#!/bin/sh

NVM_TEST_DIR=''
NVM_PROFILE_PATH=''

die () { echo "$@" ; cleanup ; exit 1; }

cleanup() {
  if [ -n "${NVM_TEST_DIR}" ] && [ -d "${NVM_TEST_DIR}" ]; then
    rm -rf "${NVM_TEST_DIR}"
  fi
  unset -f install_nvm_from_git install_nvm_as_script nvm_detect_profile nvm_has
  unset -f setup cleanup die make_profile run_install
  unset NVM_ENV METHOD PROFILE NVM_DIR NVM_TEST_DIR NVM_PROFILE_PATH
}

setup() {
  NVM_ENV=testing \. ../../install.sh

  # Mock installation functions to do nothing
  install_nvm_from_git() { :; }
  install_nvm_as_script() { :; }

  # Mock nvm_has to return true for git (to take the git path)
  nvm_has() {
    case "$1" in
      git) return 0 ;;
      *) return 1 ;;
    esac
  }

  # Mock nvm_detect_profile to point at the profile under test
  nvm_detect_profile() {
    nvm_echo "${NVM_PROFILE_PATH}"
  }
}

make_profile() {
  printf '%s\n' "$@" > "${NVM_PROFILE_PATH}"
}

run_install() {
  PROFILE='' METHOD='' NVM_DIR="${NVM_TEST_DIR}/nvm" nvm_do_install 2>&1
}

setup

NVM_TEST_DIR="$(mktemp -d)" || die 'unable to make the test dir'
mkdir -p "${NVM_TEST_DIR}/nvm" || die 'unable to make the install dir'
touch "${NVM_TEST_DIR}/nvm/nvm.sh" || die 'unable to make an empty nvm.sh'
NVM_PROFILE_PATH="${NVM_TEST_DIR}/.bashrc"

#
# Test: a commented-out nvm.sh line does not load nvm, so the source string is still appended
#

make_profile 'export NVM_DIR="$HOME/.nvm"' '# [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm' '  # [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"'
OUTPUT="$(run_install)"
case "${OUTPUT}" in
  *"Appending nvm source string"*) ;;
  *) die "a commented-out nvm.sh line should not count as the source string; got: ${OUTPUT}" ;;
esac
grep -q '^\[ -s "$NVM_DIR/nvm.sh"' "${NVM_PROFILE_PATH}" || die "the source string was not appended to the profile: $(cat "${NVM_PROFILE_PATH}")"

#
# Test: the same for a commented-out bash_completion line in a bash profile
#

make_profile '[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm' '# [ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion'
OUTPUT="$(run_install)"
case "${OUTPUT}" in
  *"nvm source string already in"*) ;;
  *) die "an active nvm.sh line should still count as the source string; got: ${OUTPUT}" ;;
esac
case "${OUTPUT}" in
  *"Appending bash_completion source string"*) ;;
  *) die "a commented-out bash_completion line should not count; got: ${OUTPUT}" ;;
esac

#
# Test: with both lines active, the profile is left alone
#

make_profile 'export NVM_DIR="$HOME/.nvm"' '[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm' '[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion'
BEFORE="$(cat "${NVM_PROFILE_PATH}")"
OUTPUT="$(run_install)"
case "${OUTPUT}" in
  *"nvm source string already in"*"bash_completion source string already in"*) ;;
  *) die "an active profile should not be touched; got: ${OUTPUT}" ;;
esac
[ "_$(cat "${NVM_PROFILE_PATH}")" = "_${BEFORE}" ] || die "the profile was changed: $(cat "${NVM_PROFILE_PATH}")"

cleanup