#!/bin/bash

config_dir="$HOME/.config/smm2"
bp_dir="${config_dir}/blueprints" && mkdir -p "$bp_dir"
cache_dir="$HOME/.cache/smm2" && mkdir -p "$cache_dir"

#parse flags
while getopts 'uhYy' flag; do
  case "${flag}" in
    [Yy] )  proceed="YES";;
    [u] )   option_useronly=1;;
    * )     echo "usage coming soon"; exit 1 ;;
  esac
done
shift $((OPTIND-1))

echo "Warning!"
echo "This process might take a long time!"
echo "This program has the potential to be VERY dangerous!"
echo "Please be sure you know what the scripts in ~/.config/smm2/blueprints/ do"
echo "You are solely responsible for any issues you may experience!"
while [ "$proceed" != "YES" ];do
  read -p "type 'yes' in all caps to proceed: " proceed
done

#parse args
if [[ $# -eq 0 ]];then
  target=($(ls ${bp_dir}))
else
  target=()
  for a in $@;do
    target+=("${a}")
  done
fi

#validate blueprints
echo "checking configuration..."
for d in "${target[@]}";do
  bp_path="${bp_dir}/${d}"
  if [ -d "${bp_path}" ];then
    echo "~/.config/smm2/blueprints/${d} exists, continuing"
  else
    echo "ERROR: ~/.config/smm2/blueprints/${d} does not exist or is not a directory, aborting"
    exit 1
  fi
  if [ -f "${bp_path}/install.sh" ];then
    echo "${d}/install.sh exists, continuing"
  else
    echo "ERROR: ${d}/install.sh does not exist or is not a file, aborting"
    exit 1
  fi
done

#check dependencies before attempting to build
for d in "${target[@]}";do
  bp_path="${bp_dir}/${d}"
  if [ -f "${bp_path}/deps" ]; then
    dpkg-query -W --showformat='${db:Status-Status}\n' $(cat ${bp_path}/deps) 2>&1 | grep -v "^installed$";depsfulfilled="$?"
    if [[ "${depsfulfilled}" -eq 0 ]];then
      echo "One or more dependency is missing."
      while true;do
        read -p "Attempt to install them now? (y/N) " installdeps
        case "${installdeps}" in
          [Yy] )
            installdeps=y;
            check_root=$(sudo whoami)
            [ "$check_root" != "root" ] && echo "unable to achieve root privileges" && exit 1
            break;;
          [Nn] )
            exit 1;;
        esac
      done
      sudo apt-get install $(cat "${bp_path}/deps")
    fi
  fi
done

#build package
for d in "${target[@]}";do

  bp_path="${bp_dir}/${d}"
  build_path="${cache_dir}/${d}"

  requires_sudo=""
  source "${bp_path}/config"

  grep -q 'sudo' "${bp_path}/install.sh" && [ "${requires_sudo}" != "0" ] && sudo_check=0

  if [ "$sudo_check" = "0" ] || [ "${requires_sudo}" = "1" ]; then
    [ "$option_useronly" = "1" ] && echo "ignoring sudo installs" && break
    check_root=$(sudo whoami)
    [ "$check_root" != "root" ] && echo "unable to achieve root privileges" && break
  fi

  mkdir -p "${build_path}"
  cd "${build_path}"
  "${bp_path}/install.sh"
  cd "${cache_dir}"
  rm -rf "${build_path}"

done