import { ScrapbookItemConfig } from './ScrapbookPreset';
import { ScrapbookPresetType } from './ScrapbookPreset';

type PresetGenerator = () => ScrapbookItemConfig[];

// Internal map of preset name to generator
const presetRegistry = new Map<string, PresetGenerator>();

/**
 * Register a new scrapbook preset under the given name.
 */
export function registerPreset(name: string, gen: PresetGenerator) {
    presetRegistry.set(name, gen);
}

/**
 * List all registered preset names.
 */
export function getPresetNames(): string[] {
    return Array.from(presetRegistry.keys());
}

/**
 * Create the config array for the named preset.
 */
export function createPreset(name: string): ScrapbookItemConfig[] {
    const gen = presetRegistry.get(name);
    if (!gen) throw new Error(`Unknown scrapbook preset: ${name}`);
    return gen();
}

// ------------------------
// Register built-in presets
import { ScrapbookPreset } from './ScrapbookPreset';

Object.keys(ScrapbookPresetType).forEach(key => registerPreset(key, () => ScrapbookPreset.createPreset(key as ScrapbookPresetType))); // pretter-ignore