const fs = require('node:fs');
const path = require('node:path');

const summaryPath = path.resolve(process.cwd(), 'coverage', 'coverage-summary.json');
const thresholds = {
  statements: 90,
  lines: 90,
  functions: 90,
  branches: 70,
};

if (!fs.existsSync(summaryPath)) {
  console.error(`Coverage summary was not found at ${summaryPath}`);
  process.exit(1);
}

const summary = JSON.parse(fs.readFileSync(summaryPath, 'utf8'));
const serviceEntries = Object.entries(summary).filter(([file]) =>
  file.replace(/\\/g, '/').endsWith('.service.ts'),
);

if (!serviceEntries.length) {
  console.error('Coverage summary did not contain any service files');
  process.exit(1);
}

let failed = false;
console.log(`\nRuntime service coverage (${serviceEntries.length} files):`);

for (const [metric, minimum] of Object.entries(thresholds)) {
  const totals = serviceEntries.reduce(
    (result, [, coverage]) => ({
      covered: result.covered + coverage[metric].covered,
      total: result.total + coverage[metric].total,
    }),
    { covered: 0, total: 0 },
  );
  const percentage = totals.total === 0 ? 100 : (totals.covered / totals.total) * 100;
  const formatted = percentage.toFixed(2);
  const status = percentage >= minimum ? 'PASS' : 'FAIL';
  console.log(
    `  ${metric.padEnd(10)} ${formatted.padStart(6)}%  ` +
      `(${totals.covered}/${totals.total}, required ${minimum}%)  ${status}`,
  );
  failed ||= percentage < minimum;
}

if (failed) {
  console.error('\nRuntime service coverage gate failed.');
  process.exit(1);
}

console.log('\nRuntime service coverage gate passed.');