import { getDb } from '../db/connection.js';
import { ulid } from 'ulid';

export function listNotes(recipeId: string, userId?: string) {
  const db = getDb();
  
  if (!userId) {
    // Legacy: return all notes without user filtering
    return db.prepare('SELECT * FROM notes WHERE recipe_id = ? AND user_id IS NULL ORDER BY created_at DESC').all(recipeId);
  }
  
  // Return only user's notes
  return db.prepare('SELECT * FROM notes WHERE recipe_id = ? AND user_id = ? ORDER BY created_at DESC').all(recipeId, userId);
}

export function createNote(recipeId: string, content: string, userId?: string) {
  const db = getDb();
  const recipe = db.prepare('SELECT id FROM recipes WHERE id = ?').get(recipeId);
  if (!recipe) return null;
  
  const id = ulid();
  db.prepare('INSERT INTO notes (id, recipe_id, content, user_id) VALUES (?, ?, ?, ?)').run(id, recipeId, content, userId || null);
  return db.prepare('SELECT * FROM notes WHERE id = ?').get(id);
}

export function updateNote(id: string, content: string, userId?: string) {
  const db = getDb();
  
  let query: string;
  let params: any[];
  
  if (!userId) {
    // Legacy: update notes without user filtering
    query = 'UPDATE notes SET content = ? WHERE id = ? AND user_id IS NULL';
    params = [content, id];
  } else {
    // Update only if note belongs to user
    query = 'UPDATE notes SET content = ? WHERE id = ? AND user_id = ?';
    params = [content, id, userId];
  }
  
  const result = db.prepare(query).run(...params);
  if (result.changes === 0) return null;
  return db.prepare('SELECT * FROM notes WHERE id = ?').get(id);
}

export function deleteNote(id: string, userId?: string): boolean {
  const db = getDb();
  
  let query: string;
  let params: any[];
  
  if (!userId) {
    // Legacy: delete notes without user filtering
    query = 'DELETE FROM notes WHERE id = ? AND user_id IS NULL';
    params = [id];
  } else {
    // Delete only if note belongs to user
    query = 'DELETE FROM notes WHERE id = ? AND user_id = ?';
    params = [id, userId];
  }
  
  return db.prepare(query).run(...params).changes > 0;
}