#!/bin/bash

set -e -o pipefail

: "${REMOVE_OLD_MODS:=false}"
: "${MODS:=}"
: "${MODS_OUT_DIR:=/data/mods}"
: "${MODS_FILE:=}"
: "${PLUGINS:=}"
: "${PLUGINS_OUT_DIR:=/data/plugins}"
: "${PLUGINS_FILE:=}"
: "${REMOVE_OLD_MODS_DEPTH:=1} "
: "${REMOVE_OLD_MODS_INCLUDE:=*.jar,*-version.json}"
sum_file=/data/.generic_pack.sum

# shellcheck source=start-utils
. "${SCRIPTS:-/}start-utils"
isDebugging && set -x

#  CURSE_URL_BASE used in manifest downloads below
CURSE_URL_BASE=${CURSE_URL_BASE:-https://minecraft.curseforge.com/projects}

# Remove old mods/plugins
if isTrue "${REMOVE_OLD_MODS}" && [ -z "${MODS_FILE}" ]; then
  removeOldMods "$MODS_OUT_DIR"
  removeOldMods "$PLUGINS_OUT_DIR"
  rm -f "$sum_file"
fi

function handlePackwiz() {
  # If packwiz url passed, bootstrap packwiz and update mods before other modpack processing
  if [[ "${PACKWIZ_URL:-}" ]]; then
    if ! packwizInstaller=$(mc-image-helper maven-download \
                           --maven-repo=https://maven.packwiz.infra.link/repository/release/ \
                           --group=link.infra.packwiz --artifact=packwiz-installer --classifier=dist \
                           --skip-existing); then
      log "ERROR: failed to get packwiz installer"
      exit 1
    fi

    log "Running packwiz installer against URL: ${PACKWIZ_URL}"
    if ! java -cp "${packwizInstaller}" link.infra.packwiz.installer.Main -s server "${PACKWIZ_URL}"; then
      log "ERROR failed to run packwiz installer"
      exit 1
    fi
  fi
}

function handleModpackZip() {
# If supplied with a URL for a modpack (simple zip of jars), download it and unpack
if [[ "$MODPACK" ]]; then
  if isURL "${MODPACK}"; then
    log "Downloading mod/plugin pack"
    if ! get -o /tmp/modpack.zip "${MODPACK}"; then
      log "ERROR: failed to download from ${MODPACK}"
      exit 2
    fi
  elif [[ "$MODPACK" =~ .*\.zip ]]; then
    if ! cp "$MODPACK" /tmp/modpack.zip; then
      log "ERROR: failed to copy from $MODPACK"
      exit 2
    fi
  else
    log "ERROR Invalid URL or Path given for MODPACK: $MODPACK"
    exit 1
  fi

  if [ "$FAMILY" = "SPIGOT" ]; then
    mkdir -p "$PLUGINS_OUT_DIR"
    if ! unzip -o -d "$PLUGINS_OUT_DIR" /tmp/modpack.zip; then
      log "ERROR: failed to unzip the modpack from ${MODPACK}"
    fi
  else
    mkdir -p "$MODS_OUT_DIR"
    if ! unzip -o -d "$MODS_OUT_DIR" /tmp/modpack.zip; then
      log "ERROR: failed to unzip the modpack from ${MODPACK}"
    fi
  fi
  rm -f /tmp/modpack.zip
fi
}

function handleListings() {
  if usesMods && usesPlugins; then
      if [[ "$MODS" ]]; then

        ensureRemoveAllModsOff "MODS is set"

        mkdir -p "$MODS_OUT_DIR"
        mc-image-helper mcopy \
          --glob=*.jar \
          --scope=var-list \
          --to="$MODS_OUT_DIR" \
          "$MODS"
      fi
      if [[ "$PLUGINS" ]]; then
        ensureRemoveAllModsOff "PLUGINS is set"
        mkdir -p "$PLUGINS_OUT_DIR"
        mc-image-helper mcopy \
          --glob=*.jar \
          --scope=var-list \
          --to="$PLUGINS_OUT_DIR" \
          "$PLUGINS"
      fi

      if [[ "$MODS_FILE" ]]; then
        ensureRemoveAllModsOff "MODS_FILE is set"
        mkdir -p "$MODS_OUT_DIR"
        mc-image-helper mcopy \
          --file-is-listing \
          --scope=file-list \
          --to="$MODS_OUT_DIR" \
          "$MODS_FILE"
      fi
      if [[ "$PLUGINS_FILE" ]]; then
        ensureRemoveAllModsOff "PLUGINS_FILE is set"
        mkdir -p "$PLUGINS_OUT_DIR"
        mc-image-helper mcopy \
          --file-is-listing \
          --scope=file-list \
          --to="$PLUGINS_OUT_DIR" \
          "$PLUGINS_FILE"
      fi

  elif usesPlugins || usesMods; then
    outDir="$MODS_OUT_DIR"
    if usesPlugins; then
      outDir="$PLUGINS_OUT_DIR"
    fi

    if [[ "$MODS" || "$PLUGINS" ]]; then
      ensureRemoveAllModsOff "MODS or PLUGINS is set"
      mkdir -p "$outDir"
      mc-image-helper mcopy \
        --glob=*.jar \
        --scope=var-list \
        --to="$outDir" \
        "$MODS" "$PLUGINS"
    fi

    if [[ "$MODS_FILE" || "$PLUGINS_FILE" ]]; then
      ensureRemoveAllModsOff "MODS_FILE or PLUGINS_FILE is set"
      mkdir -p "$outDir"
      mc-image-helper mcopy \
        --file-is-listing \
        --scope=file-list \
        --to="$outDir" \
        "$MODS_FILE" "$PLUGINS_FILE"
    fi

  fi
}

function handleGenericPacks() {
  : "${GENERIC_PACKS:=${GENERIC_PACK}}"
  : "${GENERIC_PACKS_PREFIX:=}"
  : "${GENERIC_PACKS_SUFFIX:=}"

  if [[ "${GENERIC_PACKS}" ]]; then
    IFS=',' read -ra packs <<< "${GENERIC_PACKS}"

    packFiles=()
    for packEntry in "${packs[@]}"; do
      pack="${GENERIC_PACKS_PREFIX}${packEntry}${GENERIC_PACKS_SUFFIX}"
      if isURL "${pack}"; then
        mkdir -p /data/packs
        log "Downloading generic pack from $pack"
        if ! outfile=$(get -o /data/packs --output-filename --skip-up-to-date "$pack"); then
          log "ERROR: failed to download $pack"
          exit 2
        fi
        packFiles+=("$outfile")
      else
        packFiles+=("$pack")
      fi
    done

    isDebugging && [ -f "$sum_file}" ] && cat "$sum_file"

    log "Checking if generic packs are up to date"
    if isTrue "${SKIP_GENERIC_PACK_UPDATE_CHECK:-false}" && [ -f "$sum_file" ]; then
      log "Skipping generic pack update check"
    elif isTrue "${FORCE_GENERIC_PACK_UPDATE}" || ! checkSum "${sum_file}"; then
      log "Generic pack(s) are out of date. Re-applying..."

      original_base_dir=/data/.tmp/generic_pack_base
      base_dir=$original_base_dir
      rm -rf "${base_dir}"
      mkdir -p "${base_dir}"
      for pack in "${packFiles[@]}"; do
        isDebugging && ls -l "${pack}"
        extract "${pack}" "${base_dir}"
      done

      # Remove any eula file since container manages it
      rm -f "${base_dir}/eula.txt"

      # recalculate the actual base directory of content
      if ! base_dir=$(mc-image-helper find \
          --max-depth=3 --type=directory --name=mods,plugins,config \
          --only-shallowest --fail-no-matches --format '%h' \
          "$base_dir"); then
        log "ERROR: Unable to find content base of generic packs ${GENERIC_PACKS}. Directories:"
        mc-image-helper find --name=* --max-depth=3 --type=directory --format '- %P' "$original_base_dir"
        exit 1
      fi

      if [ -f /data/manifest.txt ]; then
        log "Manifest exists from older generic pack, cleaning up ..."
        while read -r f; do
          rm -rf "/data/${f}"
        done < /data/manifest.txt
        # prune empty dirs
        find /data -mindepth 1 -depth -type d -empty -delete
        rm -f /data/manifest.txt
      fi

      log "Writing generic pack manifest ... "
      find "${base_dir}" -type f -printf "%P\n" > /data/manifest.txt

      log "Applying generic pack ..."
      cp -R -f "${base_dir}"/* /data
      rm -rf $original_base_dir

      if isTrue "${SKIP_GENERIC_PACK_CHECKSUM:-false}"; then
        log "Skipping generic pack(s) checksum"
      else
        log "Saving generic pack(s) checksum"
        sha1sum "${packFiles[@]}" > "${sum_file}"
        if isDebugging; then
          cat "$sum_file"
        fi
      fi
    fi
  fi
}

function handleModrinthProjects() {
  : "${MODRINTH_PROJECTS:=}"
  : "${MODRINTH_ALLOWED_VERSION_TYPE:=release}"
  : "${MODRINTH_DOWNLOAD_DEPENDENCIES:=none}"
  if [[ -v MODRINTH_DOWNLOAD_OPTIONAL_DEPENDENCIES ]]; then
    log "WARNING The variable MODRINTH_DOWNLOAD_OPTIONAL_DEPENDENCIES is removed."
    log "        Use MODRINTH_DOWNLOAD_DEPENDENCIES=optional instead"
  fi

  if [[ $MODRINTH_PROJECTS ]] && isFamily HYBRID FORGE FABRIC SPIGOT; then
    if isFamily HYBRID; then
      loader=forge
    else
      loader="${TYPE,,}"
    fi
    mc-image-helper modrinth \
      --output-directory=/data \
      --projects="${MODRINTH_PROJECTS}" \
      --game-version="${VERSION}" \
      --loader="$loader" \
      --download-dependencies="$MODRINTH_DOWNLOAD_DEPENDENCIES" \
      --allowed-version-type="$MODRINTH_ALLOWED_VERSION_TYPE"
  fi
}

function handleCurseForgeFiles() {
  args=()
  if usesMods && ! usesPlugins; then
    args+=(--default-category mc-mods)
  elif usesPlugins && ! usesMods; then
    args+=(--default-category bukkit-plugins)
  fi

  case "${TYPE,,}" in
    forge|fabric|quilt)
      args+=(--mod-loader "$TYPE")
      ;;
    *)
      if isFamily HYBRID; then
        # To disambiguate mc-mods we'll assume that hybrid servers
        # are blending Forge (rather than Fabric or NeoForge)
        args+=(--mod-loader "forge")
      fi
      ;;
  esac

  # shellcheck disable=SC2086
  # since we want CURSEFORGE_FILES to expand
  mc-image-helper curseforge-files \
    "${args[@]}" \
    ${CURSEFORGE_FILES}
}

handlePackwiz

handleModpackZip

handleListings

if [[ $MANIFEST ]]; then
  log "ERROR: MANIFEST is no longer supported."
  log "       Use MOD_PLATFORM=AUTO_CURSEFORGE and CF_MODPACK_MANIFEST instead"
  exit 1
fi

if [[ $MODS_FORGEAPI_KEY || $MODS_FORGEAPI_FILE || $MODS_FORGEAPI_PROJECTIDS ]]; then
  log "ERROR the MODS_FORGEAPI_FILE / MODS_FORGEAPI_PROJECTIDS feature is no longer supported"
  log "      Use CURSEFORGE_FILES instead."
  exit 1
fi

handleGenericPacks

handleModrinthProjects

if usesMods || usesPlugins; then
  handleCurseForgeFiles
fi

# If supplied with a URL for a config (simple zip of configurations), download it and unpack
if [[ "$MODCONFIG" ]]; then
case "X$MODCONFIG" in
  X[Hh][Tt][Tt][Pp]*[Zz][iI][pP])
    log "Downloading mod/plugin configs via HTTP"
    log "  from $MODCONFIG ..."
    curl -sSL -o /tmp/modconfig.zip "$MODCONFIG"
    if [ "$FAMILY" = "SPIGOT" ]; then
      mkdir -p /data/plugins
      unzip -o -d /data/plugins /tmp/modconfig.zip
    else
      mkdir -p /data/config
      unzip -o -d /data/config /tmp/modconfig.zip
    fi
    rm -f /tmp/modconfig.zip
    ;;
  *)
    log "Invalid URL given for modconfig: Must be HTTP or HTTPS and a ZIP file"
    ;;
esac
fi

exec "${SCRIPTS:-/}start-setupMounts" "$@"