#!/bin/sh

WORK="$PWD/normalize_lts-non-numeric-work.$$"
export HOME="$WORK/home"
export NVM_DIR="$HOME/.nvm"
MARKER='nvm_normalize_lts_pwned'

cleanup() {
  unset -f die cleanup
  rm -rf "$WORK"
  rm -f "${MARKER}"
}
die () { echo "$@" ; cleanup ; exit 1; }

mkdir -p "$NVM_DIR/alias/lts"
rm -f "${MARKER}"

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

echo 'lts/iron' > "$NVM_DIR/alias/lts/*"
echo 'v18.0.0' > "$NVM_DIR/alias/lts/hydrogen"
echo 'v20.0.0' > "$NVM_DIR/alias/lts/iron"

ACTUAL="$(nvm_normalize_lts 'lts/-1')"
EXPECTED='lts/hydrogen'
[ "${ACTUAL}" = "${EXPECTED}" ] || die "lts/-1: expected >${EXPECTED}<, got >${ACTUAL}<"

ACTUAL="$(nvm_normalize_lts 'lts/-1x')"
EXPECTED='lts/-1x'
[ "${ACTUAL}" = "${EXPECTED}" ] || die "lts/-1x: expected >${EXPECTED}<, got >${ACTUAL}<"

ACTUAL="$(nvm_normalize_lts 'lts/-1-1')"
EXPECTED='lts/-1-1'
[ "${ACTUAL}" = "${EXPECTED}" ] || die "lts/-1-1: expected >${EXPECTED}<, got >${ACTUAL}<"

ACTUAL="$(nvm_normalize_lts 'lts/-10+1')"
EXPECTED='lts/-10+1'
[ "${ACTUAL}" = "${EXPECTED}" ] || die "lts/-10+1: expected >${EXPECTED}<, got >${ACTUAL}<"

# bash and zsh run command substitutions in array subscripts during arithmetic evaluation
INJECTED="lts/-10*path[\$(touch ${MARKER})1]"
ACTUAL="$(nvm_normalize_lts "${INJECTED}" 2>/dev/null)"
[ ! -e "${MARKER}" ] || die "nvm_normalize_lts evaluated ${INJECTED}"
[ "${ACTUAL}" = "${INJECTED}" ] || die "${INJECTED}: expected it unchanged, got >${ACTUAL}<"

nvm_alias "${INJECTED}" >/dev/null 2>&1
[ ! -e "${MARKER}" ] || die "nvm_alias evaluated ${INJECTED}"

# an alias file written by an older nvm from a hostile mirror's index.tab
echo "${INJECTED}" > "$NVM_DIR/alias/lts/iron"
nvm_resolve_alias 'lts/*' >/dev/null 2>&1
[ ! -e "${MARKER}" ] || die "nvm_resolve_alias evaluated a stored ${INJECTED}"

cleanup
echo "nvm_normalize_lts non-numeric offset: passed"