#!/usr/bin/env python3

from http.server import BaseHTTPRequestHandler, HTTPServer
import json

class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):
    def do_POST(self):
        if self.path == '/submit':
            content_length = int(self.headers['Content-Length'])
            post_data = self.rfile.read(content_length)
            data = json.loads(post_data)
            response = data.get('type', 'No type provided')
            
            self.send_response(200)
            self.send_header('Content-type', 'application/json')
            self.end_headers()
            self.wfile.write(json.dumps({'type': response}).encode('utf-8'))
        else:
            self.send_response(404)
            self.end_headers()

    def do_GET(self):
        if self.path == '/':
            self.send_response(200)
            self.send_header('Content-type', 'text/html')
            self.end_headers()
            self.wfile.write(b'Hello, world!')
        else:
            self.send_response(404)
            self.end_headers()

def run(server_class=HTTPServer, handler_class=SimpleHTTPRequestHandler, port=8000):
    server_address = ('', port)
    httpd = server_class(server_address, handler_class)
    print(f'Starting httpd server on port {port}')
    httpd.serve_forever()

if __name__ == "__main__":
    run()