#!/usr/bin/env bash
# gstack-specialist-stats — compute per-specialist hit rates from review history
# Usage: gstack-specialist-stats
#
# Reads all *-reviews.jsonl files across branches, parses specialist fields,
# and outputs hit rates. Tags specialists as GATE_CANDIDATE (0 findings in 10+
# dispatches) or NEVER_GATE (security, data-migration — insurance policy).
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
eval "$("$SCRIPT_DIR/gstack-slug" 2>/dev/null)"
GSTACK_HOME="${GSTACK_HOME:-$HOME/.gstack}"
PROJECT_DIR="$GSTACK_HOME/projects/$SLUG"

if [ ! -d "$PROJECT_DIR" ]; then
  echo "SPECIALIST_STATS: 0 reviews analyzed"
  exit 0
fi

# Collect all review JSONL files (strip ---CONFIG--- and ---HEAD--- footers)
COMBINED=""
for f in "$PROJECT_DIR"/*-reviews.jsonl; do
  [ -f "$f" ] || continue
  COMBINED="$COMBINED$(sed '/^---/,$d' "$f" 2>/dev/null)
"
done

if [ -z "$COMBINED" ]; then
  echo "SPECIALIST_STATS: 0 reviews analyzed"
  exit 0
fi

printf '%s' "$COMBINED" | bun -e "
const lines = (await Bun.stdin.text()).trim().split('\n').filter(Boolean);
const NEVER_GATE = new Set(['security', 'data-migration']);
const stats = {};
let reviewed = 0;

for (const line of lines) {
  try {
    const e = JSON.parse(line);
    if (!e.specialists) continue;
    reviewed++;
    for (const [name, info] of Object.entries(e.specialists)) {
      if (!stats[name]) stats[name] = { dispatched: 0, findings: 0 };
      if (info.dispatched) {
        stats[name].dispatched++;
        stats[name].findings += (info.findings || 0);
      }
    }
  } catch {}
}

console.log('SPECIALIST_STATS: ' + reviewed + ' reviews analyzed');
const sorted = Object.entries(stats).sort((a, b) => a[0].localeCompare(b[0]));
for (const [name, s] of sorted) {
  const pct = s.dispatched > 0 ? Math.round(100 * s.findings / s.dispatched) : 0;
  let tag = '';
  if (NEVER_GATE.has(name)) {
    tag = ' [NEVER_GATE]';
  } else if (s.dispatched >= 10 && s.findings === 0) {
    tag = ' [GATE_CANDIDATE]';
  }
  console.log(name + ': ' + s.dispatched + '/' + reviewed + ' dispatched, ' + s.findings + ' findings (' + pct + '%)' + tag);
}
" 2>/dev/null || { echo "SPECIALIST_STATS: 0 reviews analyzed"; exit 0; }