// (catalog_name, (username, password))
pub type CatalogDefinition<'a> = (&'a str, Login<'a>);
pub type Login<'a> = Option<(&'a str, &'a str)>;

#[cfg_attr(rustfmt, rustfmt_skip)]
pub static ALIASES: &[(&str, CatalogDefinition)] = &[
    ("DS_WS1617", ("16w-diskrete-strukturen", None)),
    ("EIDI_WS1617", ("eidi1-2016", Some(("eidi-2016", "PGdP.16")))),
    ("ERA_WS1617", ("era-2016", None)),

    ("GAD_SS17", ("17s-grundlagen-algorithmen-und-datenstrukturen", None)),
    ("LA_SS17", ("17s-lineare-algebra-fuer-informatik", None)),
    // EIST is on a Nextcloud
];

pub static ALIAS_ALIASES: &[(&str, &str)] = &[
    ("DS", "DS_WS1617"),
    ("EIDI", "EIDI_WS1617"),
    ("ERA", "ERA_WS1617"),

    ("GAD", "GAD_SS17"),
    ("LA", "LA_SS17"),
];

pub fn resolve_alias(mut query: &str) -> Option<CatalogDefinition> {
    for &(alias_alias, alias) in ALIAS_ALIASES {
        if query == alias_alias {
            query = alias;
        }
    }

    for &(alias_name, def) in ALIASES {
        if query == alias_name {
            return Some(def);
        }
    }

    None
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn check_alias_aliases() {
        for &(alias, _) in ALIAS_ALIASES {
            assert!(resolve_alias(alias).is_some());
        }
    }
}