#!/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

# Cargar configuración
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="/srv/ipfs/staging"
LOG_DIR="/srv/ipfs/logs"
LOG_FILE="${LOG_DIR}/pilot-sync-$(date +%Y%m%d-%H%M%S).log"

mkdir -p "${STAGING_DIR}" "${LOG_DIR}"

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

log "INFO: ========================================================"
log "INFO: Iniciando Sincronización Piloto de Espejos MxOS"
log "INFO: Destino: ${STAGING_DIR}"
log "INFO: Log: ${LOG_FILE}"
log "INFO: ========================================================"

# 1. Fedora 43 Server Netinstall ISO y firmas
FEDORA_ISO_DIR="${STAGING_DIR}/fedora/iso/43"
mkdir -p "${FEDORA_ISO_DIR}"
log "INFO: [1/6] Sincronizando Fedora 43 Server Netinstall ISO y CHECKSUM..."
rsync -avP --contimeout=30 \
  --include="Fedora-Server-netinst-x86_64-43-1.6.iso" \
  --include="Fedora-Server-43-1.6-x86_64-CHECKSUM" \
  --include="*.manifest" \
  --exclude="*" \
  rsync://dl.fedoraproject.org/fedora-linux-releases/43/Server/x86_64/iso/ \
  "${FEDORA_ISO_DIR}/" 2>&1 | tee -a "${LOG_FILE}"

# 2. Fedora 43 Everything Repodata
FEDORA_REPODATA_DIR="${STAGING_DIR}/fedora/releases/43/Everything/x86_64/os/repodata"
mkdir -p "${FEDORA_REPODATA_DIR}"
log "INFO: [2/6] Sincronizando metadatos (repodata) de Fedora 43 Everything..."
rsync -avP --contimeout=30 --delete-delay \
  rsync://dl.fedoraproject.org/fedora-linux-releases/43/Everything/x86_64/os/repodata/ \
  "${FEDORA_REPODATA_DIR}/" 2>&1 | tee -a "${LOG_FILE}"

# 3. CentOS Stream 10 BaseOS Repodata
CENTOS_REPODATA_DIR="${STAGING_DIR}/centos-stream/10-stream/BaseOS/x86_64/os/repodata"
mkdir -p "${CENTOS_REPODATA_DIR}"
log "INFO: [3/6] Sincronizando metadatos (repodata) de CentOS Stream 10 BaseOS..."
BASE_URL="https://mirror.stream.centos.org/10-stream/BaseOS/x86_64/os/repodata"
curl -4 -s "${BASE_URL}/repomd.xml" -o "${CENTOS_REPODATA_DIR}/repomd.xml"
HREFS="$(grep -o 'href="repodata/[^"]*"' "${CENTOS_REPODATA_DIR}/repomd.xml" | cut -d'"' -f2 | sed 's|^repodata/||' || true)"

for file in ${HREFS}; do
  log "INFO: Descargando CentOS metadato: ${file}"
  curl -4 -s -L "${BASE_URL}/${file}" -o "${CENTOS_REPODATA_DIR}/${file}"
done

# 4. Asegurar portal web y directorio nodo en la raíz de staging
log "INFO: [4/6] Actualizando portal web y directorio nodo en la raíz de staging..."
"${SCRIPT_DIR}/mxos-build-html.bash" >/dev/null 2>&1 || true

# 5. Ingesta UnixFS por referencia con Filestore en Kubo
log "INFO: [5/6] Ingestando grafo UnixFS en Kubo local (filestore --nocopy)..."
ROOT_CID="$(ipfs add -r --nocopy --cid-version=1 --hash=sha2-256 -Q "${STAGING_DIR}")"
log "INFO: Nuevo CID raíz generado: ${ROOT_CID}"

# Pineo local para asegurar persistencia
ipfs pin add "${ROOT_CID}" >/dev/null 2>&1 || true

# 6. Actualización en Cloudflare DNSLink y replicación
log "INFO: [6/6] Actualizando DNSLink en Cloudflare y replicando hacia web0.mx-os.mx..."
"${SCRIPT_DIR}/mxos-dnslink-update.bash" "${ROOT_CID}" 2>&1 | tee -a "${LOG_FILE}"

log "INFO: Replicando DAG hacia web0.mx-os.mx..."
# shellcheck disable=SC2029
ipfs dag export "${ROOT_CID}" | ssh root@web0.mx-os.mx \
  "ipfs --api=/ip4/127.0.0.1/tcp/5001 dag import" 2>&1 | tee -a "${LOG_FILE}"

# Verificación final
log "INFO: Verificando disponibilidad pública del espejo..."
HTTP_CODE="$(curl -4 -s -o /dev/null -w "%{http_code}" "https://mirrors.mx-os.mx/index.html" || echo "ERR")"
ISO_CODE="$(curl -4 -s -o /dev/null -w "%{http_code}" "https://mirrors.mx-os.mx/fedora/iso/43/Fedora-Server-43-1.6-x86_64-CHECKSUM" || echo "ERR")"

log "INFO: https://mirrors.mx-os.mx/index.html -> HTTP ${HTTP_CODE}"
log "INFO: https://mirrors.mx-os.mx/fedora/iso/43/CHECKSUM -> HTTP ${ISO_CODE}"

echo "${ROOT_CID}" > "${STAGING_DIR}/.synced"
log "INFO: ========================================================"
log "INFO: Sincronización piloto finalizada exitosamente."
log "INFO: CID raíz activo: ${ROOT_CID}"
log "INFO: ========================================================"