import sys
import json
try:
    import sympy
except ImportError:
    sympy = None

def analyze_scientific(expression, module):
    if module == "sympy":
        if not sympy:
            return {"error": "Sympy not installed on host."}
        try:
            # Basic symbolic manipulation logic
            x = sympy.symbols('x')
            expr = sympy.sympify(expression)
            simplified = sympy.simplify(expr)
            derivative = sympy.diff(expr, x)
            return {
                "original": expression,
                "simplified": str(simplified),
                "derivative_wrt_x": str(derivative),
                "message": "Symbolic analysis complete."
            }
        except Exception as e:
            return {"error": f"Sympy error: {str(e)}"}
    elif module == "rdkit":
        # Placeholder for RDKit logic
        return {"message": "RDKit analysis requires specialized chemistry environment.", "module": "rdkit"}
    return {"error": "Unknown module"}

if __name__ == "__main__":
    if len(sys.argv) < 3:
        print(json.dumps({"error": "Missing arguments"}))
        sys.exit(1)
    
    expr = sys.argv[1]
    mod = sys.argv[2]
    print(json.dumps(analyze_scientific(expr, mod)))