import "package:cw_core/cake_hive.dart";
import "package:cw_core/db/sqlite.dart";
import "package:cw_core/erc20_token.dart" as erc20_new;
import "package:cw_core/hive_type_ids.dart";
import "package:cw_core/utils/print_verbose.dart";
import "package:cw_core/wallet_info.dart";
import "package:cw_core/wallet_type.dart";
import "package:hive/hive.dart";
import "package:sqflite/sqflite.dart";

part "erc20_token_legacy.part.dart";

Future<void> performErc20TokenHiveMigration() async {
  try {
    if (!CakeHive.isAdapterRegistered(Erc20Token.typeId)) {
      CakeHive.registerAdapter(Erc20TokenAdapter());
    }

    final wallets = await WalletInfo.getAll();
    await Erc20Token.migrateAllToSqlite(wallets);
  } catch (e) {
    printV("Error performing Erc20Token Hive migration: $e, continuing anyway");
  }
}

// @HiveType(typeId: Erc20Token.typeId)
class Erc20Token extends HiveObject {
  Erc20Token({
    required this.name,
    required this.symbol,
    required this.contractAddress,
    required this.decimal,
    bool enabled = true,
    this.iconPath,
    this.tag,
    this.isPotentialScam = false,
  }) : _enabled = enabled;
  // @HiveField(0)
  final String name;
  // @HiveField(1)
  final String symbol;
  // @HiveField(2)
  final String contractAddress;
  // @HiveField(3)
  final int decimal;
  // @HiveField(4, defaultValue: true)
  bool _enabled;
  // @HiveField(5)
  String? iconPath;
  // @HiveField(6)
  final String? tag;
  // @HiveField(7, defaultValue: false)
  bool isPotentialScam;

  bool get enabled => _enabled;

  set enabled(bool value) => _enabled = value;

  static const typeId = ERC20_TOKEN_TYPE_ID;
  static const boxName = "Erc20Tokens";
  static const ethereumBoxName = "EthereumErc20Tokens";
  static const polygonBoxName = "PolygonErc20Tokens";
  static const baseBoxName = "BaseErc20Tokens";
  static const arbitrumBoxName = "ArbitrumErc20Tokens";
  static const bscBoxName = "BscErc20Tokens";

  static const chainIdToBoxSuffix = {
    1: ethereumBoxName,
    137: polygonBoxName,
    8453: baseBoxName,
    42161: arbitrumBoxName,
    56: bscBoxName,
  };

  static const evmWalletTypes = [
    WalletType.ethereum,
    WalletType.polygon,
    WalletType.base,
    WalletType.arbitrum,
    WalletType.bsc,
  ];

  static Future<void> migrateAllToSqlite(List<WalletInfo> wallets) async {
    await _migrateLegacyGlobalBox(wallets);

    final sanitizedToRawNames = <String, Set<String>>{};
    for (final wallet in wallets) {
      if (!evmWalletTypes.contains(wallet.type)) {
        continue;
      }

      sanitizedToRawNames
          .putIfAbsent(wallet.name.replaceAll(" ", "_"), () => <String>{})
          .add(wallet.name);
    }

    for (final entry in sanitizedToRawNames.entries) {
      for (final chainEntry in chainIdToBoxSuffix.entries) {
        final tokenBoxName = "${entry.key}_${chainEntry.value}";
        try {
          if (!await CakeHive.boxExists(tokenBoxName)) {
            continue;
          }

          final box = await CakeHive.openBox<Erc20Token>(tokenBoxName);

          for (final group in _mergeByLowercaseContract(box)) {
            for (final rawName in entry.value) {
              await group.token.migrateToSqlite(walletName: rawName, chainId: chainEntry.key);
            }
            await box.deleteAll(group.sourceKeys);
          }

          await box.deleteFromDisk();
        } catch (e) {
          printV("Error migrating erc20 token box $tokenBoxName: $e, continuing anyway");
        }
      }
    }
  }

  static Future<void> _migrateLegacyGlobalBox(List<WalletInfo> wallets) async {
    try {
      if (!await CakeHive.boxExists(boxName)) {
        return;
      }

      if (!wallets.any((wallet) => wallet.type == WalletType.ethereum)) {
        return;
      }

      final box = await CakeHive.openBox<Erc20Token>(boxName);
      final ethereumWallets =
          wallets.where((wallet) => wallet.type == WalletType.ethereum).toList();

      for (final group in _mergeByLowercaseContract(box)) {
        for (final wallet in ethereumWallets) {
          await group.token.migrateToSqlite(walletName: wallet.name, chainId: 1);
        }
        await box.deleteAll(group.sourceKeys);
      }

      await box.deleteFromDisk();
    } catch (e) {
      printV("Error migrating legacy global erc20 token box: $e, continuing anyway");
    }
  }

  static List<_MergedTokenGroup> _mergeByLowercaseContract(Box<Erc20Token> box) {
    final groups = <String, _MergedTokenGroup>{};

    for (final key in box.keys) {
      final token = box.get(key);
      if (token == null) {
        continue;
      }

      final lowerKey = token.contractAddress.toLowerCase();
      final existing = groups[lowerKey];

      if (existing == null) {
        groups[lowerKey] = _MergedTokenGroup(token: token, sourceKeys: [key]);
        continue;
      }

      groups[lowerKey] = _MergedTokenGroup(
        token: Erc20Token(
          name: token.name,
          symbol: token.symbol,
          contractAddress: lowerKey,
          decimal: token.decimal,
          enabled: token.enabled || existing.token.enabled,
          iconPath:
              (token.iconPath?.isNotEmpty ?? false) ? token.iconPath : existing.token.iconPath,
          tag: token.tag ?? existing.token.tag,
          isPotentialScam: token.isPotentialScam || existing.token.isPotentialScam,
        ),
        sourceKeys: [...existing.sourceKeys, key],
      );
    }

    return groups.values.toList();
  }

  Future<void> migrateToSqlite({required String walletName, required int chainId}) async {
    final row = erc20_new.Erc20Token(
      name: name,
      symbol: symbol,
      contractAddress: contractAddress,
      decimal: decimal,
      enabled: _enabled,
      iconPath: iconPath,
      tag: tag,
      isPotentialScam: isPotentialScam,
      walletName: walletName,
      chainId: chainId,
    ).toMap();
    row[erc20_new.Erc20Token.selfIdColumn] = null;

    await db!.insert(
      erc20_new.Erc20Token.tableName,
      row,
      conflictAlgorithm: ConflictAlgorithm.replace,
    );
  }
}

class _MergedTokenGroup {
  _MergedTokenGroup({required this.token, required this.sourceKeys});

  final Erc20Token token;
  final List<dynamic> sourceKeys;
}