#!/bin/sh
# run_ab.sh — A/B launcher v6.5 (bug) vs v6.6 (fix) with the display panned to
# buffer1 (yoffset=720). Reproduces the reported bug: launcher draws the menu
# to buffer0 while the panel shows buffer1 -> menu invisible.
HPID=976
st(){ awk '{print $3}' "/proc/$HPID/stat" 2>/dev/null; }
yoff(){ /data/fbprobe 2>/dev/null | grep -oE "yoffset = [0-9]+"; }

seed(){
  /data/fbtool blank 0 >/dev/null 2>&1   # unblank so pan is not EBUSY
  /data/fbtool pan 720 >/dev/null 2>&1   # display -> buffer1 (yoffset=720)
  echo "  seeded yoffset=$(yoff)"
}

run_one(){
  BIN=$1; TAG=$2
  seed
  echo "=== $TAG ($BIN) ==="
  rm -f /usr/data/meow_launcherd.pid
  "$BIN" --sim-hotkey 1200 --sim-exit 9000 >/tmp/m_$TAG.log 2>&1 &
  LPID=$!
  sleep 4
  echo "  DURING t=4s: player_stat=$(st) yoffset=$(yoff)"
  dd if=/dev/fb0 of=/tmp/${TAG}_menu_b0.raw bs=960 count=720 status=none 2>/dev/null
  echo "  menu_b0=$(md5sum /tmp/${TAG}_menu_b0.raw 2>/dev/null | awk '{print $1}')"
  echo "  log: $(grep -E 'fb:|fb backup|fb pan|menu open' /tmp/m_$TAG.log | tr '\n' ' | ')"
  sleep 6
  echo "  AFTER t=10s: player_stat=$(st) yoffset=$(yoff)"
  echo "  log2: $(grep -E 'fb restore|menu close|restore:|SIGCONT' /tmp/m_$TAG.log | tr '\n' ' | ')"
  kill "$LPID" 2>/dev/null; sleep 1; killall meow_launcherd 2>/dev/null
  echo "  killed; player_stat=$(st)"
}

echo "player pid=$HPID"
run_one /data/meow_launcherd.v65 OLD
run_one /data/meow_launcherd.v66 NEW
echo "=== cleanup: restore player's natural screen-off (brightness 0 + blank) ==="
/data/fbtool blank 0 >/dev/null 2>&1
/data/fbtool pan 0 >/dev/null 2>&1
echo "brightness now: $(cat /sys/class/backlight/backlight_pwm0/brightness)"
echo "final yoffset=$(yoff) player_stat=$(st)"
echo DONE