#!/bin/bash
set -e

# ----------------------------------------------------------------------------------------------
# --------------------------- ZFS ARC & Memory Snapshot for Unraid -----------------------------
# ----------------------------------------------------------------------------------------------

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/../common.sh"

# Load central config
load_master_conf

# Parse CLI args (supports --dry-run)
parse_args "$@"

# Functions
show_zfs_arc() {
    echo "--- ARC / Metadata Stats ---"
    grep -iE '^(c|meta|arc_meta_used|demand_metadata_misses|mru_ghost_metadata|mfu_ghost_metadata)' /proc/spl/kstat/zfs/arcstats
}

show_memory_status() {
    echo "--- Memory Status ---"
    free -h | awk 'NR==1 || /Mem:/'
}

# MAIN
echo "===== ZFS ARC & Memory Snapshot: $(date) ====="

if [ "$DRY_RUN" = true ]; then
    echo "[DRY-RUN] Would display ARC and memory stats"
else
    echo ""
    show_zfs_arc
    echo ""
    show_memory_status
fi

echo "=============================================="