"""
Script to prepare and package the B2B Ecommerce NER model for Hugging Face upload
"""

import os
import shutil
import json
from pathlib import Path
import sys

# Add parent directory to path to import our modules
sys.path.append(str(Path(__file__).parent.parent))


def prepare_huggingface_model():
    """Prepare the model for Hugging Face upload"""
    
    print("Preparing B2B Ecommerce NER model for Hugging Face...")
    
    # Paths
    base_dir = Path(__file__).parent.parent
    hf_dir = Path(__file__).parent
    spacy_model_path = base_dir / "models" / "food_ner_model"
    catalog_path = base_dir / "data" / "product_catalog.csv"
    
    print(f"Base directory: {base_dir}")
    print(f"HuggingFace directory: {hf_dir}")
    print(f"spaCy model path: {spacy_model_path}")
    print(f"Catalog path: {catalog_path}")
    
    # Check if required files exist
    if not spacy_model_path.exists():
        print(f"❌ spaCy model not found at {spacy_model_path}")
        print("Please train the model first using: python src/train_model.py")
        return False
    
    if not catalog_path.exists():
        print(f"❌ Product catalog not found at {catalog_path}")
        print("Please ensure product_catalog.csv exists in the data directory")
        return False
    
    print("✅ Required files found")
    
    # Copy spaCy model
    target_spacy_path = hf_dir / "spacy_model"
    if target_spacy_path.exists():
        shutil.rmtree(target_spacy_path)
    
    print(f"Copying spaCy model to {target_spacy_path}")
    shutil.copytree(spacy_model_path, target_spacy_path)
    
    # Copy product catalog
    target_catalog_path = hf_dir / "product_catalog.csv"
    print(f"Copying product catalog to {target_catalog_path}")
    shutil.copy(catalog_path, target_catalog_path)
    
    # Update model configuration with actual paths
    config_path = hf_dir / "config.json"
    with open(config_path, 'r') as f:
        config = json.load(f)
    
    config["spacy_model_path"] = "spacy_model"
    config["catalog_path"] = "product_catalog.csv"
    config["prepared_for_upload"] = True
    
    with open(config_path, 'w') as f:
        json.dump(config, f, indent=2)
    
    print("✅ Model prepared successfully!")
    print("\nNext steps:")
    print("1. Test the model using: python huggingface_model/example.py")
    print("2. Upload to Hugging Face using the upload script")
    
    return True


def test_prepared_model():
    """Test the prepared model"""
    print("\nTesting prepared model...")
    
    try:
        from model import B2BEcommerceNER
        
        # Initialize model with local paths
        model = B2BEcommerceNER(
            model_path="spacy_model",
            catalog_path="product_catalog.csv"
        )
        
        # Test prediction
        test_texts = ["Order 5 Coke Zero 650ML"]
        results = model.predict(test_texts)
        
        print("✅ Model test successful!")
        print("Sample result:", json.dumps(results[0], indent=2, default=str))
        
        return True
        
    except Exception as e:
        print(f"❌ Model test failed: {e}")
        return False


def create_upload_script():
    """Create a script for uploading to Hugging Face"""
    
    upload_script = '''#!/usr/bin/env python3
"""
Upload the B2B Ecommerce NER model to Hugging Face Hub
"""

from huggingface_hub import HfApi, create_repo
import os
from pathlib import Path


def upload_to_huggingface(repo_name: str, token: str = None):
    """
    Upload the model to Hugging Face Hub
    
    Args:
        repo_name: Name of the repository (e.g., "username/b2b-ecommerce-ner")
        token: Hugging Face token (or set HF_TOKEN environment variable)
    """
    
    if token is None:
        token = os.getenv("HF_TOKEN")
        if not token:
            print("Please provide a Hugging Face token or set HF_TOKEN environment variable")
            return False
    
    api = HfApi()
    
    try:
        # Create repository
        print(f"Creating repository: {repo_name}")
        create_repo(repo_name, token=token, exist_ok=True)
        
        # Upload all files in the current directory
        model_dir = Path(__file__).parent
        
        print("Uploading files...")
        api.upload_folder(
            folder_path=model_dir,
            repo_id=repo_name,
            token=token,
            repo_type="model"
        )
        
        print(f"✅ Model uploaded successfully to: https://huggingface.co/{repo_name}")
        return True
        
    except Exception as e:
        print(f"❌ Upload failed: {e}")
        return False


if __name__ == "__main__":
    import sys
    
    if len(sys.argv) != 2:
        print("Usage: python upload.py <repo_name>")
        print("Example: python upload.py username/b2b-ecommerce-ner")
        sys.exit(1)
    
    repo_name = sys.argv[1]
    success = upload_to_huggingface(repo_name)
    
    if success:
        print("\\nYour model is now available on Hugging Face!")
        print(f"You can use it with: B2BEcommerceNER.from_pretrained('{repo_name}')")
    else:
        print("\\nUpload failed. Please check your token and try again.")
'''
    
    upload_script_path = Path(__file__).parent / "upload.py"
    with open(upload_script_path, 'w') as f:
        f.write(upload_script)
    
    # Make it executable
    os.chmod(upload_script_path, 0o755)
    
    print(f"✅ Upload script created at {upload_script_path}")


def main():
    """Main function to prepare the model"""
    
    print("B2B Ecommerce NER - Hugging Face Preparation")
    print("=" * 50)
    
    # Change to the HuggingFace directory
    os.chdir(Path(__file__).parent)
    
    # Prepare the model
    if not prepare_huggingface_model():
        return False
    
    # Test the model
    if not test_prepared_model():
        return False
    
    # Create upload script
    create_upload_script()
    
    print("\n🎉 Model preparation complete!")
    print("\nFiles in huggingface_model directory:")
    for file_path in Path(".").iterdir():
        if file_path.is_file():
            print(f"  📄 {file_path.name}")
        elif file_path.is_dir():
            print(f"  📁 {file_path.name}/")
    
    print("\n📚 Usage instructions:")
    print("1. Test locally: python example.py")
    print("2. Upload to HF: python upload.py username/model-name")
    print("3. Use remotely: B2BEcommerceNER.from_pretrained('username/model-name')")
    
    return True


if __name__ == "__main__":
    main()