#!/bin/bash
# Script de deploy para servidor remoto
# Uso: ./deploy.sh [production|staging]

set -e

# ============================================
# CONFIGURACIÓN
# ============================================
ENV=${1:-production}
REGISTRY="${REGISTRY:-ghcr.io}"
PROJECT="${PROJECT:-myapp}"
VERSION="${VERSION:-latest}"

# Servidor remoto
REMOTE_USER="${REMOTE_USER:-deploy}"
REMOTE_HOST="${REMOTE_HOST:-server.example.com}"
REMOTE_PATH="${REMOTE_PATH:-/opt/$PROJECT}"

# Colores
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

log() { echo -e "${GREEN}[INFO]${NC} $1"; }
warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
error() { echo -e "${RED}[ERROR]${NC} $1"; exit 1; }

# ============================================
# VALIDACIONES
# ============================================
log "Validando configuración..."

if ! command -v docker &> /dev/null; then
    error "Docker no está instalado"
fi

if [ -z "$REMOTE_HOST" ] || [ "$REMOTE_HOST" = "server.example.com" ]; then
    error "Configura REMOTE_HOST antes de ejecutar"
fi

# ============================================
# BUILD
# ============================================
log "Building imágenes para $ENV..."

# Build con buildkit para mejor cache
export DOCKER_BUILDKIT=1

docker build -t $REGISTRY/$PROJECT-frontend:$VERSION ./frontend
docker build -t $REGISTRY/$PROJECT-backend:$VERSION ./backend

log "Imágenes construidas:"
docker images | grep $PROJECT

# ============================================
# PUSH A REGISTRY
# ============================================
log "Pushing imágenes a $REGISTRY..."

docker push $REGISTRY/$PROJECT-frontend:$VERSION
docker push $REGISTRY/$PROJECT-backend:$VERSION

log "Imágenes subidas correctamente"

# ============================================
# DEPLOY A SERVIDOR
# ============================================
log "Desplegando a $REMOTE_HOST..."

# Copiar docker-compose si no existe
ssh $REMOTE_USER@$REMOTE_HOST "mkdir -p $REMOTE_PATH"
scp docker-compose.yml $REMOTE_USER@$REMOTE_HOST:$REMOTE_PATH/

# Copiar .env si existe
if [ -f ".env.$ENV" ]; then
    scp .env.$ENV $REMOTE_USER@$REMOTE_HOST:$REMOTE_PATH/.env
fi

# Deploy remoto
ssh $REMOTE_USER@$REMOTE_HOST << EOF
    cd $REMOTE_PATH

    # Pull nuevas imágenes
    docker compose pull

    # Restart servicios
    docker compose up -d --remove-orphans

    # Limpiar imágenes antiguas
    docker image prune -f

    # Verificar estado
    docker compose ps
EOF

# ============================================
# VERIFICACIÓN
# ============================================
log "Verificando deploy..."

sleep 5

# Healthcheck
HTTP_STATUS=$(curl -s -o /dev/null -w "%{http_code}" https://$REMOTE_HOST/health || echo "000")

if [ "$HTTP_STATUS" = "200" ]; then
    log "Deploy exitoso! Servidor respondiendo correctamente."
else
    warn "Servidor respondió con código: $HTTP_STATUS"
    warn "Verifica los logs: ssh $REMOTE_USER@$REMOTE_HOST 'docker compose -f $REMOTE_PATH/docker-compose.yml logs'"
fi

log "Deploy completado para $ENV"