use tauri::State;

use crate::db::connection::DbManager;
use crate::domains::sync::service;
use crate::error::AppError;
use crate::shared::session::SessionState;
use crate::shared::types::Lang;

fn get_session(session: &State<SessionState>) -> Result<(String, Lang), AppError> {
    let session_guard = session.lock().map_err(|e| AppError::Internal(format!("Session lock failed: {}", e)))?;
    let user_id = session_guard.get_user_id().map_err(|e| AppError::Auth(e))?.to_string();
    let lang = session_guard.lang;
    Ok((user_id, lang))
}

#[tauri::command]
pub fn get_synced_series(db: State<DbManager>, session: State<SessionState>) -> Result<Vec<crate::domains::book::service::SyncedSeries>, AppError> {
    let (user_id, lang) = get_session(&session)?;
    let db_manager = db.lock().map_err(|e| AppError::Internal(format!("DB lock failed: {}", e)))?;
    let conn = db_manager.get_connection(&user_id)?;
    service::get_synced_series(conn, &user_id, lang)
}
