#!/usr/bin/env bash
# next/tests/bootstrap_build.sh — Step 4d acceptance test.
#
# Exercises bootstrap:build_genesis/1, verify_genesis/2,
# cidhash_path/1, write_cidhash/2, read_cidhash/1. The bundle CID
# is computed by delegating to the host cid:to_string BIF (Step 1b
# substrate) over the read_genesis result. 11 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

# Clean any stale .cidhash from previous runs before tests touch
# the filesystem.
rm -f next/genesis/.cidhash

VERBOSE="${1:-}"
PASS=0; FAIL=0; ERRORS=""
TMPFILE=$(mktemp); trap "rm -f $TMPFILE; rm -f next/genesis/.cidhash" 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/bootstrap.erl\")) :name)")

;; build_genesis returns {ok, [{cid, _}, {sections, _}]}
(epoch 10)
(eval "(erlang-eval-ast \"{ok, B} = bootstrap:build_genesis(bootstrap:read_genesis()), {Tag, _} = hd(B), Tag\")")

;; The CID is a non-empty binary
(epoch 11)
(eval "(get (erlang-eval-ast \"{ok, [{cid, C}, _]} = bootstrap:build_genesis(bootstrap:read_genesis()), is_binary(C)\") :name)")
(epoch 12)
(eval "(get (erlang-eval-ast \"{ok, [{cid, C}, _]} = bootstrap:build_genesis(bootstrap:read_genesis()), byte_size(C) > 50\") :name)")

;; build_genesis is deterministic across calls
(epoch 13)
(eval "(get (erlang-eval-ast \"{ok, [{cid, C1}, _]} = bootstrap:build_genesis(bootstrap:read_genesis()), {ok, [{cid, C2}, _]} = bootstrap:build_genesis(bootstrap:read_genesis()), C1 =:= C2\") :name)")

;; build_genesis preserves the sections list
(epoch 14)
(eval "(erlang-eval-ast \"{ok, [_, {sections, S}]} = bootstrap:build_genesis(bootstrap:read_genesis()), length(S)\")")

;; build_genesis rejects bad input shapes
(epoch 15)
(eval "(get (erlang-eval-ast \"case bootstrap:build_genesis({error, broken}) of {error, {bad_read_result, _}} -> ok; _ -> bad end\") :name)")

;; verify_genesis returns ok when CID matches
(epoch 20)
(eval "(get (erlang-eval-ast \"{ok, [{cid, C}, _]} = bootstrap:build_genesis(bootstrap:read_genesis()), bootstrap:verify_genesis(bootstrap:read_genesis(), C) =:= ok\") :name)")

;; verify_genesis returns {error, {cid_mismatch, _, _}} when CID doesn't match
(epoch 21)
(eval "(get (erlang-eval-ast \"case bootstrap:verify_genesis(bootstrap:read_genesis(), <<99,99,99>>) of {error, {cid_mismatch, _, _}} -> ok; _ -> bad end\") :name)")

;; cidhash_path concatenation
(epoch 22)
(eval "(get (erlang-eval-ast \"bootstrap:cidhash_path(<<110,101,120,116>>) =:= <<110,101,120,116,47,46,99,105,100,104,97,115,104>>\") :name)")

;; write_cidhash + read_cidhash round-trip the bundle CID
(epoch 23)
(eval "(get (erlang-eval-ast \"{ok, [{cid, C}, _]} = bootstrap:build_genesis(bootstrap:read_genesis()), Base = bootstrap:default_base(), ok = bootstrap:write_cidhash(Base, C), {ok, Stored} = bootstrap:read_cidhash(Base), Stored =:= C\") :name)")

;; Full verify path against the persisted .cidhash
(epoch 24)
(eval "(get (erlang-eval-ast \"Base = bootstrap:default_base(), {ok, [{cid, C}, _]} = bootstrap:build_genesis(bootstrap:read_genesis()), ok = bootstrap:write_cidhash(Base, C), {ok, Stored} = bootstrap:read_cidhash(Base), bootstrap:verify_genesis(bootstrap:read_genesis(), Stored) =:= ok\") :name)")
EPOCHS

OUTPUT=$(timeout 180 "$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"                "bootstrap"
check 10  "build_genesis head tag"          "cid"
check 11  "CID is a binary"                 "true"
check 12  "CID length > 50"                 "true"
check 13  "build_genesis deterministic"     "true"
check 14  "sections preserved (7 entries)"  "7"
check 15  "build_genesis rejects bad shape" "ok"
check 20  "verify_genesis ok when match"    "true"
check 21  "verify_genesis errs on mismatch" "ok"
check 22  "cidhash_path concatenation"      "true"
check 23  "write/read_cidhash round-trip"   "true"
check 24  "verify against persisted hash"   "true"

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