import os

from repo_cloner.lib.default_cloner_config import DefaultClonerConfig
from repo_cloner.lib.config_file_not_found_error import ConfigFileNotFoundError
import logging

l = logging.getLogger("rc.cfg")


class ClonerConfig(DefaultClonerConfig):
	def __init__(self):
		super().__init__()
		self.__properties = list(filter(self.has_property, dir(self)))
		self.__values = {}

	def __try_default(self, key: str, default_value):
		if not self.has_property(key):
			raise KeyError(f"{key} is not recognized config option")
		if key in self.__values:
			return self.__values[key]
		return default_value

	@property
	def cloner_project_name(self) -> str:
		return self.__try_default("cloner_project_name", super(ClonerConfig, self).cloner_project_name)

	@property
	def cloner_repo_url(self) -> str:
		return self.__try_default("cloner_repo_url", super(ClonerConfig, self).cloner_repo_url)

	@property
	def cloner_interval(self) -> int:
		return self.__try_default("cloner_interval", super(ClonerConfig, self).cloner_interval)

	@property
	def cloner_submodules(self) -> bool:
		return self.__try_default("cloner_submodules", super(ClonerConfig, self).cloner_submodules)

	@property
	def cloner_submodule_depth(self) -> int:
		return self.__try_default("cloner_submodule_depth", super(ClonerConfig, self).cloner_submodule_depth)

	def _set_property(self, key: str, value):
		if not self.has_property(key):
			raise KeyError(f"{key} is not recognized config option")

		requested_type = type(self.__getattribute__(key));
		if not isinstance(value, requested_type):
			l.debug(f"Trying conversion of {key} from {type(value)} to {requested_type}")
			try:
				if requested_type == bool:
					value = True if value == "1" else False
				else:
					value = requested_type(value)
				l.debug(f"Conversion result: {type(value)}: {value}")
			except Exception as e:
				l.critical(f"Conversion failed! ({str(e)}")
				raise ValueError(
					f"Invalid value for key {key}: type is {type(value)} instead of {requested_type}, conversion failed")
		self.__values[key] = value


class ClonerConfigParser:
	__file: str = ""
	__invalid_lines: list = []

	def __init__(self, config_file: str):
		self.__file = config_file
		self.__config = ClonerConfig()
		self.__invalid_lines = []
		l.info(f"Parsing cloner config file: {self.__file}")

		if not os.path.exists(self.__file):
			l.critical(f"Config file: {self.__file} does not exist!")
			raise ConfigFileNotFoundError(self.__file)

		# parse config file
		raw_lines = []
		with open(self.__file, "r") as f:
			raw_lines = f.readlines()
		l.debug(f"Readen {len(raw_lines)} lines")
		lines = []

		# strip lines, remove comments
		line: str = ""
		for line in raw_lines:
			if not line.startswith('#'):
				line = line.strip()
				# empty line? skip
				if len(line) > 0:
					lines.append(line)
		l.debug(f"Found {len(lines)} config lines")

		for line in lines:
			if not "=" in line:
				l.warning(f"Line '{line}' has invalid format!")
				self.__invalid_lines.append((line, None))
				continue
			eq = line.find("=")
			key: str = line[0:eq]
			val: str = line[eq + 1:]
			l.debug(f"Found config pair: {key} => '{val}'")

			try:
				self.__config._set_property(key, val)
			except BaseException as e:
				self.__invalid_lines.append((key, val))
				l.critical(str(e))

	@property
	def config(self) -> ClonerConfig:
		return self.__config

	@property
	def invalid(self) -> bool:
		return len(self.__invalid_lines) > 0

	@property
	def invalid_lines(self):
		return self.__invalid_lines