#!/bin/sh

WORK="$PWD/shadowed-curl-work.$$"
TEST_BIN="$WORK/bin"
ARGV_LOG="$WORK/argv.log"

cleanup () {
  unset -f die cleanup curl wget
  rm -rf "$WORK"
  export PATH="$OLDPATH"
}

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

NVM_ENV=testing \. ../../../nvm.sh

\. ../../common.sh

OLDPATH="$PATH"

# real-looking curl on PATH; calling the shadowing shell function below instead is a failure
make_fake_curl "$TEST_BIN" ': > "$ARGV_LOG"
for a in "$@"; do printf "%s\n" "$a" >> "$ARGV_LOG"; done'

VERSION_MESSAGE="curl 7.99.0 (fake)
Features: libz"

export ARGV_LOG
export PATH="$TEST_BIN:$OLDPATH"

# shadowing shell functions, like aliases baked into a user's shell, must be
# bypassed in favor of the executables on PATH (https://github.com/nvm-sh/nvm/issues/2923)
curl() {
  echo 'curl 0.0.0-shadowed'
  return 1
}
wget() {
  return 1
}

[ "$(nvm_curl_version)" = '7.99.0' ] || die "nvm_curl_version used the shadowing curl function; got $(nvm_curl_version)"

nvm_curl_libz_support || die 'nvm_curl_libz_support used the shadowing curl function'

nvm_download -s 'http://example.com/' -o /dev/null || die 'nvm_download used the shadowing curl function and failed'
grep -Fxq 'http://example.com/' "$ARGV_LOG" || die "nvm_download did not invoke the curl executable; got: $(cat "$ARGV_LOG")"

# when no curl executable exists, a shadowing curl shell function must not fool
# downloader selection: nvm_download must fall back to the wget executable
WGET_ONLY_BIN="$WORK/wget-only-bin"
mkdir -p "$WGET_ONLY_BIN"
{
  echo '#!/bin/sh'
  echo ': > "$ARGV_LOG"'
  echo 'for a in "$@"; do printf "%s\n" "$a" >> "$ARGV_LOG"; done'
} > "$WGET_ONLY_BIN/wget"
chmod +x "$WGET_ONLY_BIN/wget"

(
  PATH="$WGET_ONLY_BIN"
  export PATH
  nvm_download -s 'http://wget-fallback.example.com/' -o /dev/null
) || die 'nvm_download did not fall back to wget when curl is only a shell function'
grep -Fxq 'http://wget-fallback.example.com/' "$ARGV_LOG" || die "nvm_download did not invoke the wget executable; got: $(cat "$ARGV_LOG")"

cleanup