#!/usr/bin/env bash

rvm_base_except="selector"
source "$rvm_scripts_path/base"

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

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

record_md5() {
  if [[ "Darwin" = "$(uname)" ]] || [[ "FreeBSD" = "$(uname)" ]]; then
    archive_md5="$(/sbin/md5 -q "${archive}")"
  else
    archive_md5="$(md5sum "${archive}" | awk '{print $1}')"
  fi
  $rvm_scripts_path/db "$rvm_config_path/md5" "$archive" "$archive_md5"
}

builtin cd "$rvm_archives_path"

if [[ -z "$1" ]] ; then $rvm_scripts_path/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_scripts_path/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 [[ ! -z "$rvm_debug_flag" ]] ; then $rvm_scripts_path/log "debug" "Fetching $archive" ; fi

# Check first if we have the correct archive
archive_md5="$($rvm_scripts_path/db "$rvm_config_path/md5" "$archive" | head -n1)"
if [[ -e "$archive" ]] && [[ ! -z "$archive_md5" ]] ; then
  if [[ ! -z "$rvm_debug_flag" ]] ; then $rvm_scripts_path/log "debug" "Found archive and its md5, testing correctness" ; fi
  if ! $rvm_scripts_path/md5 "${rvm_archives_path}/${archive}" "$archive_md5" ; then
    if [[ ! -z "$rvm_debug_flag" ]] ; then $rvm_scripts_path/log "debug" "Archive is bad, downloading" ; fi
    download=1
  else
    if [[ ! -z "$rvm_debug_flag" ]] ; then $rvm_scripts_path/log "debug" "Archive is good, not downloading" ; fi
    download=0
    result=0
  fi ; unset archive_md5
else
  if [[ ! -z "$rvm_debug_flag" ]] ; then $rvm_scripts_path/log "debug" "No archive or no MD5, downloading" ; fi
  download=1
fi

if [[ $download -gt 0 ]] ; then
  rm -f $archive
  eval $fetch_command "$url"
  result=$?
  if [[ $result -gt 0 ]] ; then
    retry=0
    if [[ $result -eq 78 ]] ; then
      $rvm_scripts_path/log "error" "The requested url does not exist: '$url'"
    elif [[ $result -eq 18 ]] ; then
      $rvm_scripts_path/log "error" "Partial file. Only a part of the file was transferred. Removing partial and re-trying."
      rm -f "$archive"
      retry=1
    elif [[ $result -eq 33 ]] ; then
      if [[ ! -z "$rvm_debug_flag" ]] ; then $rvm_scripts_path/log "debug" "Server does not support 'range' command, removing '$archive'" ; fi
      rm -f "$archive"
      retry=1
    else
      $rvm_scripts_path/log "error" "There was an error, please check $rvm_ruby_log_path/*.error.log"
    fi

    if [[ $retry -eq 1 ]] ; then
      eval $fetch_command "$url"
      result=$?
      if [[ $result -gt 0 ]] ; then
        $rvm_scripts_path/log "error" "There was an error, please check $rvm_ruby_log_path/*.error.log"
      else
        record_md5
      fi
    fi
  else
    record_md5
  fi
fi
exit $result