#!/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() {
  local timestamp
  timestamp="$(date -u +"%Y-%m-%dT%H:%M:%SZ")"
  echo "[${timestamp}] $*"
}

log "=========================================================="
log " Sincronización y Publicación Maestra de Espejos MxOS"
log " Sesión tmux: mxos-sync"
log " Destino: ${STAGING_DIR}"
log "=========================================================="

# -------------------------------------------------------------------
# Paso 1: Sincronizar ISOs completas (Fedora Server/Workstation + CentOS)
# -------------------------------------------------------------------
log "==> [1/6] Sincronizando medios de instalación ISO..."

# 1.1 CentOS Stream 10 ISOs
centos_iso_dest="${STAGING_DIR}/centos-stream/10-stream/iso"
mkdir -p "${centos_iso_dest}"
log "INFO: Descargando CentOS Stream 10 ISOs (boot + dvd)..."
c10_base="https://mirror.stream.centos.org/10-stream/BaseOS/x86_64/iso"
for iso_file in \
  CentOS-Stream-10-latest-x86_64-boot.iso \
  CentOS-Stream-10-latest-x86_64-boot.iso.SHA256SUM \
  CentOS-Stream-10-latest-x86_64-boot.iso.manifest \
  CentOS-Stream-10-latest-x86_64-dvd1.iso \
  CentOS-Stream-10-latest-x86_64-dvd1.iso.SHA256SUM \
  CentOS-Stream-10-latest-x86_64-dvd1.iso.manifest; do
  log "    -> ${iso_file}..."
  curl -sL -C - --retry 5 --retry-delay 3 "${c10_base}/${iso_file}" -o "${centos_iso_dest}/${iso_file}"
done

# 1.2 Fedora ISOs (Server Netinst + Server DVD + Workstation Live)
for ver in 43 44 45; do
  f_dest="${STAGING_DIR}/fedora/iso/${ver}"
  mkdir -p "${f_dest}"
  
  up_prefix="releases"
  if [[ "${ver}" == "45" ]]; then
    up_prefix="development"
  fi

  log "INFO: Sincronizando Fedora ${ver} Server ISOs (netinst + DVD)..."
  rsync -avP --contimeout=30 --timeout=60 \
    --include="*.iso" --include="*CHECKSUM*" --include="*.manifest" --exclude="*" \
    "rsync://dl.fedoraproject.org/fedora-linux-${up_prefix}/${ver}/Server/x86_64/iso/" \
    "${f_dest}/" || true

  log "INFO: Sincronizando Fedora ${ver} Workstation Live ISOs..."
  rsync -avP --contimeout=30 --timeout=60 \
    --include="*.iso" --include="*CHECKSUM*" --include="*.manifest" --exclude="*" \
    "rsync://dl.fedoraproject.org/fedora-linux-${up_prefix}/${ver}/Workstation/x86_64/iso/" \
    "${f_dest}/" || true
done

# -------------------------------------------------------------------
# Paso 2: Finalizar descarga de Fedora 45 Everything con 10 descargas paralelas
# -------------------------------------------------------------------
log "==> [2/6] Descargando Fedora 45 Everything (10 paquetes simultáneos)..."
f45_dest="${STAGING_DIR}/fedora/releases/45/Everything/x86_64/os"
mkdir -p "${f45_dest}"

dnf5 --setopt=max_parallel_downloads=10 \
  --repofrompath="f45-everything,https://dl.fedoraproject.org/pub/fedora/linux/development/45/Everything/x86_64/os/" \
  --repo="f45-everything" reposync \
  --download-metadata \
  --norepopath \
  --destdir="${f45_dest}"

# -------------------------------------------------------------------
# Paso 3: Compilar documentación Sphinx y portales HTML
# -------------------------------------------------------------------
log "==> [3/6] Compilando documentación técnica Sphinx y portal principal..."
sphinx-build -W -b html "${REPO_ROOT}/docs" "${REPO_ROOT}/docs/_build/html"
mkdir -p "${STAGING_DIR}/docs"
cp -rf "${REPO_ROOT}/docs/_build/html/"* "${STAGING_DIR}/docs/"

"${SCRIPT_DIR}/mxos-build-html.bash"
"${SCRIPT_DIR}/mxos-sizes.bash" --update-readme

# -------------------------------------------------------------------
# Paso 4: Asegurar bloques web en el almacén interno de Kubo
# -------------------------------------------------------------------
log "==> [4/6] Resguardando recursos web y herramientas en el repositorio local de Kubo..."
ipfs add --cid-version=1 \
  "${REPO_ROOT}/index.html" \
  "${REPO_ROOT}/README.html"
ipfs add -r --cid-version=1 "${REPO_ROOT}/vigia"
ipfs add -r --cid-version=1 "${REPO_ROOT}/nodo"
ipfs add -r --cid-version=1 "${STAGING_DIR}/docs"

# -------------------------------------------------------------------
# Paso 5: Ingesta UnixFS filestore en Kubo
# -------------------------------------------------------------------
log "==> [5/6] Ingesta UnixFS filestore sobre ${STAGING_DIR}..."
ROOT_CID="$(ipfs add -r --nocopy --cid-version=1 --hash=sha2-256 -Q "${STAGING_DIR}")"
log "    CID raíz generado: ${ROOT_CID}"

ipfs pin add "${ROOT_CID}" || true

if ipfs files stat /mxos-root >/dev/null 2>&1; then
  ipfs files rm -r /mxos-root
fi
ipfs files cp "/ipfs/${ROOT_CID}" /mxos-root

# -------------------------------------------------------------------
# Paso 6: Publicación en Cloudflare DNSLink, IPNS y réplica en web0
# -------------------------------------------------------------------
log "==> [6/6] Publicando en DNSLink, IPNS y replicando a web0..."
"${SCRIPT_DIR}/mxos-dnslink-update.bash" "${ROOT_CID}" || true
"${SCRIPT_DIR}/mxos-ipns-publish.bash" "${ROOT_CID}" || true

# shellcheck disable=SC2029
ssh root@web0.mx-os.mx "ipfs --api=/ip4/127.0.0.1/tcp/5001 swarm connect /ip4/192.168.1.100/tcp/4001/p2p/$(ipfs id -f='<id>') || true"
# shellcheck disable=SC2029
ssh root@web0.mx-os.mx "ipfs --api=/ip4/127.0.0.1/tcp/5001 pin add ${ROOT_CID}/docs ${ROOT_CID}/index.html ${ROOT_CID}/README.html ${ROOT_CID}/vigia ${ROOT_CID}/nodo" || true

log "=========================================================="
log " Sincronización y publicación completadas con éxito."
log " CID activo: ${ROOT_CID}"
log "=========================================================="