#!/bin/python3
import os
import subprocess
import date
import datetime
import struct
import binascii

global commit_hash
global commit_tag
global commit_branch


def derive_version():
    commit_tag + "." + struct.unpack("h", binascii.unhexlify())

versioning_folder = os.path.join("LibHISP", "Resources", "Versioning")
if not os.path.exists(versioning_folder):
    os.mkdir(versioning_folder)

commit_hash = "0"*40
commit_tag = "v0.0.0"
commit_branch = "master"

try:
    commit_hash = subprocess.run(['git', 'rev-parse', '--verify', 'HEAD'], stdout=subprocess.PIPE).stdout.replace(b"\r", b"").replace(b"\n", b"").decode("UTF-8")
    commit_tag = subprocess.run(['git', 'describe', '--abbrev=0', '--tags'], stdout=subprocess.PIPE).stdout.replace(b"\r", b"").replace(b"\n", b"").decode("UTF-8")
    commit_branch = subprocess.run(['git', 'branch', '--show-current'], stdout=subprocess.PIPE).stdout.replace(b"\r", b"").replace(b"\n", b"").decode("UTF-8")
except FileNotFoundError:
    print("Git not installed")

commit_date = datetime.datetime.now().strftime("%d/%m/%Y")
commit_time = datetime.datetime.now().strftime("%H:%M:%S")

open(os.path.join(versioning_folder, "GitCommit"), "w").write(commit_hash)
open(os.path.join(versioning_folder, "GitTag"   ), "w").write(commit_tag)
open(os.path.join(versioning_folder, "GitBranch"), "w").write(commit_branch)
open(os.path.join(versioning_folder, "BuildDate"), "w").write(commit_date)
open(os.path.join(versioning_folder, "BuildTime"), "w").write(commit_time)