#!/bin/sh

cleanup () {
  rm -rf "$NVM_DIR"
  unset -f die cleanup
  unset NVM_DIR NODE_PATH VERSION
}
die () { echo "$@" ; cleanup ; exit 1; }

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

set -ex

NVM_DIR=$(mktemp -d)
NODE_PATH="$NVM_DIR/versions/node"
mkdir -p "$NODE_PATH"
if [ -z "$NODE_PATH" ]; then
  die 'Unable to create temporary folder'
fi

# nvm_is_installed_exact_version is available
type nvm_is_installed_exact_version > /dev/null 2>&1 || die 'nvm_is_installed_exact_version is not available'

# nvm_is_installed_exact_version with no parameter fails
! nvm_is_installed_exact_version || die 'nvm_is_installed_exact_version without parameter should fail'

# an exact version that is not installed fails
! nvm_is_installed_exact_version 'v12.0.0' || die 'v12.0.0 is not installed and should fail'

# an exact version whose node binary is not executable fails
mkdir -p "$NODE_PATH/v12.0.0/bin"
touch "$NODE_PATH/v12.0.0/bin/node"
! nvm_is_installed_exact_version 'v12.0.0' || die 'v12.0.0 with a non-executable node should fail'

# an exact, installed version succeeds
chmod +x "$NODE_PATH/v12.0.0/bin/node"
nvm_is_installed_exact_version 'v12.0.0' || die 'v12.0.0 is installed and should succeed'

# something shaped almost like vX.Y.Z fails, even when a directory by that name is installed
for VERSION in 'v12.0.0.0' 'v12.0.0.' 'v12..0' 'v.12.0' 'v12.0'; do
  mkdir -p "$NODE_PATH/$VERSION/bin"
  touch "$NODE_PATH/$VERSION/bin/node"
  chmod +x "$NODE_PATH/$VERSION/bin/node"
  ! nvm_is_installed_exact_version "$VERSION" || die "$VERSION is not an exact version and should fail, even when installed"
done

# anything that is not an exact vX.Y.Z fails, even if it would resolve to an installed version
for VERSION in '12.0.0' '12' 'v12' 'v12.0' 'v12.0.0-rc.1' 'node' 'stable' 'lts/*' 'iojs-v1.0.0' 'system' 'default'; do
  ! nvm_is_installed_exact_version "$VERSION" || die "$VERSION is not an exact version and should fail"
done

# an alias with the exact same name takes precedence, so the fast path must not apply
mkdir -p "$(nvm_alias_path)"
echo 'v12.0.0' > "$(nvm_alias_path)/v12.0.0"
! nvm_is_installed_exact_version 'v12.0.0' || die 'an alias named v12.0.0 should take precedence'

cleanup