from typing import Literal, Optional

from pydantic import BaseModel, Field, model_validator


class MessageFeedbackRequestDTO(BaseModel):
    """消息反馈请求模型"""

    message_id: str = Field(..., description="消息 ID")
    feedback: Literal["like", "dislike"] = Field(..., description="反馈类型: like/dislike")
    feedback_content: Optional[str] = Field(default=None, description="点踩反馈内容")

    @model_validator(mode="after")
    def validate_feedback_content(self):
        if self.feedback == "dislike" and not (self.feedback_content or "").strip():
            raise ValueError("feedback_content is required when feedback=dislike")
        return self