// Currency symbols utilities.
// SEE: tools/update-coins/symbols.rs.tmpl
// @autogenerated

use std::convert::TryFrom;

use super::errors::{Error, ErrorKind};

/// Currency symbol.
#[derive(Serialize, Deserialize, PartialEq, Clone)]
pub enum Symbol {
    /// Euro
    EUR = 1,
    /// United States Dollar
    USD = 2,{{range $k, $v := .}}
    /// {{$v.Name}}
    {{$v.Symbol}} = {{$v.Num}},{{end}}
}

/// Tries to convert string to a currency `Symbol`.
impl<'a> TryFrom<&'a str> for Symbol {
    type Error = Error;

    fn try_from(name: &str) -> Result<Self, Self::Error> {
        match name {
            "EUR" => Ok(Symbol::EUR),
            "USD" => Ok(Symbol::USD),{{range $k, $v := .}}
            "{{$v.Symbol}}" => Ok(Symbol::{{$v.Symbol}}),{{end}}
            _ => Err(ErrorKind::UnknownCurrency(name.to_owned()).into()),
        }
    }
}

impl ::std::fmt::Debug for Symbol {
    fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
        let symbol = match self {
            &Symbol::EUR => "EUR",
            &Symbol::USD => "USD",{{range $k, $v := .}}
            &Symbol::{{$v.Symbol}} => "{{$v.Symbol}}",{{end}}
        };
        f.write_str(symbol)
    }
}

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

    #[test]
    fn symbol_debug() {
        let c = Symbol::try_from("BTC").unwrap();
        assert_eq!("BTC".to_owned(), format!("{:?}", c));
    }
}