#!/bin/bash

rclone_install () {

local INSTALL_DIR="/opt"
local BIN_DIR="/opt/bin"
local FORCE=false
local VERSION=current

declare OPTION
declare OPTARG
declare OPTIND

while getopts 'i:b:v:f' OPTION; do
  case "$OPTION" in
    i)
      INSTALL_DIR=$OPTARG
      ;;
    b)
      BIN_DIR=$OPTARG
      ;;

    v)
      echo "Installing Beta"
      VERSION=$OPTARG
      ;;
    f)
      echo "FORCING download/overwrite"
      FORCE=true
      ;;
  esac
done

shift $(( OPTIND - 1 ))

# error codes
# 0 - exited without problems
# 1 - parameters not supported were used or some unexpected error occurred
# 2 - OS or Architecture not supported by this script
# 3 - installed version of rclone is up to date
# 4 - supported unzip tools are not available
# 5 - unable to install without sudo permission

[[ ! -w "$INSTALL_DIR" ]] && echo $INSTALL is not writable by user $USER, can\'t install there && exit 5
[[ ! -w "$BIN_DIR" ]] && echo $BIN_DIR is not writable by user $USER, won\'t be able to link binary there && exit 5
INSTALL_DIR=$INSTALL_DIR/rclone
# if [[ $EUID != 0 ]]; then
#     sudo "$0" "$@"
#     exit $?
# fi

#detect the platform
set +e

OS="`uname`"
case $OS in
  Linux)
    OS='linux'
    ;;
  *)
    echo 'Only Linux OS not supported by this script'
    exit 2
    ;;
esac

OS_type="`uname -m`"
case $OS_type in
  x86_64|amd64)
    OS_type='amd64'
    ;;
  i?86|x86)
    OS_type='386'
    ;;
  arm*)
    OS_type='arm'
    ;;
  aarch64)
    OS_type='arm64'
    ;;
  *)
    echo 'OS architecture not supported'
    exit 2
    ;;
esac

set -e

#when adding a tool to the list make sure to also add its corresponding command further in the script

# exit if no unzip tools available
[[ -z "unzip" ]] && printf "Please install unzip and try again.\n\n" && exit 4

# Make sure we don't create a root owned .config/rclone directory #2127
# export XDG_CONFIG_HOME=config

#check installed version of rclone to determine if update is necessary
# installed_version=`rclone --version 2>>errors | head -n 1`
# if [ -z "${install_beta}" ]; then
#     current_version=`curl https://downloads.rclone.org/version.txt`
# else
#     current_version=`curl https://beta.rclone.org/version.txt`
# fi
#
# if [ "$version" = "$current_version" ]; then
#     printf "\nThe latest ${install_beta}version of rclone ${version} is already installed.\n\n"
#     exit 3
# fi

echo  Installing to $INSTALL_DIR
mkdir -p $INSTALL_DIR
cd $INSTALL_DIR

# mv rclone.bin rclone.bin.prev

#create tmp directory and move to it with macOS compatibility fallback
# mkdir $INSTALL_DIR/zip
# $(mktemp -d -f rclone-zip)
# cd $zip_dir

# echo made temp
#download and unzip
if [[ $VERSION = "current" ]]; then
    download_link="https://downloads.rclone.org/rclone-current-$OS-$OS_type.zip"
    rclone_zip="rclone-current-$OS-$OS_type.zip"
else
    download_link="https://beta.rclone.org/rclone-beta-latest-$OS-$OS_type.zip"
    rclone_zip="rclone-beta-latest-$OS-$OS_type.zip"
fi

echo downloading rclone binary archive $download_link
# curl -O $download_link
echo expanding archive
unzip -j -o -a $rclone_zip
mkdir -p $INSTALL_DIR/docs 2> /dev/null || true
rm $INSTALL_DIR/docs/*.* 2> /dev/null || true
echo moving documentation files to docs/
mv  *.1 *.txt README.* $INSTALL_DIR/docs/ 2> /dev/null || true
# rm *.zip
echo preparing customized rclone command
rm -rf rclone.bin
mv rclone rclone.bin
chown :sudo rclone.bin
chmod 775 rclone.bin
touch $INSTALL_DIR/rclone
touch $INSTALL_DIR/rclone.conf
mkdir $INSTALL_DIR/cache 2> /dev/null || true
echo '#!/bin/bash' > $INSTALL_DIR/rclone
CMD=$(echo $INSTALL_DIR/rclone.bin \
    --config=$INSTALL_DIR/rclone.conf \
    --cache-dir=$INSTALL_DIR/cache \
    '$@' \
    )
echo "$CMD" >> $INSTALL_DIR/rclone
chown :sudo rclone
chmod 775 rclone
rm $BIN_DIR/rclone
ln -s $INSTALL_DIR/rclone $BIN_DIR/rclone
echo -e "rclone customized command can be launched from echo where: $(command -v rclone) \n $CMD"
cd ..




#update version variable post install
version=`rclone --version 2>>errors | head -n 1`

printf "\n${version} has successfully installed."
printf '\nNow run "rclone config" for setup. Check https://rclone.org/docs/ for more details.\n\n'
exit 0

}