PlaguBot/src/main/kotlin/dev/inmo/plagubot/config/DatabaseConfig.kt

package dev.inmo.plagubot.config

import kotlinx.serialization.Serializable
import kotlinx.serialization.Transient
import org.jetbrains.exposed.sql.Database
import org.jetbrains.exposed.sql.transactions.transactionManager
import org.sqlite.JDBC
import java.sql.Connection

@Serializable
data class DatabaseConfig(
    val url: String,
    val driver: String = JDBC::class.qualifiedName!!,
    val username: String = "",
    val password: String = "",
    val initAutomatically: Boolean = true
) {
    @Transient
    private lateinit var _database: Database
    val database: Database
        get() = try {
            _database
        } catch (e: UninitializedPropertyAccessException) {
            Database.connect(
                url,
                driver,
                username,
                password
            ).also {
                _database = it
                it.transactionManager.defaultIsolationLevel = Connection.TRANSACTION_SERIALIZABLE // Or Connection.TRANSACTION_READ_UNCOMMITTED
            }
        }

    init {
        if (initAutomatically) {
            database // init database
        }
    }

    @Deprecated(
        "Deprecated due to the replacement by lateinit database field with the same functionality",
        ReplaceWith("database")
    )
    fun connect(): Database {
        return database
    }
}