#!/usr/bin/env python3
"""
Upload verification and safe deletion script
Verifies successful uploads before deleting local copies
"""

import os
import logging
from huggingface_hub import HfApi

# Configure logging
logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
logger = logging.getLogger(__name__)

def verify_uploads():
    """Verify which files were successfully uploaded to HF Hub"""
    
    token = os.getenv('HF_TOKEN')
    if not token:
        raise ValueError("HF_TOKEN environment variable not set")
    
    api = HfApi(token=token)
    repo_id = "LevelUp2x/dto-models"
    
    # Get list of files in repository
    try:
        repo_info = api.repo_info(repo_id)
        uploaded_files = [file.rfilename for file in repo_info.siblings]
        logger.info(f"Found {len(uploaded_files)} files in {repo_id}")
        
        # List all local model files that should have been uploaded
        local_files = []
        experiments_path = "/data/experiments"
        
        if os.path.exists(experiments_path):
            for root, _, files in os.walk(experiments_path):
                for file in files:
                    if file.endswith(('.safetensors', '.pt', '.bin')):
                        file_path = os.path.join(root, file)
                        try:
                            file_size = os.path.getsize(file_path)
                            # Skip files larger than 10GB
                            if file_size > 10 * 1024**3:
                                continue
                            local_files.append(file_path)
                        except OSError:
                            continue
        
        logger.info(f"Found {len(local_files)} local files eligible for upload")
        
        # Check which local files exist in the repository
        successfully_uploaded = []
        not_uploaded = []
        
        for local_file in local_files:
            # Convert local path to repository path format
            repo_path = local_file.replace('/data/experiments/', '')
            
            if repo_path in uploaded_files:
                successfully_uploaded.append(local_file)
            else:
                not_uploaded.append(local_file)
        
        logger.info(f"✅ {len(successfully_uploaded)} files successfully uploaded")
        logger.info(f"❌ {len(not_uploaded)} files not found in repository")
        
        return successfully_uploaded, not_uploaded
        
    except Exception as e:
        logger.error(f"Failed to verify uploads: {e}")
        return [], []

def safe_delete_files(files_to_delete):
    """Safely delete files after verification"""
    if not files_to_delete:
        logger.info("No files to delete")
        return
    
    logger.warning(f"⚠️  About to delete {len(files_to_delete)} files")
    
    deleted_count = 0
    failed_count = 0
    
    for file_path in files_to_delete:
        try:
            file_size = os.path.getsize(file_path) / (1024**3)  # Size in GB
            os.remove(file_path)
            logger.info(f"🗑️  Deleted {file_path} ({file_size:.1f}GB)")
            deleted_count += 1
        except Exception as e:
            logger.error(f"Failed to delete {file_path}: {e}")
            failed_count += 1
    
    logger.info(f"Deletion summary: {deleted_count} deleted, {failed_count} failed")
    
    # Calculate space reclaimed
    if deleted_count > 0:
        # This would require tracking individual file sizes, but we can estimate
        logger.info("Space reclamation completed successfully")

if __name__ == "__main__":
    # Load environment variables
    env_file = "/data/adaptai/platform/dataops/dto/.env"
    if os.path.exists(env_file):
        with open(env_file) as f:
            for line in f:
                if line.strip() and not line.startswith('#'):
                    key, value = line.strip().split('=', 1)
                    os.environ[key] = value
    
    logger.info("🔍 VERIFYING UPLOADS AND PREPARING FOR SAFE DELETION")
    
    successfully_uploaded, not_uploaded = verify_uploads()
    
    if successfully_uploaded:
        logger.info("\n📋 Files ready for safe deletion:")
        for file in successfully_uploaded[:5]:  # Show first 5 as sample
            logger.info(f"  - {file}")
        if len(successfully_uploaded) > 5:
            logger.info(f"  - ... and {len(successfully_uploaded) - 5} more")
        
        # Uncomment the next line to actually delete files after verification
        safe_delete_files(successfully_uploaded)
        # logger.warning("⚠️  Safe deletion is commented out for safety. Uncomment to enable.")
    
    if not_uploaded:
        logger.warning("\n⚠️  Files not uploaded (will not be deleted):")
        for file in not_uploaded[:5]:
            logger.warning(f"  - {file}")
        if len(not_uploaded) > 5:
            logger.warning(f"  - ... and {len(not_uploaded) - 5} more")