#!/usr/bin/env bash
######################################################
# dev_setup.sh
# @author sean.fitzgerald (aka clusterfudge)
#
# The purpose of this script is to create a self-
# contained development environment using
# virtualenv for python dependency sandboxing.
# This script will create a virtualenv (using the
# conventions set by virtualenv-wrapper for
# location and naming) and install the requirements
# laid out in requirements.txt, pocketsphinx, and
# pygtk into the virtualenv. Mimic will be
# installed and built from source inside the local
# checkout.
#
# The goal of this script is to create a development
# environment in user space that is fully functional.
# It is expected (and even encouraged) for a developer
# to work on multiple projects concurrently, and a
# good OSS citizen respects that and does not pollute
# a developers workspace with it's own dependencies
# (as much as possible).
# </endRant>
######################################################

# exit on any error
set -Ee

if [ $(id -u) -eq 0 ]; then
  echo "This script should not be run as root or with sudo."
  exit 1
fi

# Configure to use the standard commit template for
# this repo only.
git config commit.template .gitmessage

TOP=$(cd $(dirname $0) && pwd -L)

if [ -z "$WORKON_HOME" ]; then
    VIRTUALENV_ROOT=${VIRTUALENV_ROOT:-"${HOME}/.virtualenvs/mycroft"}
else
    VIRTUALENV_ROOT="$WORKON_HOME/mycroft"
fi

# Check whether to build mimic (it takes a really long time!)
build_mimic='y'
if [[ "$1" == '-sm' ]] ; then
  build_mimic='n'
else
  # first, look for a build of mimic in the folder
  has_mimic=""
  if [[ -f ${TOP}/mimic/bin/mimic ]] ; then
      has_mimic=$( ${TOP}/mimic/bin/mimic -lv | grep Voice )
  fi

  # in not, check the system path
  if [ "$has_mimic" = "" ] ; then
    if [ -x "$(command -v mimic)" ]; then
      has_mimic="$( mimic -lv | grep Voice )"
    fi
  fi

  if ! [ "$has_mimic" == "" ] ; then
    echo "Mimic is installed. Press 'y' to rebuild mimic, any other key to skip."
    read -n1 build_mimic
  fi
fi

# create virtualenv, consistent with virtualenv-wrapper conventions
if [ ! -d "${VIRTUALENV_ROOT}" ]; then
   mkdir -p $(dirname "${VIRTUALENV_ROOT}")
  virtualenv -p python2.7 "${VIRTUALENV_ROOT}"
fi
source "${VIRTUALENV_ROOT}/bin/activate"
cd "${TOP}"
easy_install pip==7.1.2 # force version of pip
pip install --upgrade virtualenv

# Add mycroft-core to the virtualenv path
# (This is equivalent to typing 'add2virtualenv $TOP', except
# you can't invoke that shell function from inside a script)
VENV_PATH_FILE="${VIRTUALENV_ROOT}/lib/python2.7/site-packages/_virtualenv_path_extensions.pth"
if [ ! -f "$VENV_PATH_FILE" ] ; then
    echo "import sys; sys.__plen = len(sys.path)" > "$VENV_PATH_FILE" || return 1
    echo "import sys; new=sys.path[sys.__plen:]; del sys.path[sys.__plen:]; p=getattr(sys,'__egginsert',0); sys.path[p:p]=new; sys.__egginsert = p+len(new)" >> "$VENV_PATH_FILE" || return 1
fi

if ! grep -q "mycroft-core" $VENV_PATH_FILE; then
   echo "Adding mycroft-core to virtualenv path"
   sed -i.tmp '1 a\
'"$TOP"'
' "${VENV_PATH_FILE}"
fi

# install requirements (except pocketsphinx)
# removing the pip2 explicit usage here for consistency with the above use.

if ! pip install -r requirements.txt; then
    echo "Warning: Failed to install all requirements. Continue? y/N"
    read -n1 continue
    if [[ "$continue" != "y" ]] ; then
        exit 1
    fi
fi

SYSMEM=$(free|awk '/^Mem:/{print $2}')
MAXCORES=$(($SYSMEM / 512000))
CORES=$(nproc)

if [[ ${MAXCORES} -lt ${CORES} ]]; then
  CORES=${MAXCORES}
fi
echo "Building with $CORES cores."

#build and install pocketsphinx
#cd ${TOP}
#${TOP}/scripts/install-pocketsphinx.sh -q
#build and install mimic
cd "${TOP}"

if [[ "$build_mimic" == 'y' ]] || [[ "$build_mimic" == 'Y' ]]; then
  echo "WARNING: The following can take a long time to run!"
  "${TOP}/scripts/install-mimic.sh" " ${CORES}"
else
  echo "Skipping mimic build."
fi

# install pygtk for desktop_launcher skill
"${TOP}/scripts/install-pygtk.sh" " ${CORES}"

md5sum requirements.txt dev_setup.sh > .installed