import asyncio
import os
from fastapi import FastAPI
from fastapi.responses import FileResponse
from contextlib import asynccontextmanager
import subprocess

# We will run the bot as a background subprocess so it doesn't block the web server event loop
bot_process = None

@asynccontextmanager
async def lifespan(app: FastAPI):
    global bot_process
    # Setup data files
    if not os.path.exists("game_history.csv"):
        open("game_history.csv", "w").close()
    
    # Start the bot.py in background with xvfb wrapper to simulate a real monitor display
    bot_process = subprocess.Popen(["xvfb-run", "-a", "python", "run_bot.py"])
    print("[SERVER] Bot started in background with Xvfb (Virtual Display)...")
    
    yield
    
    # Teardown: Stop the bot
    if bot_process:
        bot_process.terminate()
        print("[SERVER] Bot stopped.")

app = FastAPI(lifespan=lifespan)

@app.get("/")
def read_root():
    return {"status": "Active", "message": "Aviator Data Collector is running 🚀"}

@app.get("/results")
def get_results():
    try:
        if os.path.exists("game_history.csv"):
            with open("game_history.csv", "r") as f:
                lines = f.readlines()
            # return last 50 results
            return {"results": [l.strip() for l in lines[-50:]]}
    except:
        pass
    return {"results": []}

@app.get("/download")
def download_file():
    """Allows user to directly download the CSV file"""
    if os.path.exists("game_history.csv"):
        return FileResponse(path="game_history.csv", filename="game_history.csv", media_type="text/csv")
    return {"error": "File not found or no data collected yet."}