#!/usr/bin/env bash
#
# ARGUS backup — dumps the database and application data (certificates,
# uploaded config) into a single, timestamped archive.
#
#   cd ~/argus && ./backup.sh [output-directory]
#
set -euo pipefail

INSTALL_DIR="${ARGUS_INSTALL_DIR:-$HOME/argus}"
OUT_DIR="${1:-$PWD}"
STAMP="$(date +%Y%m%d-%H%M%S)"
ARCHIVE="${OUT_DIR}/argus-backup-${STAMP}.tar.gz"

bold()  { printf '\033[1m%s\033[0m\n' "$1"; }
ok()    { printf '  \033[32m✓\033[0m %s\n' "$1"; }
fail()  { printf '  \033[31m✗\033[0m %s\n' "$1" >&2; exit 1; }

[ -f "$INSTALL_DIR/docker-compose.yml" ] || fail "No ARGUS installation found at $INSTALL_DIR (set ARGUS_INSTALL_DIR if you installed elsewhere)."
cd "$INSTALL_DIR"

bold "Backing up ARGUS..."

WORKDIR="$(mktemp -d)"
trap 'rm -rf "$WORKDIR"' EXIT

docker compose exec -T db pg_dump -U "${DB_USER:-postgres}" "${DB_NAME:-argus}" | gzip > "$WORKDIR/db.sql.gz"
ok "Database dumped"

docker run --rm -v argus_api_data:/data -v "$WORKDIR":/backup alpine \
  tar czf /backup/api-data.tar.gz -C /data . >/dev/null 2>&1
ok "Application data archived"

mkdir -p "$OUT_DIR"
tar czf "$ARCHIVE" -C "$WORKDIR" db.sql.gz api-data.tar.gz
ok "Backup written to ${ARCHIVE}"

echo
printf '  %s\n' "Restore with: ./restore.sh ${ARCHIVE}"