from typing import Optional

from pydantic import BaseModel, Field, field_validator


class LlmConfig(BaseModel):
    provider: str = Field(
        description="Provider of the LLM (e.g., 'ollama', 'openai')", default="openai"
    )
    config: Optional[dict] = Field(
        description="Configuration for the specific LLM", default={}
    )

    @field_validator("config")
    def validate_config(cls, v, values):
        provider = values.data.get("provider")
        if provider in ("openai", "ollama", "groq", "together", "aws_bedrock", "litellm"):
            return v
        else:
            raise ValueError(f"Unsupported LLM provider: {provider}")