package chats.data.local.dao

import androidx.room.*
import chats.data.local.database.ChatEntity
import kotlinx.coroutines.flow.Flow

/**
 * DAO для операций с чатами в Room Database
 */
@Dao
interface ChatDao {

    @Query("SELECT * FROM chats ORDER BY lastMessageTimestamp DESC")
    fun getAllChats(): Flow<List<ChatEntity>>

    @Query("SELECT * FROM chats WHERE remoteId = :remoteId LIMIT 1")
    suspend fun getChatByRemoteId(remoteId: String): ChatEntity?

    @Query("SELECT * FROM chats WHERE localId = :localId LIMIT 1")
    suspend fun getChatByLocalId(localId: String): ChatEntity?

    @Insert(onConflict = OnConflictStrategy.REPLACE)
    suspend fun insertChat(chat: ChatEntity)

    @Insert(onConflict = OnConflictStrategy.REPLACE)
    suspend fun insertChats(chats: List<ChatEntity>)

    @Update
    suspend fun updateChat(chat: ChatEntity)

    @Query("UPDATE chats SET lastMessageText = :lastMessageText, lastMessageTimestamp = :timestamp WHERE remoteId = :chatId")
    suspend fun updateLastMessage(chatId: String, lastMessageText: String?, timestamp: Long?)

    @Query("UPDATE chats SET unreadCount = :count WHERE remoteId = :chatId")
    suspend fun updateUnreadCount(chatId: String, count: Int)

    @Delete
    suspend fun deleteChat(chat: ChatEntity)

    @Query("DELETE FROM chats WHERE remoteId = :remoteId")
    suspend fun deleteChatByRemoteId(remoteId: String)

    @Query("DELETE FROM chats")
    suspend fun deleteAllChats()
}