use renamr_core::format::ExpressionFormat;
use renamr_core::string_bindings;
use std::collections::HashMap;

/// Renders a naming-scheme expression against a set of binding values.
/// This is the Tauri-facing entry point into the core format engine, used by the
/// rename-preview panel in the UI so users see live results as they edit a pattern.
#[tauri::command]
fn render_expression(expression: String, bindings: HashMap<String, String>) -> Result<String, String> {
    let compiled = ExpressionFormat::compile(&expression).map_err(|e| e.to_string())?;
    compiled
        .format(&string_bindings(bindings))
        .map_err(|e| e.to_string())
}

#[cfg_attr(mobile, tauri::mobile_entry_point)]
pub fn run() {
    tauri::Builder::default()
        .invoke_handler(tauri::generate_handler![render_expression])
        .run(tauri::generate_context!())
        .expect("error while running Renamr");
}