#!/usr/bin/env bash
# Test: cache miss triggers remote file pull into local VFS cache
#
# Verifies that reading a file through the FUSE mount for the first time
# fetches it from the remote NAS via rclone and stores it in $CACHE_DIR/vfs/nas/.
set -euo pipefail
SCRIPT_DIR="$(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 and place a 1 MB raw photo file on it
start_mock_nas
nas_create_file "photo.cr3" 1024

# Generate default config pointing at mock NAS
gen_config

# Start warpgate and wait for mount + RC API readiness
start_warpgate
wait_for_mount
wait_for_rc_api

# Verify the file is NOT cached yet
assert_not_cached "photo.cr3"

# Read the file through the FUSE mount (triggers cache-miss pull)
cat "$TEST_MOUNT/photo.cr3" > /dev/null

# Verify the content matches the source file on the NAS
diff "$TEST_MOUNT/photo.cr3" "$NAS_ROOT/photo.cr3"

# Verify the file is now present in the VFS cache
assert_cached "photo.cr3"

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