#!/usr/bin/env python3
"""Entrypoint and CLI handler."""

import argparse

import ansibledoctor.exception
from ansibledoctor import __version__
from ansibledoctor.config import SingleConfig
from ansibledoctor.doc_generator import Generator
from ansibledoctor.doc_parser import Parser
from ansibledoctor.utils import SingleLog


class AnsibleDoctor:
    """Main doctor object."""

    def __init__(self):
        self.log = SingleLog()
        self.logger = self.log.logger
        self.args = self._cli_args()
        self.config = self._get_config()

        doc_parser = Parser()
        doc_generator = Generator(doc_parser)
        doc_generator.render()

    def _cli_args(self):
        """
        Use argparse for parsing CLI arguments.

        :return: args objec
        """
        # TODO: add function to print to stdout instead of file
        parser = argparse.ArgumentParser(
            description="Generate documentation from annotated Ansible roles using templates"
        )
        parser.add_argument(
            "role_dir", nargs="?", help="role directory (default: current working dir)"
        )
        parser.add_argument(
            "-c", "--config", dest="config_file", help="location of configuration file"
        )
        parser.add_argument(
            "-o", "--output", dest="output_dir", action="store", help="output base dir"
        )
        parser.add_argument(
            "-f",
            "--force",
            dest="force_overwrite",
            action="store_true",
            default=None,
            help="force overwrite output file"
        )
        parser.add_argument(
            "-d",
            "--dry-run",
            dest="dry_run",
            action="store_true",
            default=None,
            help="dry run without writing"
        )
        parser.add_argument(
            "-n",
            "--no-role-detection",
            dest="role_detection",
            action="store_false",
            default=None,
            help="disable automatic role detection"
        )
        parser.add_argument(
            "-v", dest="logging.level", action="append_const", const=-1, help="increase log level"
        )
        parser.add_argument(
            "-q", dest="logging.level", action="append_const", const=1, help="decrease log level"
        )
        parser.add_argument(
            "--version", action="version", version="%(prog)s {}".format(__version__)
        )

        return parser.parse_args().__dict__

    def _get_config(self):
        try:
            config = SingleConfig(args=self.args)
        except ansibledoctor.exception.ConfigError as e:
            self.log.sysexit_with_message(e)

        try:
            self.log.set_level(config.config["logging"]["level"])
        except ValueError as e:
            self.log.sysexit_with_message("Can not set log level.\n{}".format(str(e)))

        if config.config["role_detection"]:
            if config.is_role:
                self.logger.info("Ansible role detected")
            else:
                self.log.sysexit_with_message("No Ansible role detected")
        else:
            self.logger.info("Ansible role detection disabled")

        self.logger.info("Using config file {}".format(config.config_file))

        return config


def main():
    AnsibleDoctor()