"""
Tests for configuration settings and helper functions.
"""
import pytest
import os
from config import Config
from app import get_application_path, get_data_file_path, get_attachments_path


class TestConfiguration:
    """Tests for Config class."""

    def test_config_has_required_settings(self):
        """Test that all required configuration values exist."""
        assert hasattr(Config, 'SECRET_KEY')
        assert hasattr(Config, 'MAIL_SERVER')
        assert hasattr(Config, 'MAIL_PORT')
        assert hasattr(Config, 'MAIL_USE_TLS')
        assert hasattr(Config, 'APPLICATIONS_FOLDER')
        assert hasattr(Config, 'MAX_FILE_SIZE')
        assert hasattr(Config, 'MAX_FILES')
        assert hasattr(Config, 'ALLOWED_EXTENSIONS')
        assert hasattr(Config, 'MAX_STRING_LENGTH')
        assert hasattr(Config, 'MAX_TEXT_AREA_LENGTH')
        assert hasattr(Config, 'MAX_ZIP_DIGITS')
        assert hasattr(Config, 'MIN_BIRTH_YEAR')
        assert hasattr(Config, 'MAX_BIRTH_YEAR')

    def test_file_size_limit(self):
        """Test that file size limit is set correctly."""
        assert Config.MAX_FILE_SIZE == 4 * 1024 * 1024  # 4 MB

    def test_max_files_limit(self):
        """Test that maximum number of files is set correctly."""
        assert Config.MAX_FILES == 3

    def test_allowed_extensions(self):
        """Test that allowed file extensions are configured."""
        assert isinstance(Config.ALLOWED_EXTENSIONS, set)
        assert 'pdf' in Config.ALLOWED_EXTENSIONS
        assert 'doc' in Config.ALLOWED_EXTENSIONS
        assert 'docx' in Config.ALLOWED_EXTENSIONS

    def test_string_length_limits(self):
        """Test that string length limits are set."""
        assert Config.MAX_STRING_LENGTH == 255
        assert Config.MAX_TEXT_AREA_LENGTH == 3000
        assert Config.MAX_ZIP_DIGITS == 10

    def test_birth_year_range(self):
        """Test that birth year range is configured correctly."""
        assert Config.MIN_BIRTH_YEAR == 1940
        assert Config.MAX_BIRTH_YEAR == 2010
        assert Config.MIN_BIRTH_YEAR < Config.MAX_BIRTH_YEAR


class TestPathHelpers:
    """Tests for path helper functions."""

    def test_get_application_path(self, app):
        """Test get_application_path returns correct path."""
        session_id = 'test-123'
        expected_path = os.path.join(app.config['APPLICATIONS_FOLDER'], session_id)
        assert get_application_path(session_id) == expected_path

    def test_get_data_file_path(self, app):
        """Test get_data_file_path returns correct YAML file path."""
        session_id = 'test-456'
        expected_path = os.path.join(
            app.config['APPLICATIONS_FOLDER'],
            session_id,
            'data.yaml'
        )
        assert get_data_file_path(session_id) == expected_path

    def test_get_attachments_path(self, app):
        """Test get_attachments_path returns correct attachments directory path."""
        session_id = 'test-789'
        expected_path = os.path.join(
            app.config['APPLICATIONS_FOLDER'],
            session_id,
            'attachments'
        )
        assert get_attachments_path(session_id) == expected_path

    def test_path_helpers_with_special_characters(self, app):
        """Test path helpers handle session IDs with special characters."""
        session_id = 'test-abc-123-def'
        app_path = get_application_path(session_id)
        assert session_id in app_path
        assert os.path.isabs(app_path) or app_path.startswith('.')