package be.simplenotes.config

import java.util.*
import java.util.concurrent.TimeUnit

class ConfigLoader {
    //region Config loading
    private val properties: Properties = javaClass
        .getResource("/application.properties")
        .openStream()
        .use {
            Properties().apply { load(it) }
        }

    private val env = System.getenv()

    private fun value(key: String): String =
        env[key.toUpperCase().replace(".", "_")]
            ?: properties.getProperty(key)
            ?: error("Missing config key $key")
    //endregion

    val jwtConfig
        get() = JwtConfig(
            secret = value("jwt.secret"),
            validity = value("jwt.validity").toLong(),
            timeUnit = TimeUnit.HOURS,
        )

    val dataSourceConfig
        get() = DataSourceConfig(
            jdbcUrl = value("jdbcUrl"),
            driverClassName = value("driverClassName"),
            username = value("username"),
            password = value("password"),
            maximumPoolSize = value("maximumPoolSize").toInt(),
            connectionTimeout = value("connectionTimeout").toLong()
        )

    val serverConfig
        get() = ServerConfig(
            host = value("host"),
            port = value("port").toInt(),
        )
}