#!/usr/bin/env bash
set -euo pipefail

REMOTE_HOST="${REMOTE_HOST:-player@shineup.me}"
ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../../.." && pwd)"
TODAY="$(date +%F)"
DEST_NAME="${DEST_NAME:-${TODAY}}"
DEST_DIR="${ROOT_DIR}/archive/${DEST_NAME}"
RSYNC_REMOTE_SUDO=(--rsync-path="sudo -n rsync")

mkdir -p "${DEST_DIR}"

remote_exists() {
  ssh "${REMOTE_HOST}" "test -e '$1'"
}

copy_optional_dir() {
  local remote_path="$1"
  local local_path="$2"
  if remote_exists "$remote_path"; then
    rsync -aH --delete "${RSYNC_REMOTE_SUDO[@]}" "${REMOTE_HOST}:${remote_path}/" "${local_path}/"
  else
    mkdir -p "${local_path}"
    echo "missing: ${remote_path}" > "${local_path}/MISSING.txt"
  fi
}

copy_optional_file() {
  local remote_path="$1"
  local local_path="$2"
  if remote_exists "$remote_path"; then
    rsync -aH "${RSYNC_REMOTE_SUDO[@]}" "${REMOTE_HOST}:${remote_path}" "${local_path}"
  else
    mkdir -p "$(dirname "${local_path}")"
    echo "missing: ${remote_path}" > "${local_path}.MISSING.txt"
  fi
}

echo "[1/4] Создаю структуру бэкапа: ${DEST_DIR}"
mkdir -p "${DEST_DIR}/home-player" "${DEST_DIR}/etc-system" "${DEST_DIR}/var-lib/docker-images"

echo "[2/4] Копирую основные данные /home/player"
rsync -aH --delete \
  "${RSYNC_REMOTE_SUDO[@]}" \
  --exclude='SHiNE/shine-server/logs/' \
  --exclude='SHiNE/**/.elaira_logs/' \
  --exclude='**/*.log' \
  "${REMOTE_HOST}:/home/player/SHiNE/" "${DEST_DIR}/home-player/SHiNE/"

copy_optional_dir "/home/player/sites" "${DEST_DIR}/home-player/sites"
copy_optional_dir "/home/player/gitea" "${DEST_DIR}/home-player/gitea"
copy_optional_dir "/home/player/agent-memory" "${DEST_DIR}/home-player/agent-memory"

echo "[3/4] Копирую системные конфиги"
copy_optional_dir "/etc/caddy" "${DEST_DIR}/etc-system/caddy"
copy_optional_dir "/var/lib/caddy" "${DEST_DIR}/var-lib/caddy"
copy_optional_file "/etc/turnserver.conf" "${DEST_DIR}/etc-system/turnserver.conf"
copy_optional_file "/etc/systemd/system/shine-server.service" "${DEST_DIR}/etc-system/shine-server.service"
copy_optional_file "/etc/systemd/system/agent-memory.service" "${DEST_DIR}/etc-system/agent-memory.service"
if ssh "${REMOTE_HOST}" 'command -v docker >/dev/null 2>&1 && sudo -n docker image inspect gitea/gitea:1.22.6 >/dev/null 2>&1'; then
  ssh "${REMOTE_HOST}" 'sudo -n docker image save gitea/gitea:1.22.6' > "${DEST_DIR}/var-lib/docker-images/gitea_gitea_1.22.6.tar"
else
  echo "missing: docker image gitea/gitea:1.22.6" > "${DEST_DIR}/var-lib/docker-images/gitea_gitea_1.22.6.tar.MISSING.txt"
fi

echo "[4/4] Создаю манифест"
{
  echo "backup_date=${TODAY}"
  echo "remote_host=${REMOTE_HOST}"
  echo "created_at_utc=$(date -u +%Y-%m-%dT%H:%M:%SZ)"
  echo
  echo "sizes:"
  du -sh "${DEST_DIR}/home-player/SHiNE" || true
  du -sh "${DEST_DIR}/home-player/sites" || true
  du -sh "${DEST_DIR}/home-player/gitea" || true
  du -sh "${DEST_DIR}/home-player/agent-memory" || true
  du -sh "${DEST_DIR}/etc-system" || true
  du -sh "${DEST_DIR}/var-lib/caddy" || true
  du -sh "${DEST_DIR}/var-lib/docker-images" || true
  echo
  echo "total:"
  du -sh "${DEST_DIR}" || true
} > "${DEST_DIR}/MANIFEST.txt"

echo "Готово: ${DEST_DIR}"