/*

 * Copyright (c) 2012, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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

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 */

package org.openjdk.tests.shapegen;

import java.util.ArrayList;

import java.util.List;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Map;

import java.util.Set;

import static org.openjdk.tests.shapegen.ClassCase.Kind.*;

/**

 *

 * @author Robert Field

 */

public class Hierarchy {

    public final ClassCase root;

    public final Set<ClassCase> all;

    public Hierarchy(ClassCase root) {

        this.root = root;

        root.init(new HashMap<String,Integer>());

        Set<ClassCase> allClasses = new HashSet<>();

        root.collectClasses(allClasses);

        this.all = allClasses;

    }

    public boolean anyDefaults() {

        for (ClassCase cc : all) {

            if (cc.kind == IDEFAULT) {

                return true;

            }

        }

        return false;

    }

    public boolean get_OK() {

        return root.get_OK();

    }

    public String testName() {

        return root + "Test";

    }

    private static void genInterfaceList(StringBuilder buf, String prefix, List<ClassCase> interfaces) {

            if (!interfaces.isEmpty()) {

                buf.append(" ");

                buf.append(prefix);

                buf.append(" ");

                buf.append(interfaces.get(0));

                for (int i = 1; i < interfaces.size(); ++i) {

                    buf.append(", " + interfaces.get(i));

                }

            }

    }

    public static void genClassDef(StringBuilder buf, ClassCase cc, String implClass, List<ClassCase> defaultRef) {

        if (cc.isInterface()) {

            buf.append("interface ");

            buf.append(cc.getName() + " ");

            genInterfaceList(buf, "extends", cc.getInterfaces());

            buf.append(" {\n");

            switch (cc.kind) {

                case IDEFAULT:

                    buf.append("    default String m() { return \"\"; }\n");

                    defaultRef.add(cc);

                    break;

                case IPRESENT:

                    buf.append("    String m();\n");

                    break;

                case IVAC:

                    break;

                default:

                    throw new AssertionError("Unexpected kind");

            }

            buf.append("}\n\n");

        } else {

            buf.append((cc.isAbstract()? "abstract " : ""));

            buf.append(" class " + cc.getName());

            if (cc.getSuperclass() != null) {

                buf.append(" extends " + cc.getSuperclass());

            }

            genInterfaceList(buf, "implements", cc.getInterfaces());

            buf.append(" {\n");

            switch (cc.kind) {

                case CCONCRETE:

                    buf.append("   public String m() { return \"\"; }\n");

                    break;

                case CABSTRACT:

                    buf.append("   public abstract String m();\n");

                    break;

                case CNONE:

                    break;

                default:

                    throw new AssertionError("Unexpected kind");

            }

            buf.append("}\n\n");

        }

    }

    @Override

    public boolean equals(Object obj) {

        return obj instanceof Hierarchy && root.getID().equals(((Hierarchy)obj).root.getID());

    }

    @Override

    public int hashCode() {

        return root.getID().hashCode();

    }

    @Override

    public String toString() {

        return root.getName();

    }

    private static String classNames[] = {

        "C", "D", "E", "F", "G", "H", "S", "T", "U", "V"

    };

    private static String interfaceNames[] = {

        "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R"

    };

    private static int CLASS_INDEX = 0;

    private static int INTERFACE_INDEX = 1;

    private static int NUM_INDICIES = 2;

    public List<String> getDescription() {

        Map<ClassCase,String> nameMap = new HashMap<>();

        assignNames(root, new int[NUM_INDICIES], nameMap);

        ArrayList<String> res = new ArrayList<>();

        if (root.getSupertypes().size() == 0) {

           res.add(nameMap.get(root) + root.kind.getPrefix() + "()");

        } else {

            genCaseDescription(root, res, new HashSet<ClassCase>(), nameMap);

        }

        return res;

    }

    private static void assignNames(

            ClassCase cc, int indices[], Map<ClassCase,String> names) {

        String name = names.get(cc);

        if (name == null) {

            if (cc.isInterface()) {

                names.put(cc, interfaceNames[indices[INTERFACE_INDEX]++]);

            } else {

                names.put(cc, classNames[indices[CLASS_INDEX]++]);

            }

            for (int i = 0; i < cc.getSupertypes().size(); ++i) {

                assignNames(cc.getSupertypes().get(i), indices, names);

            }

        }

    }

    private static void genCaseDescription(

            ClassCase cc, List<String> res, Set<ClassCase> alreadyDone,

            Map<ClassCase,String> nameMap) {

        if (!alreadyDone.contains(cc)) {

            if (cc.getSupertypes().size() > 0) {

                StringBuilder sb = new StringBuilder();

                sb.append(nameMap.get(cc));

                sb.append(cc.kind.getPrefix());

                sb.append("(");

                for (int i = 0; i < cc.getSupertypes().size(); ++i) {

                    ClassCase supertype = cc.getSupertypes().get(i);

                    if (i != 0) {

                        sb.append(",");

                    }

                    genCaseDescription(supertype, res, alreadyDone, nameMap);

                    sb.append(nameMap.get(supertype));

                    sb.append(supertype.kind.getPrefix());

                }

                sb.append(")");

                res.add(sb.toString());

            }

        }

        alreadyDone.add(cc);

    }

}