import logging
import os
import re

from flask import make_response, render_template
from flask_restful import reqparse

from config_app._init_config import ROOT_DIR


def truthy_bool(param):
    return param not in {False, 'false', 'False', '0', 'FALSE', '', 'null'}


DEFAULT_JS_BUNDLE_NAME = 'configapp'
PARAM_REGEX = re.compile(r'<([^:>]+:)*([\w]+)>')
logger = logging.getLogger(__name__)
TYPE_CONVERTER = {
    truthy_bool: 'boolean',
    str: 'string',
    basestring: 'string',
    reqparse.text_type: 'string',
    int: 'integer',
}


def _list_files(path, extension, contains=""):
    """ Returns a list of all the files with the given extension found under the given path. """

    def matches(f):
        return os.path.splitext(f)[1] == '.' + extension and contains in os.path.splitext(f)[0]

    def join_path(dp, f):
        # Remove the static/ prefix. It is added in the template.
        return os.path.join(dp, f)[len(ROOT_DIR) + 1 + len('config_app/static/'):]

    filepath = os.path.join(os.path.join(ROOT_DIR, 'config_app/static/'), path)
    return [join_path(dp, f) for dp, _, files in os.walk(filepath) for f in files if matches(f)]


def render_page_template(name, route_data=None, js_bundle_name=DEFAULT_JS_BUNDLE_NAME, **kwargs):
    """ Renders the page template with the given name as the response and returns its contents. """
    main_scripts = _list_files('build', 'js', js_bundle_name)

    contents = render_template(name,
                               route_data=route_data,
                               main_scripts=main_scripts,
                               **kwargs)

    resp = make_response(contents)
    resp.headers['X-FRAME-OPTIONS'] = 'DENY'
    return resp


def fully_qualified_name(method_view_class):
    return '%s.%s' % (method_view_class.__module__, method_view_class.__name__)