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

const projectRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "../..");
const slug = process.argv[2];

if (!slug || !/^[a-z0-9-]+$/.test(slug)) {
  throw new Error("Usage: node scripts/dungeon-pipeline/compact-conversion-fallback-warnings.mjs <slug>");
}

const reportPath = path.join(
  projectRoot,
  "dungeon-pipeline",
  "work",
  slug,
  "staging",
  "environment",
  "conversion-report.json",
);
const report = JSON.parse(await readFile(reportPath, "utf8"));
const aliases = (report.sourceFallbacks ?? []).filter(
  (fallback) => fallback.provenance === "client-extension-alias",
);
const warnings = (report.warnings ?? []).filter(
  (warning) => !(
    warning.startsWith("Installed-client extraction fallback:")
    && warning.includes("canonical installed-client asset uses the M2 extension")
  ) && !warning.startsWith("Resolved ")
    && !warning.includes("legacy MDX placement reference(s)"),
);

if (aliases.length) {
  warnings.push(
    `Resolved ${aliases.length} legacy MDX placement reference(s) to canonical installed-client M2 paths; `
    + "exact alias provenance is retained in sourceFallbacks.",
  );
}

report.warnings = warnings;
await writeFile(reportPath, `${JSON.stringify(report, null, 2)}\n`, "utf8");
console.log(JSON.stringify({
  status: "green",
  slug,
  aliases: aliases.length,
  warnings: warnings.length,
  report: path.relative(projectRoot, reportPath).replace(/\\/g, "/"),
}, null, 2));