/**
 * Shared field normalization for custom card designs.
 * Single source of truth so the create and update routes never drift.
 */

export function pickDesignFields(body = {}) {
  const str = (v) => (typeof v === 'string' ? v.trim() : null);
  const int = (v) => {
    const n = parseInt(v, 10);
    return Number.isInteger(n) ? n : null;
  };

  const artMode = str(body.art_mode) || str(body.artMode) || 'framed';
  const gameTarget = str(body.game_target) || str(body.gameTarget) || 'custom';

  return {
    name: str(body.name),
    manaCost: str(body.mana_cost) || str(body.manaCost),
    cardType: str(body.card_type) || str(body.cardType),
    rarity: str(body.rarity),
    rulesText: str(body.rules_text) || str(body.description),
    actions: str(body.actions),
    flavorQuote: str(body.flavor_quote) || str(body.flavorQuote),
    power: str(body.power),
    toughness: str(body.toughness),
    frameId: str(body.frame_id) || str(body.frameId) || 'classic',
    artworkUrl: str(body.artwork_url) || str(body.artworkUrl),
    artMode: artMode === 'fullart' ? 'fullart' : 'framed',
    gameTarget,
    customGameId: int(body.custom_game_id) || int(body.customGameId),
  };
}