/**
 * Fail CI if coverage is below thresholds.
 * Reads coverage/coverage-summary.json produced by Vitest (v8 provider).
 */
import fs from "node:fs";
import path from "node:path";

const SUMMARY = path.join("coverage", "coverage-summary.json");
if (!fs.existsSync(SUMMARY)) {
  console.error("coverage/coverage-summary.json not found. Did tests run with --coverage?");
  process.exit(1);
}

const data = JSON.parse(fs.readFileSync(SUMMARY, "utf8"));
const total = data.total || {};

const want = {
  lines: Number(process.env.COV_LINES || 70),
  branches: Number(process.env.COV_BRANCHES || 70),
  functions: Number(process.env.COV_FUNCTIONS || 50),
  statements: Number(process.env.COV_STATEMENTS || 70),
};

const got = {
  lines: total.lines?.pct ?? 0,
  branches: total.branches?.pct ?? 0,
  functions: total.functions?.pct ?? 0,
  statements: total.statements?.pct ?? 0,
};

function fail(msg) {
  console.error(msg);
  console.error("Coverage totals:", JSON.stringify(got));
  process.exit(1);
}

let ok = true;
for (const k of Object.keys(want)) {
  if (got[k] < want[k]) {
    ok = false;
    console.error(`✖ ${k} coverage ${got[k]}% < required ${want[k]}%`);
  } else {
    console.log(`✔ ${k} coverage ${got[k]}% >= required ${want[k]}%`);
  }
}
if (!ok) {
  fail("Coverage thresholds not met.");
}
console.log("All coverage thresholds satisfied.");