"""
Code Execution Security Tests

Tests for TypeScript code execution security, including
sandbox escape attempts, resource limits, and credential protection.

Test Coverage:
- TC-3.1: Sandbox Security
- TC-3.2: Code Execution Audit
"""

import pytest
import os
import tempfile
import time
from pathlib import Path
from unittest.mock import Mock, patch, MagicMock


class TestSandboxSecurity:
    """Test code execution sandboxing and isolation."""
    
    @pytest.mark.skip(reason="Sandboxing not yet fully implemented")
    def test_file_system_access_restriction(self):
        """TC-3.1.1: Attempt file system access outside temp directory."""
        # Test code that tries to read /etc/passwd
        malicious_code = """
        import * as fs from 'fs';
        const data = fs.readFileSync('/etc/passwd', 'utf8');
        console.log(data);
        """
        
        # Execute and verify access denied
        # This would use the execute_typescript tool
        # Expected: Access denied or error
    
    @pytest.mark.skip(reason="Network restrictions not yet implemented")
    def test_network_access_restriction(self):
        """TC-3.1.2: Attempt network access to unauthorized hosts."""
        # Test code that tries to connect to external IP
        malicious_code = """
        import https from 'https';
        https.get('https://evil.com', (res) => {
            console.log('Connected!');
        });
        """
        
        # Execute and verify network access blocked
        # Expected: Connection refused or timeout
    
    @pytest.mark.skip(reason="Credential protection needs enhancement")
    def test_credential_theft_prevention(self):
        """TC-3.1.3: Attempt credential theft."""
        # Test code that tries to access environment variables
        malicious_code = """
        const token = process.env.CANVAS_API_TOKEN;
        console.log('Token:', token);
        """
        
        # Execute and verify credentials not accessible
        # Expected: Undefined or access denied
    
    def test_resource_exhaustion_timeout(self):
        """TC-3.1.4: Test timeout protection for infinite loops."""
        # Test code with infinite loop
        infinite_loop_code = """
        while (true) {
            // Infinite loop
        }
        """
        
        # Execute with timeout
        # Expected: Timeout after configured limit (120s default)
        # Verify process is terminated
    
    @pytest.mark.skip(reason="Memory limits not yet implemented")
    def test_memory_exhaustion_protection(self):
        """TC-3.1.4: Test memory limit enforcement."""
        # Test code that allocates excessive memory
        memory_bomb_code = """
        const arr = [];
        while (true) {
            arr.push(new Array(1000000).fill('x'));
        }
        """
        
        # Execute and verify memory limit enforced
        # Expected: Out of memory error or process killed
    
    @pytest.mark.skip(reason="Command execution protection needed")
    def test_shell_execution_blocked(self):
        """TC-3.1.5: Test that shell commands are blocked."""
        # Test code that tries to spawn shell
        shell_code = """
        import { exec } from 'child_process';
        exec('ls -la /', (error, stdout, stderr) => {
            console.log(stdout);
        });
        """
        
        # Execute and verify shell execution blocked
        # Expected: Permission denied or execution blocked
    
    def test_temporary_file_cleanup(self):
        """TC-3.1.6: Verify temporary files are cleaned up."""
        # Test that temporary files created during execution are deleted
        # This is mentioned as implemented in the docs
        
        # Create test directory
        temp_dir = tempfile.mkdtemp()
        temp_file = Path(temp_dir) / "test.ts"
        
        # Simulate code execution file
        temp_file.write_text("console.log('test');")
        
        # Verify file is deleted after execution
        # In real implementation, this would be done by execute_typescript
        assert temp_file.exists()  # Before cleanup
        
        # Simulate cleanup
        temp_file.unlink()
        assert not temp_file.exists()  # After cleanup


class TestCodeExecutionAudit:
    """Test code execution audit logging."""
    
    @pytest.mark.skip(reason="Code execution logging not yet implemented")
    def test_code_execution_logged(self):
        """TC-3.2.1: Verify code execution is logged."""
        # Test that code execution creates audit log entry
        # Log should contain: timestamp, code hash, user, result
        pass
    
    @pytest.mark.skip(reason="Code execution logging not yet implemented")
    def test_code_execution_errors_logged(self):
        """TC-3.2.2: Verify code execution errors are logged."""
        # Test that failed executions are logged
        pass
    
    @pytest.mark.skip(reason="Code execution logging not yet implemented")
    def test_sensitive_output_sanitized(self):
        """TC-3.2.3: Verify sensitive data in output is sanitized."""
        # Test that PII or credentials in execution output are masked
        pass


class TestCodeExecutionConfiguration:
    """Test code execution configuration and limits."""
    
    def test_timeout_configurable(self):
        """Verify code execution timeout is configurable."""
        # Check that timeout can be configured
        # Default is 120 seconds as per docs
        default_timeout = 120
        
        # Verify default timeout
        # Implementation depends on how timeout is configured
    
    @pytest.mark.skip(reason="Resource limits not yet configurable")
    def test_resource_limits_configurable(self):
        """Verify resource limits can be configured."""
        # Test that memory, CPU limits can be configured
        pass


class TestMaliciousCodeDetection:
    """Test detection of malicious code patterns."""
    
    @pytest.mark.skip(reason="Static code analysis not yet implemented")
    def test_dangerous_imports_detected(self):
        """Test detection of dangerous imports."""
        # Code with dangerous imports like child_process, fs, net
        dangerous_code = """
        import { exec } from 'child_process';
        import * as fs from 'fs';
        """
        
        # Verify dangerous imports are detected/blocked
    
    @pytest.mark.skip(reason="Static code analysis not yet implemented")
    def test_obfuscated_code_detected(self):
        """Test detection of obfuscated code."""
        # Heavily obfuscated code
        obfuscated_code = """
        eval(atob('Y29uc29sZS5sb2coJ21hbGljaW91cycpOw=='));
        """
        
        # Verify obfuscation is detected


class TestCodeExecutionIsolation:
    """Test execution environment isolation."""
    
    def test_execution_in_temp_directory(self):
        """Verify code executes in temporary directory."""
        # Test that execution happens in isolated temp directory
        # Not in project directory or user home
        pass
    
    @pytest.mark.skip(reason="Environment isolation needs verification")
    def test_limited_environment_variables(self):
        """Test that only necessary environment variables are passed."""
        # Verify minimal environment exposure
        # Only CANVAS_API_TOKEN and required vars should be available
        pass


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