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package com.oracle.graal.python.builtins.modules.cext;

import static com.oracle.graal.python.builtins.PythonBuiltinClassType.SystemError;
import static com.oracle.graal.python.nodes.BuiltinNames.T_COMPILE;
import static com.oracle.graal.python.nodes.BuiltinNames.T_EXEC;
import static com.oracle.graal.python.nodes.ErrorMessages.BAD_ARG_TO_INTERNAL_FUNC;
import static com.oracle.graal.python.nodes.PGuards.isDict;
import static com.oracle.graal.python.nodes.PGuards.isString;
import static com.oracle.graal.python.builtins.PythonBuiltinClassType.TypeError;
import static com.oracle.graal.python.nodes.ErrorMessages.P_OBJ_DOES_NOT_SUPPORT_ITEM_ASSIGMENT;

import com.oracle.graal.python.builtins.Builtin;
import java.util.List;
import com.oracle.graal.python.builtins.CoreFunctions;
import com.oracle.graal.python.builtins.Python3Core;
import com.oracle.graal.python.builtins.PythonBuiltins;
import com.oracle.graal.python.builtins.objects.cext.capi.CExtNodes.PRaiseNativeNode;
import com.oracle.graal.python.builtins.objects.cext.capi.CExtNodes.TransformExceptionToNativeNode;
import com.oracle.graal.python.builtins.objects.module.PythonModule;
import com.oracle.graal.python.lib.PyMappingCheckNode;
import com.oracle.graal.python.lib.PyObjectLookupAttr;
import com.oracle.graal.python.nodes.call.CallNode;
import com.oracle.graal.python.nodes.function.PythonBuiltinBaseNode;
import com.oracle.graal.python.nodes.function.builtins.PythonQuaternaryBuiltinNode;
import com.oracle.graal.python.runtime.exception.PException;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.GenerateNodeFactory;
import com.oracle.truffle.api.dsl.NodeFactory;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.VirtualFrame;

@CoreFunctions(extendsModule = PythonCextBuiltins.PYTHON_CEXT)
@GenerateNodeFactory
public final class PythonCextPythonRunBuiltins extends PythonBuiltins {

    @Override
    protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFactories() {
        return PythonCextPythonRunBuiltinsFactory.getFactories();
    }

    @Override
    public void initialize(Python3Core core) {
        super.initialize(core);
    }

    @Builtin(name = "PyRun_String", minNumOfPositionalArgs = 4)
    @GenerateNodeFactory
    public abstract static class PyRunStringNode extends PythonQuaternaryBuiltinNode {

        @Specialization(guards = "checkArgs(source, globals, locals, isMapping)")
        public Object run(VirtualFrame frame, Object source, Object stype, Object globals, Object locals,
                        @SuppressWarnings("unused") @Cached PyMappingCheckNode isMapping,
                        @Cached PyObjectLookupAttr lookupNode,
                        @Cached CallNode callNode,
                        @Cached TransformExceptionToNativeNode transformExceptionToNativeNode) {
            try {
                PythonModule builtins = getCore().getBuiltins();
                Object compileCallable = lookupNode.execute(frame, builtins, T_COMPILE);
                Object code = callNode.execute(frame, compileCallable, source, stype, stype);
                Object execCallable = lookupNode.execute(frame, builtins, T_EXEC);
                return callNode.execute(frame, execCallable, code, globals, locals);
            } catch (PException e) {
                transformExceptionToNativeNode.execute(e);
                return getContext().getNativeNull();
            }
        }

        @Specialization(guards = "!isString(source) || !isDict(globals)")
        public Object run(VirtualFrame frame, @SuppressWarnings("unused") Object source, @SuppressWarnings("unused") Object stype, @SuppressWarnings("unused") Object globals,
                        @SuppressWarnings("unused") Object locals,
                        @Cached PRaiseNativeNode raiseNativeNode) {
            return raiseNativeNode.raise(frame, getContext().getNativeNull(), SystemError, BAD_ARG_TO_INTERNAL_FUNC);
        }

        @Specialization(guards = {"isString(source)", "isDict(globals)", "!isMapping.execute(locals)"})
        public Object run(VirtualFrame frame, @SuppressWarnings("unused") Object source, @SuppressWarnings("unused") Object stype, @SuppressWarnings("unused") Object globals, Object locals,
                        @SuppressWarnings("unused") @Cached PyMappingCheckNode isMapping,
                        @Cached PRaiseNativeNode raiseNativeNode) {
            return raiseNativeNode.raise(frame, getContext().getNativeNull(), TypeError, P_OBJ_DOES_NOT_SUPPORT_ITEM_ASSIGMENT, locals);
        }

        protected boolean checkArgs(Object source, Object globals, Object locals, PyMappingCheckNode isMapping) {
            return isString(source) && isDict(globals) && isMapping.execute(locals);
        }
    }
}
