module.exports = async (params) => {
    const { app } = params;
    const activeFile = app.workspace.getActiveFile();
    if (!activeFile) return;

    const cache = app.metadataCache.getFileCache(activeFile);
    const fm = cache?.frontmatter;

    if (!fm || !fm.title) {
        new Notice("No changes made, title property not set");
        return;
    }

    // 1. Get the Date components
    const createdDate = fm.created?.split('T')[0]; // e.g. 2026-01-06
    const eventDate = fm.date || createdDate || moment().format("YYYY-MM-DD");

    // 2. Logic: Should we use actual time or 0000?
    let timePart = "";

    // If the event is happening today, use the actual created time
    if (eventDate === createdDate) {
        if (fm.created && fm.created.includes('T')) {
            timePart = fm.created.split('T')[1].replace(/:/g, '').substring(0, 4);
        } else {
            new Notice("Error: 'created' property is missing or incorrect format");
            return;
        }
    }

    // 3. Construct filename
    let newName = "";
    if (timePart.length === 0) {
        newName = `${eventDate} ${fm.title}`;
    }
    else {
        newName = `${eventDate} ${timePart} ${fm.title}`;
    }
    const newPath = `${activeFile.parent.path}/${newName}.md`;

    // 4. Rename
    if (activeFile.name !== `${newName}.md`) {
        await app.fileManager.renameFile(activeFile, newPath);
        new Notice(`Renamed: ${newName}`);
    } else {
        new Notice("Filename already matches.");
    }
};