import os
from sys import platform
import shutil
import zipfile
import json


def __get_mc_dir():
    directory = ""
    if platform == 'linux':
        home = os.getenv("HOME", "")
        directory = home + "/.minecraft"
    elif platform == 'win32':
        appdata = os.getenv('APPDATA')
        directory = appdata + r"\.minecraft"
    elif platform == "darwin":
        directory = "~/Library/Application Support/minecraft"  # unsure
    directory = os.getenv("MC_DIR", directory)
    return directory


def __get_cache_dir():
    directory = ""
    if platform == 'win32':
        appdata_local = os.getenv("LOCALAPPDATA")
        directory = appdata_local + r"\mc-get"
    elif platform == 'darwin':
        directory = '~/Library/Caches/mc-get'  # unsure
    elif platform == 'linux':
        cache = os.getenv("HOME") + "/.cache"
        directory = cache + "/mc-get"
    else:
        cache = os.getenv("XDG_CACHE_HOME", "")
        directory = cache + "/mc-get"
    return directory


def get_modpack_info(filename: str):
    with zipfile.ZipFile(os.path.join(cache_dir, filename)) as modpack:
        with modpack.open("modrinth.index.json") as index:
            return type("modpack_index", (object,), json.load(index))


def install_modpacks_override(filename: str):
    with zipfile.ZipFile(os.path.join(cache_dir, filename)) as modpack:
        files = filter(lambda x: x.filename.startswith("overrides/"), modpack.infolist())
        for file in files:
            if file.is_dir():
                continue
            _to_path = os.path.join(mc_dir, file.filename[len("overrides/"):])
            os.makedirs(os.path.dirname(_to_path), exist_ok=True)
            print(file.filename[len("overrides/"):])
            with modpack.open(file) as _from, open(_to_path, 'wb') as _to:
                shutil.copyfileobj(_from, _to)


def is_path_exist(path: str):
    return os.path.exists(os.path.join(path))


def is_standard_dir_structure():
    return not os.path.exists(os.path.join(mc_dir, "home"))


def install(filename, subdir: str):
    _from = os.path.join(cache_dir, filename)
    _to = os.path.join(mc_dir, subdir, filename)
    os.makedirs(os.path.dirname(_to), exist_ok=True)
    shutil.copy2(_from, _to)


mc_dir = __get_mc_dir()
cache_dir = __get_cache_dir()