#!/usr/bin/env bash
# Phase 5 gate: trackerless magnet -> DHT peer -> ut_metadata -> verified data.
set -u
ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
SWARM="${1:-$ROOT/build/naut_swarm}"
SEEDER="$ROOT/tests/integration/seeder.py"
DHT="$ROOT/tests/integration/dht_fixture.py"
TORRENT="$ROOT/tests/fixtures/single_v1.torrent"
DATA="$ROOT/tests/fixtures/data"
MAGNET="magnet:?xt=urn:btih:7f2555dfd18ba1c4a024264e939d7a5f8b25311b"

python3 -c 'import libtorrent' 2>/dev/null || {
  echo "SKIP: python libtorrent not available"; exit 77;
}
[ -x "$SWARM" ] || { echo "FAIL: $SWARM not built"; exit 1; }

out="$(mktemp -d /tmp/naut_magnet.XXXXXX)"
seed_log="$(mktemp /tmp/naut_magnet_seed.XXXXXX)"
dht_log="$(mktemp /tmp/naut_magnet_dht.XXXXXX)"
client_log="$(mktemp /tmp/naut_magnet_client.XXXXXX)"
cleanup() {
  [ -n "${seed:-}" ] && kill "$seed" 2>/dev/null || true
  [ -n "${dht_pid:-}" ] && kill "$dht_pid" 2>/dev/null || true
  rm -rf "$out" "$seed_log" "$dht_log" "$client_log"
}
trap cleanup EXIT

python3 "$SEEDER" "$TORRENT" "$DATA" >"$seed_log" 2>&1 &
seed=$!
peer_port=""
for _ in $(seq 1 100); do
  peer_port=$(grep -oP 'PORT \K[0-9]+' "$seed_log" 2>/dev/null)
  [ -n "$peer_port" ] && break
  sleep 0.1
done
[ -n "$peer_port" ] || {
  echo "FAIL: seeder did not start"; cat "$seed_log"; exit 1;
}

python3 "$DHT" "$peer_port" >"$dht_log" 2>&1 &
dht_pid=$!
dht_port=""
for _ in $(seq 1 100); do
  dht_port=$(grep -oP 'DHT_PORT \K[0-9]+' "$dht_log" 2>/dev/null)
  [ -n "$dht_port" ] && break
  sleep 0.1
done
[ -n "$dht_port" ] || {
  echo "FAIL: DHT fixture did not start"; cat "$dht_log"; exit 1;
}

if ! NAUT_DHT_BOOTSTRAP="127.0.0.1:$dht_port" \
    timeout 30 "$SWARM" "$MAGNET" "$out" >"$client_log" 2>&1; then
  echo "FAIL: trackerless magnet download did not complete"
  cat "$client_log"
  cat "$seed_log"
  exit 1
fi
grep -q "magnet metadata verified" "$client_log" || {
  echo "FAIL: metadata was not verified"; cat "$client_log"; exit 1;
}
diff -r "$out/single.bin" "$DATA/single.bin" >/dev/null || {
  echo "FAIL: magnet content mismatch"; exit 1;
}
echo "PASS: DHT-only magnet completed with verified metadata and content"