import { PackageURL, tryParse, isValid, validateString } from '@interlynk-io/purl-js';

// Parse a PURL string
const purl = PackageURL.parse('pkg:npm/%40angular/[email protected]');
console.log(purl.type);      // "npm"
console.log(purl.namespace);  // "@angular"
console.log(purl.name);       // "core"
console.log(purl.version);    // "16.2.0"

// Build a PURL from components
const built = new PackageURL('pypi', null, 'Django', '4.2', null, null);
console.log(built.toString()); // "pkg:pypi/[email protected]"

// Safe parsing (returns null instead of throwing)
const result = tryParse('not-a-purl'); // null

// Validation
isValid('pkg:npm/[email protected]');  // true
isValid('pkg:julia/Flux');           // false (requires uuid qualifier)

const components = sbom.components.map(c => {
  const purl = tryParse(c.purl);
  return {
    ecosystem: purl?.type,
    package: purl?.name,
    version: purl?.version,
    scope: purl?.namespace,
  };
});

const current = PackageURL.parse('pkg:npm/[email protected]');
const updated = PackageURL.parse('pkg:npm/[email protected]');

if (current.matchesBase(updated) && !current.equals(updated)) {
  console.log(`Update available: ${current.version} -> ${updated.version}`);
}

function handlePurlInput(input: string) {
  const err = validateString(input);
  if (err) {
    return { valid: false, errors: err.errors.map(e => e.message) };
  }
  return { valid: true, purl: PackageURL.parse(input) };
}

new PackageURL('npm', '@angular', 'core', '16.2.0', null, null).toString();
// "pkg:npm/%40angular/[email protected]"

new PackageURL('maven', 'org.junit', 'junit', '5.0', { classifier: 'sources' }, null).toString();
// "pkg:maven/org.junit/[email protected]?classifier=sources"

new PackageURL('docker', 'library', 'nginx', 'latest', { arch: 'amd64' }, null).toString();
// "pkg:docker/library/nginx@latest?arch=amd64"

// PyPI: underscores become dashes, name lowercased
PackageURL.parse('pkg:pypi/[email protected]').toString();
// "pkg:pypi/[email protected]"

// npm: namespace and name lowercased
PackageURL.parse('pkg:npm/%40Angular/[email protected]').toString();
// "pkg:npm/%40angular/[email protected]"

// Hugging Face: version (commit hash) lowercased
PackageURL.parse('pkg:huggingface/google/bert-base-uncased@CD5EF3A3').toString();
// "pkg:huggingface/google/bert-base-uncased@cd5ef3a3"

import { lookupType, registeredTypes, registerType } from '@interlynk-io/purl-js';

const pypi = lookupType('pypi');
console.log(pypi?.namespace.requirement);  // "prohibited"
console.log(pypi?.name.caseSensitive);     // false

console.log(registeredTypes());
// ["alpm", "apk", "bazel", "bitbucket", "bitnami", "cargo", ...]

registerType({
  type: 'custom',
  typeName: 'Custom',
  description: 'My custom package type',
  repository: { useRepository: false },
  namespace: { requirement: 'optional', caseSensitive: true },
  name: { requirement: 'required', caseSensitive: true },
  version: { requirement: 'optional', caseSensitive: true },
  examples: ['pkg:custom/[email protected]'],
});

// For untrusted input, prefer parse() or tryParse()
const purl = tryParse(userInput);
if (!purl) { /* handle invalid input */ }

// If using the constructor with user-supplied components, validate afterward
const built = new PackageURL(type, ns, name, ver, quals, sub);
const err = built.validate();
if (err) { /* handle validation errors */ }