import config
import gleam/erlang/process
import gleam/io
import mqtt_dummy

pub fn main() -> Nil {
  case config.load_config() {
    Ok(cfg) -> {
      io.println("Config loaded successfully!")
      io.println("MQTT Host: " <> cfg.mqtt_host)
      io.println("MQTT User: " <> cfg.mqtt_user)
      io.println("MQTT PW: " <> cfg.mqtt_pw)
      io.println("JWT Key: " <> cfg.jwt_key)
    }
    Error(err) -> {
      io.println("Failed to load config: " <> err)
    }
  }

  let assert Ok(subject) = mqtt_dummy.start()
  let mailbox = mqtt_dummy.subscribe(subject)

  // Kick off the first message
  process.send_after(subject, 1000, mqtt_dummy.Proc)

  receive_and_reschedule(mailbox, subject)
  // case process.receive(mailbox, 5000) {
  //   Ok(msg) -> {
  //     io.println("Got message:" <> msg)
  //     // process_messages(mailbox, n - 1)
  //   }
  //   Error(Nil) -> {
  //     io.println("Timeout waiting for message")
  //   }
  // }
  Nil
}

fn receive_and_reschedule(
  mailbox: process.Subject(String),
  subject: process.Subject(mqtt_dummy.Message),
) -> Nil {
  case process.receive(mailbox, 2000) {
    Ok(msg) -> {
      io.println("Got message: " <> msg)
      // Reschedule the next Proc message
      process.send_after(subject, 1000, mqtt_dummy.Proc)
      receive_and_reschedule(mailbox, subject)
    }
    Error(Nil) -> {
      io.println("Timeout - waiting again...")
      receive_and_reschedule(mailbox, subject)
    }
  }
}