WeatherTool/src/main/scala/server/Main.scala

package server
import cats.effect._
import cats.implicits.catsSyntaxTuple2Parallel
import db.DBService
import fetch.{FetchService, FileNameService}

object Main extends IOApp {
  def run(args: List[String]): IO[ExitCode] = {
    // TODO looks like fetchTask fails server if no csv on meteo server
    val fetchTask = FileNameService.generateCurrentHour.flatMap(FetchService.fetchSingleFile)
    val scheduler = Scheduler.scheduleTask(fetchTask)
      .evalMap { case (name, content) =>
        IO(println(s"fetched: $name")) *>
          DBService.save(name, content).attempt.flatMap {
            case Right(savedName) => IO(println(s"File saved: $savedName"))
            case Left(err) => IO(println(s"Error: $err"))
          }
      }.compile.drain // Convert Stream[IO, Unit] to IO[Unit]

    val server = Server.run // This is an IO[Server]

    (server, scheduler).parMapN((_, _) => ExitCode.Success)
  }
}