#!/usr/bin/python3
# Copyright (C) 2023 Sofus Albert Høgsbro Rose
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

import sys
if not all([
	sys.version_info.major == 3,
	sys.version_info.minor in [9, 10, 11, 12, 13],
]):
	sys.exit(1)

import os
from pathlib import Path
from uuid import uuid4
import platform
import shutil
import subprocess
import contextlib

####################
# - Constants
####################
SCRIPT_PATH = Path(__file__).resolve().parent

CMD_DEPENDENCIES = [
	'podman',
	'git',
]

PATH_COMPILE_ATAT = SCRIPT_PATH / 'scripts' / 'compile-debian.sh'
ATAT_GIT_URL = "https://git.sofus.io/so-rose/atat-mirror.git"

IMAGE_NAME = "docker.io/debian"
IMAGE_TAG_FMT = "{}-slim"


####################
# - Utilities
####################
@contextlib.contextmanager
def cd_dir(path_dir):
	cwd_orig = Path.cwd()
	
	os.chdir(path_dir)
	try:
		yield
	finally:
		os.chdir(cwd_orig)

def cmd_exists(cmd: str) -> bool:
	"""Checks if a command exists. Supports Linux, Mac, Windows.
	"""
	return shutil.which(cmd) is not None



####################
# - Actions - Run
####################
def action_compile(debian_release: str) -> None:
	path_atat_mirror = (SCRIPT_PATH / '.atat-mirror')
	path_atat_bin = (SCRIPT_PATH / 'bin')
	path_atat_bin.mkdir(exist_ok=True)
	
	subprocess.run([
		"git", "clone", ATAT_GIT_URL, path_atat_mirror
	])
	
	with open(PATH_COMPILE_ATAT, 'r') as f:
		subprocess.run([
			"podman", "run", "--rm", "-it",
			"--volume", f"{path_atat_mirror}:/src",
			"--volume", f"{path_atat_bin}:/root/bin",
			"--workdir", "/src",
			f"{IMAGE_NAME}:{IMAGE_TAG_FMT.format(debian_release)}",
			"bash", "-xc", f.read()
		])



####################
# - Script
####################
if __name__ == "__main__":
	# Check Available Commands
	for cmd in CMD_DEPENDENCIES:
		if not cmd_exists(cmd) :
			print(f"{cmd} is not installed. Please see --help for instructions.")
			sys.exit(1)
	
	with cd_dir(SCRIPT_PATH):
		{
			"compile": action_compile,
		}[sys.argv[1]](*sys.argv[2:])