from git import Repo, GitConfigParser
import logging
import os

log = logging.getLogger("rc.cfghelper")


def config_try_override(config_writer: GitConfigParser, section: str, option: str, value: str):
	if section not in config_writer.sections():
		log.debug(f"CFG Creating section: {section}")
		config_writer.add_section(section)
	if not config_writer.has_option(section, option):
		log.debug(f"CFG Creating option: {option}")
		config_writer.add_value(section, option, "")

	log.debug(f"Setting {section}.{option} = {value}")
	config_writer.set(section, option, value)


def prepare_git_auth(repo: str, config_dir):
	log.debug(f"CFG: Opening repo {repo}")
	repo = Repo(repo)
	path: str = repo._get_config_path("user")
	log.debug(f"CFG config path: {path}")
	path = os.path.dirname(path)
	log.debug(f"CFG parent path: {path}")
	if not os.path.isdir(path):
		log.debug(f"CFG Creating config dir")
		os.mkdir(path)

	cred_store: str = os.path.join(path, "git-credentials")
	ssh_identity: str = os.path.join(config_dir, "ssh", "identity")

	with repo.config_writer("user") as cfgw:
		log.debug(f"Writing credential store setting")
		config_try_override(cfgw, "credential", "helper", f"store --file={cred_store}")
		log.debug(f"Writing SSH cert path")
		config_try_override(
			cfgw,
			"core",
			"sshcommand",
			f"ssh -i {ssh_identity} -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o BatchMode=yes -q"
		)