#!/usr/bin/env bash

rvm_base_except="selector"

source "$rvm_path/scripts/base"

result=0

# Set it to cleanup the download on interruption.
trap 'cleanup_download' 1 2 3 15

cleanup_download()
{
  [[ -f "$archive" ]] && rm -f "$archive"
}

record_md5()
{
  if [[ "Darwin" = "$(uname)" ]] || [[ "FreeBSD" = "$(uname)" ]]; then

    archive_md5="$(/sbin/md5 -q "${archive}")"

  else

    archive_md5="$(md5sum "${archive}" | awk '{print $1}')"

  fi

  "$rvm_path/scripts/db" "$rvm_path/config/md5" "$archive" "$archive_md5"

}

builtin cd "${rvm_archives_path:-"$rvm_path/archives"}"

# args=($*) # Reserved for future use

if [[ -z "$1" ]] ; then

  "$rvm_path/scripts/log" "fail" \
    "BUG: $0 called without an argument :/"

  exit 1
fi

url="$1"; download=1 ; package_name="$2"

if ! command -v curl > /dev/null ; then

  "$rvm_path/scripts/log" "fail" \
    "rvm requires curl. curl was not found in your active path."

  exit 1

elif [[ ! -z ${rvm_proxy} ]] ; then

  fetch_command="curl -x${rvm_proxy} -L --create-dirs -C - " # -s for silent

else

  fetch_command="curl -L --create-dirs -C - " # -s for silent

fi

if [[ ! -z "$package_name" ]] ; then

  fetch_command="${fetch_command} -o ${package_name} "

  archive="$package_name"

else

  fetch_command="${fetch_command} -O "

  archive=$(basename "$url")

fi

if [[ ${rvm_debug_flag:-0} -gt 0 ]] ; then

  "$rvm_path/scripts/log" "debug" \
    "Fetching $archive"

fi

# Check first if we have the correct archive
archive_md5="$("$rvm_path/scripts/db" "$rvm_path/config/md5" "$archive" | head -n1)"

if [[ -e "$archive" && ! -z "$archive_md5" ]] ; then

  if [[ ${rvm_debug_flag:-0} -gt 0 ]] ; then

    "$rvm_path/scripts/log" "debug" \
    "Found archive and its md5, testing correctness"

  fi

  if ! "$rvm_path/scripts"/md5 "${rvm_archives_path:-"$rvm_path/archives"}/${archive}" "$archive_md5" ; then

    if [[ ${rvm_debug_flag:-0} -gt 0 ]] ; then
      "$rvm_path/scripts/log" "debug" \
        "Archive md5 did not match, downloading"
    fi

    download=1

  else

    if [[ ${rvm_debug_flag:-0} -gt 0 ]] ; then

      "$rvm_path/scripts/log" "debug" \
        "Archive md5 matched, not downloading"

    fi

    download=0

    result=0

  fi

else

  if [[ ${rvm_debug_flag:-0} -gt 0 ]] ; then

    "$rvm_path/scripts/log" "debug" \
      "No archive or no MD5, downloading"

  fi

  download=1

fi

# try to convert the ftp url to a http url
http_url="$(echo "$url" | sed -e 's/ftp:/http:/' -e 's/git:/http:/')"

if [[ $download -gt 0 ]] ; then

  rm -f $archive

  eval $fetch_command "$url" ; result=$?

  if [[ $result -gt 0 ]] ; then

    retry=0

    try_http=0

    if [[ $result -eq 78 ]] ; then

      "$rvm_path/scripts/log" "error" \
        "The requested url does not exist: '$url'"

      try_http=1

    elif [[ $result -eq 18 ]] ; then

      "$rvm_path/scripts/log" "error" \
        "Partial file. Only a part of the file was transferred. Removing partial and re-trying."

      rm -f "$archive"

      retry=1

    elif [[ $result -eq 33 ]] ; then

      if [[ ${rvm_debug_flag:-0} -gt 0 ]] ; then

        "$rvm_path/scripts/log" "debug" \
        "Server does not support 'range' command, removing '$archive'"

      fi

      rm -f "$archive"

      retry=1

    else

      "$rvm_path/scripts/log" "error" \
        "There was an error, please check ${rvm_log_path:-"$rvm_path/log"}/$rvm_ruby_string/*.log. Next we'll try to fetch via http."

      try_http=1

    fi

    if [[ $retry -eq 1 ]] ; then

      eval $fetch_command "$url" ; result=$?

      if [[ $result -gt 0 ]] ; then

        "$rvm_path/scripts/log" "error" \
          "There was an error, please check ${rvm_log_path:-"$rvm_path/log"}/$rvm_ruby_string/*.log"

      else

        record_md5

      fi

    fi

    if [[ $try_http -eq 1 ]] ; then

      eval $fetch_command "$http_url" ; result=$?

      if [[ $result -gt 0 ]] ; then

        "$rvm_path/scripts/log" "error" \
          "There was an error, please check ${rvm_log_path:-"$rvm_path/log"}/$rvm_ruby_string/*.log"

      else

        record_md5

      fi

    fi

  else

    record_md5

  fi

fi

exit $result