#!/usr/bin/env bash
set -euo pipefail

SDK="${ANDROID_HOME:-/opt/android-sdk}"
ADB="$SDK/platform-tools/adb"
EMULATOR="$SDK/emulator/emulator"
API="${1:-35}"

if [[ "$API" == "stop" ]]; then
  if "$ADB" devices | grep -q "emulator-"; then
    "$ADB" emu kill >/dev/null 2>&1 || true
    echo "Emulator stopped."
  else
    echo "No emulator is running."
  fi
  exit 0
fi

if [[ "$API" != "35" && "$API" != "29" ]]; then
  echo "Usage: $0 [35|29|stop] [window]" >&2
  exit 2
fi

AVD="cardash_tablet_api$API"
if ! "$ADB" devices | grep -q "emulator-"; then
  args=(
    -avd "$AVD"
    -no-audio
    -no-boot-anim
    -gpu swiftshader_indirect
    -no-snapshot
    -no-metrics
    -camera-back none
    -camera-front none
  )
  if [[ "${2:-}" != "window" ]]; then
    args+=(-no-window)
  fi
  echo "Booting $AVD (1280x800, landscape)…"
  nohup "$EMULATOR" "${args[@]}" > "/tmp/cardash-emulator-api$API.log" 2>&1 &
else
  echo "An emulator is already running; reusing it."
fi

"$ADB" wait-for-device
for _ in $(seq 1 90); do
  if [[ "$("$ADB" shell getprop sys.boot_completed 2>/dev/null | tr -d '\r')" == "1" ]]; then
    echo "Boot completed: $("$ADB" shell wm size | tr -d '\r') @ $("$ADB" shell wm density | tr -d '\r')"
    exit 0
  fi
  sleep 2
done

echo "Emulator did not report boot_completed. See /tmp/cardash-emulator-api$API.log" >&2
exit 1