from typing import List, Optional, Any
from pydantic import BaseModel, Field

class Message(BaseModel):
    role: str = Field(..., description="Role of the message sender (user/assistant/system)")
    content: str = Field(..., description="Content of the message")

class ChatRequest(BaseModel):
    messages: List[Message] = Field(..., description="List of messages in the conversation")
    temperature: Optional[float] = Field(0.6, ge=0.0, le=2.0, description="Sampling temperature")
    max_tokens: Optional[int] = Field(512, ge=1, le=4096, description="Maximum tokens to generate")
    stream: Optional[bool] = Field(False, description="Enable streaming response")
    returnJson: Optional[bool] = Field(False, description="Extract and return JSON from response")

class VisionRequest(BaseModel):
    prompt: str = Field(..., description="Text prompt/question about the image")
    temperature: Optional[float] = Field(0.6, ge=0.0, le=2.0, description="Sampling temperature")
    max_tokens: Optional[int] = Field(512, ge=1, le=4096, description="Maximum tokens to generate")
    return_json: Optional[bool] = Field(False, description="Extract and return JSON from response")

class ErrorResponse(BaseModel):
    error: str
    detail: Optional[str] = None

class HealthResponse(BaseModel):
    status: str
    text_model: bool
    vision_model: bool
    timestamp: str