#!/bin/sh

cleanup() {
  [ -n "${NVM_DIR}" ] && [ -d "${NVM_DIR}" ] && rm -rf "${NVM_DIR}"
  unset -f die cleanup make_healthy make_broken \
    nvm_remote_version nvm_has_executable nvm_binary_available \
    nvm_install_binary nvm_install_source nvm_use_if_needed \
    nvm_install_npm_if_needed nvm_install_default_packages nvm_ensure_default_set
  unset NVM_DIR version version_path REINSTALL_MARKER OUTPUT EXIT_CODE
}

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

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

unset npm_config_prefix NPM_CONFIG_PREFIX

NVM_DIR="$(mktemp -d)"
[ -n "${NVM_DIR}" ] || die 'unable to create temp NVM_DIR'

version='v20.0.0'
version_path="${NVM_DIR}/versions/node/${version}"
REINSTALL_MARKER="${NVM_DIR}/reinstalled"

# Stay offline and keep the post-install activation path inert; only the
# verification behaviour is under test here.
nvm_remote_version() { nvm_echo "${version}"; }
nvm_has_executable() { return 0; }
nvm_binary_available() { return 0; }
nvm_install_source() { return 1; }
nvm_use_if_needed() { return 0; }
nvm_install_npm_if_needed() { return 0; }
nvm_install_default_packages() { return 0; }
nvm_ensure_default_set() { return 0; }

make_healthy() {
  mkdir -p "${version_path}/bin"
  printf '#!/bin/sh\necho "%s"\n' "${version}" > "${version_path}/bin/node"
  chmod +x "${version_path}/bin/node"
}
make_broken() {
  mkdir -p "${version_path}/bin"
  : > "${version_path}/bin/node" # zero-byte but +x: passes nvm_is_version_installed
  chmod +x "${version_path}/bin/node"
}

# 1) An install that reports success but leaves a broken node must fail loudly
#    and must not be activated.
rm -rf "${version_path}"
nvm_install_binary() { make_broken; return 0; }
OUTPUT="$(nvm install -b "${version}" 2>&1)"; EXIT_CODE=$?
[ "${EXIT_CODE}" != "0" ] || die "a broken install should fail; got exit 0, output >${OUTPUT}<"
case "${OUTPUT}" in
  *'failed verification'*) ;;
  *) die "expected a verification-failure message; got >${OUTPUT}<" ;;
esac

# 2) An already-present but broken version must not short-circuit as "already
#    installed"; it must be reinstalled.
rm -rf "${version_path}"
make_broken
nvm_install_binary() { command touch "${REINSTALL_MARKER}"; make_healthy; return 0; }
OUTPUT="$(nvm install -b "${version}" 2>&1)"; EXIT_CODE=$?
case "${OUTPUT}" in
  *'is already installed'*) die "a broken version should not be treated as already installed: >${OUTPUT}<" ;;
esac
[ -f "${REINSTALL_MARKER}" ] || die 'a broken already-present version was not reinstalled'
[ "${EXIT_CODE}" = "0" ] || die "the healing reinstall should succeed; got ${EXIT_CODE}, output >${OUTPUT}<"

cleanup