app/main.py

import os
from fastapi import FastAPI, Request, UploadFile, HTTPException
from fastapi.responses import HTMLResponse, FileResponse
from fastapi.staticfiles import StaticFiles
from fastapi.templating import Jinja2Templates
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel

import subprocess
from pathlib import Path
from config import settings
import logging


app = FastAPI(
    title=settings.PROJECT_NAME, openapi_url=f"{settings.API_V1_STR}/openapi.json"
)

# app.mount("/static", FileResponse, name="static")
# templates = Jinja2Templates(directory="templates")

app.mount("/static", StaticFiles(directory="app/static"), name="static")
templates = Jinja2Templates(directory="app/templates")

class Item(BaseModel):
    file: UploadFile


@app.get("/", response_class=HTMLResponse)
async def root(request: Request):
    return templates.TemplateResponse("index.html", {"request": request})


@app.post("/detect/", response_class=HTMLResponse)
async def detect_objects(request: Request, file: UploadFile):
    try:
    
        print('File name:', file.filename)
        
        input_file_path = f"app/static/{file.filename}"
        output_file_path = "app/static/output"

        # Save the uploaded file
        with open(input_file_path, "wb") as input_file:
            input_file.write(await file.read())

        print('Detect start')

        # Run YOLOv7 detection and save output
        subprocess.run(["python", "app/detect.py", "--conf", "0.5", "--img-size", "640", "--weights", "app/model/best.pt", "--no-trace",  
                        "--source", str(input_file_path), "--save-txt", "--save-conf", "--exist-ok", "--project", str(output_file_path)], check=True)

        print('Detect end')

        original_image_path = f"../static/{file.filename}"
        output_image_path = f"../static/output/exp/{file.filename}"
        
        print('original_image_path :', str(original_image_path))
        print('output_image_path :', str(output_image_path))

        # Render HTML using Jinja2Templates
        return templates.TemplateResponse(
            "result.html",
            {"request": request, "output_image": str(output_image_path)}
        )


    
    except subprocess.CalledProcessError as e:
        # Handle subprocess error (e.g., log the error, return an error response)
        print(f"Subprocess error: {e}")
        raise HTTPException(status_code=500, detail="Subprocess error")



# Set all CORS enabled origins
# if settings.BACKEND_CORS_ORIGINS:
#     app.add_middleware(
#         CORSMiddleware,
#         allow_origins=[str(origin) for origin in settings.BACKEND_CORS_ORIGINS],
#         allow_credentials=True,
#         allow_methods=["*"],
#         allow_headers=["*"],
#     )


# Start app
if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host="0.0.0.0", port=8001)