#!/bin/bash
# ScriptShare Database Backup Script

set -e

# Load environment variables
if [ -f ".env" ]; then
    source .env
fi

# Default values
DB_CONTAINER=${DB_CONTAINER:-scriptshare-db}
BACKUP_DIR=${BACKUP_DIR:-./backups}
RETENTION_DAYS=${BACKUP_RETENTION_DAYS:-30}

# Create backup directory
mkdir -p "$BACKUP_DIR"

# Generate backup filename with timestamp
TIMESTAMP=$(date +"%Y%m%d_%H%M%S")
BACKUP_FILE="$BACKUP_DIR/scriptshare_backup_$TIMESTAMP.sql"

echo "🗄️ Starting database backup..."
echo "Backup file: $BACKUP_FILE"

# Create database backup
docker exec "$DB_CONTAINER" mysqldump \
    --single-transaction \
    --routines \
    --triggers \
    --all-databases \
    -u root \
    -p"${DB_ROOT_PASSWORD}" > "$BACKUP_FILE"

# Compress the backup
gzip "$BACKUP_FILE"
BACKUP_FILE="$BACKUP_FILE.gz"

echo "✅ Database backup completed: $BACKUP_FILE"

# Calculate backup size
BACKUP_SIZE=$(du -h "$BACKUP_FILE" | cut -f1)
echo "📦 Backup size: $BACKUP_SIZE"

# Clean up old backups
echo "🧹 Cleaning up old backups (older than $RETENTION_DAYS days)..."
find "$BACKUP_DIR" -name "scriptshare_backup_*.sql.gz" -mtime +$RETENTION_DAYS -delete

# List remaining backups
echo "📋 Current backups:"
ls -lh "$BACKUP_DIR"/scriptshare_backup_*.sql.gz 2>/dev/null || echo "No backups found"

echo "✅ Backup process completed successfully!"