import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_svg/svg.dart';
import 'package:stackwallet/models/isar/models/ethereum/eth_contract.dart';
import 'package:stackwallet/pages_desktop_specific/my_stack_view/dialogs/desktop_expanding_wallet_card.dart';
import 'package:stackwallet/providers/db/main_db_provider.dart';
import 'package:stackwallet/providers/providers.dart';
import 'package:stackwallet/services/coins/ethereum/ethereum_wallet.dart';
import 'package:stackwallet/services/coins/manager.dart';
import 'package:stackwallet/utilities/assets.dart';
import 'package:stackwallet/utilities/constants.dart';
import 'package:stackwallet/utilities/enums/coin_enum.dart';
import 'package:stackwallet/utilities/text_styles.dart';
import 'package:stackwallet/utilities/theme/stack_colors.dart';
import 'package:stackwallet/utilities/util.dart';
import 'package:stackwallet/widgets/background.dart';
import 'package:stackwallet/widgets/conditional_parent.dart';
import 'package:stackwallet/widgets/custom_buttons/app_bar_icon_button.dart';
import 'package:stackwallet/widgets/icon_widgets/x_icon.dart';
import 'package:stackwallet/widgets/master_wallet_card.dart';
import 'package:stackwallet/widgets/rounded_white_container.dart';
import 'package:stackwallet/widgets/stack_text_field.dart';
import 'package:stackwallet/widgets/textfield_icon_button.dart';
import 'package:stackwallet/widgets/wallet_card.dart';
import 'package:tuple/tuple.dart';

class WalletsOverview extends ConsumerStatefulWidget {
  const WalletsOverview({
    Key? key,
    required this.coin,
    this.navigatorState,
  }) : super(key: key);

  final Coin coin;
  final NavigatorState? navigatorState;

  static const routeName = "/walletsOverview";

  @override
  ConsumerState<WalletsOverview> createState() => _EthWalletsOverviewState();
}

class _EthWalletsOverviewState extends ConsumerState<WalletsOverview> {
  final isDesktop = Util.isDesktop;

  late final TextEditingController _searchController;
  late final FocusNode searchFieldFocusNode;

  String _searchString = "";

  final List<Tuple2<Manager, List<EthContract>>> wallets = [];

  List<Tuple2<Manager, List<EthContract>>> _filter(String searchTerm) {
    if (searchTerm.isEmpty) {
      return wallets;
    }

    final List<Tuple2<Manager, List<EthContract>>> results = [];
    final term = searchTerm.toLowerCase();

    for (final tuple in wallets) {
      bool includeManager = false;
      // search wallet name and total balance
      includeManager |= _elementContains(tuple.item1.walletName, term);
      includeManager |= _elementContains(
        tuple.item1.balance.total.decimal.toString(),
        term,
      );

      final List<EthContract> contracts = [];

      for (final contract in tuple.item2) {
        if (_elementContains(contract.name, term)) {
          contracts.add(contract);
        } else if (_elementContains(contract.symbol, term)) {
          contracts.add(contract);
        } else if (_elementContains(contract.type.name, term)) {
          contracts.add(contract);
        } else if (_elementContains(contract.address, term)) {
          contracts.add(contract);
        }
      }

      if (includeManager || contracts.isNotEmpty) {
        results.add(Tuple2(tuple.item1, contracts));
      }
    }

    return results;
  }

  bool _elementContains(String element, String term) {
    return element.toLowerCase().contains(term);
  }

  @override
  void initState() {
    _searchController = TextEditingController();
    searchFieldFocusNode = FocusNode();

    final walletsData =
        ref.read(walletsServiceChangeNotifierProvider).fetchWalletsData();
    walletsData.removeWhere((key, value) => value.coin != widget.coin);

    if (widget.coin == Coin.ethereum) {
      for (final data in walletsData.values) {
        final List<EthContract> contracts = [];
        final manager =
            ref.read(walletsChangeNotifierProvider).getManager(data.walletId);
        final contractAddresses = (manager.wallet as EthereumWallet)
            .getWalletTokenContractAddresses();

        // fetch each contract
        for (final contractAddress in contractAddresses) {
          final contract = ref
              .read(
                mainDBProvider,
              )
              .getEthContractSync(
                contractAddress,
              );

          // add it to list if it exists in DB
          if (contract != null) {
            contracts.add(contract);
          }
        }

        // add tuple to list
        wallets.add(
          Tuple2(
            ref.read(walletsChangeNotifierProvider).getManager(
                  data.walletId,
                ),
            contracts,
          ),
        );
      }
    } else {
      // add non token wallet tuple to list
      for (final data in walletsData.values) {
        wallets.add(
          Tuple2(
            ref.read(walletsChangeNotifierProvider).getManager(
                  data.walletId,
                ),
            [],
          ),
        );
      }
    }

    super.initState();
  }

  @override
  void dispose() {
    _searchController.dispose();
    searchFieldFocusNode.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return ConditionalParent(
      condition: !isDesktop,
      builder: (child) => Background(
        child: Scaffold(
          backgroundColor:
              Theme.of(context).extension<StackColors>()!.background,
          appBar: AppBar(
            leading: const AppBarBackButton(),
            title: Text(
              "${widget.coin.prettyName} (${widget.coin.ticker}) wallets",
              style: STextStyles.navBarTitle(context),
            ),
          ),
          body: SafeArea(
            child: Padding(
              padding: const EdgeInsets.all(16),
              child: child,
            ),
          ),
        ),
      ),
      child: Column(
        children: [
          ClipRRect(
            borderRadius: BorderRadius.circular(
              Constants.size.circularBorderRadius,
            ),
            child: TextField(
              autocorrect: !isDesktop,
              enableSuggestions: !isDesktop,
              controller: _searchController,
              focusNode: searchFieldFocusNode,
              onChanged: (value) {
                setState(() {
                  _searchString = value;
                });
              },
              style: isDesktop
                  ? STextStyles.desktopTextExtraSmall(context).copyWith(
                      color: Theme.of(context)
                          .extension<StackColors>()!
                          .textFieldActiveText,
                      height: 1.8,
                    )
                  : STextStyles.field(context),
              decoration: standardInputDecoration(
                "Search...",
                searchFieldFocusNode,
                context,
                desktopMed: isDesktop,
              ).copyWith(
                prefixIcon: Padding(
                  padding: EdgeInsets.symmetric(
                    horizontal: isDesktop ? 12 : 10,
                    vertical: isDesktop ? 18 : 16,
                  ),
                  child: SvgPicture.asset(
                    Assets.svg.search,
                    width: isDesktop ? 20 : 16,
                    height: isDesktop ? 20 : 16,
                  ),
                ),
                suffixIcon: _searchController.text.isNotEmpty
                    ? Padding(
                        padding: const EdgeInsets.only(right: 0),
                        child: UnconstrainedBox(
                          child: Row(
                            children: [
                              TextFieldIconButton(
                                child: const XIcon(),
                                onTap: () async {
                                  setState(() {
                                    _searchController.text = "";
                                    _searchString = "";
                                  });
                                },
                              ),
                            ],
                          ),
                        ),
                      )
                    : null,
              ),
            ),
          ),
          const SizedBox(
            height: 16,
          ),
          Expanded(
            child: Builder(
              builder: (context) {
                final data = _filter(_searchString);
                return ListView.separated(
                  itemBuilder: (_, index) {
                    final element = data[index];

                    if (element.item1.hasTokenSupport) {
                      if (isDesktop) {
                        return DesktopExpandingWalletCard(
                          key: Key(
                              "${element.item1.walletName}_${element.item2.map((e) => e.address).join()}"),
                          data: element,
                          navigatorState: widget.navigatorState!,
                        );
                      } else {
                        return MasterWalletCard(
                          walletId: element.item1.walletId,
                        );
                      }
                    } else {
                      return ConditionalParent(
                        condition: isDesktop,
                        builder: (child) => RoundedWhiteContainer(
                          padding: const EdgeInsets.symmetric(
                            vertical: 14,
                            horizontal: 20,
                          ),
                          borderColor: Theme.of(context)
                              .extension<StackColors>()!
                              .backgroundAppBar,
                          child: child,
                        ),
                        child: SimpleWalletCard(
                          walletId: element.item1.walletId,
                          popPrevious: isDesktop,
                          desktopNavigatorState:
                              isDesktop ? widget.navigatorState : null,
                        ),
                      );
                    }
                  },
                  separatorBuilder: (_, __) => SizedBox(
                    height: isDesktop ? 10 : 8,
                  ),
                  itemCount: data.length,
                );
              },
            ),
          ),
        ],
      ),
    );
  }
}