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

# CASAN Plan-15/13 — harness preflight enforcement tests.
# Deterministic & offline: the BLOCK path short-circuits before any model call,
# so no Ollama/cloud is needed. Proves governance cores actually gate a run.

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/../scripts/bash/casan-paths.sh"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
S="$CASAN_HARNESS_ROOT/scripts/bash"
PF="$S/harness-preflight.sh"
ROUTER="$S/model-router.sh"
WORK="$(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)); }

printf 'Please summarize; contact alice@example.com about the account.\n' > "$WORK/pii.txt"
printf 'Please refactor the dashboard grid layout.\n' > "$WORK/benign.txt"

echo "===== harness preflight (governance enforced before model call) ====="

# 1) preflight blocks PII → cloud without approval
set +e
bash "$PF" "$WORK/pii.txt" "$WORK/out.json" --model openai:gpt-4o >/dev/null 2>"$WORK/1.err"; RC=$?
set -e 2>/dev/null || true
[[ "$RC" -ne 0 ]] && grep -q "PREFLIGHT_BLOCK" "$WORK/1.err" \
  && pass "preflight blocks PII→cloud without approval" || fail "preflight did not block (rc=$RC)"

# 2) preflight allows PII → cloud WITH approval
CASAN_MODEL_APPROVAL=human-ok bash "$PF" "$WORK/pii.txt" "$WORK/out.json" --model anthropic:claude >/dev/null 2>&1 \
  && pass "preflight allows PII→cloud with approval" || fail "approved cloud send blocked"

# 3) preflight allows benign → cloud
bash "$PF" "$WORK/benign.txt" "$WORK/out.json" --model openai:gpt-4o >/dev/null 2>&1 \
  && pass "preflight allows benign→cloud" || fail "benign cloud send blocked"

# 4) preflight ignores local model (no cloud data-gov gate)
bash "$PF" "$WORK/pii.txt" "$WORK/out.json" --model ollama:ornith:9b >/dev/null 2>&1 \
  && pass "preflight passes local model" || fail "local model wrongly blocked"

# 5) WIRED into router: CASAN_PREFLIGHT=1 blocks a cloud PII call BEFORE model-call
#    (short-circuits, so no live model is required to prove enforcement)
set +e
CASAN_PREFLIGHT=1 bash "$ROUTER" "$WORK/pii.txt" "$WORK/out.json" --model openai:gpt-4o >/dev/null 2>"$WORK/5.err"; RC=$?
set -e 2>/dev/null || true
[[ "$RC" -ne 0 ]] && grep -q "PREFLIGHT_BLOCK" "$WORK/5.err" \
  && pass "model-router honors CASAN_PREFLIGHT and blocks before model call" || fail "router preflight not enforced (rc=$RC)"

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