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

# CASAN Plan-16 SEC-23 Phase 1 (MT-01) — tenant-partitioned state store + guard.
#
# Proves:
#   * 23.1 two tenants resolve to DIFFERENT partitioned paths; an invalid/traversal
#     tenant id or logical name is rejected,
#   * 23.2 cross-tenant guard: tenant A cannot access tenant B's path (DENY), but its
#     own path is allowed,
#   * 23.3 the tenant root is created 0700 (owner-only),
#   * 23.12 secure-by-default: prod with no CASAN_TENANT_ID fails CLOSED; dev falls
#     back to a 'default' tenant; prod WITH a tenant is fine.
#
# Deterministic; hermetic (temp tenant-state root); no model/network.

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/../scripts/bash/casan-paths.sh"
PROJECT_ROOT="$CASAN_APP_ROOT"
TS="$CASAN_HARNESS_ROOT/scripts/bash/tenant-store.sh"
WORK="$(mktemp -d)"
trap 'rm -rf "$WORK"' EXIT
export CASAN_TENANT_STATE_ROOT="$WORK/tenants"

PASS=0; FAIL=0
pass() { echo "PASS: $1"; PASS=$((PASS + 1)); }
fail() { echo "FAIL: $1"; FAIL=$((FAIL + 1)); }
rc_of() { set +e; "$@" >/dev/null 2>&1; echo $?; set -e 2>/dev/null || true; }

echo "===== Plan-16 SEC-23 Phase 1: tenant-store + cross-tenant guard ====="

# --- 23.1 partitioned paths + id/name validation ---
pA="$(CASAN_TENANT_ID=alpha bash "$TS" resolve audit/chain.jsonl 2>/dev/null)"
pB="$(CASAN_TENANT_ID=beta  bash "$TS" resolve audit/chain.jsonl 2>/dev/null)"
{ [[ "$pA" != "$pB" && "$pA" == *"/alpha/audit/chain.jsonl" && "$pB" == *"/beta/audit/chain.jsonl" ]]; } \
  && pass "23.1 two tenants resolve to different partitioned paths" \
  || fail "23.1 tenant partitioning wrong (A=$pA B=$pB)"

[[ "$(rc_of env CASAN_TENANT_ID=../evil bash "$TS" resolve x)" -eq 3 ]] \
  && pass "23.1 traversal tenant id rejected" || fail "23.1 traversal id accepted"
[[ "$(rc_of env CASAN_TENANT_ID='a b' bash "$TS" resolve x)" -eq 3 ]] \
  && pass "23.1 invalid-charset tenant id rejected" || fail "23.1 bad-charset id accepted"
[[ "$(rc_of env CASAN_TENANT_ID=alpha bash "$TS" resolve ../../escape)" -eq 3 ]] \
  && pass "23.1 traversal logical-name rejected" || fail "23.1 traversal name accepted"

# --- 23.3 tenant root 0700 ---
CASAN_TENANT_ID=alpha bash "$TS" init >/dev/null 2>&1
mode="$(stat -c '%a' "$WORK/tenants/alpha" 2>/dev/null || stat -f '%Lp' "$WORK/tenants/alpha" 2>/dev/null)"
[[ "$mode" == "700" ]] && pass "23.3 tenant root created 0700 (owner-only)" || fail "23.3 tenant root mode=$mode (want 700)"

# --- 23.2 cross-tenant guard ---
betaPath="$(CASAN_TENANT_ID=beta bash "$TS" resolve audit/chain.jsonl 2>/dev/null)"
[[ "$(rc_of env CASAN_TENANT_ID=alpha bash "$TS" guard "$betaPath")" -eq 3 ]] \
  && pass "23.2 tenant A denied access to tenant B's path" || fail "23.2 cross-tenant access allowed"
alphaPath="$(CASAN_TENANT_ID=alpha bash "$TS" resolve audit/chain.jsonl 2>/dev/null)"
[[ "$(rc_of env CASAN_TENANT_ID=alpha bash "$TS" guard "$alphaPath")" -eq 0 ]] \
  && pass "23.2 tenant A allowed access to its own path" || fail "23.2 own path wrongly denied"

# --- 23.12 secure-by-default ---
[[ "$(rc_of env CASAN_PROFILE=prod bash "$TS" id)" -eq 3 ]] \
  && pass "23.12 prod without CASAN_TENANT_ID fails CLOSED" || fail "23.12 prod ran without tenant"
out="$(bash "$TS" id 2>/dev/null)"
[[ "$out" == "default" ]] && pass "23.12 dev falls back to 'default' tenant" || fail "23.12 dev id=$out"
[[ "$(rc_of env CASAN_PROFILE=prod CASAN_TENANT_ID=alpha bash "$TS" id)" -eq 0 ]] \
  && pass "23.12 prod WITH tenant is accepted" || fail "23.12 prod with tenant wrongly refused"

echo ""
echo "===== SEC-23 Phase 1 SUMMARY: PASS=$PASS FAIL=$FAIL ====="
[[ "$FAIL" -eq 0 ]] || exit 1