#!/usr/bin/env bash
# Test: VFS cache stores files at the expected filesystem path
#
# Verifies that when a file is read through the FUSE mount, it appears
# at $CACHE_DIR/vfs/<connection_name>/FILENAME — the exact path that warmup's
# is_cached logic checks to decide whether to skip a file.
# The default connection name is "nas".
set -euo pipefail
SCRIPT_DIR="$(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 create files at various depths
start_mock_nas
nas_create_file_content "root-file.txt" "root-level"
nas_create_file_content "sub/nested-file.txt" "nested"
nas_create_file_content "sub/deep/deep-file.txt" "deep-nested"

# Generate default config (remote_path="/")
gen_config

# Start warpgate and wait for readiness
start_warpgate
wait_for_mount
wait_for_rc_api

# Read each file through the FUSE mount to trigger caching
cat "$TEST_MOUNT/root-file.txt" > /dev/null
cat "$TEST_MOUNT/sub/nested-file.txt" > /dev/null
cat "$TEST_MOUNT/sub/deep/deep-file.txt" > /dev/null

# Verify that each file is cached at the expected path under
# $CACHE_DIR/vfs/nas/ (since remote_path="/", no extra prefix)
assert_cached "root-file.txt"
assert_cached "sub/nested-file.txt"
assert_cached "sub/deep/deep-file.txt"

# Also verify the actual on-disk paths exist and have correct content
assert_file_content "$CACHE_DIR/vfs/nas/root-file.txt" "root-level"
assert_file_content "$CACHE_DIR/vfs/nas/sub/nested-file.txt" "nested"
assert_file_content "$CACHE_DIR/vfs/nas/sub/deep/deep-file.txt" "deep-nested"

# Test that assert_cached works on files placed directly into the cache
# directory (bypassing FUSE). This validates the cache path detection used
# by warmup's is_cached logic.
mkdir -p "$CACHE_DIR/vfs/nas"
echo -n "manually-placed" > "$CACHE_DIR/vfs/nas/manual-file.txt"
assert_cached "manual-file.txt"

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