#!/usr/bin/bash
set -euo pipefail
IFS=$'\n\t'

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
if [[ -d "${SCRIPT_DIR}/../../.git" ]] || [[ -f "${SCRIPT_DIR}/../../nodo/config/etc/mirrors.env" ]]; then
  REPO_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"
else
  REPO_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
fi

if [[ -f "${REPO_ROOT}/nodo/config/etc/mirrors.env" ]]; then
  # shellcheck source=/dev/null
  source "${REPO_ROOT}/nodo/config/etc/mirrors.env"
elif [[ -f "${REPO_ROOT}/config/etc/mirrors.env" ]]; then
  # shellcheck source=/dev/null
  source "${REPO_ROOT}/config/etc/mirrors.env"
elif [[ -f "${REPO_ROOT}/etc/mirrors.env" ]]; then
  # shellcheck source=/dev/null
  source "${REPO_ROOT}/etc/mirrors.env"
fi

STAGING_DIR="${MIRRORS_STAGING_DIR:-$HOME/ipfs/staging}"
LOG_DIR="${MIRRORS_LOG_DIR:-$HOME/ipfs/logs}"
mkdir -p "${STAGING_DIR}" "${LOG_DIR}"

LOG_FILE="${LOG_DIR}/fedora-updates-sync-$(date +%Y%m%d-%H%M%S).log"

log() {
  local timestamp
  timestamp="$(date -u +"%Y-%m-%dT%H:%M:%SZ")"
  echo "[${timestamp}] $*" | tee -a "${LOG_FILE}"
}

sync_update_repo() {
  local ver="$1"
  local dest_x86="${STAGING_DIR}/fedora/linux/updates/${ver}/Everything/x86_64"
  local url="https://dl.fedoraproject.org/pub/fedora/linux/updates/${ver}/Everything/x86_64/"
  local repo_id="f${ver}-updates"

  mkdir -p "${dest_x86}"

  local retries=3
  local attempt=1
  while [[ ${attempt} -le ${retries} ]]; do
    log "INFO: Sincronizando Fedora ${ver} Updates desde ${url} (intento ${attempt}/${retries})..."
    if dnf5 --setopt=max_parallel_downloads="${MAX_PARALLEL_DOWNLOADS:-10}" \
      --setopt=minrate="${DNF_MINRATE:-1024}" \
      --setopt=timeout="${DNF_TIMEOUT:-120}" \
      --repofrompath="${repo_id},${url}" \
      --repo="${repo_id}" reposync \
      --download-metadata \
      --norepopath \
      --destdir="${dest_x86}" \
      --delete 2>&1 | tee -a "${LOG_FILE}"; then
      log "INFO: Sincronización exitosa de Fedora ${ver} Updates."
      break
    fi
    log "WARN: Intento ${attempt} de reposync falló por inestabilidad de red. Reintentando en 10s..."
    sleep 10
    ((attempt++))
    if [[ ${attempt} -gt ${retries} ]]; then
      log "ERROR: Se superó el límite de reintentos para Fedora ${ver}."
      return 1
    fi
  done

  # Crear enlaces de conveniencia y retrocompatibilidad
  local compat_os="${dest_x86}/os"
  if [[ ! -e "${compat_os}" ]]; then
    ln -s "." "${compat_os}"
  fi
  local compat_link="${STAGING_DIR}/fedora/linux/updates/${ver}/x86_64"
  if [[ ! -e "${compat_link}" ]]; then
    ln -s "Everything/x86_64" "${compat_link}"
    log "INFO: Enlace de compatibilidad creado: ${compat_link} -> Everything/x86_64"
  fi
}

main() {
  log "=========================================================="
  log " Inicio de Sincronización de Actualizaciones Fedora (updates)"
  log " Destino: ${STAGING_DIR}/fedora/linux/updates"
  log " Log: ${LOG_FILE}"
  log "=========================================================="

  # 1. Fedora 43 Updates (~60 GB)
  sync_update_repo "43"

  # 2. Fedora 44 Updates (~53 GB)
  sync_update_repo "44"

  # 3. Fedora 45 Updates (0 GB, inicialización de metadatos)
  sync_update_repo "45"

  log "INFO: Actualizaciones sincronizadas. Regenerando tamaños y portales..."
  "${SCRIPT_DIR}/mxos-build-html.bash" 2>&1 | tee -a "${LOG_FILE}"

  log "INFO: Ingesta UnixFS desacoplada y publicación en IPFS..."
  local root_cid
  root_cid="$("${SCRIPT_DIR}/mxos-mirror-ingest.bash" --nocopy "${STAGING_DIR}")"
  log "INFO: Nuevo CID raíz: ${root_cid}"

  log "INFO: Actualizando DNSLink y publicando IPNS..."
  "${SCRIPT_DIR}/mxos-dnslink-update.bash" "${root_cid}" 2>&1 | tee -a "${LOG_FILE}" || true
  "${SCRIPT_DIR}/mxos-ipns-publish.bash" "${root_cid}" 2>&1 | tee -a "${LOG_FILE}" || true

  log "INFO: Enclavillando activos web esenciales en web0.mx-os.mx..."
  # shellcheck disable=SC2029
  ssh root@web0.mx-os.mx "ipfs --api=/ip4/127.0.0.1/tcp/5001 pin add ${root_cid}/index.html ${root_cid}/README.html ${root_cid}/docs ${root_cid}/cover.jpg" || true
  ssh root@web0.mx-os.mx "systemctl restart ipfs" || true

  log "=========================================================="
  log " Sincronización de Fedora Updates completada con éxito."
  log " CID activo: ${root_cid}"
  log "=========================================================="
}

main "$@"