import 'package:flutter/cupertino.dart';
import 'package:huixiang/constant.dart';
import 'package:huixiang/im/database/message.dart';
import 'package:huixiang/im/database/migration.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:sqflite/sqflite.dart';

import '../../retrofit/data/im_user.dart';

class HxDatabase {
  Database db;

  void open({String key}) async {
    // _migrations.add(Migration(3, 4, (Database database) async {
    //   await database.execute('ALTER TABLE ImUser ADD COLUMN IF NOT EXISTS `isTop` INTEGER DEFAULT 0');
    // }));

    String databaseName = 'hx.db';
    if (key?.isNotEmpty ?? false) {
      databaseName = 'hx_$key.db';
    }
    await openDatabase(databaseName, version: 1, onCreate: (Database db, int version) async {
      db.execute('CREATE TABLE IF NOT EXISTS `Message` (`id` INTEGER, `conversationId` VARCHAR(40), `fromId` VARCHAR(20), `toId` VARCHAR(20), `replyId` VARCHAR(20), `content` TEXT, `attach` TEXT, `msgType` INTEGER, `time` VARCHAR(20), `state` INTEGER, `isDelete` INTEGER, PRIMARY KEY (`id`))');
      db.execute('CREATE TABLE IF NOT EXISTS `ImUser` (`id` INTEGER, `mid` VARCHAR(20), `nickname` VARCHAR(20), `avatar` VARCHAR(200), `phone` VARCHAR(200), `isDelete` INTEGER, `isTop` INTEGER, PRIMARY KEY (`id`))');
    }, onConfigure: (database) async {
      await database.execute('PRAGMA foreign_keys = ON');
      debugPrint("database-version: ${await database.getVersion()}");
    }, onUpgrade: (database, startVersion, endVersion) async {
      await runMigrations(database, startVersion, endVersion, _migrations);
    }, onOpen: (Database db) {
      this.db = db;
    });
  }

  void close() {
    db.close();
  }

  _dbIsOpen() async {
    if (db == null || !db.isOpen) {
      var sp = await SharedPreferences.getInstance();
      open(key: sp.getString("userId"));
    }
  }

  Future<Message> lastMessage(String conversationId) async {
    await _dbIsOpen();
    String sql = 'SELECT * FROM Message WHERE conversationId = ? ORDER BY time DESC LIMIT 1';
    List<Message> messages = await db.rawQuery(sql, [conversationId]).then((value) {
      return value.map((e) {
        debugPrint("Message: $e");
        return Message.fromJson(e);
      }).toList();
    }, onError: (error) {
      debugPrint("Message_error: $error");
    });
    return (messages?.isNotEmpty ?? false) ? messages.first : null;
  }

  Future<List<Message>> queryList() async{
    await _dbIsOpen();
    String sql = '''SELECT * 
            FROM `Message` 
            WHERE ROWID IN (
              SELECT ROWID 
              FROM (
                SELECT ROWID, conversationId, MAX(`time`) AS max_time
                FROM `Message` 
                GROUP BY conversationId
              ) AS grouped_messages
              WHERE max_time = (
                SELECT MAX(`time`) 
                FROM `Message` 
                WHERE conversationId = grouped_messages.conversationId
              )
            )
            ORDER BY `time` DESC;''';
    return db.rawQuery(sql).then((value) {
      return value.map((e) {
        debugPrint("Message: $e");
        return Message.fromJson(e);
      }).toList();
    }, onError: (error) {
      debugPrint("Message-error: $error");
    });
  }

  Future<List<Message>> queryUList(conversationId, {int page = 1, int pageSize = 10}) async{
    await _dbIsOpen();
    int start = (page - 1) * pageSize;
    String sql = 'SELECT * FROM Message WHERE conversationId = ? ORDER BY time DESC LIMIT ?, ?';
    return db.rawQuery(sql, [conversationId, start, pageSize]).then((value) {
      return value.map((e) => Message.fromJson(e)).toList();
    }, onError: (error) {
      debugPrint("Message-error: $error");
    });
  }

  Future<List<Message>> queryTList(conversationId) async{
    await _dbIsOpen();
    String sql = 'SELECT *, time / 300000 * 300000 AS time_interval FROM Message WHERE conversationId = ? GROUP BY time_interval ORDER BY time DESC';
    return db.rawQuery(sql, [conversationId]).then((value) {
      return value.map((e) => Message.fromJson(e)).toList();
    }, onError: (error) {
      debugPrint("Message-error: $error");
    });
  }

  Future<Map<String, int>> messageUnreadCount(List<String> conversationIds) async {
    await _dbIsOpen();
    String userStr = conversationIds.join("','");
    debugPrint("userStr: $userStr");
    List<Message> messages = await db.query("Message",
      where: "conversationId IN ('$userStr') AND state = 0 AND isDelete = 0",
      whereArgs: [],
    ).then((value) {
      return value.map((e) => Message.fromJson(e)).toList();
    }, onError: (error) {
      debugPrint("Message-error: $error");
    });
    return (messages??[]).lGroupBy((p) => p.conversationId).mGroupCount;
  }

  Future<List<Map>> queryListAll() async{
    await _dbIsOpen();
    String sql = 'SELECT * FROM Message ORDER BY time DESC';
    return db.rawQuery(sql);
  }

  Future<int> deleteByUser(String conversationId) async {
    return db.delete("Message",where: "conversationId = ?", whereArgs: [conversationId]);
  }

  Future<int> deleteAll() async {
    return db.delete("Message");
  }

  update(Map<dynamic, dynamic> message) async{
    await _dbIsOpen();
    debugPrint("Message_insert: $message");
    return db.update("Message", message,
        where: 'id = ?', whereArgs: [message['id']]);
  }

  Future<int> insert(Map message) async {
    await _dbIsOpen();
    debugPrint("Message_insert: $message");
    return db.insert("Message", message);
  }

  /// update message read state
  readMessage(String conversationId) async{
    await _dbIsOpen();
    db.update("Message", {"state": 1},
        where: "conversationId = ? AND state = 0 AND isDelete = 0",
        whereArgs: [conversationId]);
  }

  Future<int> insertOrUpdateImUser(Map imUserMap) async {
    await _dbIsOpen();
    debugPrint("imUser_insert: $imUserMap");
    if ((await queryImUserById(imUserMap['mid'])) == null)
      return db.insert("ImUser", imUserMap);
    else
      return db.update("ImUser", imUserMap,
          where: 'mid = ?', whereArgs: [imUserMap['mid']]);
  }

  Future<List<ImUser>> queryImUser(List<String> userIds) async {
    await _dbIsOpen();
    String query =
        'SELECT * FROM ImUser WHERE mid IN (${userIds.map((mid) => "'$mid'").join(',')})';
    return db.rawQuery(query).then((value) {
      return value.map((e) => ImUser.fromJson(e)).toList();
    }, onError: (error) {
      debugPrint("ImUser_error: $error");
    });
  }

  Future<ImUser> queryImUserById(String userId) async {
    await _dbIsOpen();
    List<ImUser> imUser = await db.query("ImUser",
        distinct: true, where: "mid = ?", whereArgs: [userId]).then((value) {
      return value.map((e) => ImUser.fromJson(e)).toList();
    }, onError: (error) {
      debugPrint("ImUser_error: $error");
    });
    return (imUser?.isNotEmpty ?? false) ? imUser.first : null;
  }

  final List<Migration> _migrations = [];

  addMigrations(List<Migration> migrations) {
    _migrations.addAll(migrations);
    return this;
  }

  Future<void> runMigrations(
    final Database migrationDatabase,
    final int startVersion,
    final int endVersion,
    final List<Migration> migrations,
  ) async {
    final relevantMigrations = migrations
        .where((migration) => migration.startVersion >= startVersion)
        .toList()
      ..sort(
          (first, second) => first.startVersion.compareTo(second.startVersion));

    if (relevantMigrations.isEmpty ||
        relevantMigrations.last.endVersion != endVersion) {
      throw StateError(
        'There is no migration supplied to update the database to the current version.'
        ' Aborting the migration.',
      );
    }

    for (final migration in relevantMigrations) {
      await migration.migrate(migrationDatabase);
    }
  }
}