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

import com.oracle.graal.python.PythonLanguage;
import com.oracle.graal.python.annotations.ArgumentClinic;
import com.oracle.graal.python.builtins.Builtin;
import java.util.List;

import com.oracle.graal.python.builtins.CoreFunctions;
import com.oracle.graal.python.builtins.PythonBuiltins;
import com.oracle.graal.python.builtins.objects.iterator.PSequenceIterator;
import com.oracle.graal.python.builtins.objects.str.TemplateFormatter;
import static com.oracle.graal.python.nodes.BuiltinNames.FORMATTER_FIELD_NAME_SPLIT;
import static com.oracle.graal.python.nodes.BuiltinNames.FORMATTER_PARSER;
import static com.oracle.graal.python.nodes.BuiltinNames._STRING;
import com.oracle.graal.python.nodes.function.PythonBuiltinBaseNode;
import com.oracle.graal.python.nodes.function.builtins.PythonUnaryClinicBuiltinNode;
import com.oracle.graal.python.nodes.function.builtins.clinic.ArgumentClinicProvider;
import com.oracle.graal.python.runtime.ExecutionContext;
import com.oracle.graal.python.runtime.PythonContext;
import com.oracle.graal.python.runtime.object.PythonObjectFactory;
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(defineModule = _STRING)
public class StringModuleBuiltins extends PythonBuiltins {
    @Override
    protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFactories() {
        return StringModuleBuiltinsFactory.getFactories();
    }

    @Builtin(name = FORMATTER_PARSER, minNumOfPositionalArgs = 1, parameterNames = {"self"})
    @ArgumentClinic(name = "self", conversion = ArgumentClinic.ClinicConversion.String)
    @GenerateNodeFactory
    abstract static class FormaterParserNode extends PythonUnaryClinicBuiltinNode {
        @Override
        protected ArgumentClinicProvider getArgumentClinic() {
            return StringModuleBuiltinsClinicProviders.FormaterParserNodeClinicProviderGen.INSTANCE;
        }

        @Specialization
        PSequenceIterator formatterParser(VirtualFrame frame, String self) {
            TemplateFormatter formatter = new TemplateFormatter(self);
            List<Object[]> parserList;
            PythonLanguage language = PythonLanguage.get(this);
            PythonContext context = PythonContext.get(this);
            Object state = ExecutionContext.IndirectCallContext.enter(frame, language, context, this);
            try {
                parserList = formatter.formatterParser(this);
            } finally {
                ExecutionContext.IndirectCallContext.exit(frame, language, context, state);
            }
            return parserListToIterator(parserList, factory());
        }
    }

    private static PSequenceIterator parserListToIterator(List<Object[]> parserList, PythonObjectFactory factory) {
        Object[] tuples = new Object[parserList.size()];
        for (int i = 0; i < tuples.length; i++) {
            tuples[i] = factory.createTuple(parserList.get(i));
        }
        return factory.createSequenceIterator(factory.createList(tuples));
    }

    @Builtin(name = FORMATTER_FIELD_NAME_SPLIT, minNumOfPositionalArgs = 1, parameterNames = {"self"})
    @ArgumentClinic(name = "self", conversion = ArgumentClinic.ClinicConversion.String)
    @GenerateNodeFactory
    abstract static class FormaterFieldNameSplitNode extends PythonUnaryClinicBuiltinNode {
        @Override
        protected ArgumentClinicProvider getArgumentClinic() {
            return StringModuleBuiltinsClinicProviders.FormaterFieldNameSplitNodeClinicProviderGen.INSTANCE;
        }

        @Specialization
        Object formatterParser(VirtualFrame frame, String self) {
            TemplateFormatter formatter = new TemplateFormatter(self);
            TemplateFormatter.FieldNameSplitResult result;
            PythonLanguage language = PythonLanguage.get(this);
            PythonContext context = PythonContext.get(this);
            Object state = ExecutionContext.IndirectCallContext.enter(frame, language, context, this);
            try {
                result = formatter.formatterFieldNameSplit(this);
            } finally {
                ExecutionContext.IndirectCallContext.exit(frame, language, context, state);
            }
            PythonObjectFactory factory = factory();
            return factory.createTuple(new Object[]{result.first, parserListToIterator(result.parserList, factory)});
        }
    }
}
