pub fn ensure_main_window(window: &tauri::WebviewWindow) -> Result<(), String> {
    ensure_main_window_label(window.label())
}

pub fn ensure_main_window_label(label: &str) -> Result<(), String> {
    if label == "main" {
        Ok(())
    } else {
        Err(format!(
            "This command is only available from the main window (got {label})."
        ))
    }
}

#[cfg(test)]
mod tests {
    use super::ensure_main_window_label;

    #[test]
    fn accepts_main_window() {
        assert!(ensure_main_window_label("main").is_ok());
    }

    #[test]
    fn rejects_secondary_windows() {
        for label in ["tasks-float", "transcript-viewer", "transcription-preview"] {
            assert!(ensure_main_window_label(label).is_err());
        }
    }
}