#!/usr/bin/env bash
# author: deadc0de6 (https://github.com/deadc0de6)
# Copyright (c) 2017, deadc0de6
#
# test diff cmd
# returns 1 in case of error
#

# exit on first error
set -e

# all this crap to get current path
rl="readlink -f"
if ! ${rl} "${0}" >/dev/null 2>&1; then
  rl="realpath"

  if ! hash ${rl}; then
    echo "\"${rl}\" not found !" && exit 1
  fi
fi
cur=$(dirname "$(${rl} "${0}")")

#hash dotdrop >/dev/null 2>&1
#[ "$?" != "0" ] && echo "install dotdrop to run tests" && exit 1

#echo "called with ${1}"

# dotdrop path can be pass as argument
ddpath="${cur}/../"
[ "${1}" != "" ] && ddpath="${1}"
[ ! -d "${ddpath}" ] && echo "ddpath \"${ddpath}\" is not a directory" && exit 1

export PYTHONPATH="${ddpath}:${PYTHONPATH}"
bin="python3 -m dotdrop.dotdrop"
if hash coverage 2>/dev/null; then
  bin="coverage run -a --source=dotdrop -m dotdrop.dotdrop"
fi

echo "dotdrop path: ${ddpath}"
echo "pythonpath: ${PYTHONPATH}"

# get the helpers
# shellcheck source=tests-ng/helpers
source "${cur}"/helpers

echo -e "$(tput setaf 6)==> RUNNING $(basename "${BASH_SOURCE[0]}") <==$(tput sgr0)"

################################################################
# this is the test
################################################################

# dotdrop directory
basedir=$(mktemp -d --suffix='-dotdrop-tests' || mktemp -d)
echo "[+] dotdrop dir: ${basedir}"
echo "[+] dotpath dir: ${basedir}/dotfiles"

# the dotfile to be imported
tmpd=$(mktemp -d --suffix='-dotdrop-tests' || mktemp -d)

clear_on_exit "${basedir}"
clear_on_exit "${tmpd}"

# some files
echo "original" > "${tmpd}"/singlefile

# create the config file
cfg="${basedir}/config.yaml"
cat > "${cfg}" << _EOF
config:
  backup: true
  create: true
  dotpath: dotfiles
dotfiles:
profiles:
_EOF

# import
echo "[+] import"
cd "${ddpath}" | ${bin} import -f -c "${cfg}" "${tmpd}"/singlefile

# modify the file
echo "modified" > "${tmpd}"/singlefile

# default diff (unified)
echo "[+] comparing with default diff (unified)"
set +e
cd "${ddpath}" | ${bin} compare -b -c "${cfg}" 2>/dev/null | grep -v '=>' | grep -v '\->' | grep -v 'dotfile(s) compared' | sed '$d' | grep -v '^+++\|^---' > "${tmpd}"/normal
diff -u -r "${tmpd}"/singlefile "${basedir}"/dotfiles/"${tmpd}"/singlefile | grep -v '^+++\|^---' > "${tmpd}"/real
set -e

# verify
diff "${tmpd}"/normal "${tmpd}"/real || exit 1

# adding normal diff
cfg2="${basedir}/config2.yaml"
sed '/dotpath: dotfiles/a \ \ diff_command: "diff -r {0} {1}"' "${cfg}" > "${cfg2}"
#cat ${cfg2}

# normal diff
echo "[+] comparing with normal diff"
set +e
cd "${ddpath}" | ${bin} compare -b -c "${cfg2}" 2>/dev/null | grep -v '=>' | grep -v '\->' | grep -v 'dotfile(s) compared' | sed '$d' > "${tmpd}"/unified
diff -r "${tmpd}"/singlefile "${basedir}"/dotfiles/"${tmpd}"/singlefile > "${tmpd}"/real
set -e

# verify
#cat ${tmpd}/unified
#cat ${tmpd}/real
diff "${tmpd}"/unified "${tmpd}"/real || exit 1

# adding fake diff
cfg3="${basedir}/config3.yaml"
sed '/dotpath: dotfiles/a \ \ diff_command: "echo fakediff"' "${cfg}" > "${cfg3}"
#cat ${cfg3}

# fake diff
echo "[+] comparing with fake diff"
set +e
cd "${ddpath}" | ${bin} compare -b -c "${cfg3}" 2>/dev/null | grep -v '=>' | grep -v '\->' | grep -v 'dotfile(s) compared' | sed '$d' > "${tmpd}"/fake
set -e

# verify
#cat ${tmpd}/fake
grep fakediff "${tmpd}"/fake &> /dev/null || exit 1

echo "OK"
exit 0