from fastapi import APIRouter, Depends
from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer

from backend.app.services.link_service import list_public_links, list_public_users
from backend.app.services.token_service import validate_token

router = APIRouter()
optional_bearer = HTTPBearer(auto_error=False)


@router.get('/users')
def public_users():
    return list_public_users()


@router.get('/feed')
@router.get('/feed/{username}')
def public_feed(
    username: str | None = None,
    credentials: HTTPAuthorizationCredentials | None = Depends(optional_bearer),
):
    current_user_id = None
    if credentials:
        token_data = validate_token(credentials.credentials)
        if token_data:
            current_user_id = token_data['user_id']
    items = list_public_links(username)
    return [
        {
            'id': item['id'],
            'title': item['title'],
            'url': item['url'],
            'comment': item['comment'],
            'user': {
                'username': item['username'],
                'avatar_url': item['avatar_url'],
                'bio': item['bio'],
            },
            'is_owner': item['user_id'] == current_user_id,
            'can_edit': item['user_id'] == current_user_id,
            'created_at': item['created_at'],
        }
        for item in items
    ]