#!/usr/bin/env python3
from urllib.request import Request, urlopen
from base64 import b64decode
from os import makedirs
import json

def jsonurlread(url, data=None):
    return json.loads(urlopen(Request(url,
        data=json.dumps(data).encode() if data is not None else None,
        headers={"Content-Type": "application/json"})).read().decode())

def dlskin(user):
    data = jsonurlread("https://api.mojang.com/profiles/minecraft", [user])
    uuid = data[0]["id"]

    data = jsonurlread("https://sessionserver.mojang.com/session/minecraft/profile/%s" % uuid)
    textures = None
    for x in data["properties"]:
        if x["name"] == "textures":
            textures = json.loads(b64decode(x["value"].encode()))["textures"]

    if "SKIN" in textures:
        skin = urlopen(textures["SKIN"]["url"]).read()
        makedirs("skin", exist_ok=True)
        open("skin/%s.png" % user, "wb").write(skin)
    if "CAPE" in textures:
        skin = urlopen(textures["CAPE"]["url"]).read()
        makedirs("cape", exist_ok=True)
        open("cape/%s.png" % user, "wb").write(cape)

if __name__ == "__main__":
    from sys import argv
    dlskin(argv[1])