//! §13.1 Cluster C — link helpers: `paste_wikilink`, `paste_url`.
//!
//! Exercises the synthesised page-name logic and the URL form that
//! the server returns to the editor. The actual `TextEdit` shape is
//! covered indirectly: the unit tests assert that the command exists
//! in `COMMANDS` and that the path-derivation produces the expected
//! string for both root-level and subdirectory pages.

use std::path::PathBuf;

use nuwiki_lsp::config::WikiConfig;
use nuwiki_lsp::index::page_name_from_uri;
use tower_lsp::lsp_types::Url;

#[test]
fn commands_list_advertises_link_helpers() {
    let names: Vec<&str> = nuwiki_lsp::commands::COMMANDS.to_vec();
    for name in ["nuwiki.link.pasteWikilink", "nuwiki.link.pasteUrl"] {
        assert!(names.contains(&name), "missing: {name}");
    }
}

#[test]
fn page_name_for_root_level_page() {
    let cfg = WikiConfig::from_root(PathBuf::from("/tmp/wiki"));
    let uri = Url::from_file_path("/tmp/wiki/Home.wiki").unwrap();
    assert_eq!(page_name_from_uri(&uri, Some(&cfg.root)), "Home");
}

#[test]
fn page_name_for_subdir_page() {
    let cfg = WikiConfig::from_root(PathBuf::from("/tmp/wiki"));
    let uri = Url::from_file_path("/tmp/wiki/diary/2026-05-11.wiki").unwrap();
    assert_eq!(
        page_name_from_uri(&uri, Some(&cfg.root)),
        "diary/2026-05-11"
    );
}

#[test]
fn paste_url_format_matches_export_output_path_for() {
    // The URL the `pasteUrl` handler emits is `<name>.html`, where
    // `<name>` walks path segments. Mirror that derivation and assert
    // the shape we'd insert at cursor.
    let name = "diary/2026-05-11";
    let mut url = String::new();
    for (i, seg) in name.split('/').enumerate() {
        if i > 0 {
            url.push('/');
        }
        url.push_str(seg);
    }
    url.push_str(".html");
    assert_eq!(url, "diary/2026-05-11.html");
}

#[test]
fn paste_wikilink_shape_for_root_page() {
    // `[[<name>]]` is what the handler inserts at the cursor.
    let name = "Notes";
    assert_eq!(format!("[[{name}]]"), "[[Notes]]");
}