#!/usr/bin/env bash
# next/tests/envelope_shape.sh — Step 2a acceptance test.
#
# Loads next/kernel/envelope.erl into the Erlang-on-SX runtime and
# checks validate_shape/1 / get_field/2 against the design §3.1 shape
# contract. 13 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/envelope.erl\")) :name)")

;; Reusable valid envelope as Erlang text. The signature itself is a
;; property list with key_id, algorithm, value.
;;   E0 = [{id,1},{type,create},{actor,alice},{published,1000},
;;         {signature,[{key_id,k1},{algorithm,ed25519},{value,v}]}]

;; Complete valid envelope
(epoch 10)
(eval "(get (erlang-eval-ast \"envelope:validate_shape([{id,1},{type,create},{actor,alice},{published,1000},{signature,[{key_id,k1},{algorithm,ed25519},{value,v}]}]) =:= ok\") :name)")

;; Missing each top-level required field
(epoch 11)
(eval "(get (erlang-eval-ast \"envelope:validate_shape([{type,create},{actor,alice},{published,1000},{signature,[{key_id,k1},{algorithm,ed25519},{value,v}]}]) =:= {error,{missing_field,id}}\") :name)")
(epoch 12)
(eval "(get (erlang-eval-ast \"envelope:validate_shape([{id,1},{actor,alice},{published,1000},{signature,[{key_id,k1},{algorithm,ed25519},{value,v}]}]) =:= {error,{missing_field,type}}\") :name)")
(epoch 13)
(eval "(get (erlang-eval-ast \"envelope:validate_shape([{id,1},{type,create},{published,1000},{signature,[{key_id,k1},{algorithm,ed25519},{value,v}]}]) =:= {error,{missing_field,actor}}\") :name)")
(epoch 14)
(eval "(get (erlang-eval-ast \"envelope:validate_shape([{id,1},{type,create},{actor,alice},{signature,[{key_id,k1},{algorithm,ed25519},{value,v}]}]) =:= {error,{missing_field,published}}\") :name)")
(epoch 15)
(eval "(get (erlang-eval-ast \"envelope:validate_shape([{id,1},{type,create},{actor,alice},{published,1000}]) =:= {error,{missing_field,signature}}\") :name)")

;; Non-list inputs
(epoch 16)
(eval "(get (erlang-eval-ast \"envelope:validate_shape(42) =:= {error,not_a_proplist}\") :name)")
(epoch 17)
(eval "(get (erlang-eval-ast \"envelope:validate_shape(some_atom) =:= {error,not_a_proplist}\") :name)")

;; Signature sub-shape
(epoch 20)
(eval "(get (erlang-eval-ast \"envelope:validate_shape([{id,1},{type,create},{actor,alice},{published,1000},{signature,[{algorithm,ed25519},{value,v}]}]) =:= {error,{bad_signature,{missing_field,key_id}}}\") :name)")
(epoch 21)
(eval "(get (erlang-eval-ast \"envelope:validate_shape([{id,1},{type,create},{actor,alice},{published,1000},{signature,[{key_id,k1},{value,v}]}]) =:= {error,{bad_signature,{missing_field,algorithm}}}\") :name)")
(epoch 22)
(eval "(get (erlang-eval-ast \"envelope:validate_shape([{id,1},{type,create},{actor,alice},{published,1000},{signature,[{key_id,k1},{algorithm,ed25519}]}]) =:= {error,{bad_signature,{missing_field,value}}}\") :name)")
(epoch 23)
(eval "(get (erlang-eval-ast \"envelope:validate_shape([{id,1},{type,create},{actor,alice},{published,1000},{signature,not_a_proplist}]) =:= {error,{bad_signature,not_a_proplist}}\") :name)")

;; get_field
(epoch 30)
(eval "(get (erlang-eval-ast \"envelope:get_field(actor,[{id,1},{actor,alice}]) =:= {ok,alice}\") :name)")
(epoch 31)
(eval "(get (erlang-eval-ast \"envelope:get_field(missing,[{id,1},{actor,alice}]) =:= not_found\") :name)")
EPOCHS

OUTPUT=$(timeout 120 "$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"                  "envelope"
check 10  "complete envelope -> ok"           "true"
check 11  "missing id"                        "true"
check 12  "missing type"                      "true"
check 13  "missing actor"                     "true"
check 14  "missing published"                 "true"
check 15  "missing signature"                 "true"
check 16  "non-list (integer)"                "true"
check 17  "non-list (atom)"                   "true"
check 20  "signature missing key_id"          "true"
check 21  "signature missing algorithm"       "true"
check 22  "signature missing value"           "true"
check 23  "signature not a proplist"          "true"
check 30  "get_field hit"                     "true"
check 31  "get_field miss"                    "true"

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