#!/bin/bash
# backup-netgescon.sh - Script backup completo NetGescon

set -e

# Configurazione
BACKUP_DIR="/var/backups/netgescon"
PROJECT_DIR="/var/www/netgescon"
DB_NAME="netgescon"
DB_USER="netgescon_user"
DB_PASS="NetGescon2024!"
DATE=$(date +%Y%m%d_%H%M%S)
RETENTION_DAYS=7

# Colori per output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

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 Backup Script"
echo "=========================="
echo "Data: $(date)"
echo "Backup ID: $DATE"
echo ""

# Verifica privilegi
if [[ $EUID -eq 0 ]]; then
   log_warn "Eseguito come root - OK per backup completo"
else
   log_info "Eseguito come utente normale"
fi

log_step "1/6 Creazione directory backup..."
sudo mkdir -p $BACKUP_DIR
log_info "Directory backup: $BACKUP_DIR"

log_step "2/6 Backup database MySQL..."
if mysqldump -u $DB_USER -p$DB_PASS $DB_NAME > $BACKUP_DIR/netgescon_db_$DATE.sql 2>/dev/null; then
    DB_SIZE=$(du -h $BACKUP_DIR/netgescon_db_$DATE.sql | cut -f1)
    log_info "Database backup completato: $DB_SIZE"
else
    log_error "Errore nel backup database"
    exit 1
fi

log_step "3/6 Backup file applicazione..."
if sudo tar -czf $BACKUP_DIR/netgescon_files_$DATE.tar.gz -C $PROJECT_DIR . 2>/dev/null; then
    FILES_SIZE=$(du -h $BACKUP_DIR/netgescon_files_$DATE.tar.gz | cut -f1)
    log_info "File backup completato: $FILES_SIZE"
else
    log_error "Errore nel backup file"
    exit 1
fi

log_step "4/6 Backup configurazioni sistema..."
sudo tar -czf $BACKUP_DIR/netgescon_config_$DATE.tar.gz \
    /etc/nginx/sites-available/netgescon \
    /etc/php/8.2/fpm/pool.d/www.conf \
    /etc/mysql/mysql.conf.d/mysqld.cnf \
    ~/netgescon-setup-info.txt 2>/dev/null || true

CONFIG_SIZE=$(du -h $BACKUP_DIR/netgescon_config_$DATE.tar.gz | cut -f1)
log_info "Configurazioni backup completate: $CONFIG_SIZE"

log_step "5/6 Creazione manifest backup..."
cat > $BACKUP_DIR/netgescon_manifest_$DATE.txt <<EOF
NetGescon Backup Manifest
========================

Backup ID: $DATE
Data: $(date)
Sistema: $(lsb_release -d | cut -f2)
Hostname: $(hostname)
IP: $(hostname -I | awk '{print $1}')

File inclusi:
- Database: netgescon_db_$DATE.sql ($DB_SIZE)
- Applicazione: netgescon_files_$DATE.tar.gz ($FILES_SIZE)
- Configurazioni: netgescon_config_$DATE.tar.gz ($CONFIG_SIZE)

Directory sorgente: $PROJECT_DIR
Database: $DB_NAME
Utente DB: $DB_USER

Versioni:
- Laravel: $(cd $PROJECT_DIR/netgescon-laravel && php artisan --version 2>/dev/null || echo "N/A")
- PHP: $(php -v | head -1)
- MySQL: $(mysql --version)
- Nginx: $(nginx -v 2>&1)

Note:
Per ripristinare:
1. Estrarre netgescon_files_$DATE.tar.gz in $PROJECT_DIR
2. Importare netgescon_db_$DATE.sql in MySQL
3. Ripristinare configurazioni da netgescon_config_$DATE.tar.gz
4. Riavviare servizi: nginx, php8.2-fpm, mysql

Creato da: $(whoami)@$(hostname)
EOF

log_info "Manifest creato: netgescon_manifest_$DATE.txt"

log_step "6/6 Pulizia backup vecchi (>$RETENTION_DAYS giorni)..."
DELETED_COUNT=0

# Rimozione file vecchi
for pattern in "netgescon_db_*.sql" "netgescon_files_*.tar.gz" "netgescon_config_*.tar.gz" "netgescon_manifest_*.txt"; do
    DELETED=$(find $BACKUP_DIR -name "$pattern" -mtime +$RETENTION_DAYS -delete -print | wc -l)
    DELETED_COUNT=$((DELETED_COUNT + DELETED))
done

if [ $DELETED_COUNT -gt 0 ]; then
    log_info "Rimossi $DELETED_COUNT file backup vecchi"
else
    log_info "Nessun file backup vecchio da rimuovere"
fi

# Calcolo dimensione totale backup
TOTAL_SIZE=$(du -sh $BACKUP_DIR | cut -f1)

echo ""
echo "═══════════════════════════════════════════════════════"
echo "✅ BACKUP COMPLETATO!"
echo "═══════════════════════════════════════════════════════"
echo ""
echo "📁 DIRECTORY BACKUP: $BACKUP_DIR"
echo "📦 DIMENSIONE TOTALE: $TOTAL_SIZE"
echo "🗓️  ID BACKUP: $DATE"
echo ""
echo "📄 FILE CREATI:"
echo "   - netgescon_db_$DATE.sql ($DB_SIZE)"
echo "   - netgescon_files_$DATE.tar.gz ($FILES_SIZE)"
echo "   - netgescon_config_$DATE.tar.gz ($CONFIG_SIZE)"
echo "   - netgescon_manifest_$DATE.txt"
echo ""
echo "🧹 FILE RIMOSSI: $DELETED_COUNT (>$RETENTION_DAYS giorni)"
echo ""
echo "═══════════════════════════════════════════════════════"
echo ""
echo "🔄 RIPRISTINO BACKUP:"
echo ""
echo "1️⃣  DATABASE:"
echo "    mysql -u $DB_USER -p $DB_NAME < $BACKUP_DIR/netgescon_db_$DATE.sql"
echo ""
echo "2️⃣  FILE APPLICAZIONE:"
echo "    cd $PROJECT_DIR && sudo tar -xzf $BACKUP_DIR/netgescon_files_$DATE.tar.gz"
echo ""
echo "3️⃣  CONFIGURAZIONI:"
echo "    sudo tar -xzf $BACKUP_DIR/netgescon_config_$DATE.tar.gz -C /"
echo ""
echo "4️⃣  RIAVVIO SERVIZI:"
echo "    sudo systemctl restart nginx php8.2-fpm mysql"
echo ""

# Log backup nel file di sistema
echo "$(date): Backup NetGescon completato - ID: $DATE" >> /var/log/netgescon-backup.log

log_info "Backup registrato in: /var/log/netgescon-backup.log"