import os
import pty
import select
import shlex
import subprocess
import threading

from flask import Flask, render_template, request, jsonify, send_from_directory
from flask_socketio import SocketIO, emit
import eventlet
eventlet.monkey_patch()

app = Flask(__name__)
socketio = SocketIO(app, cors_allowed_origins="*")

UPLOAD_DIR = "/tmp/vpskw/uploads"
os.makedirs(UPLOAD_DIR, exist_ok=True)

# Buka PTY untuk shell
master_fd, slave_fd = pty.openpty()
subprocess.Popen(["/bin/bash"], preexec_fn=os.setsid, stdin=slave_fd, stdout=slave_fd, stderr=slave_fd)

# Baca output dari shell dan kirim ke client
@socketio.on('connect')
def connect():
    def read_output():
        while True:
            r, _, _ = select.select([master_fd], [], [])
            if master_fd in r:
                output = os.read(master_fd, 1024).decode(errors="ignore")
                socketio.emit('output', output)
    threading.Thread(target=read_output, daemon=True).start()

# Terima input dari terminal web
@socketio.on('input')
def handle_input(data):
    os.write(master_fd, data.encode())

# Endpoint upload file
@app.route('/upload', methods=['POST'])
def upload():
    f = request.files['file']
    path = os.path.join(UPLOAD_DIR, f.filename)
    f.save(path)
    return jsonify({"status": "uploaded", "path": path})

# Serve halaman utama
@app.route('/')
def index():
    return render_template('index.html')

# Serve xterm.js kalau gak dari CDN
@app.route('/xterm.js')
def xterm_js():
    return send_from_directory('static', 'xterm.js')

# Start
if __name__ == "__main__":
    socketio.run(app, host="0.0.0.0", port=7860)