"""
Unit tests for FoodWiseNotionClient.

Tests cover all CRUD operations with mocked Notion API responses.
"""

import pytest
from unittest.mock import Mock, patch
from datetime import date
from pydantic import ValidationError

from src.foodwise.notion.notion_client import FoodWiseNotionClient


@pytest.fixture
def mock_notion_client():
    """Create a mock Notion client for testing."""
    return Mock()


@pytest.fixture
def foodwise_client(mock_notion_client, monkeypatch):
    """Create FoodWiseNotionClient with mocked Notion client."""
    # Mock environment variables
    monkeypatch.setenv("NOTION_SECRET", "test-secret")
    monkeypatch.setenv("NOTION_INVENTORY_DB_ID", "test-db-id")
    
    with patch('src.foodwise.notion.notion_client.Client', return_value=mock_notion_client):
        client = FoodWiseNotionClient()
        client.client = mock_notion_client
        return client


@pytest.fixture
def sample_item_data():
    """Sample item data for testing."""
    return {
        "name": "Test Apple",
        "category": "Fruits",
        "storage_type": "Pantry",
        "quantity": 5.0,
        "unit": "pieces",
        "best_by_date": "2024-12-31",
        "purchase_date": "2024-12-01"
    }


@pytest.fixture
def mock_notion_page():
    """Mock Notion page response."""
    return {
        'id': 'test-page-id-123',
        'url': 'https://notion.so/test-page',
        'properties': {
            'Name': {
                'title': [{'text': {'content': 'Test Apple'}}]
            },
            'Category': {
                'select': {'name': 'Fruits'}
            },
            'Storage Type': {
                'select': {'name': 'Pantry'}
            },
            'Quantity': {
                'number': 5.0
            },
            'Unit': {
                'select': {'name': 'pieces'}
            }
        }
    }


class TestFoodWiseNotionClient:
    """Test cases for FoodWiseNotionClient."""

    def test_add_inventory_item_success(self, foodwise_client, sample_item_data, mock_notion_page):
        """Test successful item addition."""
        foodwise_client.client.pages.create.return_value = mock_notion_page
        
        result = foodwise_client.add_inventory_item(sample_item_data)
        
        assert result['id'] == 'test-page-id-123'
        assert result['name'] == 'Test Apple'
        assert result['category'] == 'Fruits'
        foodwise_client.client.pages.create.assert_called_once()

    def test_add_inventory_item_failure(self, foodwise_client, sample_item_data):
        """Test item addition failure handling."""
        foodwise_client.client.pages.create.side_effect = Exception("Notion API Error")
        
        with pytest.raises(Exception, match="Failed to add item"):
            foodwise_client.add_inventory_item(sample_item_data)

    def test_query_inventory_success(self, foodwise_client, mock_notion_page):
        """Test successful inventory query."""
        foodwise_client.client.databases.query.return_value = {
            'results': [mock_notion_page]
        }
        
        result = foodwise_client.query_inventory()
        
        assert len(result) == 1
        assert result[0]['name'] == 'Test Apple'
        foodwise_client.client.databases.query.assert_called_once()

    def test_update_inventory_item_success(self, foodwise_client, mock_notion_page):
        """Test successful item update."""
        foodwise_client.client.pages.update.return_value = mock_notion_page
        
        update_data = {
            "quantity": 3.0,
            "best_by_date": date(2024, 12, 20)
        }
        
        result = foodwise_client.update_inventory_item("test-page-id", update_data)
        
        assert result['id'] == 'test-page-id-123'
        foodwise_client.client.pages.update.assert_called_once()

    def test_update_inventory_item_validation_error(self, foodwise_client):
        """Test update with invalid data."""
        invalid_data = {
            "quantity": "not-a-number"  # Invalid type
        }
        
        with pytest.raises(ValueError, match="Invalid update data"):
            foodwise_client.update_inventory_item("test-page-id", invalid_data)

    def test_update_inventory_item_empty_data(self, foodwise_client):
        """Test update with no valid fields."""
        with pytest.raises(Exception, match="No valid fields provided"):
            foodwise_client.update_inventory_item("test-page-id", {})

    def test_remove_inventory_item_success(self, foodwise_client):
        """Test successful item removal."""
        foodwise_client.client.pages.update.return_value = {"archived": True}
        
        result = foodwise_client.remove_inventory_item("test-page-id")
        
        assert result['success'] is True
        assert "archived successfully" in result['message']
        foodwise_client.client.pages.update.assert_called_once_with(
            page_id="test-page-id",
            archived=True
        )

    def test_remove_inventory_item_failure(self, foodwise_client):
        """Test item removal failure."""
        foodwise_client.client.pages.update.side_effect = Exception("Notion API Error")
        
        with pytest.raises(Exception, match="Failed to remove item"):
            foodwise_client.remove_inventory_item("test-page-id")

    def test_search_items_success(self, foodwise_client, mock_notion_page):
        """Test successful item search."""
        foodwise_client.client.databases.query.return_value = {
            'results': [mock_notion_page]
        }
        
        result = foodwise_client.search_items("apple")
        
        assert len(result) == 1
        assert result[0]['name'] == 'Test Apple'

    def test_get_expiring_items_success(self, foodwise_client, mock_notion_page):
        """Test successful expiring items query."""
        foodwise_client.client.databases.query.return_value = {
            'results': [mock_notion_page]
        }
        
        result = foodwise_client.get_expiring_items(7)
        
        assert len(result) == 1
        foodwise_client.client.databases.query.assert_called_once()


class TestPartialFoodInventoryItem:
    """Test the PartialFoodInventoryItem validation."""

    def test_valid_partial_data(self):
        """Test validation with valid partial data."""
        from src.foodwise.database.db_models import PartialFoodInventoryItem
        
        data = {
            "name": "Test Item",
            "quantity": 2.5
        }
        
        validated = PartialFoodInventoryItem.model_validate(data)
        assert validated.name == "Test Item"
        assert validated.quantity == 2.5
        assert validated.category is None

    def test_invalid_partial_data(self):
        """Test validation with invalid data types."""
        from src.foodwise.database.db_models import PartialFoodInventoryItem
        
        data = {
            "quantity": "not-a-number"
        }
        
        with pytest.raises(ValidationError):
            PartialFoodInventoryItem.model_validate(data)

    def test_empty_partial_data(self):
        """Test validation with empty data."""
        from src.foodwise.database.db_models import PartialFoodInventoryItem
        
        validated = PartialFoodInventoryItem.model_validate({})
        assert all(getattr(validated, field) is None for field in PartialFoodInventoryItem.model_fields)