              SingleChildScrollView(
                scrollDirection: Axis.horizontal,
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: PokemonHelpers.getEvolutions(0, _pkmn),
                ),
              ),
              if (SessionData.enableDescription && _pkmn.dexEntries.isNotEmpty)
                Text("Description: ", style: TextStyle(fontSize: 24)),
              if (SessionData.enableDescription && _pkmn.dexEntries.isNotEmpty)
                PokemonHelpers.printDescription(_pkmn),

              SizedBox(height: 50),

              if (_pkmn.locations.isNotEmpty)
                Text("Where to find:", style: TextStyle(fontSize: 24)),
              if (_pkmn.locations.isNotEmpty)
                PokemonHelpers.printLocations(_pkmn),
            ],
          ),
        ),
      ),
    );
  }
}