import { ScoringRules } from '../config/ScoringConfig.js';

/**
 * RuleMerger ensures that we apply sector-specific overrides
 * to base asset rules without polluting the individual Asset or Scorer logic.
 */
export const RuleMerger = {
  getRulesForAsset(type, metrics) {
    // 1. Start with a deep clone of the base rules for this asset type (STOCK, ETF, etc.)
    const baseRules = ScoringRules[type];
    if (!baseRules) throw new Error(`No configuration found for type: ${type}`);

    let finalRules = JSON.parse(JSON.stringify(baseRules));

    // 2. If it's a stock and we have a sector, merge the overrides
    if (type === 'STOCK' && metrics.sector) {
      const sectorKey = metrics.sector.toUpperCase();
      const overrides = baseRules.SECTOR_OVERRIDE?.[sectorKey];

      if (overrides) {
        // Merge gates, weights, and thresholds deeply
        finalRules.gates = { ...finalRules.gates, ...overrides.gates };
        finalRules.weights = { ...finalRules.weights, ...overrides.weights };
        finalRules.thresholds = {
          ...finalRules.thresholds,
          ...overrides.thresholds,
        };
      }
    }

    // 3. Cleanup: Remove the override configuration from the final object
    // so the Scorer works with a clean, flat rule set.
    delete finalRules.SECTOR_OVERRIDE;

    return finalRules;
  },
};