#!/usr/bin/env bash
# summarize-artillery.sh — Extract counters, rates and percentile stats from an
# Artillery JSON report. Mirrors scripts/loadtest/summarize-artillery.ps1.
# Usage: ./scripts/loadtest/summarize-artillery.sh <artillery-report.json>
set -euo pipefail

if [[ $# -lt 1 ]]; then
  echo "Usage: $0 <artillery-report.json>" >&2
  exit 2
fi
report_file="$1"
[[ -f "$report_file" ]] || { echo "Report file not found: $report_file" >&2; exit 1; }

REPORT_FILE="$report_file" node <<'EOF'
const fs = require('fs');
const report = JSON.parse(fs.readFileSync(process.env.REPORT_FILE, 'utf8'));
const aggregate = report.aggregate;
if (!aggregate) throw new Error('Artillery report is missing aggregate data.');

const get = (obj, name) => (obj && obj[name] !== undefined) ? obj[name] : undefined;
const counters = aggregate.counters || {};
const rates = aggregate.rates || {};
const summaries = aggregate.summaries || {};

const created = Number(get(counters, 'vusers.created') || 0);
const failed = Number(get(counters, 'vusers.failed') || 0);
const completed = Number(get(counters, 'vusers.completed') || 0);
const errorRate = created > 0 ? +((failed / created) * 100).toFixed(2) : 0;

console.log('=== Artillery WebSocket Summary ===');
console.log(`source: ${process.env.REPORT_FILE}`);
if (report.timestamp) console.log(`timestamp: ${report.timestamp}`);
console.log(`vusers.created: ${created}`);
console.log(`vusers.completed: ${completed}`);
console.log(`vusers.failed: ${failed}`);
console.log(`vusers.failure_rate_percent: ${errorRate}`);

for (const metric of ['ws.messages_sent', 'ws.messages_received', 'ws.ping', 'plugins.metrics-by-endpoint.response_time']) {
  const v = get(counters, metric);
  if (v !== undefined) console.log(`${metric}: ${v}`);
}
for (const [k, v] of Object.entries(rates || {})) console.log(`rate.${k}: ${v}`);

const fmt = (prefix, stats) => {
  if (!stats) return;
  const parts = [];
  for (const name of ['count', 'min', 'max', 'mean', 'median', 'p95', 'p99']) {
    const v = get(stats, name);
    if (v !== undefined) parts.push(`${name}=${v}`);
  }
  if (parts.length) console.log(`${prefix}: ${parts.join(', ')}`);
};
for (const [k, v] of Object.entries(summaries)) fmt(`summary.${k}`, v);
EOF