#!/usr/bin/env bash
# Smoke: selfhost compiler (buxc2) — move_field ownership + multi-file #line
set -euo pipefail
ROOT="$(cd "$(dirname "$0")/.." && pwd)"
BUXC2="$ROOT/build/selfhost/build/buxc2"
export BUX_STDLIB="$ROOT/lib"
unset BUX_DEBUG_FILE || true
unset BUX_NO_LINE || true

if [[ ! -x "$BUXC2" ]]; then
  echo "=== building selfhost (buxc2) ==="
  (cd "$ROOT" && make selfhost)
fi
if [[ ! -x "$BUXC2" ]]; then
  echo "error: buxc2 not found at $BUXC2" >&2
  exit 1
fi

TMP=$(mktemp -d)
trap 'rm -rf "$TMP"' EXIT

# ---------------------------------------------------------------------------
# 1) move_field — Array moved into struct must not UAF; program runs
# ---------------------------------------------------------------------------
echo "=== selfhost: move_field ==="
MF="$TMP/move_field"
mkdir -p "$MF/src"
cp -a "$ROOT/rt" "$MF/"
cat > "$MF/bux.toml" <<'EOF'
[Package]
Name    = "move_field"
Version = "0.1.0"
Type    = "bin"

[Build]
Output = "Bin"
EOF
cp "$ROOT/examples/move_field.bux" "$MF/src/Main.bux"

(cd "$MF" && "$BUXC2" project .)
out=$("$MF/build/move_field")
echo "$out" | tee "$TMP/mf.out"
grep -q 'sum=30' "$TMP/mf.out"
grep -q 'PASS' "$TMP/mf.out" || grep -q 'move_field' "$TMP/mf.out"
# No Drop of moved local in MakeBox
if grep -A20 'MakeBox' "$MF/build/main.c" | grep -q 'Array_Drop_int(&items)'; then
  echo "error: MakeBox still drops moved 'items'" >&2
  grep -n 'MakeBox\|Array_Drop_int' "$MF/build/main.c" | head -30
  exit 1
fi
echo "  move_field: PASS (run + no Drop of moved Array)"

# ---------------------------------------------------------------------------
# 2) multi-file #line — Util.bux + Main.bux + stdlib paths, no BUX_DEBUG_FILE
# ---------------------------------------------------------------------------
echo "=== selfhost: multi-file #line ==="
MF2="$TMP/mfline"
mkdir -p "$MF2/src"
cp -a "$ROOT/rt" "$MF2/"
cat > "$MF2/bux.toml" <<'EOF'
[Package]
Name    = "mfline"
Version = "0.1.0"
Type    = "bin"

[Build]
Output = "Bin"
EOF
cat > "$MF2/src/Util.bux" <<'EOF'
module Util {
    pub func Util_Double(n: int) -> int {
        return n * 2;
    }
}
EOF
cat > "$MF2/src/Main.bux" <<'EOF'
import Std::Io::{PrintLine};
import Std::String::{String_FromInt};

func Main() -> int {
    let v: int = Util_Double(21);
    PrintLine(String_FromInt(v as int64));
    return 0;
}
EOF

(cd "$MF2" && "$BUXC2" project .)
run_out=$("$MF2/build/mfline")
echo "$run_out" | tee "$TMP/mf2.out"
grep -q '42' "$TMP/mf2.out"

MAIN_C="$MF2/build/main.c"
test -f "$MAIN_C"
# Distinct source paths in #line
if ! grep -qE '#line [0-9]+ ".*Util\.bux"' "$MAIN_C"; then
  echo "error: no #line for Util.bux" >&2
  grep -E '^#line ' "$MAIN_C" | tail -20
  exit 1
fi
if ! grep -qE '#line [0-9]+ ".*Main\.bux"' "$MAIN_C"; then
  echo "error: no #line for Main.bux" >&2
  exit 1
fi
# Stdlib also stamped
if ! grep -qE '#line [0-9]+ ".*lib/.*\.bux"' "$MAIN_C"; then
  echo "error: no #line for stdlib lib/*.bux" >&2
  exit 1
fi
echo "  multi-file #line: PASS (Util + Main + lib)"

# ---------------------------------------------------------------------------
# 3) HirNode-level sourceFile — statement #line inside Util_Double uses Util.bux
#    (not only the function prolog), and never Main.bux inside that body.
# ---------------------------------------------------------------------------
echo "=== selfhost: HirNode sourceFile (#line in body) ==="
# Function definition (not the forward decl): #line 1 "…Util.bux" then int Util_Double(
util_body=$(awk '
  /#line 1 ".*Util\.bux"/ { grab=1 }
  grab { print }
  grab && /^}/ { exit }
' "$MAIN_C")
if [[ -z "$util_body" ]]; then
  echo "error: could not find Util_Double definition block" >&2
  grep -n 'Util_Double\|Util\.bux' "$MAIN_C" | head -20
  exit 1
fi
# Statement-level #line inside body (not only prolog #line 1) must point at Util.bux
if ! echo "$util_body" | grep -vE '#line 1 "' | grep -qE '#line [0-9]+ ".*Util\.bux"'; then
  echo "error: Util_Double body has no statement #line …Util.bux" >&2
  echo "$util_body"
  exit 1
fi
# Body of Util_Double must not claim Main.bux
if echo "$util_body" | grep -qE '#line [0-9]+ ".*Main\.bux"'; then
  echo "error: Util_Double body has #line Main.bux (wrong sourceFile)" >&2
  echo "$util_body" | grep -E '#line '
  exit 1
fi
echo "  HirNode sourceFile: PASS (Util_Double stmts → Util.bux)"

echo "PASS: selfhost smoke (move_field + multi-file #line + HirNode sourceFile)"