import os
import uuid
from datetime import datetime

from app.core.config import settings


def generate_unique_filename(original_filename: str) -> str:
    """Generate a unique filename preserving the original extension."""
    name, ext = os.path.splitext(original_filename)
    unique_id = uuid.uuid4().hex
    return f"{unique_id}{ext}"


def get_relative_storage_path(folder: str, filename: str) -> str:
    """
    Generate a relative storage path using date-based organization.

    Example: "event-themes/2023/03/filename.jpg"
    """
    today = datetime.now()
    year_month = today.strftime("%Y/%m")
    return os.path.join(folder, year_month, filename)


def validate_image_content_type(content_type: str) -> bool:
    """Check if the content type is an allowed image type."""
    return content_type in settings.ALLOWED_IMAGE_TYPES