#!/usr/bin/env bash
# Exit 0 full, 1 degraded, 2 no LaTeX.
set -uo pipefail
QUIET=0
[[ "${1:-}" == "--quiet" ]] && QUIET=1
say() { [[ $QUIET -eq 1 ]] || echo -e "$*"; }
ok=0; warn=0; fail=0
check() {
  local name="$1"; shift
  if "$@" >/dev/null 2>&1; then say "  ok    $name"; return 0
  else say "  MISS  $name"; return 1; fi
}
say "superderive preflight"
say "--- required ---"
check "xelatex"        command -v xelatex        || fail=$((fail+1))
check "standalone.cls" kpsewhich standalone.cls  || fail=$((fail+1))
check "tikz.sty"       kpsewhich tikz.sty        || fail=$((fail+1))
check "etoolbox.sty"   kpsewhich etoolbox.sty    || fail=$((fail+1))
say "--- chinese figures ---"
check "ctex.sty" kpsewhich ctex.sty || warn=$((warn+1))
check "fandol"   kpsewhich FandolSong-Regular.otf || warn=$((warn+1))
say "--- export ---"
check "pdftocairo" command -v pdftocairo || warn=$((warn+1))
if [[ $fail -gt 0 ]]; then say "RESULT: no LaTeX."; exit 2; fi
if [[ $warn -gt 0 ]]; then say "RESULT: degraded."; exit 1; fi
say "RESULT: full path."
exit 0