import type { BuiltManifest } from './manifest-builder';

/** Publisher-owned package information, independent of component identities. */
export interface PackageInformation {
  key: string;
  name: string;
  type: 'managed' | 'unmanaged';
  description?: string;
}

/** Package information and a reference to the project's source manifest. */
export interface PackageManifest {
  package: PackageInformation;
  version: string;
  manifest: Readonly<BuiltManifest>;
}

/** Define package information around an existing manifest without compiling its sources. */
export function definePackageManifest(input: PackageManifest): Readonly<PackageManifest> {
  if (!/^[a-z][a-z0-9_]{0,99}$/.test(input.package.key))
    throw new Error(
      'Package key must start with a lowercase letter and contain only lowercase letters, digits, or underscores (maximum 100 characters).',
    );
  if (input.package.key.includes('rippling'))
    throw new Error('Package key cannot contain the reserved name rippling.');
  if (!input.package.name.trim()) throw new Error('Package name is required.');
  if (input.package.type !== 'managed' && input.package.type !== 'unmanaged')
    throw new Error('Package type must be managed or unmanaged.');
  if (!/^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)$/.test(input.version))
    throw new Error('Package version must be major.minor.patch.');
  if (input.manifest.metadata == null || !Array.isArray(input.manifest.components))
    throw new Error('Package manifest requires metadata and components.');
  if (input.manifest.components_to_delete != null && input.manifest.components_to_delete.length > 0)
    throw new Error('Package snapshots cannot contain component deletions.');
  return Object.freeze({
    package: Object.freeze({ ...input.package }),
    version: input.version,
    manifest: input.manifest,
  });
}