#!/bin/bash
set -euo pipefail

if [ "$#" -ne 1 ]; then
  echo >&2 "Takes one argument: android sdk number to start emulator for, example: 25"
  exit 1
fi

sdk="${1}"
name="android${sdk}"
maxtime="607"

start_emulator() {
  local pkg
  pkg="system-images;android-${sdk};google_apis;x86"

  echo >&2 "Updating the emulator..."
  echo y | sdkmanager "emulator"
  echo >&2 "Updating emulator for android sdk: ${sdk}"
  echo y | sdkmanager "${pkg}"

  echo >&2 "Deleting existing emulator..."
  avdmanager delete avd --name "${name}" || true
  echo >&2 "Creating emulator..."
  echo no | avdmanager create avd --name "${name}" --package "${pkg}"

  echo >&2 "Starting emulator..."
  # Bug in emulator script requires current directory
  local here
  here="$(pwd)"
  cd "${ANDROID_HOME}/emulator"
  ./emulator -avd "${name}" -no-window -no-audio &
  cd "${here}"
}

wait_for_emulator() {
  local timeout
  local end
  timeout=360
  end=$((SECONDS+timeout))

  while [ "${SECONDS}" -lt "${end}" ]; do
    bootanim="$(adb -e shell getprop init.svc.bootanim 2>&1 || echo "")"
    if [[ "${bootanim}" =~ "stopped" ]]; then
      echo "Emulator ready"
      return
    fi

    echo >&2 "Waiting: ${bootanim}..."
    sleep 5
  done

  echo >&2 "Emulator failed to start within ${timeout} seconds"
  exit 1
}

stop_emulator() {
  # Kill the process instead of using ADB since ADB will fail to kill
  # the emulator if it is still starting up
  echo >&2 "Killing emulator..."
  pkill --full "avd ${name}"
  #adb devices | grep emulator | cut -f1 | while read -r name; do
  #  echo >&2 "Stopping ${name}..."
  #  adb -s "${name}" emu kill
  #done
}

teardown() {
  stop_emulator
  pkill --full "sleep ${maxtime}"
}

GRADLE="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)/gradlew"
if ! [ -f "${GRADLE}" ]; then
  echo >&2 "Could not find gradle"
  exit 1
fi

# Always stop emulators (runs unless job is cancelled by gitlab)
trap teardown EXIT
# Do a sleep which will kill the emulator if it finishes (should only
# run if job is canceled by gitlab or job takes too long)
# Fix for this is in this MR: https://gitlab.com/gitlab-org/gitlab-ci-multi-runner/merge_requests/336
# which improves process killing.
sleep "${maxtime}" && stop_emulator &

start_emulator

# Might as well build while we are waiting for the emulator
${GRADLE} assembleDebug assembleAndroidTest

wait_for_emulator

# Unlock screen
adb shell input keyevent 82

# Test
${GRADLE} connectedAndroidTest