// Copyright 2023-2024 Shin Yoshida
//
// "GPL-3.0-only"
//
// This is part of BSN1_SERDE
//
// BSN1_SERDE is free software: you can redistribute it and/or modify it under the terms of the
// GNU General Public License as published by the Free Software Foundation, version 3.
//
// BSN1_SERDE is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
// even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with this program. If
// not, see <https://www.gnu.org/licenses/>.

use bsn1_serde::ser::Serialize as _;
use bsn1_serde::to_der;

#[derive(bsn1_serde::Serialize, Clone)]
#[bsn1_serde(into = "i32")]
enum X {
    A { inner: i32 },
    B { inner: i32, _dummy: i8 },
    C(i32),
    D(i8, i32),
}

impl Into<i32> for X {
    fn into(self) -> i32 {
        match self {
            X::A { inner } => inner,
            X::B { inner, .. } => inner,
            X::C(inner, ..) => inner,
            X::D(_, inner) => inner,
        }
    }
}

fn main() {
    test_xa();
    test_xb();
    test_xc();
    test_xd();
}

fn test_xa() {
    let inner = 5;
    let val = X::A { inner };

    let der = to_der(&val).unwrap();
    assert_eq!(der, to_der(&inner).unwrap());
    assert!(val.id_len().unwrap().is_none());
    assert!(val.der_contents_len().unwrap().is_none());
}

fn test_xb() {
    let inner = 5;
    let val = X::B { _dummy: -2, inner };

    let der = to_der(&val).unwrap();
    assert_eq!(der, to_der(&inner).unwrap());
    assert!(val.id_len().unwrap().is_none());
    assert!(val.der_contents_len().unwrap().is_none());
}

fn test_xc() {
    let inner = 5;
    let val = X::C(inner);

    let der = to_der(&val).unwrap();
    assert_eq!(der, to_der(&inner).unwrap());
    assert!(val.id_len().unwrap().is_none());
    assert!(val.der_contents_len().unwrap().is_none());
}

fn test_xd() {
    let inner = 5;
    let val = X::D(-2, inner);

    let der = to_der(&val).unwrap();
    assert_eq!(der, to_der(&inner).unwrap());
    assert!(val.id_len().unwrap().is_none());
    assert!(val.der_contents_len().unwrap().is_none());
}