#!/bin/sh

set -e

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

export NVM_DIR="$(cd ../.. && pwd)"

# `--delete-prefix` covers only the npmrc files, so an inherited prefix in the
# environment would still abort `nvm use`
unset PREFIX npm_config_prefix NPM_CONFIG_PREFIX

: nvm.sh
\. ../../nvm.sh
\. ../common.sh

# the block under test is gated on `nvm_has manpath`, and the Alpine CI images
# ship no `manpath`; the output is recognizable so that a reintroduced
# `$(manpath)` call fails the assertions instead of passing vacuously
manpath() {
  echo '/usr/share/man'
}

make_fake_node v0.10.2
make_fake_node v0.10.3

MAN_2="$(nvm_version_path v0.10.2)/share/man"
MAN_3="$(nvm_version_path v0.10.3)/share/man"

# nvm has to contribute the empty entry itself when there is nothing to preserve
unset MANPATH
nvm use --delete-prefix v0.10.2 --silent || die "Failed to activate v0.10.2"
[ "${MANPATH}" = "${MAN_2}:" ] || die "MANPATH should be '${MAN_2}:'; got '${MANPATH}'"

nvm deactivate --silent || die "Failed to deactivate v0.10.2"
[ -z "${MANPATH-}" ] || die "MANPATH should be unset again; got '${MANPATH}'"

# nvm's entry first, the empty entry last: the reverse of what a leading empty
# entry produces
MANPATH='/opt/foo/man'
nvm use --delete-prefix v0.10.2 --silent || die "Failed to activate v0.10.2"
[ "${MANPATH}" = "${MAN_2}:/opt/foo/man:" ] || die "MANPATH should be '${MAN_2}:/opt/foo/man:'; got '${MANPATH}'"

# switching versions replaces nvm's entry without accruing more empty ones
nvm use --delete-prefix v0.10.3 --silent || die "Failed to activate v0.10.3"
[ "${MANPATH}" = "${MAN_3}:/opt/foo/man:" ] || die "MANPATH should be '${MAN_3}:/opt/foo/man:'; got '${MANPATH}'"

nvm use --delete-prefix v0.10.2 --silent || die "Failed to reactivate v0.10.2"
[ "${MANPATH}" = "${MAN_2}:/opt/foo/man:" ] || die "MANPATH should be '${MAN_2}:/opt/foo/man:'; got '${MANPATH}'"

nvm deactivate --silent || die "Failed to deactivate v0.10.2"
[ "${MANPATH}" = '/opt/foo/man:' ] || die "MANPATH should be '/opt/foo/man:'; got '${MANPATH}'"

# a value with no empty entry at all still deactivates to nothing
MANPATH="${MAN_2}"
nvm deactivate --silent || die "Failed to deactivate v0.10.2"
[ -z "${MANPATH-}" ] || die "MANPATH should be unset again; got '${MANPATH}'"

# an empty entry the user placed themselves stays where they put it
for TEST_MANPATH in ':/opt/foo/man' '/opt/foo/man:' '/a/man::/b/man'; do
  MANPATH="${TEST_MANPATH}"

  nvm use --delete-prefix v0.10.2 --silent || die "Failed to activate v0.10.2 with MANPATH '${TEST_MANPATH}'"
  [ "${MANPATH}" = "${MAN_2}:${TEST_MANPATH}" ] || die "MANPATH should be '${MAN_2}:${TEST_MANPATH}'; got '${MANPATH}'"

  nvm deactivate --silent || die "Failed to deactivate v0.10.2 with MANPATH '${TEST_MANPATH}'"
  [ "${MANPATH}" = "${TEST_MANPATH}" ] || die "MANPATH should be '${TEST_MANPATH}'; got '${MANPATH}'"
done