#!/usr/bin/env bash
# =========================================================================
# #141 -- "missiles launch along the LEG/FOOT facing, then curve to the
# target -- PEER POV ONLY" (Oracle, night 13: "the emitter is following the
# foot facing"; shooter's own view correct).
#
# WHAT THE CODE SAYS SO FAR.  Both sides already pass the mount segment:
# MissileLauncher::FireWeapon (mislanch.cpp:363) and the REPLICANT salvo
# mirror (mislanch.cpp:478) each hand BTPushProjectile
# `GetSegmentIndex() /*task #67 mount frame*/`.  BTPushProjectile then
# rotates the authored MuzzleVelocity through
# `seg->GetSegmentToEntity() * localToWorld` -- so the launch direction IS
# the segment's world frame on BOTH nodes.  Task #67 fixed exactly this
# symptom once already, master-side ("missiles fire out of his back").
#
# So if the peer report is real, the difference is NOT which frame is asked
# for -- it is whether the replicant's SEGMENT actually carries the torso
# twist.  Torso pushes currentTwist into the skeleton on both paths
# (TorsoSimulation and TorsoCopySimulation both call UpdateJoints), so this
# has to be measured, not reasoned about.
#
# THE MEASUREMENT.  New [launchframe] receipt (BT_PROJ_LOG) prints, on both
# nodes, the yaw of the launch forward vs the BODY forward:
#     [launchframe] master    seg=N segResolved=1 segYaw=.. bodyYaw=.. twistDelta=..
#     [launchframe] REPLICANT seg=N segResolved=1 segYaw=.. bodyYaw=.. twistDelta=..
# twistDelta is the torso twist expressed in the launch direction.
#
#   BUG CONFIRMED: A (master) shows |twistDelta| sweeping well away from 0
#                  while B (replicant mirror) stays pinned near 0
#                  -- or B shows segResolved=0 (fell back to the body basis).
#   NOT REPRODUCED: both sides show the same twistDelta spread.
#
# ⚠ READ THE PREFIX, NOT THE PERCENTAGE (learned the hard way, 2026-08-08).
# BT_AUTOFIRE starts shooting IMMEDIATELY, while the app is still in
# WaitingForLaunch/LaunchingMission -- and Entity::Execute (ENTITY.cpp:556,
# real engine source) only calls PerformAndWatch when the state is
# RunningMission/EndingMission or the entity IsPreRunnable().  A REPLICANT mech
# is not pre-runnable (Entity::DefaultFlags has no PreRunFlag; only Player /
# Director add it, and Mech::Reset sets it for a reset MASTER), so a peer mech
# does not tick at all until the round actually starts.  Every salvo fired
# before that reads twistDelta=0 legitimately -- the peer has no twist yet.
# That is a BENCH artifact (nobody can fire pre-round in a real match), not a
# defect: it showed up as a clean leading run of zeros, e.g.
#     ZZZZ...(60)...ZZZZXXXX...(105)...XXXX
# and the first X lands within a few lines of the RunningMission transition.
# So: judge this bench by whether the failures are a PREFIX (fine) or
# INTERLEAVED (real), never by the raw percentage.
#
# Only A fires and only A sweeps its torso, so every REPLICANT line in B's
# log is a mirror of an A salvo and the comparison is unambiguous.
# =========================================================================
set -x
. /c/git/bt411/scratchpad/night6/bench_common.sh
cd /c/git/bt411/content || exit 1
taskkill //F //IM btl4.exe > /dev/null 2>&1
sleep 2
rm -f mf_a.log mf_b.log mf_relay.log
bt_expert_egg MP.EGG MF.EGG
sed -i "s/^map=.*/map=grass/; s/^time=.*/time=day/; s/^vehicle=.*/vehicle=madcat/" MF.EGG

# B: the OBSERVER.  Drives at A so it stays in range, but does NOT fire and
# does NOT sweep -- so every [launchframe] REPLICANT line in mf_b.log is a
# mirror of one of A's salvos.
( export BT_GOTO=enemy BT_GOTO_STOP=150
  export BT_PROJ_LOG=1 BT_MP_LOG=1
  bt_launch mf_b.log MF.EGG 0x0C -net 1601 )
sleep 2
# A: the SHOOTER.  Sweeps the torso hard so twistDelta is unmistakably
# non-zero at fire time, and autofires missiles at the designated enemy.
( export BT_GOTO=enemy BT_GOTO_STOP=150
  export BT_AUTOFIRE=1 BT_AF_MISSILE=1 BT_AF_PERIOD=7
  export BT_LOCK_SWEEP=0.35
  export BT_PROJ_LOG=1 BT_TORSO_LOG=1 BT_MP_LOG=1
  bt_launch mf_a.log MF.EGG 0x03 -net 1501 )
sleep 5
python ../tools/btconsole.py MF.EGG 127.0.0.1:1501 127.0.0.1:1601 > mf_relay.log 2>&1 &
RELAY=$!
sleep 300
kill $RELAY 2>/dev/null
sleep 3
bt_kill_ours; sleep 2; taskkill //F //IM btl4.exe > /dev/null 2>&1; sleep 3

echo "=================== #141 MISSILE LAUNCH FRAME ==================="
echo "--- did A fire, and did B mirror? ---"
echo -n "  A [launchframe] master lines ....... "; grep -ac "launchframe\] master" mf_a.log
echo -n "  B [launchframe] REPLICANT lines .... "; grep -ac "launchframe\] REPLICANT" mf_b.log
echo
echo "--- did the segment RESOLVE on each side? (segResolved=0 would be the bug) ---"
echo -n "  A segResolved=0 ... "; grep -a "launchframe\] master"    mf_a.log | grep -ac "segResolved=0"
echo -n "  B segResolved=0 ... "; grep -a "launchframe\] REPLICANT" mf_b.log | grep -ac "segResolved=0"
echo
echo "--- THE COMPARISON: twistDelta spread on each side ---"
python - <<'PY'
import re, io
def stats(path, tag):
    v = []
    try:
        for ln in io.open(path, encoding="latin-1", errors="replace"):
            if "[launchframe] " + tag in ln:
                m = re.search(r"twistDelta=([-\d.e+]+)", ln)
                if m:
                    try: v.append(float(m.group(1)))
                    except ValueError: pass
    except IOError:
        print("   %s: no log" % tag); return
    if not v:
        print("   %-9s no samples" % tag); return
    a = [abs(x) for x in v]
    big = sum(1 for x in a if x > 0.10)          # ~5.7 deg -- clearly twisted
    print("   %-9s n=%-4d  |twistDelta| max=%.4f  mean=%.4f  >0.10rad: %d (%.0f%%)"
          % (tag, len(v), max(a), sum(a)/len(a), big, 100.0*big/len(a)))
stats(r"C:\git\bt411\content\mf_a.log", "master")
stats(r"C:\git\bt411\content\mf_b.log", "REPLICANT")
print()
print("   VERDICT: master twisted + REPLICANT pinned near 0 => #141 CONFIRMED.")
print("            both twisted alike                       => NOT reproduced.")
PY
echo
echo "--- sample lines, both sides ---"
grep -a "launchframe\] master"    mf_a.log | head -4
grep -a "launchframe\] REPLICANT" mf_b.log | head -4