#!/bin/bash

set -e

exec 3>&1 # make stdout available as fd 3 for the result
exec 1>&2 # redirect all output to stderr for logging

echo "BUILD_ID: $BUILD_ID"
echo "BUILD_NAME: $BUILD_NAME"
echo "BUILD_JOB_NAME: $BUILD_JOB_NAME"
echo "BUILD_PIPELINE_NAME: $BUILD_PIPELINE_NAME"

# shellcheck disable=1090
source "$(dirname $0)/common.sh"

source=$1

if [[ -z "$source" ]]; then
  echo "usage: $0 <path/to/source>"
  exit 1
fi

# for jq
PATH=/usr/local/bin:$PATH

payload=$(mktemp "$TMPDIR/rclone-resource-request.XXXXXX")
cat > "$payload" <&0

load_config "$payload"
load_files "$payload"

rclone_source_directory=$(jq -r '.params.source // ""' < "$payload")
rclone_destinations=$(jq -r '.params.destination[]? | .dir // ""' < "$payload")

if [[ -z "$rclone_source_directory" ]]; then
  echo "invalid source directory (missing source)"
  exit 1
fi

if [[ -z "$rclone_destinations" ]]; then
  echo "invalid destination (missing destination)"
  exit 1
fi

echo "Source directory: $rclone_source_directory"
echo "Destinations:"
jq -c '.params.destination[] | .dir' < "$payload"

local_source_dir="${source}/${rclone_source_directory}"
ls -alh "${local_source_dir}"

echo "Generating SHA256"
sha256_file="${TMPDIR}/rclone_source.sha256"
touch "${sha256_file}"
(find "${local_source_dir}" -type f -exec sha256sum {} \;) | cut -d ' ' -f1 | xargs echo >> "${sha256_file}"
sha256=$(sha256sum "${sha256_file}" | cut -d' ' -f1)
echo "sha256:${sha256}"

# Source is always the same for each destination
rclone_source="${local_source_dir}"
echo "Source: ${rclone_source}"

rclone_sha1=$(rclone sha1sum "${rclone_source}" | cut -d' ' -f1)
echo "rclone sha1:${rclone_sha1}"

destinations=$(jq -r '.params.destination[] | @base64' < "$payload")
echo "Using encoded destinations:"
echo " ${destinations}"

file_links=()

for destination in $destinations; do
  _jq() {
    echo "${destination}" | base64 -d | jq -r "${1}"
  }

  rclone_destination=$(_jq '.dir')
  rclone_destination_subdir_file=$(_jq '.subdir // ""')
  rclone_dedupe=$(_jq '.dedupe // "false"')
  rclone_dedupe_mode=$(_jq '.dedupeMode // "newest"')
  rclone_args=$(_jq '.args // [] | join(" ")')
  rclone_link=$(_jq '.link // "false"')
  rclone_link_find_filter=$(_jq '.linkFilter // "-maxdepth 1 -type f"')

  echo "Destination: $rclone_destination"
  echo "Destination subdir file: ${rclone_destination_subdir_file}"
  echo "Run dedupe: ${rclone_dedupe}"
  echo "Dedupe mode: ${rclone_dedupe_mode}"
  echo "Additonal args: ${rclone_args}"
  echo "Generate link: ${rclone_link}"
  echo "Link find filter: ${rclone_link_find_filter}"

  rclone_destination_subdir=""
  if [ -n "$rclone_destination_subdir_file" ]; then
    echo "Looking in ${source}/${rclone_destination_subdir_file} for subdir to use"
    rclone_destination_subdir=$(head -n 1 < "${source}/${rclone_destination_subdir_file}")
  fi

  rclone_target="${rclone_destination}/${rclone_destination_subdir}"
  echo "Target: ${rclone_target}"
  # shellcheck disable=2086
  rclone copy "${rclone_source}" "${rclone_target}" --size-only --progress --stats=2s ${rclone_args}

  if [[ "$rclone_dedupe" == "true" ]]; then
    echo "Running Dedupe for: ${rclone_target}"
     # shellcheck disable=2086
    rclone dedupe --dedupe-mode "${rclone_dedupe_mode}" "${rclone_target}" --progress --stats=2s ${rclone_args}
  fi

  if [[ "${rclone_link}" == "true" ]]; then
    # shellcheck disable=2086
    filesToLink=$(find "${rclone_source}" ${rclone_link_find_filter})
    echo "Files to link:"
    echo "${filesToLink}"
    for file in ${filesToLink}; do
      rclone_target_file="${rclone_target}/${file}"
      echo "Generating Link for: ${rclone_target_file}"
      file_link=$(rclone link "${rclone_target_file}")
      file_links+=( "${rclone_target_file}" "${file_link}" )
    done
  fi

  echo "rclone job complete for ${rclone_source} -> ${rclone_target}"
done

if (( ${#file_links[@]} )); then
  echo "File Links:" "${file_links[@]}"
  # shellcheck disable=2068
  metadata=$(printf '{"name": "%s", "value": "%s"},' ${file_links[@]})
  metadata=${metadata::-1}
  links_json=$( echo -n "{\"links\":[${metadata}]}" | jq -r . )
  echo "Links: ${links_json}"
  echo "$links_json" > "${rclone_source_directory}/.rclone/links"
  jq -n "{
    version: {
      $( echo -n "build:${BUILD_ID}" | jq -R .),
      digest: $( echo -n "sha256:$sha256" | jq -R . ),
      metadata: ${links_json}
    }
  }" >&3
else 
  jq -n "{
    version: {
      $( echo -n "build:${BUILD_ID}" | jq -R .),
      digest: $( echo -n "sha256:$sha256" | jq -R . )
    }
  }" >&3
fi