#!/bin/bash
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.

set -ex

# set default environment variables
ROOT=$(pwd)
SCRIPTS=$(pwd)/scripts

RUN_ANDROID=0
RUN_CLI_INSTALL=1
RUN_IOS=0
RUN_JS=0

RETRY_COUNT=${RETRY_COUNT:-2}
AVD_UUID=$(< /dev/urandom tr -dc 'a-zA-Z0-9' | fold -w 8 | head -n 1)
ANDROID_NPM_DEPS="appium@1.5.1 mocha@2.4.5 wd@0.3.11 colors@1.0.3 pretty-data2@0.40.1"
CLI_PACKAGE="$ROOT/react-native-cli/react-native-cli-*.tgz"
PACKAGE="$ROOT/react-native-*.tgz"

# solve issue with max user watches limit
echo 65536 | tee -a /proc/sys/fs/inotify/max_user_watches
watchman shutdown-server

# retries command on failure
# $1 -- max attempts
# $2 -- command to run
function retry() {
    local -r -i max_attempts="$1"; shift
    local -r cmd="$*"
    local -i attempt_num=1

    until $cmd; do
        if (( attempt_num == max_attempts )); then
            echo "Execution of '$cmd' failed; no more attempts left"
            return 1
        else
            (( attempt_num++ ))
            echo "Execution of '$cmd' failed; retrying for attempt number $attempt_num..."
        fi
    done
}

# parse command line args & flags
while :; do
  case "$1" in
    --android)
      RUN_ANDROID=1
      shift
      ;;

    --ios)
      RUN_IOS=1
      shift
      ;;

    --js)
      RUN_JS=1
      shift
      ;;

    --skip-cli-install)
      RUN_CLI_INSTALL=0
      shift
      ;;

    *)
      break
  esac
done

function e2e_suite() {
    cd "$ROOT"

    if [ $RUN_ANDROID -eq 0 ] && [ $RUN_IOS -eq 0 ] && [ $RUN_JS -eq 0 ]; then
      echo "No e2e tests specified!"
      return 0
    fi

    # create temp dir
    TEMP_DIR=$(mktemp -d /tmp/react-native-XXXXXXXX)

    # To make sure we actually installed the local version
    # of react-native, we will create a temp file inside the template
    # and check that it exists after `react-native init
    IOS_MARKER="$(mktemp "$ROOT"/template/ios/HelloWorld/XXXXXXXX)"
    ANDROID_MARKER="$(mktemp "$ROOT"/template/android/XXXXXXXX)"

    # install CLI
    cd react-native-cli
    npm pack
    cd ..

    # can skip cli install for non sudo mode
    if [ $RUN_CLI_INSTALL -ne 0 ]; then
      if ! npm install -g "$CLI_PACKAGE"
      then
        echo "Could not install react-native-cli globally, please run in su mode"
        echo "Or with --skip-cli-install to skip this step"
        return 1
      fi
    fi

    if [ $RUN_ANDROID -ne 0 ]; then
        set +ex

        # create virtual device
        if ! android list avd | grep "$AVD_UUID" > /dev/null; then
            echo no | android create avd -n "$AVD_UUID" -f -t android-21 --abi default/armeabi-v7a
        fi

        # newline at end of adb devices call and first line is headers
        DEVICE_COUNT=$(adb devices | wc -l)
        ((DEVICE_COUNT -= 2))

        # will always kill an existing emulator if one exists for fresh setup
        if [[ $DEVICE_COUNT -ge 1 ]]; then
            adb emu kill
        fi

        # emulator setup
        emulator64-arm -avd "$AVD_UUID" -no-skin -no-audio -no-window -no-boot-anim &

        bootanim=""
        # shellcheck disable=SC2076
        until [[ "$bootanim" =~ "stopped" ]]; do
            sleep 5
            bootanim=$(adb -e shell getprop init.svc.bootanim 2>&1)
            echo "boot animation status=$bootanim"
        done

        set -ex

      if ! ./gradlew :ReactAndroid:installArchives -Pjobs=1 -Dorg.gradle.jvmargs="-Xmx512m -XX:+HeapDumpOnOutOfMemoryError"
      then
        echo "Failed to compile Android binaries"
        return 1
      fi
    fi

    if ! npm pack
    then
      echo "Failed to pack react-native"
      return 1
    fi

    cd "$TEMP_DIR"

    if ! retry "$RETRY_COUNT" react-native init EndToEndTest --version "$PACKAGE" --npm
    then
      echo "Failed to execute react-native init"
      echo "Most common reason is npm registry connectivity, try again"
      return 1
    fi

    cd EndToEndTest

    # android tests
    if [ $RUN_ANDROID -ne 0 ]; then
      echo "Running an Android e2e test"
      echo "Installing e2e framework"

      if ! retry "$RETRY_COUNT" npm install --save-dev "$ANDROID_NPM_DEPS" --silent >> /dev/null
      then
        echo "Failed to install appium"
        echo "Most common reason is npm registry connectivity, try again"
        return 1
      fi

      cp "$SCRIPTS/android-e2e-test.js" android-e2e-test.js

      (
      cd android || exit
      echo "Downloading Maven deps"
      ./gradlew :app:copyDownloadableDepsToLibs
      )

      keytool -genkey -v -keystore android/keystores/debug.keystore -storepass android -alias androiddebugkey -keypass android -dname "CN=Android Debug,O=Android,C=US"

      node ./node_modules/.bin/appium >> /dev/null &
      APPIUM_PID=$!
      echo "Starting appium server $APPIUM_PID"

      echo "Building app"
      buck build android/app

      # hack to get node unhung (kill buckd)
      if ! kill -9 "$(pgrep java)"
      then
        echo "could not execute Buck build, is it installed and in PATH?"
        return 1
      fi

      echo "Starting Metro"
      npm start >> /dev/null &
      SERVER_PID=$!
      sleep 15

      echo "Executing android e2e test"
      if ! retry "$RETRY_COUNT" node node_modules/.bin/_mocha android-e2e-test.js
      then
        echo "Failed to run Android e2e tests"
        echo "Most likely the code is broken"
        return 1
      fi

      # kill packager process
      if kill -0 "$SERVER_PID"; then
        echo "Killing packager $SERVER_PID"
        kill -9 "$SERVER_PID"
      fi

      # kill appium process
      if kill -0 "$APPIUM_PID"; then
        echo "Killing appium $APPIUM_PID"
        kill -9 "$APPIUM_PID"
      fi

    fi

    # ios tests
    if [ $RUN_IOS -ne 0 ]; then
      echo "Running ios e2e tests not yet implemented for docker!"
    fi

    # js tests
    if [ $RUN_JS -ne 0 ]; then
      # Check the packager produces a bundle (doesn't throw an error)
      if ! react-native bundle --max-workers 1 --platform android --dev true --entry-file index.js --bundle-output android-bundle.js
      then
        echo "Could not build android bundle"
        return 1
      fi

      if ! react-native bundle --max-workers 1 --platform ios --dev true --entry-file index.js --bundle-output ios-bundle.js
      then
        echo "Could not build iOS bundle"
        return 1
      fi

    # directory cleanup
    rm "$IOS_MARKER"
    rm "$ANDROID_MARKER"

    return 0
}

retry "$RETRY_COUNT" e2e_suite