package com.example.shiftalarm

import android.content.Context
import androidx.room.*

@Database(entities = [ShiftOverride::class, DailyMemo::class, CustomAlarm::class], version = 3, exportSchema = false)
abstract class AppDatabase : RoomDatabase() {
    abstract fun shiftDao(): ShiftDao

    companion object {
        @Volatile
        private var INSTANCE: AppDatabase? = null

        fun getDatabase(context: Context): AppDatabase {
            return INSTANCE ?: synchronized(this) {
                val instance = Room.databaseBuilder(
                    context.applicationContext,
                    AppDatabase::class.java,
                    "shift_database"
                )
                .fallbackToDestructiveMigration() // Simple for now
                .build()
                INSTANCE = instance
                instance
            }
        }
    }
}
