import platform
from pathlib import PurePath, Path
from os import getenv
import json
import uuid
from zipfile import ZipFile
import datetime
import logging

# Launcher/Install profiles are found in .minecraft/launcher_profiles.json


def get_sysroot():
    if platform.system() == 'Windows':
        if getenv('APPDATA'):
            return PurePath(getenv('APPDATA'))
    if platform.system() == 'Darwin':
        return PurePath(Path.home(), 'Library', 'Application Support')
    if platform.system() == 'Linux':
        return PurePath(Path.home())
    return None


def get_minecraft_folder(sys_root):
    return sys_root / f"{'' if platform.system() == 'Darwin' else '.'}minecraft"


def get_installs(minecraft_folder):
    with open(minecraft_folder / 'launcher_profiles.json') as f:
        json_data = json.load(f)
    return json_data.get('profiles')


def get_modpack_id(modpack_name, install_list):
    for install in install_list:
        if modpack_name in install_list[install]['name']:
            return install
    return None


def main(modpack_path):
    # Get Minecraft Install Location
    sys_root = get_sysroot()
    if not sys_root:
        sys_root = input("Unable to locate your minecraft install - please enter it here: ")

    logging.debug(f"System path set to: {sys_root}")

    # Get Modpack Name from zipfile:
    modpack_name = modpack_path.stem
    logging.debug(f"Modpack name extracted as: {modpack_name}")

    # Get Minecraft Installs
    install_list = get_installs(get_minecraft_folder(sys_root))
    modpack_id = get_modpack_id(modpack_name, install_list) or uuid.uuid4().hex
    logging.debug(f"Modpack ID extracted as: {modpack_id}")

    install_path = sys_root / '.moddedminecraft' / modpack_name
    logging.debug(f"Modpack install path set to: {install_path}")

    # Check if modpack is already installed
    if modpack_id not in install_list:
        logging.info(f"Modpack {modpack_name} ({modpack_id}) not found in install list - creating...")
        install_list[modpack_id] = {
            'created': datetime.datetime.now().strftime('%Y-%m-%dT%H:%M:%S.%f')[:-3] + 'Z',
            'gameDir': install_path,
            'icon': 'Redstone_Block',
            'javaArgs': '-Xmx4G '
                        '-XX:+UnlockExperimentalVMOptions '
                        '-XX:+UseG1GC -XX:G1NewSizePercent=20 '
                        '-XX:G1ReservePercent=20 '
                        '-XX:MaxGCPauseMillis=50 '
                        '-XX:G1HeapRegionSize=32M',
            'lastUsed': '',
            'lastVersionId': '1.16.5-forge-36.0.43',
            'name': modpack_name,
            'type': 'custom'
        }
        with open(get_minecraft_folder(sys_root) / 'launcher_profiles.json', 'r') as f:
            full_profile_setup = json.load(f)
        with open(get_minecraft_folder(sys_root) / 'launcher_profiles.json', 'w') as f:
            full_profile_setup['profiles'] = install_list
            json.dump(full_profile_setup, f)
        logging.info(f"Successfully added mod to installed profile list.")

    # Validate file structure compared to mod zip
    with ZipFile(modpack_path, 'r') as zip:
        logging.info("Validating mod files...")
        Path(install_path).mkdir(parents=True, exist_ok=True)
        zip.extractall(install_path)
    logging.info("Validation Completed.")


if __name__ == '__main__':
    main(PurePath() / 'testing_data' / 'FusterCluck_test.zip')