#!/bin/bash
set -e

# Script di deployment automatico per VigilanzaTurni
# Uso: bash deploy/deploy.sh

APP_DIR="/var/www/vigilanza-turni"
APP_NAME="vigilanza-turni"
BACKUP_DIR="/var/backups/vigilanza-turni"

echo "🚀 Deployment VigilanzaTurni - $(date)"

# Vai alla directory applicazione
cd $APP_DIR

# Pull ultime modifiche (se eseguito manualmente)
if [ -d .git ]; then
    echo "📥 Pull ultime modifiche da GitLab..."
    git pull origin main || true
fi

# =================== BACKUP DATABASE ===================
echo "💾 Backup database pre-deployment..."
mkdir -p $BACKUP_DIR
BACKUP_FILE="$BACKUP_DIR/backup_$(date +%Y%m%d_%H%M%S).sql"

# Load env vars
if [ -f .env ]; then
    source .env
fi

# Esegui backup PostgreSQL
if command -v pg_dump &> /dev/null; then
    # Controlla che le variabili siano definite
    if [ -z "$PGDATABASE" ] || [ -z "$PGUSER" ]; then
        echo "⚠️  Variabili DB non trovate nel .env, skip backup"
    else
        PGPASSWORD=$PGPASSWORD pg_dump -h ${PGHOST:-localhost} -U $PGUSER --dbname=$PGDATABASE > $BACKUP_FILE
        echo "✅ Backup salvato: $BACKUP_FILE"
        
        # Comprimi backup
        gzip $BACKUP_FILE
        echo "✅ Backup compresso: ${BACKUP_FILE}.gz"
        
        # Pulisci backup vecchi (> 30 giorni)
        find $BACKUP_DIR -name "backup_*.sql.gz" -mtime +30 -delete
        echo "🧹 Backup vecchi eliminati (retention: 30 giorni)"
    fi
else
    echo "⚠️  pg_dump non trovato, skip backup"
fi

# =================== BUILD & DEPLOY ===================
# Installa TUTTE le dipendenze (serve per build e migrations)
echo "📥 Installazione dipendenze (include devDependencies)..."
npm ci

# Build frontend
echo "🏗️  Build frontend Vite..."
export NODE_ENV=production
npm run build

# Database migrations (serve Drizzle che è devDependency)
echo "🗄️  Verifica database schema..."
npm run db:push || true

# Rimuovi devDependencies dopo build e migrations
echo "🧹 Pulizia devDependencies (mantiene solo production)..."
npm prune --production

# =================== RESTART APPLICATION ===================
# Restart applicazione con PM2
echo "🔄 Restart applicazione..."
if pm2 show $APP_NAME > /dev/null 2>&1; then
    pm2 reload $APP_NAME --update-env
else
    pm2 start npm --name $APP_NAME -- start
    pm2 save
fi

# Health check
echo "🏥 Health check..."
sleep 5
if pm2 show $APP_NAME | grep -q "online"; then
    echo "✅ Deployment completato con successo!"
    pm2 logs $APP_NAME --lines 20 --nostream
else
    echo "❌ Errore: applicazione non online"
    pm2 logs $APP_NAME --lines 50 --nostream
    
    # Rollback: ripristina ultimo backup
    echo "🔄 Tentativo rollback backup..."
    LATEST_BACKUP=$(ls -t $BACKUP_DIR/backup_*.sql.gz 2>/dev/null | head -1)
    if [ -f "$LATEST_BACKUP" ]; then
        echo "📦 Ripristino da: $LATEST_BACKUP"
        gunzip -c $LATEST_BACKUP | PGPASSWORD=$PGPASSWORD psql -h ${PGHOST:-localhost} -U $PGUSER --dbname=$PGDATABASE
        echo "✅ Database ripristinato"
    fi
    
    exit 1
fi

# =================== STATUS ===================
echo ""
echo "📊 Status PM2:"
pm2 status

echo ""
echo "📈 Ultimi backup disponibili:"
ls -lht $BACKUP_DIR/*.gz 2>/dev/null | head -5 || echo "Nessun backup trovato"

echo ""
echo "🌐 Applicazione disponibile su: https://vt.alfacom.it"