import * as fs from 'fs';
import * as path from 'path';
import Draft07Schema from '../../v1/Draft-07.json';
import UserApiManifestV1 from './UserApiManifestV1.json';
import { JSONSchemaService } from '../../../JsonSchemaService';
import { TypeResolverBuilder } from '../../../jsonTypeResolution/TypeResolverBuilder';

const pkgVersion = ((): string | undefined => {
  try {
    const pkgPath = path.join(__dirname, '..', '..', '..', '..', 'package.json');
    const raw = fs.readFileSync(pkgPath, 'utf8');
    return (JSON.parse(raw) as { version?: string }).version;
  } catch {
    return undefined;
  }
})();

const draft07Remotes = {
  'http://json-schema.org/draft-07/schema': Draft07Schema,
  'http://json-schema.org/draft-07/schema#': Draft07Schema,
} as const;

const fullManifestMetaSchema = {
  root: UserApiManifestV1,
  remotes: draft07Remotes,
} as const;

const resolver = TypeResolverBuilder.new().build();

const fullManifestValidator = new JSONSchemaService(resolver, fullManifestMetaSchema);

/**
 * Recommended `$schema` URL for the top-level DXP User API `manifest.json`.
 *
 * Published at {@link USER_API_FULL_MANIFEST_SCHEMA} under `lib/manifest/userApiManifest/UserApiManifestV1.json`.
 */
export const USER_API_MANIFEST_SCHEMA_URL =
  typeof pkgVersion === 'string'
    ? `https://unpkg.com/@squiz/dx-json-schema-lib@${pkgVersion}/lib/manifest/userApiManifest/UserApiManifestV1.json`
    : 'https://unpkg.com/@squiz/dx-json-schema-lib@latest/lib/manifest/userApiManifest/UserApiManifestV1.json';

/**
 * JSON Schema bundle validating the full on-disk manifest (CLI / zip upload).
 */
export { default as USER_API_FULL_MANIFEST_SCHEMA } from './UserApiManifestV1.json';

/**
 * Validate the User API manifest before upload.
 *
 * @throws {SchemaValidationError} when validation fails.
 */
export function validateUserApiFullManifest(input: unknown): true {
  return fullManifestValidator.validateInput(input);
}