package dao

import de.mkammerer.argon2.Argon2Factory
import execution.CryptoExecutionContext
import jakarta.inject.Inject
import play.api.db.slick.{DatabaseConfigProvider, HasDatabaseConfigProvider}
import slick.jdbc.PostgresProfile
import slick.jdbc.PostgresProfile.api.*

import scala.concurrent.{ExecutionContext, Future}
import models.User
import schemas.Users

class UsersDAO @Inject()(protected val dbConfigProvider: DatabaseConfigProvider, private val cryptoEC: CryptoExecutionContext)(implicit val ec: ExecutionContext)
  extends HasDatabaseConfigProvider[PostgresProfile] {
  private val argon2 = Argon2Factory.create()

  def authenticate(username: String, password: String): Future[Option[User]] = {
    val query = Users.filter(_.username === username).take(1).result.headOption

    val userFuture = db.run(query)

    userFuture.map { userOption =>
      for {
        user <- userOption
        digest <- user.passwordDigest
        if argon2.verify(digest, password.getBytes("UTF-8"))
      } yield user
    }(using cryptoEC)
  }
}