#!/bin/bash
set -e

# This is a wrapper script that runs the specific version of Android Studio that is recommended for developing in this repository.
# (This serves a similar purpose to gradlew)


function getStudioUrl() {
  version="3.3.0.17"
  ideaMajorVersion="182"
  buildNumber="5138683"
  osName="$1"
  studioUrl="https://dl.google.com/dl/android/studio/ide-zips/${version}/android-studio-ide-${ideaMajorVersion}.${buildNumber}-${osName}.zip"
  echo "${studioUrl}"
}

acceptsLicenseAgreement="$1"
scriptDir="$(cd $(dirname $0) && pwd)"
projectDir=$scriptDir
tempDir="${scriptDir}/studio"
function getOsName() {
  unameOutput="$(uname)"
  osName=""
  if [ "${unameOutput}" == "Linux" ]; then
    osName="linux"
  else
    osName="mac"
  fi
  echo "${osName}"
}
osName="$(getOsName)"
studioUrl="$(getStudioUrl $osName)"
studioDestName="$(basename ${studioUrl})"
studioZipPath="${tempDir}/${studioDestName}"
studioUnzippedPath="$(echo ${studioZipPath} | sed 's/\.zip$//')"

function downloadFile() {
  fromUrl="$1"
  destPath="$2"
  tempPath="${destPath}.tmp"
  echo "Downloading ${fromUrl} to ${destPath}"
  curl "${fromUrl}" > "${tempPath}"
  mv "${tempPath}" "${destPath}"
}

function checkLicenseAgreement() {
  # TODO: Is there a more official way to check that the user accepts the license?
  if [ "${acceptsLicenseAgreement}" != "-y" ]; then
    echo "Do you accept the license agreement at ${studioUnzippedPath}/android-studio/LICENSE.txt ?"
    echo "If you do, then rerun this script with a '-y' argument"
    exit 1
  fi
}

function updateStudio() {
  # skip if already up-to-date
  if stat "${studioZipPath}" >/dev/null 2>/dev/null; then
    # already up-to-date
    return
  fi

  mkdir -p "${tempDir}"
  downloadFile "${studioUrl}" "${studioZipPath}"
  echo

  echo "Removing previous installations"
  ls "${tempDir}" | grep -v "^${studioDestName}\$" | sed "s|^|${tempDir}/|" | xargs rm -rf

  echo "Unzipping"
  unzip "${studioZipPath}" -d "${studioUnzippedPath}"
}

function runStudioLinux() {
  studioPath="${studioUnzippedPath}/android-studio/bin/studio.sh"
  echo "$studioPath &"
  env STUDIO_PROPERTIES="${projectDir}/development/studio/idea.properties" \
      STUDIO_VM_OPTIONS="${projectDir}/development/studio/studio.vmoptions" \
      "${studioPath}" "${projectDir}" &
}

function runStudioMac() {
  studioPath="${studioUnzippedPath}/Android Studio.app"
  echo "open ${studioPath}"
  env STUDIO_PROPERTIES="${projectDir}/development/studio/idea.properties" \
      STUDIO_VM_OPTIONS="${projectDir}/development/studio/studio.vmoptions" \
      open "${studioPath}" "${projectDir}"
}

function runStudio() {
  if [ "${osName}" == "mac" ]; then
    runStudioMac
  else
    runStudioLinux
  fi
}

function main() {
  updateStudio
  checkLicenseAgreement
  runStudio
}

main