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

import 'package:dynamic_color/dynamic_color.dart';
import 'package:flex_color_picker/flex_color_picker.dart';
import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';
import 'package:flutter_iconpicker/flutter_iconpicker.dart';
import 'package:prasule/api/category.dart';
import 'package:prasule/api/wallet.dart';
import 'package:prasule/api/wallet_manager.dart';
import 'package:prasule/main.dart';
import 'package:prasule/pw/platformbutton.dart';
import 'package:prasule/pw/platformfield.dart';
import 'package:prasule/pw/platformroute.dart';
import 'package:prasule/util/text_color.dart';
import 'package:prasule/util/utils.dart';
import 'package:prasule/views/settings/settings.dart';
import 'package:prasule/views/setup.dart';
import 'package:shared_preferences/shared_preferences.dart';

/// Allows adding, editing or removing [WalletCategory]s
class EditCategoriesView extends StatefulWidget {
  /// Allows adding, editing or removing [WalletCategory]s
  const EditCategoriesView({super.key});

  @override
  State<EditCategoriesView> createState() => _EditCategoriesViewState();
}

class _EditCategoriesViewState extends State<EditCategoriesView> {
  Wallet? selectedWallet;
  List<Wallet> wallets = [];

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

  Future<void> loadWallet() async {
    wallets = await WalletManager.listWallets();
    if (wallets.isEmpty && mounted) {
      unawaited(
        Navigator.of(context)
            .pushReplacement(platformRoute((c) => const SetupView())),
      );
      return;
    }
    selectedWallet = wallets.first;
    logger.i(selectedWallet!.categories);
    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: DropdownButton<int>(
          value:
              (selectedWallet == null) ? -1 : wallets.indexOf(selectedWallet!),
          items: [
            ...wallets.map(
              (e) => DropdownMenuItem(
                value: wallets.indexOf(
                  e,
                ),
                child: Text(e.name),
              ),
            ),
            DropdownMenuItem(
              value: -1,
              child: Text(AppLocalizations.of(context).newWallet),
            ),
          ],
          onChanged: (v) async {
            if (v == null || v == -1) {
              await Navigator.of(context).push(
                platformRoute(
                  (c) => const SetupView(
                    newWallet: true,
                  ),
                ),
              );
              wallets = await WalletManager.listWallets();
              logger.i(wallets.length);
              selectedWallet = wallets.last;
              setState(() {});
              return;
            }
            selectedWallet = wallets[v];
            setState(() {});
          },
        ),
        actions: [
          PopupMenuButton(
            itemBuilder: (context) => [
              AppLocalizations.of(context).settings,
              AppLocalizations.of(context).about,
            ].map((e) => PopupMenuItem(value: e, child: Text(e))).toList(),
            onSelected: (value) {
              if (value == AppLocalizations.of(context).settings) {
                Navigator.of(context).push(
                  platformRoute(
                    (context) => const SettingsView(),
                  ),
                );
              } else if (value == AppLocalizations.of(context).about) {
                showAbout(context);
              }
            },
          ),
        ],
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: selectedWallet == null
            ? [const CircularProgressIndicator()]
            : [
                Text(
                  AppLocalizations.of(context).setupCategoriesEditHint,
                  textAlign: TextAlign.center,
                ),
                IconButton(
                  onPressed: () async {
                    selectedWallet!.categories.add(
                      WalletCategory(
                        name: AppLocalizations.of(context)
                            .setupWalletNamePlaceholder,
                        id: selectedWallet!.nextCategoryId,
                        icon: IconData(
                          Icons.question_mark.codePoint,
                          fontFamily: 'MaterialIcons',
                        ),
                        color: Colors.blueGrey.harmonizeWith(
                          Theme.of(context).colorScheme.primary,
                        ),
                      ),
                    );
                    await WalletManager.saveWallet(selectedWallet!);
                    setState(() {});
                  },
                  icon: const Icon(Icons.add),
                ),
                SizedBox(
                  height: MediaQuery.of(context).size.height * 0.64,
                  child: ListView.builder(
                    shrinkWrap: true,
                    itemBuilder: (context, i) => (i == 0)
                        ? const SizedBox()
                        : ListTile(
                            leading: GestureDetector(
                              onTap: () async {
                                final icon = await showIconPicker(
                                  context,
                                  iconPackModes: [
                                    if (!Platform.isIOS && !Platform.isMacOS)
                                      IconPack.material,
                                    if (Platform.isIOS || Platform.isMacOS)
                                      IconPack.cupertino,
                                  ],
                                  // adaptiveDialog: true,
                                );
                                if (icon != null) {
                                  selectedWallet!.categories[i].icon = icon;
                                }
                                final materialEnabled =
                                    (await SharedPreferences.getInstance())
                                            .getBool("useMaterialYou") ??
                                        false;
                                if (!context.mounted) return;
                                await showAdaptiveDialog<void>(
                                  context: context,
                                  builder: (c) => AlertDialog.adaptive(
                                    actions: [
                                      PlatformButton(
                                        text: AppLocalizations.of(context).done,
                                        onPressed: () {
                                          Navigator.of(c).pop();
                                        },
                                      ),
                                    ],
                                    title: Text(
                                      AppLocalizations.of(context).pickColor,
                                    ),
                                    content: Column(
                                      children: [
                                        ColorPicker(
                                          pickersEnabled: {
                                            ColorPickerType.wheel: true,
                                            ColorPickerType.primary: false,
                                            ColorPickerType.custom: false,
                                            ColorPickerType.bw: false,
                                            ColorPickerType.accent:
                                                materialEnabled,
                                          },
                                          color: selectedWallet!
                                              .categories[i].color,
                                          onColorChanged: (color) {
                                            selectedWallet!
                                                .categories[i].color = color;
                                            setState(() {});
                                          },
                                        ),
                                      ],
                                    ),
                                  ),
                                );
                                await WalletManager.saveWallet(selectedWallet!);
                                setState(() {});
                              },
                              child: Container(
                                decoration: BoxDecoration(
                                  borderRadius: BorderRadius.circular(16),
                                  color: selectedWallet!.categories[i].color,
                                ),
                                child: Padding(
                                  padding: const EdgeInsets.all(8),
                                  child: Icon(
                                    selectedWallet!.categories[i].icon,
                                    color: selectedWallet!.categories[i].color
                                        .calculateTextColor(),
                                  ),
                                ),
                              ),
                            ),
                            trailing: IconButton(
                              icon: const Icon(Icons.cancel),
                              onPressed: () async {
                                await selectedWallet!.removeCategory(
                                  selectedWallet!.categories[i],
                                );
                                setState(() {});
                              },
                            ),
                            title: GestureDetector(
                              onTap: () {
                                final controller = TextEditingController(
                                  text: selectedWallet!.categories[i].name,
                                );
                                showAdaptiveDialog<void>(
                                  context: context,
                                  builder: (c) => AlertDialog.adaptive(
                                    actions: [
                                      TextButton(
                                        onPressed: () async {
                                          if (controller.text.isEmpty) return;
                                          selectedWallet!.categories[i].name =
                                              controller.text;
                                          await WalletManager.saveWallet(
                                            selectedWallet!,
                                          );
                                          if (!context.mounted) return;
                                          Navigator.of(context).pop();
                                        },
                                        child: Text(
                                          AppLocalizations.of(context).ok,
                                        ),
                                      ),
                                      TextButton(
                                        onPressed: () {
                                          Navigator.of(context).pop();
                                        },
                                        child: Text(
                                          AppLocalizations.of(context).cancel,
                                        ),
                                      ),
                                    ],
                                    title: Text(
                                      AppLocalizations.of(context)
                                          .setupCategoriesEditingName,
                                    ),
                                    content: SizedBox(
                                      width: 400,
                                      child:
                                          PlatformField(controller: controller),
                                    ),
                                  ),
                                );
                              },
                              child: Text(
                                selectedWallet!.categories[i].name,
                                style: const TextStyle(
                                  fontWeight: FontWeight.bold,
                                ),
                              ),
                            ),
                          ),
                    itemCount: selectedWallet!.categories.length,
                  ),
                ),
              ],
      ),
    );
  }
}