package com.drivergrp.core

import com.drivergrp.core.time.Time

import scala.concurrent.Future
import slick.backend.DatabaseConfig
import slick.driver.JdbcProfile

object database {

  trait Database {
    val profile: JdbcProfile
    val database: JdbcProfile#Backend#Database
  }

  object Database {

    def fromConfig(databaseName: String): Database = {
      val dbConfig: DatabaseConfig[JdbcProfile] = DatabaseConfig.forConfig(databaseName)

      new Database {
        val profile: JdbcProfile                   = dbConfig.driver
        val database: JdbcProfile#Backend#Database = dbConfig.db
      }
    }
  }

  trait IdColumnTypes {
    val database: Database

    import database.profile.api._

    implicit def idColumnType[T] =
      MappedColumnType.base[Id[T], Long](id => id: Long, Id[T](_))

    implicit def nameColumnType[T] =
      MappedColumnType.base[Name[T], String](name => name: String, Name[T](_))

    implicit val timeColumnType = MappedColumnType.base[Time, Long](time => time.millis, Time(_))
  }

  trait DatabaseObject extends IdColumnTypes {

    def createTables(): Future[Unit]
    def disconnect(): Unit
  }

  abstract class DatabaseObjectAdapter extends DatabaseObject {
    def createTables(): Future[Unit] = Future.successful(())
    def disconnect(): Unit           = {}
  }
}