#!/usr/bin/env python3
from repo_cloner.lib.logger_setup import log
import argparse
import logging
import os
import subprocess
import base64
from repo_cloner.lib.repo_dir_structure import RepoDirStructure
from repo_cloner.lib import Cloner, DetectedCommit, prepare_git_auth, init_gh_token

laminar_binary: str = ""


def determine_binary() -> str:
	global laminar_binary
	log.debug(f"Looking for laminar binary")
	rc = subprocess.run(["/usr/bin/which", "laminarc", "echo"], stdout = subprocess.PIPE, stderr = subprocess.DEVNULL)
	binary = rc.stdout.decode().splitlines()[0].strip()
	if rc.returncode == 0:
		log.debug(f"Laminar binary found in {binary}")
	else:
		log.warning(f"laminarc binary was not found - using {binary} as replacement for debugging")
	return binary


def detector_executor(commit: DetectedCommit):
	message = base64.b64encode(commit.log.encode()).decode()
	env = {
		"sha":          commit.commit,
		"abbrev":       commit.abbrev,
		"author":       commit.author,
		"has_tags":     commit.is_tag,
		"has_branches": commit.is_branch,
		"tags":         commit.tags,
		"branches":     commit.branches,
		"date":         commit.date,
		"log":          message,
	}

	arg_list = [laminar_binary, "queue", commit.project]

	for key, val in env.items():
		arg_list.append(f"COMMIT_{key.upper()}={val}")

	subprocess.run(arg_list)


def clone_or_fetch(base_dir: str, clone_init: bool = False, detector_init: bool = False):
	global laminar_binary
	log.info(f"Started processing git group in folder: {base_dir}")
	dirs = RepoDirStructure(base_dir)
	log.debug(f"Patching XDG_CONFIG_HOME to mock up git config")
	os.environ['XDG_CONFIG_HOME'] = dirs.conf_dir

	init_gh_token()

	# check dir existence
	try:
		assert dirs.dirs_exist
	except Exception as e:
		log.critical(f"Dir structure problem: {e.__str__()}")
		return 1

	# does config exist?
	try:
		assert dirs.has_config
	except Exception as e:
		log.critical(f"Config file not found!?")
		log.critical(e.__str__())
		return 1

	# check if there is project name & git url supplied
	config = dirs.config
	if len(config.cloner_repo_url) == 0:
		log.critical("Config directive cloner_repo_url is missing/empty! Cannot continue!")
		return 1

	if len(config.cloner_project_name) == 0:
		log.warning("Config directive cloner_project_name should not be omitted!")

	cloner = Cloner(dirs)
	prepare_git_auth(dirs.conf_dir)

	if clone_init:
		log.info(f"Initial cloning of repositories")
		if not cloner.clone():
			return 1
		if detector_init:
			cloner.detector_init()
		return 0

	# regular run
	if not cloner.sync():
		log.warning(f"Repo sync did not succeed")

	laminar_binary = determine_binary()

	if cloner.detector_enabled:
		cloner.detector_run(detector_executor)

	return 0


def main() -> int:
	# parse input arguments
	parser = argparse.ArgumentParser(description = "repo-cloner entering script")
	parser.add_argument('--base-dir', help = 'path to directory containing whole cloner structure', required = True,
						default = None, type = str)
	parser.add_argument('--debug', '-d', help = "enable debug output", action = 'store_true')
	parser.add_argument('--colored', help = "enable colored log output even tty() is not detected")
	args = parser.parse_args()
	if args.debug:
		log.setLevel(logging.DEBUG)

	return clone_or_fetch(args.base_dir)


if __name__ == "__main__":
	exit(main())