src/lib/db/index.ts

import Dexie, { type Table } from 'dexie';
import type { Monster } from './schema';

export class MonsterDatabase extends Dexie {
  monsters!: Table<Monster>;

  constructor() {
    super('MonsterGeneratorDB');
    
    this.version(1).stores({
      monsters: '++id, name, createdAt'
    });
    
    // Version 2: Add imageData field
    this.version(2).stores({
      monsters: '++id, name, createdAt'
    }).upgrade(tx => {
      // No data migration needed, just schema update
      return tx.table('monsters').toCollection().modify(monster => {
        monster.imageData = monster.imageData || null;
      });
    });
    
    // Version 3: Add stats field
    this.version(3).stores({
      monsters: '++id, name, createdAt'
    }).upgrade(tx => {
      // No data migration needed, just schema update
      return tx.table('monsters').toCollection().modify(monster => {
        monster.stats = monster.stats || null;
      });
    });
  }
}

export const db = new MonsterDatabase();