#!/usr/bin/env bash

ABRA_VERSION="0.13.0-beta"
ABRA_RELEASE_URL="https://git.coopcloud.tech/api/v1/repos/toolshed/abra/releases/tags/$ABRA_VERSION"
RC_VERSION="0.13.0-beta"
RC_VERSION_URL="https://git.coopcloud.tech/api/v1/repos/toolshed/abra/releases/tags/$RC_VERSION"

for arg in "$@"; do
  if [ "$arg" == "--rc" ]; then
    ABRA_VERSION="$RC_VERSION"
    ABRA_RELEASE_URL="$RC_VERSION_URL"
  fi
done

function show_banner {
  echo ""
  echo "   ____                         ____ _                 _ "
  echo "  / ___|___       ___  _ __    / ___| | ___  _   _  __| |"
  echo " | |   / _ \ ___ / _ \| '_ \  | |   | |/ _ \| | | |/ _' |"
  echo " | |__| (_) |___| (_) | |_) | | |___| | (_) | |_| | (_| |"
  echo "  \____\___/     \___/| .__/   \____|_|\___/ \__,_|\__,_|"
  echo "                      |_|"
  echo ""
  echo ""
  echo "        === Public interest infrastructure ===           "
  echo ""
  echo ""
}

function print_checksum_error {
      echo "$(tput setaf 1)ERROR: the checksum of downloaded file doesn't match the checksum in release! Either the file was corrupted during download or the file has been changed during transport$(tput sgr0)"
      echo "expected checksum: $checksum"
      echo "checksum of downloaded file: $localsum"
      echo "abra was NOT installed/upgraded"
}

function install_abra_release {
  mkdir -p "$HOME/.local/bin"

  if ! type "wget" > /dev/null 2>&1; then
    echo "'wget' is not installed, cannot proceed..."
    echo "perhaps try installing manually via the releases URL?"
    echo "https://git.coopcloud.tech/toolshed/abra/releases"
    exit 1
  fi

  ARCH=$(uname -m)
  if [[ $ARCH =~ "x86_64" ]]; then
      ARCH="amd64"
  elif [[ $ARCH =~ "aarch64" ]]; then
      ARCH="arm64"
  elif [[ $ARCH =~ "armv5l" ]]; then
      ARCH="armv5"
  elif [[ $ARCH =~ "armv6l" ]]; then
      ARCH="armv6"
  elif [[ $ARCH =~ "armv7l" ]]; then
      ARCH="armv7"
  fi
  PLATFORM=$(uname -s | tr '[:upper:]' '[:lower:]')_$ARCH
  FILENAME="abra_"$ABRA_VERSION"_"$PLATFORM".tar.gz"
  sed_command_rel='s/.*"assets":\[\{[^]]*"name":"'$FILENAME'"[^}]*"browser_download_url":"([^"]*)".*\].*/\1/p'
  sed_command_checksums='s/.*"assets":\[\{[^\]*"name":"checksums.txt"[^}]*"browser_download_url":"([^"]*)".*\].*/\1/p'

  json=$(wget -q -O- $ABRA_RELEASE_URL)
  release_url=$(echo $json | sed -En $sed_command_rel)
  checksums_url=$(echo $json | sed -En $sed_command_checksums)

  checksums=$(wget -q -O- $checksums_url)
  checksum=$(echo "$checksums" | grep "$FILENAME" - | sed -En 's/([0-9a-f]{64})\s+'"$FILENAME"'.*/\1/p')
  abra_download="/tmp/abra-download.tar.gz"

  echo "downloading $ABRA_VERSION $PLATFORM binary release for abra..."

  wget -q "$release_url" -O $abra_download 
  localsum=$(sha256sum $abra_download | sed -En 's/([0-9a-f]{64})\s+.*/\1/p')
  echo "checking if checksums match..."
  if [[ "$localsum" != "$checksum" ]]; then
      print_checksum_error
      exit 1
  fi
  echo "$(tput setaf 2)check successful!$(tput sgr0)"
  cd /tmp/
  tar xf abra-download.tar.gz
  mv abra "$HOME/.local/bin/abra"
  tar tf abra-download.tar.gz | xargs rm -f
  chmod +x "$HOME/.local/bin/abra"

  x=$(echo $PATH | grep $HOME/.local/bin)
  if [ $? -ne 0 ]; then
      echo "$(tput setaf 3)WARNING: $HOME/.local/bin/ is not in \$PATH! If you want to run abra by just typing "abra" you should add it to your \$PATH! To do that run this once and restart your terminal:$(tput sgr0)"
      p=$HOME/.local/bin
      com='echo PATH="$PATH:'"$p"'"'
      if [[ $SHELL =~ "bash" ]]; then
          echo "$com >> $HOME/.bashrc"
      elif [[ $SHELL =~ "fizsh" ]]; then
          echo "$com >> $HOME/.fizsh/.fizshrc"
      elif [[ $SHELL =~ "zsh" ]]; then
          echo "$com >> $HOME/.zshrc"
      else
          echo "$com >> $HOME/.profile"
      fi
  fi

  echo "abra installed to $HOME/.local/bin/abra"
  echo "test your installation is working by running \"abra\" on your command-line"
  echo "run \"abra autocomplete -h\" to see how to set up command-line autocompletion"
}


function run_installation {
  show_banner
  install_abra_release
}

run_installation "$@"
exit 0