import os
import sys
import hashlib
import json
from pprint import pprint
from configparser import ConfigParser


def calculate_md5(file_path):
    hash_md5 = hashlib.md5()
    with open(file_path, "rb") as f:
        for chunk in iter(lambda: f.read(4096), b""):
            hash_md5.update(chunk)
    return hash_md5.hexdigest()


def read_config(config_path):
    config = ConfigParser()
    config.read(config_path)
    return config


def temp_forge_json():
    with open('temp_forge.json') as json_file:
        data = json.load(json_file)
    return data


def parse_servers_config(config: ConfigParser):
    servers = []
    for section in config.sections():
        if section.split(' ')[0] == 'Server' or section.split(' ')[0] == 'server':
            new_server = {'id': (config.get(section, 'id')),
                          'name': (config.get(section, 'name')),
                          'description': (config.get(section, 'description')),
                          'icon': (config.get(section, 'icon')),
                          'version': (config.get(section, 'version')),
                          'address': (config.get(section, 'address')),
                          'minecraftVersion': (config.get(section, 'minecraftVersion')),
                          'discord_shortId': (config.get(section, 'discord_shortId')),
                          'discord_largeImageText': (config.get(section, 'discord_largeImageText')),
                          'discord_largeImageKey': (config.get(section, 'discord_largeImageKey')),
                          'mainServer': (config.get(section, 'mainServer')),
                          'autoconnect': (config.get(section, 'autoconnect')),
                          '_path': (config.get(section, 'path')),
                          '_download_url': (config.get(section, 'download_url')),
                          'modules': generate_mod_list(config.get(section, 'path'),
                                                       config.get(section, 'download_url'))}
            servers.append(new_server)
    return servers


def scan_mods(path):
    f = []
    for (dirpath, dirnames, filenames) in os.walk(path):
        f.extend(filenames)
        break
    return f


def generate_mod_list(server_path, download_url):
    mods_file_list = scan_mods(os.path.join(server_path, 'mods'))

    mod_list = []
    mod_list.append(temp_forge_json())
    for mod in mods_file_list:
        path_to_mod = os.path.join(server_path, 'mods', mod)
        mod = mod[:-4]
        parsed_mod = mod.split('_')
        mod_id = parsed_mod[0]
        parsed_mod[0] = parsed_mod[0].split(':')
        parsed_mod[1] = parsed_mod[1].replace('-', ' ')

        is_mod_required = True
        if parsed_mod[-1] is not None:
            if parsed_mod[-1] == 'ServerSide':
                continue
            if parsed_mod[-1] == 'Optional':
                is_mod_required = False
        new_mod = {
            'id': mod_id,
            'name': parsed_mod[1],
            'type': 'ForgeMod',
            'required': is_mod_required,
            'artifact': {'size': sys.getsizeof(path_to_mod),
                         'MD5': calculate_md5(path_to_mod),
                         'url': download_url + mod + '.jar'
                         }
        }
        mod_list.append(new_mod)
    return mod_list


def generate_json(config: ConfigParser):
    new_distribution = {
        'version': (config.get('Basic', 'version')),
        'discord': {
            'clientId': (config.get('Basic', 'version')),
            'smallImageText': (config.get('Basic', 'discord_smallImageText')),
            'smallImageKey': (config.get('Basic', 'dicord_smallImageKey'))
        },
        'java': {
            'oracle': (config.get('Basic', 'java'))
        },
        'rss': (config.get('Basic', 'rss')),
        'servers': parse_servers_config(config)
    }
    return new_distribution


if __name__ == '__main__':
    temp_forge_json()
    config = read_config(sys.argv[1])
    # servers_list = parse_servers_config(config)
    # mod_list = generate_mod_list(servers_list)
    distribution = generate_json(config)

    pprint(distribution)

    with open('distribution.json', 'w', encoding='utf-8') as f:
        json.dump(distribution, f, ensure_ascii=False, indent=4)