"""Tests for core configuration module."""

import os

import pytest

from app.core.config import Settings, get_settings


class TestSettings:
    """Test cases for Settings configuration."""

    def test_default_values(self):
        """Test that default values are set correctly."""
        settings = Settings()
        
        assert settings.PROJECT_NAME == "WealthWise"
        assert settings.API_V1_STR == "/api/v1"
        assert settings.VERSION == "1.0.0"
        assert settings.DB_POOL_SIZE == 20
        assert settings.DB_MAX_OVERFLOW == 10
        assert settings.DEBUG is False

    def test_database_url_validation(self):
        """Test that database URL is validated and converted to asyncpg."""
        # Test conversion from postgresql:// to postgresql+asyncpg://
        settings = Settings(DATABASE_URL="postgresql://user:pass@localhost:5432/db")
        assert settings.DATABASE_URL.startswith("postgresql+asyncpg://")
        
        # Test that asyncpg URL is preserved
        asyncpg_url = "postgresql+asyncpg://user:pass@localhost:6543/postgres"
        settings2 = Settings(DATABASE_URL=asyncpg_url)
        assert settings2.DATABASE_URL == asyncpg_url

    def test_cors_origins_parsing(self):
        """Test CORS origins parsing from string."""
        settings = Settings(CORS_ORIGINS="http://localhost:5173,https://example.com")
        assert "http://localhost:5173" in settings.CORS_ORIGINS
        assert "https://example.com" in settings.CORS_ORIGINS
        
        # Test list input
        settings2 = Settings(CORS_ORIGINS=["http://localhost:3000"])
        assert settings2.CORS_ORIGINS == ["http://localhost:3000"]


class TestGetSettings:
    """Test cases for get_settings function."""

    def test_get_settings_returns_singleton(self):
        """Test that get_settings returns a cached singleton."""
        settings1 = get_settings()
        settings2 = get_settings()
        
        # Should be the same object (cached)
        assert settings1 is settings2