#! /usr/bin/env bash
# script to install the extra needed tools programmatically

# add command line flags and function to govern install?

MAMBAFORGE_RELEASE="https://github.com/conda-forge/miniforge/releases/latest/download/Mambaforge-Linux-x86_64.sh"
MAMBAFORGE_INSTALLER="Mambaforge-Linux-x86_64.sh"


help() {
  cat << EOF
extras downloaders

by default will download all packages listed below

usage: $0 [OPTIONS]

    --help               Show this message
    --force              Overwrite current installations

    To install a subset of these
    use any of the package specific flag:

    --fzf
    --nvm
    --mambaforge

EOF
}

for opt in "$@"; do
  case $opt in
    --help)
      help
      exit 0
      ;;
    --force) force=1 ;;
    --fzf) fzf=1 ;;
    --nvm) nvm=1 ;;
    --mambaforge) mamba=1 ;;
    *)
      echo "unknown option: $opt"
      help
      exit 1
      ;;
  esac
done


check_existing() {
    pkg=$1
    install_dir=$2
    declare -n skip_out=$3

    if [ -d "$install_dir" ]; then
        echo "found existing $pkg installation"
        if [[ "$force" ]]; then
            echo "removing previous installation"
            rm -rf $install_dir
            skip_out=0
        else
            skip_out=1
        fi
      else
        skip_out=0
    fi
}


ask() {
  while true; do
    read -p "$1 ([y]/n) " -r
    REPLY=${REPLY:-"y"}
    if [[ $REPLY =~ ^[Yy]$ ]]; then
      return 1
    elif [[ $REPLY =~ ^[Nn]$ ]]; then
      return 0
    fi
  done
}

install_fzf() {
    echo "##############"
    echo  installing fzf
    echo "##############"

    check_existing "fzf" "$HOME/.fzf" skip

    if [[ "$skip" -eq 1 ]];
        then
        echo "remove your previous installation or rerun with --force"
        return
    fi

    echo "installing fzf using git"

    git clone --depth 1 https://github.com/junegunn/fzf.git ~/.fzf
    ~/.fzf/install \
        --key-bindings \
        --completion \
        --no-bash \
        --no-zsh \
        --no-update-rc \


}
install_nvm() {
    echo "##############"
    echo  installing nvm
    echo "##############"

    check_existing "nvm" "$HOME/.nvm" skip

    if [[ "$skip" -eq 1 ]];
        then
        echo "remove your previous installation or rerun with --force"
        return
    fi

    local current_dir=$PWD

    git clone https://github.com/nvm-sh/nvm.git ~/.nvm
    cd ~/.nvm
    git checkout v0.39.0
    . ./nvm.sh

    cd $current_dir
}


install_mambaforge() {
    echo "#####################"
    echo  installing mambaforge
    echo "#####################"


    check_existing "mambaforge" "$HOME/mambaforge" skip

    if [[ "$skip" -eq 1 ]];
        then
        echo "remove your previous installation or rerun with --force"
        return
    fi

    echo "fetching install script from github"

    current_dir=$PWD

    cd ~/

    wget https://github.com/conda-forge/miniforge/releases/latest/download/Mambaforge-Linux-x86_64.sh
    bash "$MAMBAFORGE_INSTALLER" -s
    rm "$MAMBAFORGE_INSTALLER"

    echo "cleaning up installer"

    cd $current_dir
}



install_all() {
    echo "installing all packages..."
    echo
    install_fzf
    echo
    install_nvm
    echo
    install_mambaforge

}

# remove once functional
echo $@

echo "#################"
echo  EXTRAS DOWNLOADER
echo "#################"
echo

if [ $# -eq 0 ];
    then
    install_all
    exit
fi

if [ "$fzf" ]; then
    install_fzf
fi

if [ "$nvm" ]; then
    install_nvm
fi

if [ "$mamba" ];
    then install_mambaforge
fi


echo "FINISHED!"