"""Avatar generation service using DiceBear API."""

from typing import Optional
import httpx
from rehearsalhub.db.models import Member


class AvatarService:
    """Service for generating and managing user avatars."""

    def __init__(self):
        self.base_url = "https://api.dicebear.com/9.x"

    async def generate_avatar_url(self, seed: str, style: str = "identicon") -> str:
        """Generate a DiceBear avatar URL for the given seed.
        
        Args:
            seed: Unique identifier (user ID, email, etc.)
            style: Avatar style (default: identicon)
            
        Returns:
            URL to the generated avatar
        """
        # Clean the seed for URL usage
        clean_seed = seed.replace("-", "").replace("_", "")
        
        # Construct DiceBear URL
        return f"{self.base_url}/{style}/svg?seed={clean_seed}&backgroundType=gradientLinear&size=128"

    async def generate_default_avatar(self, member: Member) -> str:
        """Generate a default avatar for a member using their ID as seed.
        
        Args:
            member: Member object
            
        Returns:
            URL to the generated avatar
        """
        return await self.generate_avatar_url(str(member.id))

    async def get_avatar_url(self, member: Member) -> Optional[str]:
        """Get the avatar URL for a member, generating default if none exists.
        
        Args:
            member: Member object
            
        Returns:
            Avatar URL or None
        """
        if member.avatar_url:
            return member.avatar_url
        
        # Generate default avatar if none exists
        return await self.generate_default_avatar(member)