use std::{collections::HashMap, time::Duration};

use crate::config::*;

// Environment variables are set for the entire process and
// tests are run whithin the same process.
// => We cannot test ConfigOpts::from_env(),
// because tests modify each other's environment.
// This is why we only test ConfigOpts::from_iter(iter).

fn minimal_valid_options() -> HashMap<String, String> {
  let mut opts = HashMap::new();
  opts.insert(
    "DIPLONAT_PRIVATE_IP".to_string(),
    "172.123.43.555".to_string(),
  );
  opts.insert(
    "DIPLONAT_CONSUL_NODE_NAME".to_string(),
    "consul_node".to_string(),
  );
  opts
}

fn all_valid_options() -> HashMap<String, String> {
  let mut opts = minimal_valid_options();
  opts.insert("DIPLONAT_EXPIRATION_TIME".to_string(), "30".to_string());
  opts.insert("DIPLONAT_REFRESH_TIME".to_string(), "10".to_string());
  opts.insert(
    "DIPLONAT_CONSUL_URL".to_string(),
    "http://127.0.0.1:9999".to_string(),
  );
  opts.insert("DIPLONAT_ACME_ENABLE".to_string(), "true".to_string());
  opts.insert(
    "DIPLONAT_ACME_EMAIL".to_string(),
    "bozo@bozo.net".to_string(),
  );
  opts
}

#[test]
#[should_panic]
fn err_empty_env() {
  std::env::remove_var("DIPLONAT_PRIVATE_IP");
  std::env::remove_var("DIPLONAT_CONSUL_NODE_NAME");
  ConfigOpts::from_env().unwrap();
}

#[test]
fn ok_from_iter_minimal_valid_options() {
  let opts = minimal_valid_options();
  let rt_config = ConfigOpts::from_iter(opts.clone()).unwrap();

  assert!(rt_config.acme.is_none());
  assert_eq!(
    &rt_config.consul.node_name,
    opts.get(&"DIPLONAT_CONSUL_NODE_NAME".to_string()).unwrap()
  );
  assert_eq!(rt_config.consul.url, CONSUL_URL.to_string());
  assert_eq!(
    rt_config.firewall.refresh_time,
    Duration::from_secs(REFRESH_TIME.into())
  );
  assert_eq!(
    &rt_config.igd.private_ip,
    opts.get(&"DIPLONAT_PRIVATE_IP".to_string()).unwrap()
  );
  assert_eq!(
    rt_config.igd.expiration_time,
    Duration::from_secs(EXPIRATION_TIME.into())
  );
  assert_eq!(
    rt_config.igd.refresh_time,
    Duration::from_secs(REFRESH_TIME.into())
  );
}

#[test]
#[should_panic]
fn err_from_iter_invalid_refresh_time() {
  let mut opts = minimal_valid_options();
  opts.insert("DIPLONAT_EXPIRATION_TIME".to_string(), "60".to_string());
  opts.insert("DIPLONAT_REFRESH_TIME".to_string(), "60".to_string());
  ConfigOpts::from_iter(opts).unwrap();
}

#[test]
fn ok_from_iter_all_valid_options() {
  let opts = all_valid_options();
  let rt_config = ConfigOpts::from_iter(opts.clone()).unwrap();

  let expiration_time = Duration::from_secs(
    opts
      .get(&"DIPLONAT_EXPIRATION_TIME".to_string())
      .unwrap()
      .parse::<u64>()
      .unwrap()
      .into(),
  );
  let refresh_time = Duration::from_secs(
    opts
      .get(&"DIPLONAT_REFRESH_TIME".to_string())
      .unwrap()
      .parse::<u64>()
      .unwrap()
      .into(),
  );

  assert!(rt_config.acme.is_some());
  assert_eq!(
    &rt_config.acme.unwrap().email,
    opts.get(&"DIPLONAT_ACME_EMAIL".to_string()).unwrap()
  );
  assert_eq!(
    &rt_config.consul.node_name,
    opts.get(&"DIPLONAT_CONSUL_NODE_NAME".to_string()).unwrap()
  );
  assert_eq!(
    &rt_config.consul.url,
    opts.get(&"DIPLONAT_CONSUL_URL".to_string()).unwrap()
  );
  assert_eq!(rt_config.firewall.refresh_time, refresh_time);
  assert_eq!(
    &rt_config.igd.private_ip,
    opts.get(&"DIPLONAT_PRIVATE_IP".to_string()).unwrap()
  );
  assert_eq!(rt_config.igd.expiration_time, expiration_time);
  assert_eq!(rt_config.igd.refresh_time, refresh_time);
}