import pytest
import asyncio
from typing import Generator, Any
from fastapi import FastAPI
from fastapi.testclient import TestClient
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from app import app as main_app
from services.database_service import DatabaseService
import os
import tempfile
import base64
from PIL import Image
import io

# Test database URL
TEST_DATABASE_URL = "sqlite:///./test.db"

@pytest.fixture(scope="session")
def app() -> Generator[FastAPI, Any, None]:
    """
    Create a FastAPI test app
    """
    yield main_app

@pytest.fixture(scope="session")
def client(app: FastAPI) -> Generator[TestClient, Any, None]:
    """
    Create a test client
    """
    with TestClient(app) as test_client:
        yield test_client

@pytest.fixture(scope="function")
def db_service():
    """
    Create a database service for testing
    """
    service = DatabaseService()
    # Use test database
    service.supabase = None  # Mock for testing
    yield service

@pytest.fixture(scope="function")
def auth_headers():
    """
    Create authentication headers for testing
    """
    return {"Authorization": "Bearer test_token"}

@pytest.fixture(scope="function")
def sample_image():
    """
    Create a sample image for testing
    """
    # Create a simple test image
    img = Image.new('RGB', (100, 100), color='red')
    img_byte_arr = io.BytesIO()
    img.save(img_byte_arr, format='JPEG')
    img_byte_arr = img_byte_arr.getvalue()
    
    return base64.b64encode(img_byte_arr).decode('utf-8')

@pytest.fixture(scope="function")
def sample_skin_tone():
    """
    Sample skin tone data
    """
    return {
        "primary_tone": "medium",
        "undertone": "warm",
        "melanin_level": 45.5,
        "rgb_values": {
            "r": 180,
            "g": 120,
            "b": 80,
            "hex": "B47850"
        }
    }

@pytest.fixture(scope="function")
def sample_conditions():
    """
    Sample skin conditions
    """
    return [
        {"condition": "blackheads", "severity": "mild", "confidence": 85.5},
        {"condition": "oily_skin", "severity": "moderate", "confidence": 92.0}
    ]

@pytest.fixture(scope="function")
def sample_user():
    """
    Sample user data
    """
    return {
        "id": "test_user_123",
        "email": "test@example.com",
        "name": "Test User",
        "created_at": "2024-01-01T00:00:00Z"
    }

@pytest.fixture(scope="function")
def event_loop():
    """
    Create an event loop for async tests
    """
    loop = asyncio.get_event_loop_policy().new_event_loop()
    yield loop
    loop.close()