med-det-samme/app/src/main/java/no/naiv/meddetsamme/data/MedDatabase.kt

package no.naiv.meddetsamme.data

import android.content.Context
import androidx.room.Database
import androidx.room.Room
import androidx.room.RoomDatabase

/**
 * exportSchema=true with schemas/ committed: this DB holds a medical record,
 * so every future schema change ships as a tested Migration against the
 * exported baseline — never destructive fallback.
 *
 * Enums are stored as TEXT (Room's built-in enum converter); all other columns
 * are primitives, so no TypeConverters are needed yet.
 */
@Database(
    entities = [Medication::class, DoseTime::class, DoseLog::class],
    version = 1,
    exportSchema = true,
)
abstract class MedDatabase : RoomDatabase() {
    abstract fun medicationDao(): MedicationDao
    abstract fun doseTimeDao(): DoseTimeDao
    abstract fun doseLogDao(): DoseLogDao
    abstract fun backupDao(): BackupDao

    suspend fun restoreAll(
        meds: List<Medication>,
        doseTimes: List<DoseTime>,
        logs: List<DoseLog>,
    ) = backupDao().replaceAll(meds, doseTimes, logs)

    companion object {
        @Volatile private var instance: MedDatabase? = null

        fun get(context: Context): MedDatabase =
            instance ?: synchronized(this) {
                instance ?: Room.databaseBuilder(
                    context.applicationContext,
                    MedDatabase::class.java,
                    "med-det-samme.db",
                ).build().also { instance = it }
            }
    }
}