#!/usr/bin/env bash
# Pinch e2e test harness for the Pad emulator (aosp_atd AVD).
#
# The platform-signed touch.inject app (real MotionEvents through
# InputManager — the only multi-touch path that works in the emulator)
# drives the renderer's pinch probe; each gesture below is ONE script in
# ONE process (the injector's finger map is per-process).
#
# KNOWN FLAKES (both verified, both handled below):
#  1. The injector process is "cached" while its script thread runs and the
#     1.5 GB emulator OOM-kills it mid-script occasionally — the script
#     never reaches "=== done". ti() checks logcat for the done line and
#     re-runs (a re-run starts a fresh gesture; a stuck pointer from a
#     half-run is replaced by the next ACTION_DOWN).
#  2. The app is on-demand-rendering at ~1 fps: a burst of moves within
#     one frame's drain does not scroll (single-frame delta pattern).
#     Scroll tests therefore space the moves >= 40 ms apart — which is
#     also what a real finger produces over several frames.
#
# READING RESULTS: AppFontScale in the session file is the reliable pinch
# signal. Scroll in the session is NOT (the restore re-derives it from the
# pinned line anchor); for scroll tests compare the before/after
# screenshots instead.
SER=emulator-5554
export ANDROID_SERIAL=$SER

ti() {
  local script="$1"
  for attempt in 1 2 3; do
    adb logcat -c 2>/dev/null
    adb shell 'am broadcast -n "touch.inject/.Injector$ScriptReceiver" --es script "'"$script"'"' >/dev/null 2>&1
    sleep 4
    if adb shell logcat -d 2>/dev/null | grep -aq "TouchInject: === done"; then
      return 0
    fi
    echo "  (injection incomplete, attempt $attempt — retrying)"
  done
  echo "  !! injection failed after 3 attempts"
  return 1
}
# ensure Pad is in the foreground (the ATD launcher intermittently holds
# focus after a cold start; a backgrounded app receives no touch)
fg() {
  for i in 1 2 3 4 5; do
    FOC=$(adb shell 'dumpsys window | grep mCurrentFocus')
    case "$FOC" in *pad.pad*) return 0;; esac
    adb shell am start -n pad.pad/org.gioui.GioActivity >/dev/null 2>&1
    sleep 8
  done
  echo "  !! Pad never gained focus: $FOC"
  return 1
}
dbg() { adb shell "echo '$1' > /sdcard/PadPerf/cmd"; sleep 1.5; }
shot() { adb exec-out screencap -p > "$1"; }
# force-stop (flushes the session), print it, relaunch + reopen the file
measure() {
  adb shell am force-stop pad.pad
  sleep 4
  echo "session: $(adb shell cat /sdcard/Pad/session.json 2>/dev/null)"
  adb shell am start -n pad.pad/org.gioui.GioActivity >/dev/null 2>&1
  sleep 4
}

case "$1" in
t1) # single-finger scroll must NEVER change the font (device regression)
  echo "=== T1: single-finger scroll (font must not change) ==="
  fg || exit 1
  shot /tmp/t1_before.png
  S="down 1 720 1400 wait 80"
  for y in 1320 1240 1160 1080 1000 920 840 760 680 600 520 440 360 280 200; do
    S="$S move 1 720 $y wait 40"
  done
  S="$S wait 100 up 1"
  ti "$S"
  sleep 2
  shot /tmp/t1_after.png   # compare to before: content moved, same font size
  measure
  ;;
t2) # two-finger pinch-out: font must scale, center anchored
  echo "=== T2: two-finger pinch-out (font must grow) ==="
  fg || exit 1
  shot /tmp/t2_before.png
  S="down 1 570 1200 wait 40 down 2 870 1200 wait 60"
  for i in 1 2 3 4 5 6 7 8; do
    x1=$((570 - i*37)); x2=$((870 + i*37))
    S="$S move 1 $x1 1200 move 2 $x2 1200 wait 50"
  done
  S="$S wait 150 up 1 up 2"
  ti "$S"
  sleep 1
  shot /tmp/t2_after.png
  measure
  ;;
t3) # palm-first: the resting finger lands FIRST, the pinch pair is the
    # two that move — the palm must never enter the distance
  echo "=== T3: palm-first three fingers (pinch pair = the two movers) ==="
  fg || exit 1
  shot /tmp/t3_before.png
  S="down 1 720 400 wait 100 down 2 570 1200 wait 60 down 3 870 1200 wait 150"
  for i in 1 2 3 4 5 6 7 8; do
    x2=$((570 - i*37)); x3=$((870 + i*37))
    S="$S move 2 $x2 1200 move 3 $x3 1200 wait 50"
  done
  S="$S wait 150 up 2 up 3 wait 50 up 1"
  ti "$S"
  sleep 1
  shot /tmp/t3_after.png
  measure
  ;;
t4) # lift one finger mid-pinch: survivor must SCROLL, not zoom
  echo "=== T4: lift finger mid-pinch (survivor scrolls, no more zoom) ==="
  fg || exit 1
  shot /tmp/t4_before.png
  S="down 1 570 1200 wait 40 down 2 870 1200 wait 60 move 1 533 1200 move 2 907 1200 wait 80 up 2 wait 80"
  for y in 1280 1360 1440 1520 1600 1680 1760 1840 1920 2000; do
    S="$S move 1 533 $y wait 40"   # survivor (finger 1) keeps its own x
  done
  S="$S wait 100 up 1"
  ti "$S"
  sleep 1
  shot /tmp/t4_after.png   # compare to before: content scrolled, font frozen
  measure
  ;;
reset) # back to a known state (one command per file — no pipes)
  dbg "fontsize 1"; dbg "top"
  ;;
*) echo "usage: $0 t1|t2|t3|t4|reset" ;;
esac