from fastapi import FastAPI, Form, Request, BackgroundTasks
from fastapi.responses import HTMLResponse
from fastapi.templating import Jinja2Templates
#from pydantic import BaseModel

from uuid import uuid4
import asyncio

from build_map import load_dataset_and_metadata, upload_dataset_to_atlas


app = FastAPI()
# TODO: use task management queue
tasks = {}
templates = Jinja2Templates(directory="templates")

def upload_atlas_task(task_id, dataset_name):
    dataset_dict = load_dataset_and_metadata(dataset_name)
    map_url = upload_dataset_to_atlas(dataset_dict, project_name="atlas-space-test")
    tasks[task_id]['status'] = 'done'
    tasks[task_id]['url'] = map_url

@app.on_event("startup")
async def startup_event():
    asyncio.create_task(cleanup_tasks())

async def cleanup_tasks():
    while True:
        current_time = time.time()
        tasks_to_delete = []
        for task_id, task in tasks.items():
            if task['status'] == 'done' and current_time - task.get('finish_time', current_time) > 1800:  # 30 minutes
                tasks_to_delete.append(task_id)
        for task_id in tasks_to_delete:
            del tasks[task_id]
        await asyncio.sleep(1800)  # Wait for 30 minutes

@app.get("/", response_class=HTMLResponse)
async def read_form(request: Request):
    # Render the form.html template
    return templates.TemplateResponse("form.html", {"request": request})

@app.post("/submit_form")
async def form_post(background_tasks: BackgroundTasks, dataset_name: str = Form(...)):
    task_id = str(uuid4())
    tasks[task_id] = {'status': 'running'}
    #form_data = DatasetForm(dataset_name=dataset_name)
    background_tasks.add_task(upload_atlas_task, task_id, dataset_name)
    
    return {'task_id': task_id}

@app.get("/status/{task_id}")
async def read_task(task_id: str):
    if task_id not in tasks:
        return {'status': 'not found'}
    else:
        return tasks[task_id]