#!/bin/bash
# vm-sync-strategy.sh - Sincronizzazione intelligente tra VM NetGescon

set -e

# Configurazione ambiente
PROD_HOST="192.168.1.100"
DEV_HOST="192.168.1.101"
CLIENT_HOST="192.168.1.102"
SSH_USER="netgescon"
PROJECT_PATH="/var/www/netgescon/netgescon-laravel"

# Colori per output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m'

log_info() { echo -e "${GREEN}[INFO]${NC} $1"; }
log_warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
log_error() { echo -e "${RED}[ERROR]${NC} $1"; }
log_step() { echo -e "${BLUE}[STEP]${NC} $1"; }

echo "🔄 NetGescon VM Sync Strategy"
echo "============================="

# Funzione per eseguire comandi remoti
run_remote() {
    local host=$1
    local command=$2
    ssh -o ConnectTimeout=10 $SSH_USER@$host "$command"
}

# Funzione per sincronizzare codice
sync_code() {
    local source_host=$1
    local target_host=$2
    local direction=$3
    
    log_step "Sincronizzazione codice: $direction"
    
    # Esclusioni per rsync
    local excludes="--exclude=storage/logs/* --exclude=storage/cache/* --exclude=.env --exclude=vendor/ --exclude=node_modules/"
    
    # Sync via rsync
    rsync -avz --delete $excludes \
        $SSH_USER@$source_host:$PROJECT_PATH/ \
        $SSH_USER@$target_host:$PROJECT_PATH/
    
    # Reinstalla dipendenze sul target
    run_remote $target_host "cd $PROJECT_PATH && composer install --no-dev --optimize-autoloader"
    run_remote $target_host "cd $PROJECT_PATH && npm install && npm run build"
    
    log_info "Sincronizzazione completata: $direction"
}

# Funzione per backup database
backup_database() {
    local host=$1
    local backup_name=$2
    
    log_step "Backup database da $host"
    
    run_remote $host "mysqldump -u netgescon_user -pNetGescon2024! netgescon > /tmp/$backup_name.sql"
    scp $SSH_USER@$host:/tmp/$backup_name.sql ./backups/
    
    log_info "Database backup salvato: ./backups/$backup_name.sql"
}

# Funzione per ripristino database
restore_database() {
    local host=$1
    local backup_file=$2
    
    log_step "Ripristino database su $host"
    
    scp ./backups/$backup_file $SSH_USER@$host:/tmp/
    run_remote $host "mysql -u netgescon_user -pNetGescon2024! netgescon < /tmp/$backup_file"
    
    log_info "Database ripristinato su $host"
}

# Menu principale
show_menu() {
    echo ""
    echo "═══════════════════════════════════════════════════════"
    echo "🔄 NETGESCON VM SYNC MENU"
    echo "═══════════════════════════════════════════════════════"
    echo ""
    echo "SINCRONIZZAZIONE CODICE:"
    echo "1) PROD → DEV  (Aggiorna ambiente sviluppo)"
    echo "2) DEV → PROD  (Deploy sviluppo in produzione)"
    echo "3) PROD → CLIENT (Aggiorna cliente test)"
    echo "4) DEV → CLIENT (Test sviluppo su cliente)"
    echo ""
    echo "GESTIONE DATABASE:"
    echo "5) Backup DB PROD"
    echo "6) PROD DB → DEV"
    echo "7) PROD DB → CLIENT"
    echo "8) Ripristina DB da backup"
    echo ""
    echo "OPERAZIONI SPECIALI:"
    echo "9) Health check tutte le VM"
    echo "10) Setup SSH keys"
    echo "11) Deploy completo PROD → DEV + CLIENT"
    echo "12) Rollback emergency"
    echo ""
    echo "0) Esci"
    echo ""
    read -p "Scegli operazione: " choice
}

# Implementazione menu
case_handler() {
    case $1 in
        1)
            log_info "Sincronizzazione PROD → DEV"
            sync_code $PROD_HOST $DEV_HOST "PRODUCTION to DEVELOPMENT"
            ;;
        2)
            log_warn "ATTENZIONE: Deploy in PRODUZIONE"
            read -p "Confermi il deploy DEV → PROD? (y/N): " confirm
            if [[ $confirm == "y" || $confirm == "Y" ]]; then
                backup_database $PROD_HOST "prod_backup_$(date +%Y%m%d_%H%M%S)"
                sync_code $DEV_HOST $PROD_HOST "DEVELOPMENT to PRODUCTION"
            fi
            ;;
        3)
            log_info "Sincronizzazione PROD → CLIENT"
            sync_code $PROD_HOST $CLIENT_HOST "PRODUCTION to CLIENT"
            ;;
        4)
            log_info "Sincronizzazione DEV → CLIENT"
            sync_code $DEV_HOST $CLIENT_HOST "DEVELOPMENT to CLIENT"
            ;;
        5)
            backup_name="prod_manual_$(date +%Y%m%d_%H%M%S)"
            backup_database $PROD_HOST $backup_name
            ;;
        6)
            log_info "Sincronizzazione DB PROD → DEV"
            backup_database $PROD_HOST "temp_prod_to_dev"
            restore_database $DEV_HOST "temp_prod_to_dev.sql"
            ;;
        7)
            log_info "Sincronizzazione DB PROD → CLIENT"
            backup_database $PROD_HOST "temp_prod_to_client"
            restore_database $CLIENT_HOST "temp_prod_to_client.sql"
            ;;
        9)
            log_info "Health check di tutte le VM"
            for host in $PROD_HOST $DEV_HOST $CLIENT_HOST; do
                if run_remote $host "systemctl is-active nginx mysql php8.2-fpm" &>/dev/null; then
                    log_info "$host: OK"
                else
                    log_error "$host: PROBLEMI"
                fi
            done
            ;;
        10)
            log_info "Setup SSH keys per accesso automatico"
            ssh-keygen -t rsa -b 4096 -f ~/.ssh/netgescon_rsa -N ""
            for host in $PROD_HOST $DEV_HOST $CLIENT_HOST; do
                ssh-copy-id -i ~/.ssh/netgescon_rsa.pub $SSH_USER@$host
            done
            ;;
        11)
            log_info "Deploy completo PROD → DEV + CLIENT"
            backup_database $PROD_HOST "full_deploy_$(date +%Y%m%d_%H%M%S)"
            sync_code $PROD_HOST $DEV_HOST "PROD to DEV"
            sync_code $PROD_HOST $CLIENT_HOST "PROD to CLIENT"
            restore_database $DEV_HOST "full_deploy_$(date +%Y%m%d_%H%M%S).sql"
            restore_database $CLIENT_HOST "full_deploy_$(date +%Y%m%d_%H%M%S).sql"
            ;;
        0)
            log_info "Uscita dal programma"
            exit 0
            ;;
        *)
            log_error "Opzione non valida"
            ;;
    esac
}

# Creazione directory backup
mkdir -p ./backups

# Loop principale
while true; do
    show_menu
    case_handler $choice
    echo ""
    read -p "Premi ENTER per continuare..."
done