mod common;

use kfl::Decode;

#[test]
fn decode_unit() {
    #[derive(Debug, Decode, PartialEq)]
    struct Node;
    assert_decode!(r#"node"#, Node);
    assert_decode_error!(
        Node,
        r#"node something="world""#,
        "unexpected property `something`"
    );
}

#[test]
fn decode_argument() {
    #[derive(Debug, Decode, PartialEq)]
    struct Node(#[kfl(argument)] u32);
    assert_decode!(r#"node 123"#, Node(123));
    assert_decode_error!(
        Node,
        r#"node something="world""#,
        "additional argument is required"
    );
}

#[test]
fn decode_option_argument() {
    #[derive(Debug, Decode, PartialEq)]
    struct Node(#[kfl(argument, default)] Option<u32>);
    assert_decode!(r#"node 123"#, Node(Some(123)));
    assert_decode!(r#"node"#, Node(None));
    assert_decode_error!(
        Node,
        r#"node something="world""#,
        "unexpected property `something`"
    );
}

#[test]
fn decode_extra() {
    #[derive(Debug, Decode, PartialEq)]
    struct Node(#[kfl(argument, default)] Option<String>, u32);
    assert_decode!(r#"node "123""#, Node(Some("123".into()), 0));
    assert_decode!(r#"node"#, Node(None, 0));
    assert_decode_error!(Node, r#"node "123" 456"#, "unexpected argument");
}

#[test]
fn decode_enum() {
    #[derive(Debug, Decode, PartialEq)]
    enum Enum {
        Unit,
        Arg(#[kfl(argument)] u32),
        // Opt(Option<Arg>),
        Extra(#[kfl(argument, default)] Option<String>, u32),
    }
    assert_decode!(r#"unit"#, Enum::Unit);
    assert_decode!(r#"arg 123"#, Enum::Arg(123));
    // assert_decode!(r#"opt 123"#, Enum::Opt(Some(Arg(123))));
    // assert_decode!(r#"opt"#, Enum::Opt(None));
    assert_decode!(r#"extra"#, Enum::Extra(None, 0));
    assert_decode_error!(
        Enum,
        r#"unit something="world""#,
        "unexpected property `something`"
    );
    assert_decode_error!(
        Enum,
        r#"other something="world""#,
        "expected one of `unit`, `arg`, `extra`"
    );
    assert_decode_error!(Enum, r#"extra "hello" "world""#, "unexpected argument");
}