import { gt } from 'semver';

// Published identity is (Curio ID, version, target). Existing identities are immutable.
export function appendRelease(catalog, manifest, artifact, releasedAt) {
  const next = structuredClone(catalog);
  let curio = next.curios.find(item => item.id === manifest.id);
  if (!curio) {
    curio = { id: manifest.id, name: manifest.name, description: manifest.description ?? '', ...(manifest.icon ? { icon: manifest.icon } : {}), versions: [] };
    next.curios.push(curio);
  }
  let version = curio.versions.find(item => item.version === manifest.version);
  if (version && version.engine.trove !== manifest.engine.trove) {
    throw new Error(`${manifest.id}@${manifest.version}: published engine range cannot change; bump the plugin version`);
  }
  const existing = version?.artifacts.find(item => item.target === artifact.target);
  if (existing) {
    for (const key of ['sha256', 'size', 'url']) {
      if (existing[key] !== artifact[key]) throw new Error(`${manifest.id}@${manifest.version}/${artifact.target}: published ${key} differs; bump the plugin version`);
    }
    return next;
  }
  if (!version) {
    const newest = curio.versions.every(item => gt(manifest.version, item.version));
    version = { version: manifest.version, engine: structuredClone(manifest.engine), releasedAt, artifacts: [] };
    curio.versions.unshift(version);
    if (newest) {
      curio.name = manifest.name;
      curio.description = manifest.description ?? '';
      if (manifest.icon) curio.icon = manifest.icon;
    }
  }
  version.artifacts.push(structuredClone(artifact));
  next.generatedAt = next.generatedAt > releasedAt ? next.generatedAt : releasedAt;
  return next;
}