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

# CASAN Plan-13 — Control Plane governed settings store (harness-owned core).
# Deterministic; no model/app required. Proves deny-by-default, approval gating,
# versioning/rollback, and audit hash-chain tamper detection.

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
CP="$PROJECT_ROOT/.specify/scripts/bash/control-plane-settings.py"
WORK="$(mktemp -d)"
trap 'rm -rf "$WORK"' EXIT
export CASAN_CP_STORE_FILE="$WORK/store.json"

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

echo "===== Plan-13 Control Plane governed settings (harness core) ====="

# 1) deny-by-default
set +e
python3 "$CP" set not.allowed.key 1 --actor a@x --reason r >/dev/null 2>"$WORK/1.err"; RC=$?
set -e 2>/dev/null || true
[[ "$RC" -eq 2 ]] && grep -q "SETTING_NOT_ALLOWED" "$WORK/1.err" \
  && pass "deny-by-default rejects unknown key" || fail "unknown key not rejected (rc=$RC)"

# 2) non-sensitive set + version increment
python3 "$CP" set compression.enabled true --actor a@x --reason enable >/dev/null 2>&1
V2="$(python3 "$CP" set compression.enabled false --actor a@x --reason disable 2>/dev/null | python3 -c 'import json,sys;print(json.load(sys.stdin)["version"])')"
[[ "$V2" == "2" ]] && pass "non-sensitive set versioned (version=$V2)" || fail "versioning wrong (version=$V2)"

# 3) security-sensitive requires approval
set +e
python3 "$CP" set security.strict true --actor a@x --reason r >/dev/null 2>"$WORK/3.err"; RC=$?
set -e 2>/dev/null || true
[[ "$RC" -eq 3 ]] && grep -q "APPROVAL_REQUIRED" "$WORK/3.err" \
  && pass "security-sensitive set denied without approval" || fail "approval gate missing (rc=$RC)"
python3 "$CP" set security.strict true --actor a@x --reason r --approval jwt-tok >/dev/null 2>&1 \
  && pass "security-sensitive set allowed with approval" || fail "approved sensitive set failed"

# 4) rollback restores previous value
python3 "$CP" set cost.absolute_cap_usd 1 --actor a@x --reason first >/dev/null 2>&1
python3 "$CP" set cost.absolute_cap_usd 5 --actor a@x --reason second >/dev/null 2>&1
RB="$(python3 "$CP" rollback cost.absolute_cap_usd --actor a@x --reason revert 2>/dev/null | python3 -c 'import json,sys;print(json.load(sys.stdin)["value"])')"
[[ "$RB" == "1" ]] && pass "rollback restores previous value" || fail "rollback wrong (value=$RB)"

# 5) audit verifies intact, then detects tampering (fail-able)
python3 "$CP" verify-audit >/dev/null 2>&1 && pass "audit chain verifies intact" || fail "intact audit reported broken"
python3 - "$CASAN_CP_STORE_FILE" <<'PY'
import json, sys
d = json.load(open(sys.argv[1]))
d["audit"][0]["value"] = "tampered"
json.dump(d, open(sys.argv[1], "w"))
PY
set +e
python3 "$CP" verify-audit >/dev/null 2>"$WORK/5.err"; RC=$?
set -e 2>/dev/null || true
[[ "$RC" -eq 1 ]] && pass "audit chain detects tampering (fail-able gate)" || fail "tamper not detected (rc=$RC)"

# 6) effective: default when unset, override when set
[[ "$(python3 "$CP" effective compression.mode --default extractive 2>/dev/null)" == "extractive" ]] \
  && pass "effective returns default when unset" || fail "effective default wrong"
python3 "$CP" set compression.mode structural --actor a@x --reason r >/dev/null 2>&1
[[ "$(python3 "$CP" effective compression.mode --default extractive 2>/dev/null)" == "structural" ]] \
  && pass "effective returns override when set" || fail "effective override wrong"

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