#!/usr/bin/env bash
# End-to-end integration test: boot a dedicated server, connect two scripted
# bot clients over a real ENet socket, and assert that the whole loop happened --
# handshake, lobby, portal into a dungeon, and the emergency escape back.
#
# This is the test that catches everything unit tests structurally cannot: RPC
# wiring, codec round-trips over the wire, instance transfers, and the client's
# reconciliation loop. Run it before calling any networking change done.
#
#   tools/smoke.sh            # ~35s
#   KEEP=1 tools/smoke.sh     # keep the logs and print where they are
set -uo pipefail
cd "$(dirname "$0")/.."
GODOT="${GODOT:-godot}"
PORT="${PORT:-27099}"
SERVER_TICKS="${SERVER_TICKS:-2000}"
CLIENT_TICKS="${CLIENT_TICKS:-1700}"
OUT="$(mktemp -d -t transcience-smoke-XXXXXX)"

PIDS=()
cleanup() {
  for pid in "${PIDS[@]:-}"; do
    kill "$pid" 2>/dev/null
  done
  wait 2>/dev/null
  if [[ "${KEEP:-0}" == "1" ]]; then
    echo "logs kept in $OUT"
  else
    rm -rf "$OUT"
  fi
}
trap cleanup EXIT

echo "smoke: server on port $PORT, logs in $OUT"
# A scratch character store: without it a rerun resumes the characters the
# previous run created, and "a character was created" stops being true.
"$GODOT" --headless --path . -- --server --port "$PORT" --autoquit "$SERVER_TICKS" \
  --store "$OUT/characters.json" \
  > "$OUT/server.log" 2>&1 &
PIDS+=($!)

for _ in $(seq 1 60); do
  grep -q "SERVER_READY" "$OUT/server.log" 2>/dev/null && break
  sleep 0.25
done
if ! grep -q "SERVER_READY" "$OUT/server.log" 2>/dev/null; then
  echo "FAIL: server never became ready"; cat "$OUT/server.log"; exit 1
fi

for n in 1 2; do
  "$GODOT" --headless --path . -- --bot --host 127.0.0.1 --port "$PORT" \
    --name "bot$n" --account "$((7000 + n))" \
    --autoquit "$CLIENT_TICKS" > "$OUT/bot$n.log" 2>&1 &
  PIDS+=($!)
  sleep 0.4
done

# A fourth bot that leaves *politely* -- the same Net.shutdown() the in-game
# menu's "Disconnect" button calls. The escape channel is keyed on the socket
# closing, not on how it closed, so a clean exit must be caught exactly like the
# SIGKILL below. If someone ever adds a "clean leave" message that bypasses the
# channel, this is what catches it.
"$GODOT" --headless --path . -- --bot --host 127.0.0.1 --port "$PORT" \
  --name "leavebot" --account 7101 --leave-after 120 --autoquit "$CLIENT_TICKS" \
  > "$OUT/leavebot.log" 2>&1 &
PIDS+=($!)
sleep 0.4

# A third bot that gets SIGKILLed the moment it is inside a dungeon. This is the
# anti-disconnect-cheese path: the server must keep its body in the world,
# channel it out over the same one second the escape button costs, and only then
# forget the peer -- never delete it instantly on socket close.
"$GODOT" --headless --path . -- --bot --host 127.0.0.1 --port "$PORT" \
  --name "dropbot" --account 7102 --autoquit "$CLIENT_TICKS" > "$OUT/dropbot.log" 2>&1 &
DROP_PID=$!
for _ in $(seq 1 80); do
  grep -q "entered instance .*DUNGEON" "$OUT/dropbot.log" 2>/dev/null && break
  sleep 0.25
done
if grep -q "entered instance .*DUNGEON" "$OUT/dropbot.log" 2>/dev/null; then
  # Reaped here so bash does not print its own "Killed" job-control line; the
  # kill is the point of the test, not a failure.
  { kill -9 "$DROP_PID"; wait "$DROP_PID"; } 2>/dev/null || true
else
  echo "  WARN dropbot never reached a dungeon; drop assertions will fail"
  PIDS+=("$DROP_PID")
fi

wait 2>/dev/null

fails=0
check() { # check <label> <file> <pattern>
  if grep -qE "$3" "$2"; then
    echo "  ok   $1"
  else
    echo "  FAIL $1  (no match for /$3/ in $(basename "$2"))"
    fails=$((fails + 1))
  fi
}
refute() { # refute <label> <file> <pattern>
  local hits
  hits=$(grep -cE "$3" "$2" || true)
  if [[ "$hits" == "0" ]]; then
    echo "  ok   $1"
  else
    echo "  FAIL $1  ($hits line(s) matched /$3/ in $(basename "$2"))"
    grep -E "$3" "$2" | head -5 | sed 's/^/       /'
    fails=$((fails + 1))
  fi
}

echo "assertions:"
check  "bot1 authenticated"          "$OUT/server.log" "authenticated as account 7001"
check  "bot2 authenticated"          "$OUT/server.log" "authenticated as account 7002"
check  "a character was created"     "$OUT/server.log" "created 'bot1'"
check  "and persisted to the store"  "$OUT/characters.json" "bot1"
check  "and are played"              "$OUT/server.log" "playing 'bot1'"
# The bots press interact and the use key while in a dungeon, so the item half
# of the input frame crosses a real socket on every run. What they almost never
# do is produce a drop to act on -- that end of it is tools/diag_loot.tscn.
check  "inventories reach the save file" "$OUT/characters.json" "\"inventory\""
check  "a dungeon instance opened"   "$OUT/server.log" "opened dungeon instance"
check  "emergency escape completed"  "$OUT/server.log" "escaped to lobby"
check  "bot1 reached a dungeon"      "$OUT/bot1.log"   "entered instance .*DUNGEON"
check  "bot1 returned to the lobby"  "$OUT/bot1.log"   "entered instance .*LOBBY"
check  "a hard drop is channelled, not instant" \
                                     "$OUT/server.log" "dropped in instance [0-9]+, channelling out"
check  "the dropped body is released"  "$OUT/server.log" "released from instance [0-9]+ after drop"
check  "a polite disconnect leaves too"  "$OUT/leavebot.log" "BOT_GRACEFUL_LEAVE"
check  "a polite disconnect is also channelled" \
                                     "$OUT/server.log" "'leavebot' dropped in instance [0-9]+, channelling out"
refute "no server script errors"     "$OUT/server.log" "SCRIPT ERROR|Parse Error|USER ERROR"
refute "no client script errors"     "$OUT/bot1.log"   "SCRIPT ERROR|Parse Error|USER ERROR"

echo
if [[ $fails -eq 0 ]]; then
  echo "SMOKE PASS"
else
  echo "SMOKE FAIL ($fails)"
  echo "--- server.log (tail) ---"; tail -40 "$OUT/server.log"
  echo "--- bot1.log (tail) ---";   tail -40 "$OUT/bot1.log"
fi
exit $fails