#!/usr/bin/env bash
#
# This script downloads and installs the Flow123d
# inspired by https://get.fenicsproject.org/

# Setup
RED="\033[1;31m"
BLUE="\033[1;34m"
GREEN="\033[1;32m"
YELLOW="\033[1;33m"
NORMAL="\033[0m"

DEST_DIR="$HOME/.local/bin"
DEST=$DEST_DIR/flow123d
mkdir -p $DEST_DIR

# Check if we have Docker
TMP=$(docker -v 2>/dev/null)
if [ ! $? -eq 0 ]; then
  echo -e "It appears that ${RED}Docker is not installed${NORMAL} on your system."
  echo "Follow these instructions to install Docker, then come back and try again:"
  echo ""
  echo "  https://docs.docker.com/get-started/"
  echo ""
  exit 1
else
  echo -e "You have docker version ${GREEN}$TMP${NORMAL} on your system."
fi

# download simple version of flow123d
curl -s https://flow.nti.tul.cz/flow123d > $DEST_DIR/flow123d
curl -s https://flow.nti.tul.cz/fterm > $DEST_DIR/fterm
chmod a+rx $DEST_DIR/flow123d
chmod a+rx $DEST_DIR/fterm

inPath=$(which flow123d)
if [[ -z "$inPath" ]]; then
  cmd_prefix=$DEST_DIR/
else
  cmd_prefix=
fi



# quick start info
echo -e "------------------------"
echo -e "OK, scripts ${GREEN}flow123d${NORMAL} and ${GREEN}fterm${NORMAL} installed into ${BLUE}$DEST_DIR${NORMAL}"
echo -e "To get started, run the commands"
echo -e ""
echo -e "  ${BLUE}${cmd_prefix}flow123d${NORMAL} or ${BLUE}${cmd_prefix}fterm${NORMAL}"
echo -e ""
echo -e "To enter interactive terminal use ${GREEN}fterm${NORMAL} (you can access flow123d inside)"
echo -e "To actually run flow123d, use ${GREEN}flow123d${NORMAL}"
echo -e "Take a look at help page if you want to know more:"
echo -e ""
echo -e "  ${BLUE}${cmd_prefix}fterm --help${NORMAL}"
echo -e ""

if [[ -z "$inPath" ]]; then
  echo -e "------------------------"
  echo -e "Also, it appears that your ${YELLOW}\$PATH${NORMAL} variable does not include ${BLUE}$DEST_DIR${NORMAL} (which usually does)"
  echo -e "Add the following line to your ${BLUE}$HOME/.bashrc${NORMAL} file:"
  echo -e ""
  echo -e "  ${YELLOW}export PATH=$DEST_DIR:\$PATH"${NORMAL}
  echo -e ""
  echo -e "And after you login, you won't have to type entire path"
  echo -e "You can simple type ${GREEN}flow123d${NORMAL} or ${GREEN}fterm${NORMAL}"
fi