import 'package:drift/drift.dart';
import 'package:logging/logging.dart';
import 'package:twonly/globals.dart';
import 'package:twonly/src/database/tables/messages_table.dart';
import 'package:twonly/src/database/twonly_database.dart';
import 'package:twonly/src/json_models/message.dart';

part 'messages_dao.g.dart';

@DriftAccessor(tables: [Messages])
class MessagesDao extends DatabaseAccessor<TwonlyDatabase>
    with _$MessagesDaoMixin {
  // this constructor is required so that the main database can create an instance
  // of this object.
  MessagesDao(TwonlyDatabase db) : super(db);

  Stream<List<Message>> watchMessageNotOpened(int contactId) {
    return (select(messages)
          ..where((t) => t.openedAt.isNull() & t.contactId.equals(contactId))
          ..orderBy([(t) => OrderingTerm.desc(t.sendAt)]))
        .watch();
  }

  Stream<List<Message>> watchMediaMessageNotOpened(int contactId) {
    return (select(messages)
          ..where((t) =>
              t.openedAt.isNull() &
              t.contactId.equals(contactId) &
              t.messageOtherId.isNotNull() &
              t.kind.equals(MessageKind.media.name))
          ..orderBy([(t) => OrderingTerm.asc(t.sendAt)]))
        .watch();
  }

  Stream<List<Message>> watchLastMessage(int contactId) {
    return (select(messages)
          ..where((t) => t.contactId.equals(contactId))
          ..orderBy([(t) => OrderingTerm.desc(t.sendAt)])
          ..limit(1))
        .watch();
  }

  Stream<List<Message>> watchAllMessagesFrom(int contactId) {
    return (select(messages)
          ..where((t) =>
              t.contactId.equals(contactId) &
              t.contentJson.isNotNull() &
              (t.openedAt.isNull() |
                  t.openedAt.isBiggerThanValue(
                      DateTime.now().subtract(Duration(days: 1)))))
          ..orderBy([(t) => OrderingTerm.desc(t.sendAt)]))
        .watch();
  }

  Future removeOldMessages() {
    return (update(messages)
          ..where((t) =>
              t.openedAt.isSmallerThanValue(
                  DateTime.now().subtract(Duration(days: 1))) &
              t.kind.equals(MessageKind.textMessage.name)))
        .write(MessagesCompanion(contentJson: Value(null)));
  }

  Future<List<Message>> getAllMessagesPendingDownloading() {
    return (select(messages)
          ..where(
            (t) =>
                t.downloadState.equals(DownloadState.downloaded.index).not() &
                t.messageOtherId.isNotNull() &
                t.kind.equals(MessageKind.media.name),
          ))
        .get();
  }

  Future<List<Message>> getAllMessagesForRetransmitting() {
    return (select(messages)..where((t) => t.acknowledgeByServer.equals(false)))
        .get();
  }

  Future openedAllNonMediaMessages(int contactId) {
    final updates = MessagesCompanion(openedAt: Value(DateTime.now()));
    return (update(messages)
          ..where((t) =>
              t.contactId.equals(contactId) &
              t.messageOtherId.isNotNull() &
              t.openedAt.isNull() &
              t.kind.equals(MessageKind.media.name).not()))
        .write(updates);
  }

  Future updateMessageByOtherUser(
      int userId, int messageId, MessagesCompanion updatedValues) {
    return (update(messages)
          ..where((c) =>
              c.contactId.equals(userId) & c.messageId.equals(messageId)))
        .write(updatedValues);
  }

  Future updateMessageByOtherMessageId(
      int userId, int messageOtherId, MessagesCompanion updatedValues) {
    return (update(messages)
          ..where((c) =>
              c.contactId.equals(userId) &
              c.messageOtherId.equals(messageOtherId)))
        .write(updatedValues);
  }

  Future updateMessageByMessageId(
      int messageId, MessagesCompanion updatedValues) {
    return (update(messages)..where((c) => c.messageId.equals(messageId)))
        .write(updatedValues);
  }

  Future<int?> insertMessage(MessagesCompanion message) async {
    try {
      await twonlyDatabase.contactsDao
          .newMessageExchange(message.contactId.value);
      return await into(messages).insert(message);
    } catch (e) {
      Logger("twonlyDatabase").shout("Error while inserting message: $e");
      return null;
    }
  }

  Future deleteMessageById(int messageId) {
    return (delete(messages)..where((t) => t.messageId.equals(messageId))).go();
  }

  SingleOrNullSelectable<Message> getMessageByMessageId(int messageId) {
    return select(messages)..where((t) => t.messageId.equals(messageId));
  }
}