"""
AI Label Stamper — FastAPI static server
이미지 처리는 전부 브라우저(Canvas)에서 수행되므로 서버는 index.html 만 서빙합니다.
"""
from pathlib import Path

from fastapi import FastAPI
from fastapi.responses import FileResponse, JSONResponse

BASE_DIR = Path(__file__).parent
INDEX_FILE = BASE_DIR / "index.html"

app = FastAPI(
    title="AI Label Stamper",
    description="Client-side image AI-label stamper",
    version="1.0.0",
    docs_url=None,
    redoc_url=None,
)


@app.get("/", response_class=FileResponse)
async def root():
    """Serve the SPA entry point."""
    return FileResponse(INDEX_FILE, media_type="text/html; charset=utf-8")


@app.get("/healthz")
async def healthz():
    """Health check endpoint used by Spaces to verify the container is alive."""
    return JSONResponse({"ok": True})


# Favicon이 없어서 404 로그가 계속 뜨는 것 방지
@app.get("/favicon.ico")
async def favicon():
    return JSONResponse({}, status_code=204)