#!/bin/bash

set -e -o pipefail

: "${REMOVE_OLD_MODS:=false}"
: "${MODS_FILE:=}"
: "${REMOVE_OLD_MODS_DEPTH:=1} "
: "${REMOVE_OLD_MODS_INCLUDE:=*.jar}"

# 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 /data/mods
  removeOldMods /data/plugins
fi

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

elif [[ "$MODS" ]]; then
  if [ "$TYPE" = "SPIGOT" ]; then
    out_dir=/data/plugins
  else
    out_dir=/data/mods
  fi
  mkdir -p "$out_dir"

  for i in ${MODS//,/ }
  do
    if isURL "$i"; then
      log "Downloading mod/plugin $i ..."
      if ! get -o "${out_dir}" "$i"; then
        log "ERROR: failed to download from $i into $out_dir"
        exit 2
      fi
    elif [[ -f "$i" && "$i" =~ .*\.jar ]]; then
      log "Copying plugin located at $i ..."
      out_file=$(basename "$i")
      if ! cp "$i" "${out_dir}/$out_file"; then
        log "ERROR: failed to copy from $i into $out_dir"
        exit 2
      fi
    elif [[ -d "$i" ]]; then
      log "Copying plugin jars from $i ..."
      cp "$i"/*.jar "${out_dir}"
    else
      log "ERROR Invalid URL or path given in MODS: $i"
      exit 2
    fi
  done

elif [[ "$MODS_FILE" ]]; then
  if [ ! -f "$MODS_FILE" ]; then
    log "ERROR: given MODS_FILE file does not exist"
    exit 2
  fi

  if [ "$TYPE" = "SPIGOT" ]; then
    out_dir=/data/plugins
  else
    out_dir=/data/mods
  fi
  mkdir -p "$out_dir"

  args=(
    -o "${out_dir}"
    --log-progress-each
    --skip-existing
    --uris-file "${MODS_FILE}"
  )
  if isTrue "${REMOVE_OLD_MODS}"; then
    args+=(
    --prune-others "${REMOVE_OLD_MODS_INCLUDE}"
    --prune-depth "${REMOVE_OLD_MODS_DEPTH}"
    )
  fi

  if ! get "${args[@]}" ; then
    log "ERROR: failed to retrieve one or more mods"
    exit 1
  fi
fi

if [[ "$MANIFEST" ]]; then
    if [[ -e "$MANIFEST" ]]; then
        EFFECTIVE_MANIFEST_FILE=$MANIFEST
    elif isURL "$MANIFEST"; then
        EFFECTIVE_MANIFEST_FILE=/tmp/manifest.json
        EFFECTIVE_MANIFEST_URL=$(curl -Ls -o /dev/null -w %{effective_url} $MANIFEST)
        curl -Ls -o $EFFECTIVE_MANIFEST_FILE "$EFFECTIVE_MANIFEST_URL"
    else
        log "MANIFEST='$MANIFEST' is not a valid manifest url or location"
        exit 2
    fi

case "X$EFFECTIVE_MANIFEST_FILE" in
  X*.json)
    if [ -f "${EFFECTIVE_MANIFEST_FILE}" ]; then
      MOD_DIR=${FTB_BASE_DIR:-/data}/mods
      if [ ! -d "$MOD_DIR" ]
      then
        log "Creating mods dir $MOD_DIR"
        mkdir -p "$MOD_DIR"
      fi
      log "Starting manifest download..."
      cat "${EFFECTIVE_MANIFEST_FILE}" | jq -r '.files[] | (.projectID|tostring) + " " + (.fileID|tostring)'| while read -r p f
      do
        if [ ! -f $MOD_DIR/${p}_${f}.jar ]
        then
          redirect_url="$(curl -Ls -o /dev/null -w %{effective_url} ${CURSE_URL_BASE}/${p})"
          url="$redirect_url/download/${f}/file"
          log Downloading curseforge mod $url
          #  Manifest usually doesn't have mod names. Using id should be fine, tho
          curl -sSL "${url}" -o $MOD_DIR/${p}_${f}.jar
        fi
      done
    else
      log "Could not find manifest file, insufficient privileges, or malformed path."
    fi
    ;;
  *)
    log "Invalid manifest file for modpack. Please make sure it is a .json file."
    ;;
esac
fi

: "${GENERIC_PACKS:=${GENERIC_PACK}}"

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

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

  sum_file=/data/.generic_pack.sum
  isDebugging && [ -f "$sum_file}" ] && cat "$sum_file"
  if ! sha256sum -c "${sum_file}" --status 2> /dev/null; then
    base_dir=/tmp/generic_pack_base
    mkdir -p ${base_dir}
    for pack in "${packFiles[@]}"; do
      isDebugging && ls -l "${pack}"
      unzip -q -d ${base_dir} "${pack}"
    done

    # recalculate the actual base directory of content
    base_dir=$(find "$base_dir" -type d \( -name mods -o -name plugins -o -name config \) -printf '%h' -quit)
    if [[ ! $base_dir ]]; then
      log "ERROR: Unable to find content base of generic packs ${GENERIC_PACKS}. Directories:"
      find /tmp/generic_pack_base -type d -printf '  - %P\n'
      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 /tmp/generic_pack_base

    sha256sum "${packFiles[@]}" > "${sum_file}"
    isDebugging && cat "$sum_file"
  fi
fi

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