#!/usr/bin/env python3
import os

import yaml

from ansibledoctor.Utils import Singleton


class Config:
    sample_config = """---
# filename: doctor.conf.yaml

# base directoy to scan, relative dir to configuration file
# base_dir: "./"

# documentation output directory, relative dir to configuration file.
output_dir: "./doc"

# directory containing templates, relative dir to configuration file,
# comment to use default build in ones
# template_dir: "./template"

# template directory name within template_dir
# build in "doc_and_readme" and "readme"
template: "readme"

# Overwrite documentation pages if already exist
# this is equal to -y
# template_overwrite : False

# set the debug level: trace | debug | info | warn
# see -v | -vv | -vvv
# debug_level: "warn"

# when searching for yaml files in roles projects,
# excluded this paths (dir and files) from analysis
# default values
excluded_roles_dirs: []

"""
    # path to the documentation output dir
    output_dir = ""

    # project base directory
    _base_dir = ""

    # current directory of this object,
    # used to get the default template directory
    script_base_dir = ""

    # path to the directory that contains the templates
    template_dir = ""
    # default template name
    default_template = "readme"
    # template to use
    template = ""
    # flag to ask if files can be overwritten
    template_overwrite = False
    # flag to use the cli print template
    use_print_template = False

    # don"t modify any file
    dry_run = False

    # default debug level
    debug_level = "warn"

    # internal flag
    is_role = None
    # internal when is_rote is True
    project_name = ""

    # name of the config file to search for
    config_file_name = "doctor.conf.yaml"
    # if config file is not in root of project, this is used to make output relative to config file
    _config_file_dir = ""

    excluded_roles_dirs = []

    # annotation search patterns

    # for any pattern like " # @annotation: [annotation_key] # description "
    # name = annotation ( without "@" )
    # allow_multiple = True allow to repeat the same annotation, i.e. @todo
    # automatic = True this action will be parsed based on the annotation in name without calling the parse method

    annotations = {
        "meta": {
            "name": "meta",
            "automatic": True
        },
        "todo": {
            "name": "todo",
            "automatic": True,
        },
        "var": {
            "name": "var",
            "automatic": True,
        },
        "example": {
            "name": "example",
            "regex": r"(\#\ *\@example\ *\: *.*)"
        },
        "tag": {
            "name": "tag",
            "automatic": True,
        },
    }

    def __init__(self):
        self.script_base_dir = os.path.dirname(os.path.realpath(__file__))

    def set_base_dir(self, directory):
        self._base_dir = directory
        self._set_is_role()

    def get_base_dir(self):
        return self._base_dir

    def get_annotations_definition(self, automatic=True):
        annotations = {}

        if automatic:
            for k, item in self.annotations.items():
                if "automatic" in item.keys() and item["automatic"]:
                    annotations[k] = item

        return annotations

    def get_annotations_names(self, automatic=True):

        annotations = []

        if automatic:
            for k, item in self.annotations.items():
                if "automatic" in item.keys() and item["automatic"]:
                    annotations.append(k)

        return annotations

    def _set_is_role(self):
        if os.path.isdir(self._base_dir + "/tasks"):
            self.is_role = True
        else:
            self.is_role = None

    def get_output_dir(self):
        """
        Get the relative path to cwd of the output directory for the documentation.

        :return: str path
        """
        if self.use_print_template:
            return ""
        if self.output_dir == "":
            return os.path.realpath(self._base_dir)
        elif os.path.isabs(self.output_dir):
            return os.path.realpath(self.output_dir)
        elif not os.path.isabs(self.output_dir):
            return os.path.realpath(self._config_file_dir + "/" + self.output_dir)

    def get_template_base_dir(self):
        """
        Get the base dir for the template to use.

        :return: str abs path
        """
        if self.use_print_template:
            return os.path.realpath(self.script_base_dir + "/templates/cliprint")

        if self.template == "":
            template = self.default_template
        else:
            template = self.template

        if self.template_dir == "":
            return os.path.realpath(self.script_base_dir + "/templates/" + template)
        elif os.path.isabs(self.template_dir):
            return os.path.realpath(self.template_dir + "/" + template)
        elif not os.path.isabs(self.template_dir):
            return os.path.realpath(self._config_file_dir + "/" + self.template_dir + "/" + template)

    def load_config_file(self, file):

        allow_to_overwrite = [
            "base_dir",
            "output_dir",
            "template_dir",
            "template",
            "template_overwrite",
            "debug_level",
            "excluded_roles_dirs",

        ]

        with open(file, "r") as yaml_file:
            try:
                self._config_file_dir = os.path.dirname(os.path.realpath(file))
                data = yaml.safe_load(yaml_file)
                if data:
                    for item_to_configure in allow_to_overwrite:
                        if item_to_configure in data.keys():
                            self.__setattr__(item_to_configure, data[item_to_configure])

            except yaml.YAMLError as exc:
                print(exc)


class SingleConfig(Config, metaclass=Singleton):
    pass