import time
import asyncio
import base64
from typing import Optional
from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()
start_time = time.time()

class GenerateRequest(BaseModel):
    prompt: str
    height: Optional[int] = 512
    width: Optional[int] = 512
    num_inference_steps: Optional[int] = 50
    guidance_scale: Optional[float] = 7.5
    return_base64: Optional[bool] = False

@app.post("/generate")
async def generate(req: GenerateRequest):
    # شبیه‌سازی کار سنگین (می‌توانید این بخش را به نمونه واقعی جایگزین کنید)
    await asyncio.sleep(0.5)  # نصف ثانیه تا یک ثانیه
    payload = f"Generated for: {req.prompt}".encode("utf-8")
    if req.return_base64:
        return {"base64": base64.b64encode(payload).decode()}
    return {
        "prompt": req.prompt,
        "height": req.height,
        "width": req.width,
        "num_inference_steps": req.num_inference_steps,
        "guidance_scale": req.guidance_scale,
        "output": payload.decode("utf-8", errors="ignore")
    }

@app.get("/status")
async def status():
    uptime = int(time.time() - start_time)
    return {
        "ready": True,
        "uptime_seconds": uptime,
        "docs": "/docs",
        "openapi": "/openapi.json"
    }

if __name__ == "__main__":
    import uvicorn
    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)