#!/bin/bash

set -o errexit
set -o nounset
set -o pipefail
set -o noglob

# This script will deploy studio to the given cloudfront distribution/s3 bucket.
# This should only be called from the continuous deployment pipeline
# Usage: bin/s3-deploy

sync_s3() {
  bucket_name=${1}
  tag_name=${2}

  echo -e "Syncing assets..."
  aws s3 sync ./dist s3://${bucket_name}/${tag_name} --delete
  echo -e "${green}Done${reset}"
}

change_origin_path() {
  tag_name=${1}
  cloudfront_distribution_id=${2}

  echo -e "Changing cloudfront origin..."
  current_distribution_config=$(aws cloudfront get-distribution --id ${cloudfront_distribution_id})
  next_distribution_config=$(bin/lib/update-distribution ${tag_name} "${current_distribution_config}")
  etag=$(bin/lib/get-etag "${current_distribution_config}")
  aws cloudfront update-distribution --id ${cloudfront_distribution_id} --distribution-config ${next_distribution_config} --if-match ${etag}
  echo -e "${green}Done${reset}"
}

invalidate_cache() {
  cloudfront_distribution_id=${1}

  echo -e "Invalidating cloudfront cache..."
  aws cloudfront create-invalidation --distribution-id ${cloudfront_distribution_id} --paths /*
  echo -e "${green}Done${reset}"
}

deploy_to_git_tag() {
  tag_name=${1}
  cloudfront_distribution_id=${2}
  bucket_name=${3}

  echo -e "Deploying ${blue}${1}${reset}"
  sync_s3 ${bucket_name} ${tag_name}
  change_origin_path ${tag_name} ${cloudfront_distribution_id}
  invalidate_cache ${cloudfront_distribution_id}
}

main() {
  source bin/lib/colors
  cloudfront_distribution_id=${CLOUDFRONT_DISTRIBUTION_ID}
  bucket_name=${BUCKET_NAME}
  deploy_tag=$(git describe)

  if [ "${deploy_tag}" ]; then
    deploy_to_git_tag ${deploy_tag} ${cloudfront_distribution_id} ${bucket_name}
    echo -e "${green}Deploy success${reset}"
  else
    echo -e "${red}Deploy failure: no tag${reset}"
  fi
}

main "$@"