import { access, readFile } from "node:fs/promises";
import { dirname, resolve } from "node:path";
import { fileURLToPath } from "node:url";

const root = resolve(dirname(fileURLToPath(import.meta.url)), "..");
const parse = async (path) => JSON.parse(await readFile(resolve(root, path), "utf8"));

const registry = await parse("registry/registry.json");
const sources = await parse("registry/sources.json");
const components = await parse("registry/components.json");
const candidates = await parse("registry/candidates.json");

const failures = [];
const requireValue = (condition, message) => {
  if (!condition) failures.push(message);
};

requireValue(registry.schemaVersion === "1.0.0", "registry schemaVersion must be 1.0.0");
requireValue(registry.libraryVersion, "registry libraryVersion is required");
requireValue(Array.isArray(registry.packages) && registry.packages.length >= 4, "registry must list all packages");
requireValue(Array.isArray(sources.sources) && sources.sources.length >= 6, "source audit is incomplete");
requireValue(Array.isArray(components.components) && components.components.length >= 10, "component registry is incomplete");
requireValue(Array.isArray(candidates.candidates) && candidates.candidates.length >= 10, "candidate registry is incomplete");

const ids = components.components.map((component) => component.id);
requireValue(new Set(ids).size === ids.length, "component ids must be unique");
const candidateIds = candidates.candidates.map((component) => component.id);
requireValue(new Set(candidateIds).size === candidateIds.length, "candidate ids must be unique");
requireValue(candidateIds.every((id) => !ids.includes(id)), "a component cannot be both baseline and candidate");

for (const component of components.components) {
  requireValue(component.id && component.status && component.summary, `component entry is incomplete: ${component.id ?? "unknown"}`);
}

for (const pkg of registry.packages) {
  try {
    await access(resolve(root, pkg.path, "package.json"));
  } catch {
    failures.push(`missing package manifest: ${pkg.path}/package.json`);
  }
}

for (const path of Object.values(registry.documentation)) {
  try {
    await access(resolve(root, "registry", path));
  } catch {
    failures.push(`missing documentation target: ${path}`);
  }
}

if (failures.length > 0) {
  console.error(failures.map((failure) => `- ${failure}`).join("\n"));
  process.exit(1);
}

console.log(`Registry valid: ${components.components.length} components, ${candidates.candidates.length} candidates, ${sources.sources.length} audited sources.`);