#!/bin/sh
# Backup the runtime volume (signals, snapshots, corpus_summary).
# Usage: ./scripts/backup_runtime.sh [dest_dir]
set -e

SRC="${TAU_RAG_RUNTIME_DIR:-/app/runtime}"
DST="${1:-/backups/tau-rag/$(date -u +%Y%m%dT%H%M%SZ)}"

if [ ! -d "$SRC" ]; then
    echo "Runtime dir not found: $SRC" >&2
    exit 1
fi

mkdir -p "$DST"
tar -czf "$DST/runtime.tar.gz" -C "$SRC" .
echo "Backed up $SRC → $DST/runtime.tar.gz"

# Optional: rotate — keep last 14 days
if [ -n "$TAU_RAG_BACKUP_RETENTION_DAYS" ]; then
    find "$(dirname "$DST")" -maxdepth 1 -type d \
        -mtime "+$TAU_RAG_BACKUP_RETENTION_DAYS" \
        -exec rm -rf {} + 2>/dev/null || true
fi