#!/usr/bin/env bash
# Phase 3 interop gate: seed each fixture torrent with libtorrent and download
# it with the from-scratch naut_leech, asserting a byte-identical content tree.
# Skips (exit 77 = ctest SKIP) if python libtorrent is unavailable.
set -u
ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
LEECH="${1:-$ROOT/build/naut_leech}"
SEEDER="$ROOT/tests/integration/seeder.py"
DATA="$ROOT/tests/fixtures/data"

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

fail=0
run_one() {
  local tor="$1" cmp="$2"
  local out; out="$(mktemp -d /tmp/naut_interop.XXXXXX)"
  local log; log="$(mktemp /tmp/naut_seed.XXXXXX)"
  python3 "$SEEDER" "$ROOT/tests/fixtures/$tor" "$DATA" > "$log" 2>&1 &
  local seed=$!
  local port=""
  for _ in $(seq 1 100); do port=$(grep -oP 'PORT \K[0-9]+' "$log" 2>/dev/null); [ -n "$port" ] && break; sleep 0.1; done
  if [ -z "$port" ]; then echo "FAIL[$tor]: seeder did not start"; cat "$log"; kill "$seed" 2>/dev/null; fail=1; rm -rf "$out" "$log"; return; fi

  if timeout 30 "$LEECH" "$ROOT/tests/fixtures/$tor" "$out" 127.0.0.1 "$port" 2>&1 | grep -q "COMPLETE"; then
    if diff -r "$out/$cmp" "$DATA/$cmp" >/dev/null; then
      echo "PASS[$tor]: byte-identical content tree"
    else
      echo "FAIL[$tor]: content mismatch"; fail=1
    fi
  else
    echo "FAIL[$tor]: download did not complete"; fail=1
  fi
  kill "$seed" 2>/dev/null; rm -rf "$out" "$log"
}

run_one single_v1.torrent single.bin
run_one multi_v1.torrent  multi
run_one hybrid.torrent    multi

exit $fail