#!/usr/bin/env bash
set -uo pipefail

# CASAN Plan-10 — Traceability REQ→code→test MVP tests.
#
# Proves the matrix is generated from the real requirement document and the gate
# fails when any FR loses test coverage.

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
S="$PROJECT_ROOT/.specify/scripts/bash"
WORK="$(mktemp -d)"
trap 'rm -rf "$WORK"' EXIT

PASS=0; FAIL=0
pass() { echo "PASS: $1"; PASS=$((PASS + 1)); }
fail() { echo "FAIL: $1"; FAIL=$((FAIL + 1)); }

REQ="$PROJECT_ROOT/docs/input/okr-requirement.md"
MAP="$PROJECT_ROOT/.specify/traceability-map.json"
OUT="$WORK/traceability-matrix.json"

echo "===== Plan-10 traceability matrix ====="
if python3 "$S/traceability-matrix.py" --requirements "$REQ" --map "$MAP" --out "$OUT" --gate >/dev/null 2>"$WORK/pass.err"; then
  pass "complete FR→code→test matrix passes gate"
else
  cat "$WORK/pass.err"
  fail "complete traceability matrix rejected"
fi

COUNT="$(python3 -c "import json;d=json.load(open('$OUT'));print(d['summary']['requirements'])" 2>/dev/null)"
FAILED="$(python3 -c "import json;d=json.load(open('$OUT'));print(d['summary']['failed'])" 2>/dev/null)"
[[ "$COUNT" == "5" && "$FAILED" == "0" ]] \
  && pass "matrix captures all 5 FRs with zero failures" \
  || fail "matrix summary unexpected (requirements=$COUNT failed=$FAILED)"

BROKEN="$WORK/traceability-map-broken.json"
python3 - "$MAP" "$BROKEN" <<'PY'
import json, sys
d = json.load(open(sys.argv[1]))
d["FR-04"]["tests"] = []
json.dump(d, open(sys.argv[2], "w"), indent=2)
PY
set +e
python3 "$S/traceability-matrix.py" --requirements "$REQ" --map "$BROKEN" --out "$WORK/broken.json" --gate >/dev/null 2>"$WORK/broken.err"
RC=$?
set -e 2>/dev/null || true
[[ "$RC" -eq 1 ]] && grep -q "TRACEABILITY_FAIL FR-04" "$WORK/broken.err" \
  && pass "missing FR test coverage fails the gate" \
  || fail "missing test coverage did not fail as expected (rc=$RC)"

echo ""
echo "===== TRACEABILITY SUMMARY: PASS=$PASS FAIL=$FAIL ====="
[[ "$FAIL" -eq 0 ]] || exit 1