#!/usr/bin/env bash
# next/tests/http_accept.sh — Step 8d-accept acceptance test.
#
# Exercises accept_format/1 + accept_format_from/1. 12 cases.

set -uo pipefail
cd "$(git rev-parse --show-toplevel)"

SX_SERVER="${SX_SERVER:-hosts/ocaml/_build/default/bin/sx_server.exe}"
if [ ! -x "$SX_SERVER" ]; then
  SX_SERVER="/root/rose-ash/hosts/ocaml/_build/default/bin/sx_server.exe"
fi
if [ ! -x "$SX_SERVER" ]; then
  echo "ERROR: sx_server.exe not found." >&2
  exit 1
fi

VERBOSE="${1:-}"
PASS=0; FAIL=0; ERRORS=""
TMPFILE=$(mktemp); trap "rm -f $TMPFILE" EXIT

cat > "$TMPFILE" <<'EPOCHS'
(epoch 1)
(load "lib/erlang/tokenizer.sx")
(load "lib/erlang/parser.sx")
(load "lib/erlang/parser-core.sx")
(load "lib/erlang/parser-expr.sx")
(load "lib/erlang/parser-module.sx")
(load "lib/erlang/transpile.sx")
(load "lib/erlang/runtime.sx")
(load "lib/erlang/vm/dispatcher.sx")

(epoch 2)
(eval "(get (erlang-load-module (file-read \"next/kernel/http_server.erl\")) :name)")

;; activity_json
(epoch 10)
(eval "(get (erlang-eval-ast \"http_server:accept_format(<<97,112,112,108,105,99,97,116,105,111,110,47,97,99,116,105,118,105,116,121,43,106,115,111,110>>)\") :name)")

;; json
(epoch 11)
(eval "(get (erlang-eval-ast \"http_server:accept_format(<<97,112,112,108,105,99,97,116,105,111,110,47,106,115,111,110>>)\") :name)")

;; sx
(epoch 12)
(eval "(get (erlang-eval-ast \"http_server:accept_format(<<97,112,112,108,105,99,97,116,105,111,110,47,115,120>>)\") :name)")

;; cbor
(epoch 13)
(eval "(get (erlang-eval-ast \"http_server:accept_format(<<97,112,112,108,105,99,97,116,105,111,110,47,99,98,111,114>>)\") :name)")

;; text/plain -> text
(epoch 14)
(eval "(get (erlang-eval-ast \"http_server:accept_format(<<116,101,120,116,47,112,108,97,105,110>>)\") :name)")

;; nil -> text
(epoch 15)
(eval "(get (erlang-eval-ast \"http_server:accept_format(nil)\") :name)")

;; empty binary -> text
(epoch 16)
(eval "(get (erlang-eval-ast \"http_server:accept_format(<<>>)\") :name)")

;; activity_json wins over json when both present at the start
;; "application/activity+json, application/json"
(epoch 17)
(eval "(get (erlang-eval-ast \"http_server:accept_format(<<97,112,112,108,105,99,97,116,105,111,110,47,97,99,116,105,118,105,116,121,43,106,115,111,110,44,32,97,112,112,108,105,99,97,116,105,111,110,47,106,115,111,110>>)\") :name)")

;; accept_format_from with no header field -> text
(epoch 18)
(eval "(get (erlang-eval-ast \"http_server:accept_format_from([])\") :name)")

;; accept_format_from with Accept header
(epoch 19)
(eval "(get (erlang-eval-ast \"AK = <<97,99,99,101,112,116>>, AV = <<97,112,112,108,105,99,97,116,105,111,110,47,115,120>>, http_server:accept_format_from([{headers, [{AK, AV}]}])\") :name)")

;; accept_format_from with headers but no Accept -> text
(epoch 20)
(eval "(get (erlang-eval-ast \"OK = <<102,111,111>>, http_server:accept_format_from([{headers, [{OK, <<98,97,114>>}]}])\") :name)")

;; accept_format on a non-binary returns text
(epoch 21)
(eval "(get (erlang-eval-ast \"http_server:accept_format(some_atom)\") :name)")
EPOCHS

OUTPUT=$(timeout 60 "$SX_SERVER" < "$TMPFILE" 2>/dev/null)

check() {
  local epoch="$1" desc="$2" expected="$3"
  local actual
  actual=$(echo "$OUTPUT" | awk -v e="$epoch" '
    $0 ~ "^\\(ok-len " e " " { getline; print; exit }
    $0 ~ "^\\(ok " e " "     { print; exit }
    $0 ~ "^\\(error " e " "  { print; exit }
  ')
  [ -z "$actual" ] && actual="<no output for epoch $epoch>"
  if echo "$actual" | grep -qF -- "$expected"; then
    PASS=$((PASS+1))
    [ "$VERBOSE" = "-v" ] && echo "  ok $desc"
  else
    FAIL=$((FAIL+1))
    ERRORS+="  FAIL [$desc] (epoch $epoch) expected: $expected | actual: $actual
"
  fi
}

check  2  "module load name"                  "http_server"
check 10  "activity+json -> activity_json"    "activity_json"
check 11  "json -> json"                      "json"
check 12  "sx -> sx"                          "sx"
check 13  "cbor -> cbor"                      "cbor"
check 14  "text/plain -> text"                "text"
check 15  "nil -> text"                       "text"
check 16  "empty binary -> text"              "text"
check 17  "activity+json wins over json"      "activity_json"
check 18  "no headers -> text"                "text"
check 19  "Accept: application/sx -> sx"      "sx"
check 20  "no Accept header -> text"          "text"
check 21  "non-binary input -> text"          "text"

TOTAL=$((PASS+FAIL))
if [ $FAIL -eq 0 ]; then
  echo "ok $PASS/$TOTAL next/tests/http_accept.sh passed"
else
  echo "FAIL $PASS/$TOTAL passed, $FAIL failed:"
  echo "$ERRORS"
fi
[ $FAIL -eq 0 ]