import 'dart:convert';

import 'package:drift/drift.dart';
import 'package:island/models/chat.dart';
import 'package:island/models/file.dart';

class MapConverter extends TypeConverter<Map<String, dynamic>, String> {
  const MapConverter();

  @override
  Map<String, dynamic> fromSql(String fromDb) => json.decode(fromDb);

  @override
  String toSql(Map<String, dynamic> value) => json.encode(value);
}

class ListStringConverter extends TypeConverter<List<String>, String> {
  const ListStringConverter();

  @override
  List<String> fromSql(String fromDb) => List<String>.from(json.decode(fromDb));

  @override
  String toSql(List<String> value) => json.encode(value);
}

class ListMapConverter
    extends TypeConverter<List<Map<String, dynamic>>, String> {
  const ListMapConverter();

  @override
  List<Map<String, dynamic>> fromSql(String fromDb) =>
      List<Map<String, dynamic>>.from(json.decode(fromDb));

  @override
  String toSql(List<Map<String, dynamic>> value) => json.encode(value);
}

class ChatMessages extends Table {
  TextColumn get id => text()();
  TextColumn get roomId => text()();
  TextColumn get senderId => text()();
  TextColumn get content => text().nullable()();
  TextColumn get nonce => text().nullable()();
  TextColumn get data => text()();
  DateTimeColumn get createdAt => dateTime()();
  IntColumn get status => intEnum<MessageStatus>()();
  BoolColumn get isDeleted =>
      boolean().nullable().withDefault(const Constant(false))();
  DateTimeColumn get updatedAt => dateTime().nullable()();
  DateTimeColumn get deletedAt => dateTime().nullable()();
  TextColumn get type => text().withDefault(const Constant('text'))();
  TextColumn get meta =>
      text().map(const MapConverter()).withDefault(const Constant('{}'))();
  TextColumn get membersMentioned =>
      text()
          .map(const ListStringConverter())
          .withDefault(const Constant('[]'))();
  DateTimeColumn get editedAt => dateTime().nullable()();
  TextColumn get attachments =>
      text().map(const ListMapConverter()).withDefault(const Constant('[]'))();
  TextColumn get reactions =>
      text().map(const ListMapConverter()).withDefault(const Constant('[]'))();
  TextColumn get repliedMessageId => text().nullable()();
  TextColumn get forwardedMessageId => text().nullable()();

  @override
  Set<Column> get primaryKey => {id};
}

class LocalChatMessage {
  final String id;
  final String roomId;
  final String senderId;
  final Map<String, dynamic> data;
  final DateTime createdAt;
  MessageStatus status;
  final String? nonce;
  List<UniversalFile>? localAttachments;
  bool isRead;

  LocalChatMessage({
    required this.id,
    required this.roomId,
    required this.senderId,
    required this.data,
    required this.createdAt,
    required this.nonce,
    required this.status,
    this.localAttachments,
    this.isRead = false,
  });

  SnChatMessage toRemoteMessage() {
    return SnChatMessage.fromJson(data);
  }

  static LocalChatMessage fromRemoteMessage(
    SnChatMessage message,
    MessageStatus status, {
    String? nonce,
    bool isRead = false,
  }) {
    return LocalChatMessage(
      id: message.id,
      roomId: message.chatRoomId,
      senderId: message.senderId,
      data: message.toJson(),
      createdAt: message.createdAt,
      status: status,
      nonce: nonce ?? message.nonce,
      isRead: isRead,
    );
  }
}

enum MessageStatus { pending, sent, failed }