# Copyright (c) 2018, Ansible Project

import re

import six

from ansiblelint import AnsibleLintRule


class MetaTagValidRule(AnsibleLintRule):
    id = '702'
    shortdesc = 'Tags must contain lowercase letters and digits only'
    description = (
        'Tags must contain lowercase letters and digits only, '
        'and ``galaxy_tags`` is expected to be a list'
    )
    severity = 'HIGH'
    tags = ['metadata']
    version_added = 'v4.0.0'

    TAG_REGEXP = re.compile('^[a-z0-9]+$')

    def matchplay(self, file, data):
        if file['type'] != 'meta':
            return False

        galaxy_info = data.get('galaxy_info', None)
        if not galaxy_info:
            return False

        tags = []
        results = []

        if 'galaxy_tags' in galaxy_info:
            if isinstance(galaxy_info['galaxy_tags'], list):
                tags += galaxy_info['galaxy_tags']
            else:
                results.append(({'meta/main.yml': data},
                                "Expected 'galaxy_tags' to be a list"))

        if 'categories' in galaxy_info:
            results.append(({'meta/main.yml': data},
                            "Use 'galaxy_tags' rather than 'categories'"))
            if isinstance(galaxy_info['categories'], list):
                tags += galaxy_info['categories']
            else:
                results.append(({'meta/main.yml': data},
                                "Expected 'categories' to be a list"))

        for tag in tags:
            msg = self.shortdesc
            if not isinstance(tag, six.string_types):
                results.append((
                    {'meta/main.yml': data},
                    "Tags must be strings: '{}'".format(tag)))
                continue
            if not re.match(self.TAG_REGEXP, tag):
                results.append(({'meta/main.yml': data},
                                "{}, invalid: '{}'".format(msg, tag)))

        return results
