import http.server
import socketserver
import urllib.parse

import urllib.request

PORT=18001


DATA_SRV_PATH =  "/devicedataservice/dataservice"
#?data=25e4e40901a2c100000000000000000000413a41040000000000000000001d9222e6
 

RESPONSES = {
    0x24:"A00000000000000001000000000000000000000000000000bec650a1",
    0x22:"A20000000000000000000000000000000000000000000000c9950d3f",
    0x25:"A00000000000000001000000000000000000000000000000bec650a1",
    0x28:"A5000000000000000100000000000000000000000000000056e5abd9",
    0x21:"A10000000000000009c4914c0000000000000000000000001d095ec4",
    0x29:""
}


class Handler(http.server.SimpleHTTPRequestHandler):
    
    def do_GET(self):
        parts = urllib.parse.urlsplit(self.path)

        if parts.path == DATA_SRV_PATH:
            self.do_dataservice(parts)
    
    def do_dataservice(self, urlparts):
        params = urllib.parse.parse_qs(urlparts.query)
        if 'data' not in params:
            print ('got message without data: ' + urlparts.query)
            self.send_error(400,'invalid message')

        data_str = params['data'][0]

        bin_data = bytes.fromhex(data_str)
        msg_type = bin_data[0]

        if msg_type not in RESPONSES:
            print ('got unknown message: ' + data_str)
            self.send_error(400,'unknown message')

        response = RESPONSES[msg_type]

        self.send_response(http.server.HTTPStatus.OK)
        self.send_header("Content-type", "text/html")
        self.send_header("Content-Length", len(response))
        self.end_headers()
        self.wfile.write(response.encode('utf-8'))

with socketserver.TCPServer(("",PORT), Handler) as httpd:
    print('started at port %d'%PORT)
    httpd.serve_forever()