import os
import shutil
import tempfile
import hashlib
import time
import zipfile

# https://packs.steamwar.de/hello.txt

current_dir = os.getcwd()

def getVersions():
    directories = [name for name in os.listdir(current_dir) if os.path.isdir(os.path.join(current_dir, name)) and not name.startswith(".")]
    packVersions = []
    for s in directories:
        try:
            num = int(s)
            packVersions.append(num)
        except ValueError:
            pass
    packVersions.sort()
    return packVersions

def buildPack(dir, version):
    current_path = os.path.join(current_dir, str(version))
    copyFiles(current_path, dir)

    zip_folder(dir, current_path + ".zip")
    # shutil.make_archive(current_path, "zip", dir)
    current_path = current_path + ".zip"

    timestamp = time.mktime(time.strptime('1970-01-01 00:00:00', '%Y-%m-%d %H:%M:%S'))
    os.utime(current_path, (timestamp, timestamp))

    sha1 = sha1_of_file(current_path)
    os.rename(current_path, os.path.join(current_dir, str(version) + "_" + sha1 + ".zip"))

def copyFiles(src, dst):
    for root, dirs, files in os.walk(src):
        # Create corresponding path in destination
        rel_path = os.path.relpath(root, src)
        dest_path = os.path.join(dst, rel_path)
        os.makedirs(dest_path, exist_ok=True)

        for file in files:
            src_file = os.path.join(root, file)
            dst_file = os.path.join(dest_path, file)
            shutil.copy2(src_file, dst_file)  # Overwrites if exists

def zip_folder(folder_path, zip_file_path):
    with zipfile.ZipFile(zip_file_path, 'w', zipfile.ZIP_DEFLATED) as zipf:
        for root, dirs, files in os.walk(folder_path):
            for file in files:
                abs_path = os.path.join(root, file)
                rel_path = os.path.relpath(abs_path, folder_path)
                zipf.write(abs_path, rel_path)

def sha1_of_file(filepath):
    sha1 = hashlib.sha1()
    with open(filepath, 'rb') as f:
        while chunk := f.read(8192):  # read in 8KB chunks
            sha1.update(chunk)
    return sha1.hexdigest()

if __name__ == "__main__":
    versions=getVersions()
    with tempfile.TemporaryDirectory() as tmpdirname:
        for version in versions:
            buildPack(tmpdirname, version)