#!/bin/bash
# ==========================================================
# adn/tools/bkps/cron-bkps.sh — Wrapper cron para backups
# ----------------------------------------------------------
# Ejecuta un comando bkps con:
#   - Lockfile (evita ejecuciones simultáneas)
#   - Bitácora automática vía dron  
#   - Logging de salida
#
# Uso en crontab:
#   0 2 * * * /ruta/adn/tools/bkps/cron-bkps.sh C4
#   0 3 * * * /ruta/adn/tools/bkps/cron-bkps.sh T3
#
# Ejemplo manual:
#   ./adn/tools/bkps/cron-bkps.sh C4 "Pipeline nocturno C4"
# ==========================================================

set -euo pipefail

# ─── Configuración ─────────────────────────────────────────
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../../.." && pwd)"
ADN_RUN="$PROJECT_ROOT/adn/tools/run"
LOCK_DIR="$PROJECT_ROOT/tmp/locks"
LOG_DIR="$PROJECT_ROOT/tmp/logs/bkps"

mkdir -p "$LOCK_DIR" "$LOG_DIR"

# ─── Argumentos ────────────────────────────────────────────
REF="${1:-}"
NOTA="${2:-Cron: bkps run $REF --batch}"
AMBITO="dtic-BKPs"
NODO="srv-ns8"

if [ -z "$REF" ]; then
  echo "✗ Uso: cron-bkps.sh <T1|C1|ID> [nota]"
  exit 1
fi

# ─── Lockfile ──────────────────────────────────────────────
LOCKFILE="$LOCK_DIR/bkps_${REF}.lock"

if [ -f "$LOCKFILE" ]; then
  PID_LOCK=$(cat "$LOCKFILE")
  if kill -0 "$PID_LOCK" 2>/dev/null; then
    echo "⚠ bkps $REF ya está corriendo (PID: $PID_LOCK, lock: $LOCKFILE)"
    exit 0  # No es error, simplemente ya está corriendo
  else
    echo "ℹ Lock stale removido (PID $PID_LOCK ya no existe)"
    rm -f "$LOCKFILE"
  fi
fi

echo $$ > "$LOCKFILE"
trap 'rm -f "$LOCKFILE"' EXIT

# ─── Log ───────────────────────────────────────────────────
FECHA=$(date +%Y-%m-%d)
HORA=$(date +%H:%M)
LOGFILE="$LOG_DIR/bkps_${REF}_${FECHA}_${HORA//:/}.log"

echo "[$(date)] cron-bkps: Iniciando $REF" >> "$LOGFILE"

# ─── Bitácora + Ejecución via Dron ──────────────────────
# Crear evento
EVENTO_ID=$("$ADN_RUN" db evento:crear \
  --ambito "$AMBITO" \
  --nodo "$NODO" \
  --descripcion "$NOTA" \
  --inicio "$HORA" \
  --modo R --ia 2>&1 | grep -oP 'ID \K\d+' | tail -1)

if [ -z "$EVENTO_ID" ]; then
  echo "[$(date)] cron-bkps: ⚠ No se pudo crear evento, ejecutando sin bitácora" >> "$LOGFILE"
  "$ADN_RUN" bkps run "$REF" --batch >> "$LOGFILE" 2>&1
  EXIT_CODE=$?
else
  echo "[$(date)] cron-bkps: Evento #$EVENTO_ID creado, delegando al dron" >> "$LOGFILE"
  "$ADN_RUN" dron lanzar \
    --evento "$EVENTO_ID" \
    --nota "$NOTA" \
    -- "$ADN_RUN" bkps run "$REF" --batch >> "$LOGFILE" 2>&1
  EXIT_CODE=$?
fi

echo "[$(date)] cron-bkps: Finalizado con código $EXIT_CODE" >> "$LOGFILE"
exit $EXIT_CODE