import fs from "node:fs";

const overrides = JSON.parse(fs.readFileSync(new URL("../resources/catalog-overrides.json", import.meta.url), "utf8"));

/** 把本项目已实现的参数契约覆盖到派生目录，避免重新生成时恢复旧的错误元数据。 */
export function applyCatalogOverrides(catalog) {
  for (const component of catalog.components) {
    const override = overrides[component.id];
    if (!override) continue;
    const { fields = {}, addFields = [], removeFields = [], ...metadata } = override;
    Object.assign(component, metadata);
    component.fields = component.fields.filter(field => !removeFields.includes(field.key))
      .map(field => ({ ...field, ...fields[field.key] }));
    // addFields：补源数据里缺失、但实现确实读取的字段（完整字段定义，key 重复则跳过）
    if (addFields.length) {
      const have = new Set(component.fields.map(f => f.key));
      for (const f of addFields) {
        if (f && f.key && !have.has(f.key)) component.fields.push(f);
      }
    }
  }
  catalog.counts.fields = catalog.components.reduce((count, component) => count + component.fields.length, 0);
  return catalog;
}