"""Tests for slug validation utility."""

import pytest

from app.utilities.slug_validation import (
    RESERVED_SLUGS,
    validate_slug_format,
    slug_to_db_name,
)


class TestValidateSlugFormat:
    """Tests for validate_slug_format."""

    @pytest.mark.parametrize("slug", [
        "abc",                # min length
        "mysite",             # simple
        "site1",              # with numbers
        "my-site",            # with hyphen
        "a1b2c3",             # mixed
        "my-cool-site",       # multiple hyphens
        "a" * 20,             # max length
        "1abc",               # starts with number
        "abc1",               # ends with number
    ])
    def test_valid_slugs(self, slug):
        result = validate_slug_format(slug)
        assert result['valid'] is True
        assert result['message'] == ''

    @pytest.mark.parametrize("slug,expected_msg_fragment", [
        ("ab", "at least 3"),                          # too short
        ("a", "at least 3"),                           # too short
        ("", "at least 3"),                            # empty
        ("a" * 21, "no more than 20"),                 # too long
        ("-mysite", "start and end"),                  # starts with hyphen
        ("mysite-", "start and end"),                  # ends with hyphen
        ("-", "at least 3"),                           # just a hyphen (too short)
        ("my--site", "consecutive hyphens"),           # consecutive hyphens
        ("MySite", "lowercase"),                       # uppercase
        ("my_site", "lowercase"),                      # underscore
        ("my site", "lowercase"),                      # space
        ("my.site", "lowercase"),                      # dot
    ])
    def test_invalid_slugs(self, slug, expected_msg_fragment):
        result = validate_slug_format(slug)
        assert result['valid'] is False
        assert expected_msg_fragment in result['message']

    def test_all_reserved_slugs_blocked(self):
        for slug in RESERVED_SLUGS:
            result = validate_slug_format(slug)
            assert result['valid'] is False, f"Reserved slug '{slug}' was not blocked"
            assert 'reserved' in result['message']

    def test_reserved_slugs_list_not_empty(self):
        assert len(RESERVED_SLUGS) > 0


class TestSlugToDbName:
    """Tests for slug_to_db_name."""

    def test_no_hyphens(self):
        assert slug_to_db_name("mysite") == "mysite"

    def test_single_hyphen(self):
        assert slug_to_db_name("my-site") == "my_site"

    def test_multiple_hyphens(self):
        assert slug_to_db_name("my-cool-site") == "my_cool_site"