"""
Tests for template helper utilities.

This module tests the template helper functions.
"""
from unittest.mock import Mock

import pytest

from src.server.utils.template_helpers import (
    get_base_context,
    list_available_templates,
    validate_template_exists,
)


class TestTemplateHelpers:
    """Test template helper utilities."""

    def test_get_base_context(self):
        """Test that base context is created correctly."""
        request = Mock()
        context = get_base_context(request, "Test Title")
        
        assert "request" in context
        assert context["request"] == request
        assert context["title"] == "Test Title"
        assert context["app_name"] == "Aniworld Download Manager"
        assert context["version"] == "1.0.0"

    def test_get_base_context_default_title(self):
        """Test that default title is used."""
        request = Mock()
        context = get_base_context(request)
        
        assert context["title"] == "Aniworld"

    def test_validate_template_exists_true(self):
        """Test template validation for existing template."""
        # index.html should exist
        exists = validate_template_exists("index.html")
        assert exists is True

    def test_validate_template_exists_false(self):
        """Test template validation for non-existing template."""
        exists = validate_template_exists("nonexistent.html")
        assert exists is False

    def test_list_available_templates(self):
        """Test listing available templates."""
        templates = list_available_templates()
        
        # Should be a list
        assert isinstance(templates, list)
        
        # Should contain at least the main templates
        expected_templates = [
            "index.html",
            "login.html",
            "setup.html",
            "queue.html",
            "error.html"
        ]
        for expected in expected_templates:
            assert expected in templates, (
                f"{expected} not found in templates list"
            )

    def test_list_available_templates_only_html(self):
        """Test that only HTML files are listed."""
        templates = list_available_templates()
        
        for template in templates:
            assert template.endswith(".html")

    @pytest.mark.parametrize("template_name", [
        "index.html",
        "login.html",
        "setup.html",
        "queue.html",
        "error.html"
    ])
    def test_all_required_templates_exist(self, template_name):
        """Test that all required templates exist."""
        assert validate_template_exists(template_name), \
            f"Required template {template_name} does not exist"