/*
 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.truffle.sl.nodes.instrument;

import java.io.*;
import java.util.*;

import com.oracle.truffle.api.instrument.*;
import com.oracle.truffle.api.instrument.impl.*;
import com.oracle.truffle.api.nodes.*;
import com.oracle.truffle.api.nodes.NodeUtil.NodeClass;
import com.oracle.truffle.api.nodes.NodeUtil.NodeField;
import com.oracle.truffle.api.nodes.NodeUtil.NodeFieldKind;

/**
 * SLASTPrinter is used to print for SL's internal Truffle AST. This is used by
 * {@link SLDefaultVisualizer} to provide a means of displaying the internal Truffle AST
 */
public final class SLASTPrinter extends DefaultASTPrinter {

    public SLASTPrinter() {
    }

    @Override
    protected void printTree(PrintWriter p, Node node, int maxDepth, Node markNode, int level) {
        if (node == null) {
            p.print("null");
            return;
        }

        p.print(nodeName(node));

        p.print("(");

        if (node instanceof InstrumentationNode) {
            p.print(instrumentInfo((InstrumentationNode) node));
        }

        p.print(sourceInfo(node));

        p.print(NodeUtil.printSyntaxTags(node));

        ArrayList<NodeField> childFields = new ArrayList<>();

        for (NodeField field : NodeClass.get(node.getClass()).getFields()) {
            if (field.getKind() == NodeFieldKind.CHILD || field.getKind() == NodeFieldKind.CHILDREN) {
                childFields.add(field);
            } else if (field.getKind() == NodeFieldKind.DATA) {
                // p.print(sep);
                // sep = ", ";
                //
                // final String fieldName = field.getName();
                // switch (fieldName) {
                //
                // }
                // p.print(fieldName);
                // p.print(" = ");
                // p.print(field.loadValue(node));
            }
        }
        p.print(")");

        if (level <= maxDepth) {

            if (childFields.size() != 0) {
                p.print(" {");
                for (NodeField field : childFields) {

                    Object value = field.loadValue(node);
                    if (value == null) {
                        printNewLine(p, level);
                        p.print(field.getName());
                        p.print(" = null ");
                    } else if (field.getKind() == NodeFieldKind.CHILD) {
                        printChild(p, maxDepth, markNode, level, field, value);
                    } else if (field.getKind() == NodeFieldKind.CHILDREN) {
                        printChildren(p, maxDepth, markNode, level, field, value);
                    } else {
                        printNewLine(p, level);
                        p.print(field.getName());
                    }
                }
                printNewLine(p, level - 1);
                p.print("}");
            }
        }
    }

}