// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at http://mozilla.org/MPL/2.0/.
//
// Copyright (c) 2024, Olof Kraigher olof.kraigher@gmail.com
use crate::analysis::DesignRoot;
use crate::CompletionItem;
use std::iter::once;

/// Produces all available libraries.
pub(crate) fn list_all_libraries(root: &DesignRoot) -> Vec<CompletionItem<'_>> {
    root.libraries()
        .map(|lib| CompletionItem::Simple(root.get_ent(lib.id())))
        .chain(once(CompletionItem::Work))
        .collect()
}

#[cfg(test)]
mod tests {
    use crate::analysis::tests::{Code, LibraryBuilder};
    use crate::syntax::test::assert_eq_unordered;
    use crate::{list_completion_options, CompletionItem};

    #[test]
    pub fn completing_libraries() {
        let input = LibraryBuilder::new();
        let code = Code::new("library ");
        let (root, _) = input.get_analyzed_root();
        let cursor = code.end();
        let options = list_completion_options(&root, code.source(), cursor);
        assert_eq_unordered(
            &options,
            &[
                CompletionItem::Simple(
                    root.get_ent(root.get_lib(&root.symbol_utf8("std")).unwrap().id()),
                ),
                CompletionItem::Work,
            ],
        )
    }
}