#!/usr/bin/env python3
import string
from http.server import HTTPServer, BaseHTTPRequestHandler
from io import BytesIO
import base64


NULL_CHAR = chr(0)

def write_report(report):
    with open('/dev/hidg0', 'rb+') as fd:
        fd.write(report.encode())

def release_keys():
    write_report(NULL_CHAR*8)

def printchar(c):
    if c.islower():
        write_report(NULL_CHAR*2+chr(4 + ord(c) - ord('a'))+NULL_CHAR*5)
    elif c.isupper():
        write_report(chr(32)+NULL_CHAR+chr(4 + ord(c) - ord('A'))+NULL_CHAR*5)
    elif c.isdigit():
        write_report(NULL_CHAR*2+chr(0x1e + ((ord(c) - ord('0') - 1) % 10))+NULL_CHAR*5)
    elif c == ' ':
        write_report(NULL_CHAR*2+chr(44)+NULL_CHAR*5)
    elif c == '\n':
        write_report(NULL_CHAR*2+chr(40)+NULL_CHAR*5)
    else:
        write_report(chr(32)+NULL_CHAR+chr(0x38)+NULL_CHAR*5)
    release_keys()


def change_color(background, foreground):
    # DELETE keypress
    write_report(NULL_CHAR*2+chr(0x2a)+NULL_CHAR*5)

def printstring(s):
    for c in s:
        printchar(c)


class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):

    def do_GET(self):
        self.send_response(200)
        self.end_headers()
        self.wfile.write(b'Hello, world!')

    def do_POST(self):
        print(self.headers)
        message = base64.b64decode(self.headers['X-Messages']).decode('ascii')
        self.send_response(200)
        self.end_headers()
        response = BytesIO()
        response.write(b'This is POST request. ')
        response.write(b'Received: ')
        self.wfile.write(response.getvalue())
        if message == 'reset':
            printstring('\n' * 32)
        else:
            printstring(message + '\n')


httpd = HTTPServer(('0.0.0.0', 8000), SimpleHTTPRequestHandler)
httpd.serve_forever()