#!/bin/bash
# backup_db.sh - Script for backing up the PostgreSQL database

echo "📦 Backing up PostgreSQL database..."

# Default backup directory
BACKUP_DIR="${BACKUP_DIR:-/var/backups/tg_tinder_bot}"
BACKUP_FILENAME="tg_tinder_bot_$(date +%Y%m%d_%H%M%S).sql"
BACKUP_PATH="$BACKUP_DIR/$BACKUP_FILENAME"

# Create backup directory if it doesn't exist
mkdir -p "$BACKUP_DIR"

# Check if running in docker-compose environment
if [ -f /.dockerenv ] || [ -f /proc/self/cgroup ] && grep -q docker /proc/self/cgroup; then
    echo "🐳 Running in Docker environment, using docker-compose exec..."
    docker-compose exec -T db pg_dump -U postgres telegram_tinder_bot > "$BACKUP_PATH"
else
    # Check if PGPASSWORD is set in environment
    if [ -z "$PGPASSWORD" ]; then
        # If .env file exists, try to get password from there
        if [ -f .env ]; then
            DB_PASSWORD=$(grep DB_PASSWORD .env | cut -d '=' -f2)
            export PGPASSWORD="$DB_PASSWORD"
        else
            echo "⚠️ No DB_PASSWORD found in environment or .env file."
            echo "Please enter PostgreSQL password:"
            read -s PGPASSWORD
            export PGPASSWORD
        fi
    fi
    
    echo "💾 Backing up database to $BACKUP_PATH..."
    pg_dump -h localhost -U postgres -d telegram_tinder_bot > "$BACKUP_PATH"
fi

# Check if backup was successful
if [ $? -eq 0 ]; then
    echo "✅ Backup completed successfully: $BACKUP_PATH"
    echo "📊 Backup size: $(du -h $BACKUP_PATH | cut -f1)"
    
    # Compress the backup
    gzip -f "$BACKUP_PATH"
    echo "🗜️ Compressed backup: $BACKUP_PATH.gz"
    
    # Keep only the last 7 backups
    echo "🧹 Cleaning up old backups..."
    find "$BACKUP_DIR" -name "tg_tinder_bot_*.sql.gz" -type f -mtime +7 -delete
    
    echo "🎉 Backup process completed!"
else
    echo "❌ Backup failed!"
    exit 1
fi