#!/usr/bin/env bash
# Device helpers for driving the app over adb.
#
# TCL's AppBootManagerService refuses to let the app bind the WebView's renderer
# process while the display is dozing:
#
#   W/AppBootManager: Result[false]; Target[...SandboxedProcessService0];
#                     Caller[dev.ncode.sp404layers]; Reason[screen_off & caller care]
#
# With no renderer the page never parses: no crash, no JS error, an empty
# document.title, and DevTools Runtime.evaluate hangs. It is sticky for the life
# of the process, so reopening from Recents keeps the blank window.
#
# So: always ensure the screen is awake before launching, and say so plainly
# when it is not, rather than leaving a blank window to puzzle over.
set -euo pipefail

ADB="${ADB:-$HOME/Android/Sdk/platform-tools/adb}"
PKG=dev.ncode.sp404layers
ACT="$PKG/.MainActivity"
PORT=9333

ensure_awake() {
  "$ADB" shell input keyevent KEYCODE_WAKEUP >/dev/null 2>&1 || true
  "$ADB" shell input keyevent 82 >/dev/null 2>&1 || true

  local wake lock
  wake=$("$ADB" shell dumpsys power | grep -m1 -o 'mWakefulness=[A-Za-z]*' | cut -d= -f2 | tr -d '\r')
  lock=$("$ADB" shell dumpsys window | grep -m1 -o 'mDreamingLockscreen=[a-z]*' | cut -d= -f2 | tr -d '\r')

  if [ "$wake" != "Awake" ] || [ "$lock" = "true" ]; then
    echo "" >&2
    echo "  ####################################################################" >&2
    echo "  #  UNLOCK THE PHONE                                                #" >&2
    echo "  #                                                                  #" >&2
    echo "  #  wakefulness=$wake  lockscreen=$lock" >&2
    echo "  #                                                                  #" >&2
    echo "  #  While the screen is off, TCL denies the WebView renderer and    #" >&2
    echo "  #  the app shows a blank window with no error anywhere.            #" >&2
    echo "  ####################################################################" >&2
    echo "" >&2
    return 1
  fi
  echo "device awake and unlocked"
}

keep_awake() {
  "$ADB" shell svc power stayon usb >/dev/null
  echo "stay-awake while charging: ON  (revert with: scripts/device.sh sleep-normal)"
}

sleep_normal() {
  "$ADB" shell svc power stayon false >/dev/null
  echo "stay-awake: reverted to system default"
}

# Force-stop, start, and wait until the page is actually parsed - not merely
# until the activity is up, which happens even when the renderer was denied.
launch() {
  ensure_awake || return 1
  "$ADB" shell am force-stop "$PKG"
  "$ADB" shell am start -W -n "$ACT" >/dev/null

  local pid sock i
  # Read the pid AFTER starting: an `adb install -r` kills the old process, and
  # a stale pid makes the devtools socket lookup fail while the app is fine.
  pid=$("$ADB" shell pidof "$PKG" | tr -d '\r')
  for i in $(seq 1 60); do
    sock=$("$ADB" shell cat /proc/net/unix | grep -o "webview_devtools_remote_$pid" | head -1)
    if [ -n "$sock" ]; then
      "$ADB" forward "tcp:$PORT" "localabstract:$sock" >/dev/null 2>&1 || true
      if curl -s --max-time 1 "http://127.0.0.1:$PORT/json" | grep -q 'SP-404'; then
        echo "app loaded (pid $pid, $i polls)"
        return 0
      fi
    fi
  done

  echo "ERROR: activity started but the page never loaded." >&2
  echo "Renderer denials in the log:" >&2
  "$ADB" logcat -d | grep -E 'AppBootManager.*Result\[false\]|ChildProcessConn: Failed' | tail -4 >&2
  return 1
}

case "${1:-}" in
  awake)        ensure_awake ;;
  keep-awake)   keep_awake ;;
  sleep-normal) sleep_normal ;;
  launch)       launch ;;
  *) echo "usage: $0 {awake|keep-awake|sleep-normal|launch}" >&2; exit 2 ;;
esac