import json
from pydantic import BaseModel, field_validator
from typing import Optional, Dict, Any, Literal, List
from datetime import datetime


class VasProductRoutingBase(BaseModel):
    is_active: Optional[int] = None
    config: Optional[Dict[str, Any]] = None
    @field_validator("config", mode="before")
    def normalize_json_field(cls, v):
        if v is None:
            return None
        if isinstance(v, str):
            try:
                return json.loads(v)
            except Exception:
                return {}
        return v

class VasProductRoutingCreate(BaseModel):
    product_id: int
    routing_key: str
    script_version: str
    config: Dict[str, Any]

class VasProductRoutingUpdate(VasProductRoutingBase):
    pass

class VasProductRoutingOut(VasProductRoutingBase):
    id: int
    product_id: int

    routing_key: str
    script_version: str

    created_at: datetime
    updated_at: datetime

    model_config = {
        "from_attributes": True
    }