# -*- coding: utf-8 -*-
# Author: Adrián Tóth <adtoth@redhat.com>
#
# Copyright (c) 2020, Red Hat, Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

import re
from typing import Any, Dict, Union

from ansiblelint.rules import AnsibleLintRule


class NestedJinjaRule(AnsibleLintRule):
    id = 'no-jinja-nesting'
    shortdesc = 'Nested jinja pattern'
    description = (
        "There should not be any nested jinja pattern. "
        "Example (bad): ``{{ list_one + {{ list_two | max }} }}``, "
        "Example (good): ``{{ list_one + max(list_two) }}``, "
        "Example (allowed): ``--format='{{'{{'}}.Size{{'}}'}}'``"
    )
    severity = 'VERY_HIGH'
    tags = ['formatting']
    version_added = 'v4.3.0'

    pattern = re.compile(r"{{(?:[^{}]*)?[^'\"]{{")

    def matchtask(self, task: Dict[str, Any]) -> Union[bool, str]:

        command = "".join(
            str(value)
            # task properties are stored in the 'action' key
            for key, value in task['action'].items()
            # exclude useless values of '__file__', '__ansible_module__', '__*__', etc.
            if not key.startswith('__') and not key.endswith('__')
        )

        return bool(self.pattern.search(command))
