#!/usr/bin/env bash
# Test: write-back completes and file appears on NAS
#
# Verifies that after a file is written through the mount, the rclone VFS
# write-back mechanism flushes it to the remote NAS within the configured
# write-back delay, and the dirty count returns to zero.
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
source "$SCRIPT_DIR/../harness/helpers.sh"
source "$SCRIPT_DIR/../harness/mock-nas.sh"

require_root
setup_test_env
trap teardown_test_env EXIT

# Start mock NAS
start_mock_nas

# Generate config with a short write-back delay (2s)
gen_config write_back=2s

# Start warpgate and wait for readiness
start_warpgate
wait_for_mount
wait_for_rc_api

# Write a file through the FUSE mount
echo "writeback-test" > "$TEST_MOUNT/wb.txt"

# Wait for the dirty count to return to zero (write-back complete)
wait_for_dirty_zero 30

# Verify the file arrived on the NAS with correct content
assert_file_content "$NAS_ROOT/wb.txt" "writeback-test"

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