import json

import requests, os


folder = 'forge'

if not os.path.exists(folder):
    os.mkdir(folder)

# 获取 Forge 版本
forge_versions = requests.get('https://files.minecraftforge.net/maven/net/minecraftforge/forge/promotions_slim.json')\
    .json()['promos']

new_versions = {}


# 遍历所有，如果文件名不包含 -recommended，就跳过
for version in forge_versions:
    # 如果不包含 -recommended，就跳过
    if '-recommended' not in version:
        continue

    # print(version)

    # version 是 value
    # version = forge_versions[version]

    # 包含的话，就去除 -recommended
    new_versions[version.replace('-recommended', '')] = forge_versions[version]


# pretty print

# 计算要下载多少
print('Total ' + str(len(new_versions)) + ' versions')

# 遍历所有版本
for version in new_versions:
    # https://maven.minecraftforge.net/net/minecraftforge/forge/1.19.3-44.1.0/forge-1.19.3-44.1.0-installer.jar

    full_version = version + '-' + new_versions[version]

    # 获取下载链接
    url = 'https://maven.minecraftforge.net/net/minecraftforge/forge/' + full_version + '/forge-' + full_version + \
          '-installer.jar'

    head = requests.head(url)

    if not head.ok:
        print('Skip ' + version + ' (not found)')
        continue
    # print file size mb
    print(str(int(head.headers['Content-Length']) / 1024 / 1024) + 'MB')

    # 保存到文件
    with open(folder + '/' + version + '.jar', 'wb') as f:
        f.write(requests.get(url).content)

    print('Downloaded ' + version)