"""
Security Tests for InnSight-AI API
===================================
Tests for RBAC, tenant isolation, rate limiting, input validation, and PII safety.
"""
import pytest
import time
import os


class TestRBAC:
    """Role-Based Access Control tests"""

    def test_admin_endpoint_requires_admin_role(self, client, auth_headers):
        """Test that admin endpoints reject non-admin users"""
        # Regular user trying to access admin endpoint
        response = client.get("/api/admin/users", headers=auth_headers)
        
        # Should be forbidden for non-admin
        assert response.status_code in [401, 403]

    def test_admin_analytics_requires_admin(self, client, auth_headers):
        """Test that analytics endpoints require admin role"""
        response = client.get("/api/admin/analytics", headers=auth_headers)
        
        assert response.status_code in [401, 403, 404]  # 404 if endpoint doesn't exist

    def test_admin_can_list_users(self, client, admin_auth_headers):
        """Test that admin can list users"""
        response = client.get("/api/admin/users", headers=admin_auth_headers)
        
        # Admin should have access (or 404 if not implemented)
        assert response.status_code in [200, 404]

    def test_regular_user_cannot_create_admin(self, client, auth_headers):
        """Test that regular users cannot create admin accounts"""
        response = client.post("/api/admin/users", json={
            "email": "newadmin@test.com",
            "full_name": "New Admin",
            "is_admin": True
        }, headers=auth_headers)
        
        assert response.status_code in [401, 403]

    def test_unauthenticated_cannot_access_protected_routes(self, client):
        """Test that unauthenticated requests are rejected"""
        protected_routes = [
            ("GET", "/api/auth/me"),
            ("GET", "/api/hotels"),
            ("POST", "/api/export"),
            ("GET", "/api/comparisons"),
        ]
        
        for method, route in protected_routes:
            if method == "GET":
                response = client.get(route)
            else:
                response = client.post(route, json={})
            
            # Should require authentication
            assert response.status_code in [401, 403, 405], f"Route {route} should require auth"


class TestTenantIsolation:
    """Tenant isolation tests - users can only see their own data"""

    def test_user_cannot_see_other_users_data(self, client, auth_headers):
        """Test that users cannot access data from other users"""
        # Try to access another user's hotels
        response = client.get("/api/hotels?user_id=999", headers=auth_headers)
        
        # Should not return other user's data
        if response.status_code == 200:
            data = response.json()
            # Data should be filtered to current user
            # (exact validation depends on implementation)

    def test_user_cannot_export_other_users_comparisons(self, client, auth_headers):
        """Test that users cannot export other users' comparison data"""
        response = client.post("/api/export", json={
            "format": "excel",
            "comparison_id": 999,  # Non-existent or other user's comparison
            "user_id": 999  # Attempt to specify other user
        }, headers=auth_headers)
        
        # Should not allow export of other user's data
        assert response.status_code in [400, 403, 404, 422]


class TestRateLimiting:
    """Rate limiting tests for sensitive endpoints"""

    @pytest.mark.slow
    def test_scrape_endpoint_is_rate_limited(self, client, auth_headers):
        """Test that scraping endpoint has rate limits"""
        # Make multiple rapid requests
        responses = []
        for _ in range(20):
            response = client.post("/api/scrape", json={
                "url": "https://example.com/hotel"
            }, headers=auth_headers)
            responses.append(response.status_code)
            time.sleep(0.05)  # Small delay
        
        # At some point should hit rate limit (429)
        # Or endpoint might not exist (404) or require different params (422)
        # This test documents behavior
        
    @pytest.mark.slow
    def test_export_endpoint_is_rate_limited(self, client, auth_headers):
        """Test that export endpoint has rate limits"""
        responses = []
        for _ in range(15):
            response = client.post("/api/export", json={
                "format": "excel",
                "data": [{"hotel": "test", "price": 100}]
            }, headers=auth_headers)
            responses.append(response.status_code)
            time.sleep(0.1)
        
        # Should eventually hit rate limit or succeed
        # Rate limits may be disabled in test mode

    def test_login_has_brute_force_protection(self, client):
        """Test that login endpoint has brute force protection"""
        # Make multiple failed login attempts
        for i in range(10):
            response = client.post("/api/auth/login", json={
                "email": "test@example.com",
                "password": f"wrongpassword{i}"
            })
        
        # Should either rate limit or continue to reject
        # Implementation may vary


class TestInputValidation:
    """Input validation and injection prevention tests"""

    def test_sql_injection_in_email(self, client):
        """Test that SQL injection in email is handled safely"""
        malicious_emails = [
            "test@example.com'; DROP TABLE users; --",
            "' OR '1'='1",
            "admin'--@example.com",
        ]
        
        for email in malicious_emails:
            response = client.post("/api/auth/login", json={
                "email": email,
                "password": "testpassword"
            })
            # Should not crash and should reject invalid input
            assert response.status_code != 500

    def test_xss_in_user_name(self, client):
        """Test that XSS in user name is sanitized"""
        import uuid
        unique_email = f"xss_test_{uuid.uuid4().hex[:8]}@test.com"
        
        response = client.post("/api/auth/register", json={
            "email": unique_email,
            "password": "SecurePass123!",
            "full_name": "<script>alert('xss')</script>"
        })
        
        if response.status_code == 200:
            user = response.json().get("user", {})
            # Name should not contain raw script tags
            assert "<script>" not in user.get("full_name", "")

    def test_path_traversal_in_export_download(self, client, auth_headers):
        """Test that path traversal in file downloads is blocked"""
        malicious_paths = [
            "../../../etc/passwd",
            "..\\..\\..\\windows\\system32\\config\\sam",
            "/etc/passwd",
            "....//....//....//etc/passwd",
        ]
        
        for path in malicious_paths:
            response = client.get(f"/api/export/download/{path}", headers=auth_headers)
            assert response.status_code in [400, 404, 422]

    def test_oversized_payload_rejected(self, client, auth_headers):
        """Test that extremely large payloads are rejected"""
        # Create a 10MB payload
        large_data = [{"hotel": f"Hotel {i}", "price": 100} for i in range(100000)]
        
        response = client.post("/api/export", json={
            "format": "excel",
            "data": large_data
        }, headers=auth_headers)
        
        # Should reject or handle gracefully
        assert response.status_code in [200, 400, 413, 422]

    def test_special_characters_in_hotel_name(self, client, auth_headers):
        """Test that special characters are handled safely"""
        response = client.post("/api/hotels", json={
            "name": "מלון ישראלי 🏨 with \"quotes\" and <brackets>",
            "booking_url": "https://example.com",
        }, headers=auth_headers)
        
        # Should not crash
        assert response.status_code != 500


class TestPIISafety:
    """Tests for PII (Personally Identifiable Information) handling"""

    def test_password_not_returned_in_user_response(self, client, auth_headers):
        """Test that password hash is never returned in API responses"""
        response = client.get("/api/auth/me", headers=auth_headers)
        
        if response.status_code == 200:
            user = response.json()
            assert "password" not in user
            assert "password_hash" not in user

    def test_totp_secret_not_exposed(self, client, auth_headers):
        """Test that TOTP secrets are never returned in API responses"""
        response = client.get("/api/auth/me", headers=auth_headers)
        
        if response.status_code == 200:
            user = response.json()
            assert "totp_secret" not in user

    def test_admin_user_list_excludes_sensitive_data(self, client, admin_auth_headers):
        """Test that admin user list doesn't include passwords or secrets"""
        response = client.get("/api/admin/users", headers=admin_auth_headers)
        
        if response.status_code == 200:
            data = response.json()
            users = data.get("users", data if isinstance(data, list) else [])
            
            for user in users:
                assert "password" not in user
                assert "password_hash" not in user
                assert "totp_secret" not in user

    def test_export_does_not_include_pii(self, client, auth_headers):
        """Test that exports don't include other users' PII"""
        response = client.post("/api/export", json={
            "format": "excel",
            "data": [{"hotel": "Test", "price": 100}]
        }, headers=auth_headers)
        
        if response.status_code == 200:
            # Check response content doesn't include PII
            content = response.content.decode('utf-8', errors='ignore')
            assert "password" not in content.lower()
            assert "totp" not in content.lower()


# Additional fixtures for admin auth
@pytest.fixture
def admin_auth_headers(client):
    """Get authentication headers for admin user"""
    # For testing, we need to mock admin login
    # In real tests, this would use actual admin credentials with 2FA bypass
    
    # Try to login as admin (this will fail without proper 2FA)
    # Return mock headers for testing purposes
    return {"Authorization": "Bearer mock_admin_token_for_testing"}