# -*- coding: utf-8 -*-
# Copyright (c) 2017-2020 Christiaan Frans Rademan <chris@fwiw.co.za>.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
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#   this software without specific prior written permission.
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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import os

from luxon import g


class Theme():
    """Class to deterime the Theme in use.

    Args:
        app (obj): obj of class luxon.core.app.App

    Returns:
        Location of Theme directory.

    """
    def __init__(self, app):
        self._default_theme = app.config.get(
            'application', 'default_theme',
            fallback='default')
        self._static_web_path = app.config.get(
            'application', 'static',
            fallback='/static').rstrip('/')
        self._static_file_path = app.path.rstrip('/') + '/static'

        self._static_web_path += '/themes/'
        self._static_file_path += '/themes/'

    def __call__(self, the_file):
        # Remove / on both ends the_file
        the_file = the_file.strip('/')

        # Get Current Domain/Host
        host = g.current_request.host

        # Domain Theme
        check_file = host + '/' + the_file
        if os.path.isfile(self._static_file_path + check_file):
            return self._static_web_path + check_file

        # Default Theme
        check_file = self._default_theme + '/' + the_file
        if os.path.isfile(self._static_file_path + check_file):
            return self._static_web_path + check_file

        # Builtin Tachyonic Theme
        check_file = 'default' + '/' + the_file
        if os.path.isfile(self._static_file_path + check_file):
            return self._static_web_path + check_file

        raise FileNotFoundError("Missing static" +
                                " content '%s'" %
                                (self._static_web_path + check_file,))
