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"""
Comprehensive Tests for Contact Router

Tests cover:
1. POST /contact - Contact form submission
2. Authentication requirements
3. Data validation
4. Rate limiting
5. Email notification (mocked)

Uses mocked database and user authentication.
"""
import pytest
from unittest.mock import MagicMock, AsyncMock, patch
from fastapi.testclient import TestClient
from fastapi import FastAPI


# ============================================================================
# 1. Contact Form Submission Tests
# ============================================================================

class TestContactSubmission:
    """Test contact form submission."""
    
    def test_contact_requires_auth(self):
        """Contact endpoint requires authentication."""
        from routers.contact import router
        
        app = FastAPI()
        app.include_router(router)
        client = TestClient(app)
        
        response = client.post("/contact", json={"message": "Test"})
        
        # Should fail without auth (500 because no request.state.user)
        assert response.status_code == 500
    
    def test_submit_contact_with_auth(self):
        """Authenticated users can submit contact forms."""
        from routers.contact import router
        from core.database import get_db
        
        app = FastAPI()
        
        # Mock user
        mock_user = MagicMock()
        mock_user.id = 1
        mock_user.user_id = "usr_contact"
        mock_user.email = "user@example.com"
        
        # Mock database
        async def mock_get_db():
            mock_db = AsyncMock()
            yield mock_db
        
        # Middleware to set user
        @app.middleware("http")
        async def add_user(request, call_next):
            request.state.user = mock_user
            return await call_next(request)
        
        app.dependency_overrides[get_db] = mock_get_db
        app.include_router(router)
        client = TestClient(app)
        
        response = client.post(
            "/contact",
            json={
                "subject": "Help needed",
                "message": "I need assistance with my account"
            }
        )
        
        assert response.status_code == 200
        data = response.json()
        assert data["success"] == True
    
    def test_contact_with_subject(self):
        """Can submit contact with subject."""
        from routers.contact import router
        from core.database import get_db
        
        app = FastAPI()
        
        mock_user = MagicMock()
        mock_user.id = 1
        mock_user.email = "user@example.com"
        
        async def mock_get_db():
            yield AsyncMock()
        
        @app.middleware("http")
        async def add_user(request, call_next):
            request.state.user = mock_user
            return await call_next(request)
        
        app.dependency_overrides[get_db] = mock_get_db  
        app.include_router(router)
        client = TestClient(app)
        
        response = client.post(
            "/contact",
            json={
                "subject": "Bug report",
                "message": "Found a bug in the app"
            }
        )
        
        assert response.status_code == 200
    
    def test_contact_without_subject(self):
        """Can submit contact without subject."""
        from routers.contact import router
        from core.database import get_db
        
        app = FastAPI()
        
        mock_user = MagicMock()
        mock_user.id = 1
        mock_user.email = "user@example.com"
        
        async def mock_get_db():
            yield AsyncMock()
        
        @app.middleware("http")
        async def add_user(request, call_next):
            request.state.user = mock_user
            return await call_next(request)
        
        app.dependency_overrides[get_db] = mock_get_db
        app.include_router(router)
        client = TestClient(app)
        
        response = client.post(
            "/contact",
            json={"message": "Just wanted to say hello!"}
        )
        
        assert response.status_code == 200


# ============================================================================
# 2. Data Validation Tests
# ============================================================================

class TestContactValidation:
    """Test contact form data validation."""
    
    def test_empty_message_rejected(self):
        """Empty message is rejected."""
        from routers.contact import router
        from core.database import get_db
        
        app = FastAPI()
        
        mock_user = MagicMock()
        mock_user.id = 1
        mock_user.email = "user@example.com"
        
        async def mock_get_db():
            yield AsyncMock()
        
        @app.middleware("http")
        async def add_user(request, call_next):
            request.state.user = mock_user
            return await call_next(request)
        
        app.dependency_overrides[get_db] = mock_get_db
        app.include_router(router)
        client = TestClient(app)
        
        response = client.post("/contact", json={"message": ""})
        
        assert response.status_code == 400
    
    def test_whitespace_only_message_rejected(self):
        """Whitespace-only message is rejected."""
        from routers.contact import router
        from core.database import get_db
        
        app = FastAPI()
        
        mock_user = MagicMock()
        mock_user.id = 1
        mock_user.email = "user@example.com"
        
        async def mock_get_db():
            yield AsyncMock()
        
        @app.middleware("http")
        async def add_user(request, call_next):
            request.state.user = mock_user
            return await call_next(request)
        
        app.dependency_overrides[get_db] = mock_get_db
        app.include_router(router)
        client = TestClient(app)
        
        response = client.post("/contact", json={"message": "   "})
        
        assert response.status_code == 400


# ============================================================================
# 3. Contact Storage Tests
# ============================================================================

class TestContactStorage:
    """Test contact form storage in database."""
    
    @pytest.mark.asyncio
    async def test_contact_stored_in_database(self, db_session):
        """Contact form is stored in database."""
        from core.models import User, Contact
        from sqlalchemy import select
        
        # Create user
        user = User(user_id="usr_store", email="store@example.com")
        db_session.add(user)
        await db_session.commit()
        
        # Create contact
        contact = Contact(
            user_id=user.id,
            email=user.email,
            subject="Test subject",
            message="Test message",
            ip_address="192.168.1.1"
        )
        db_session.add(contact)
        await db_session.commit()
        
        # Verify stored
        result = await db_session.execute(
            select(Contact).where(Contact.user_id == user.id)
        )
        stored = result.scalar_one_or_none()
        
        assert stored is not None
        assert stored.message == "Test message"


if __name__ == "__main__":
    pytest.main([__file__, "-v"])