#!/bin/bash
set -e
. functions.sh

hash git 2>/dev/null || { echo >&2 "git not found, exiting."; }

# Used dynamically: print "$array_" $1
# shellcheck disable=SC2034
array_6='6 boron'
# shellcheck disable=SC2034
array_8='8 carbon'
# shellcheck disable=SC2034
array_9='9'
# shellcheck disable=SC2034
array_10='10 latest'
# shellcheck disable=SC2034
array_chakracore_8='chakracore-8'
# shellcheck disable=SC2034
array_chakracore_10='chakracore-10 chakracore'

cd "$(cd "${0%/*}" && pwd -P)"

self="$(basename "${BASH_SOURCE[0]}")"

IFS=' ' read -ra versions <<<"$(get_versions)"
IFS=' ' read -ra versions <<<"$(sort_versions "${versions[@]}")"
url='https://github.com/nodejs/docker-node'

# get the most recent commit which modified any of "$@"
fileCommit() {
  git log -1 --format='format:%H' HEAD -- "$@"
}

echo "# this file is generated via ${url}/blob/$(fileCommit "$self")/$self"
echo
echo "Maintainers: The Node.js Docker Team <${url}> (@nodejs)"
echo "GitRepo: ${url}.git"
echo

# prints "$2$1$3$1...$N"
join() {
  local sep="$1"
  shift
  local out
  printf -v out "${sep//%/%%}%s" "$@"
  echo "${out#$sep}"
}

get_stub() {
  local version="$1"
  shift
  IFS='/' read -ra versionparts <<<"$version"
  local stub
  eval stub="$(join '_' "${versionparts[@]}" | awk -F. '{ print "$array_" $1 }')"
  echo "$stub"
}

for version in "${versions[@]}"; do
  # Skip "docs" and other non-docker directories
  [ -f "$version/Dockerfile" ] || continue

  stub=$(get_stub "$version")
  commit="$(fileCommit "$version")"
  fullVersion="$(get_tag "$version" full)"
  majorMinorVersion="$(get_tag "$version" majorminor)"

  IFS=' ' read -ra versionAliases <<<"$fullVersion $majorMinorVersion $stub"
  # Get supported architectures for a specific version. See details in function.sh
  IFS=' ' read -ra supportedArches <<<"$(get_supported_arches "$version" "default")"

  echo "Tags: $(join ', ' "${versionAliases[@]}")"
  echo "Architectures: $(join ', ' "${supportedArches[@]}")"
  echo "GitCommit: ${commit}"
  echo "Directory: ${version}"
  echo

  # Get supported variants according to the target architecture.
  # See details in function.sh
  IFS=' ' read -ra variants <<<"$(get_variants "$(dirname "$version")")"
  for variant in "${variants[@]}"; do
    # Skip non-docker directories
    [ -f "$version/$variant/Dockerfile" ] || continue

    commit="$(fileCommit "$version/$variant")"

    slash='/'
    variantAliases=("${versionAliases[@]/%/-${variant//$slash/-}}")
    variantAliases=("${variantAliases[@]//latest-/}")
    # Get supported architectures for a specific version and variant.
    # See details in function.sh
    IFS=' ' read -ra supportedArches <<<"$(get_supported_arches "$version" "$variant")"

    echo "Tags: $(join ', ' "${variantAliases[@]}")"
    echo "Architectures: $(join ', ' "${supportedArches[@]}")"
    echo "GitCommit: ${commit}"
    echo "Directory: ${version}/${variant}"
    echo
  done
done