import { readFile } from 'node:fs/promises';
import { join } from 'node:path';
import { readModuleManifest } from '../../module/import';
import type { Check } from './types';

/**
 * Runs the same manifest pipeline `module import` runs (zod schema +
 * zone + derive + hook + cross-cap + capability-name + variable-source
 * checks). Reports a single Check: ok if everything passes, fail with
 * the first error message otherwise.
 *
 * One row instead of N because a broken manifest cascades — fix the
 * first thing and the next run will surface the next thing. Surfacing
 * every individual sub-validator would just spam the report.
 */
export async function checkManifestSchema(modulePath: string): Promise<Check> {
  const result = await readModuleManifest(modulePath);
  if (result.success) {
    return {
      category: 'manifest_schema',
      name: 'manifest.yml',
      status: 'ok',
      message: 'manifest passes all schema validations',
    };
  }
  return {
    category: 'manifest_schema',
    name: 'manifest.yml',
    status: 'fail',
    message: result.error,
  };
}

/**
 * Reads `manifest.yml` from the given module path as raw YAML. Used by
 * checkers that want the manifest's claimed values without paying the
 * full validation cost (e.g. capability-version drift, where a malformed
 * manifest is already failed by checkManifestSchema).
 */
export async function readManifestYaml(modulePath: string): Promise<string> {
  return readFile(join(modulePath, 'manifest.yml'), 'utf-8');
}