#!/usr/bin/env bash
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
source "$SCRIPT_DIR/../harness/helpers.sh"
source "$SCRIPT_DIR/../harness/mock-nas.sh"

# Test: write-back drain times out when transfers cannot complete.
# Extreme network latency prevents the drain from finishing within the
# 300s timeout, so warpgate should log a timeout and exit anyway.
# This is a slow test (>300s) — requires WARPGATE_TEST_LONG=1.

require_root
require_long_tests
setup_test_env
trap teardown_test_env EXIT

start_mock_nas

gen_config write_back=5s

start_warpgate
wait_for_mount
wait_for_rc_api

# Write a file so there is something to drain
echo "timeout-test-data" > "$TEST_MOUNT/timeout.txt"

# Allow VFS to register the write
sleep 1

# Inject extreme latency — 10s per packet makes transfer effectively impossible
inject_latency 10000

# Send SIGTERM to initiate shutdown + drain
kill -TERM "$WARPGATE_PID"

# The drain timeout is 300s; allow additional margin for shutdown
wait_for_exit "$WARPGATE_PID" 320

# Verify the drain timed out
assert_log_contains "write-back drain timed out"

echo "PASS: $(basename "$0" .sh)"