use crate::*;

// -----------------------------------------------------------------------------

#[tracable_parser]
pub(crate) fn package_item(s: Span) -> IResult<Span, PackageItem> {
    alt((
        map(package_or_generate_item_declaration, |x| {
            PackageItem::PackageOrGenerateItemDeclaration(Box::new(x))
        }),
        map(anonymous_program, |x| {
            PackageItem::AnonymousProgram(Box::new(x))
        }),
        map(package_export_declaration, |x| {
            PackageItem::PackageExportDeclaration(Box::new(x))
        }),
        map(timeunits_declaration, |x| {
            PackageItem::TimeunitsDeclaration(Box::new(x))
        }),
    ))(s)
}

#[tracable_parser]
pub(crate) fn package_or_generate_item_declaration(
    s: Span,
) -> IResult<Span, PackageOrGenerateItemDeclaration> {
    alt((
        map(net_declaration, |x| {
            PackageOrGenerateItemDeclaration::NetDeclaration(Box::new(x))
        }),
        map(data_declaration, |x| {
            PackageOrGenerateItemDeclaration::DataDeclaration(Box::new(x))
        }),
        map(task_declaration, |x| {
            PackageOrGenerateItemDeclaration::TaskDeclaration(Box::new(x))
        }),
        map(function_declaration, |x| {
            PackageOrGenerateItemDeclaration::FunctionDeclaration(Box::new(x))
        }),
        map(checker_declaration, |x| {
            PackageOrGenerateItemDeclaration::CheckerDeclaration(Box::new(x))
        }),
        map(dpi_import_export, |x| {
            PackageOrGenerateItemDeclaration::DpiImportExport(Box::new(x))
        }),
        map(extern_constraint_declaration, |x| {
            PackageOrGenerateItemDeclaration::ExternConstraintDeclaration(Box::new(x))
        }),
        map(class_declaration, |x| {
            PackageOrGenerateItemDeclaration::ClassDeclaration(Box::new(x))
        }),
        map(class_constructor_declaration, |x| {
            PackageOrGenerateItemDeclaration::ClassConstructorDeclaration(Box::new(x))
        }),
        map(pair(local_parameter_declaration, symbol(";")), |x| {
            PackageOrGenerateItemDeclaration::LocalParameterDeclaration(Box::new(x))
        }),
        map(pair(parameter_declaration, symbol(";")), |x| {
            PackageOrGenerateItemDeclaration::ParameterDeclaration(Box::new(x))
        }),
        map(covergroup_declaration, |x| {
            PackageOrGenerateItemDeclaration::CovergroupDeclaration(Box::new(x))
        }),
        map(assertion_item_declaration, |x| {
            PackageOrGenerateItemDeclaration::AssertionItemDeclaration(Box::new(x))
        }),
        map(symbol(";"), |x| {
            PackageOrGenerateItemDeclaration::Empty(Box::new(x))
        }),
    ))(s)
}

#[tracable_parser]
pub(crate) fn anonymous_program(s: Span) -> IResult<Span, AnonymousProgram> {
    let (s, a) = keyword("program")(s)?;
    let (s, b) = symbol(";")(s)?;
    let (s, c) = many0(anonymous_program_item)(s)?;
    let (s, d) = keyword("endprogram")(s)?;
    Ok((
        s,
        AnonymousProgram {
            nodes: (a, b, c, d),
        },
    ))
}

#[tracable_parser]
pub(crate) fn anonymous_program_item(s: Span) -> IResult<Span, AnonymousProgramItem> {
    alt((
        map(task_declaration, |x| {
            AnonymousProgramItem::TaskDeclaration(Box::new(x))
        }),
        map(function_declaration, |x| {
            AnonymousProgramItem::FunctionDeclaration(Box::new(x))
        }),
        map(class_declaration, |x| {
            AnonymousProgramItem::ClassDeclaration(Box::new(x))
        }),
        map(covergroup_declaration, |x| {
            AnonymousProgramItem::CovergroupDeclaration(Box::new(x))
        }),
        map(class_constructor_declaration, |x| {
            AnonymousProgramItem::ClassConstructorDeclaration(Box::new(x))
        }),
        map(symbol(";"), |x| AnonymousProgramItem::Empty(Box::new(x))),
    ))(s)
}