/*
 * Copyright 2012, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.jf.dexlib2.util;

import android.support.annotation.NonNull;
import android.support.annotation.Nullable;

import org.jf.dexlib2.iface.reference.FieldReference;
import org.jf.dexlib2.iface.reference.MethodProtoReference;
import org.jf.dexlib2.iface.reference.MethodReference;
import org.jf.dexlib2.iface.reference.Reference;
import org.jf.dexlib2.iface.reference.StringReference;
import org.jf.dexlib2.iface.reference.TypeReference;
import org.jf.util.StringUtils;

import java.io.IOException;
import java.io.Writer;

public final class ReferenceUtil {
    public static String getMethodDescriptor(MethodReference methodReference) {
        return getMethodDescriptor(methodReference, false);
    }

    public static String getMethodDescriptor(MethodReference methodReference, boolean useImplicitReference) {
        StringBuilder sb = new StringBuilder();
        if (!useImplicitReference) {
            sb.append(methodReference.getDefiningClass());
            sb.append("->");
        }
        sb.append(methodReference.getName());
        sb.append('(');
        for (CharSequence paramType : methodReference.getParameterTypes()) {
            sb.append(paramType);
        }
        sb.append(')');
        sb.append(methodReference.getReturnType());
        return sb.toString();
    }

    public static String getMethodProtoDescriptor(MethodProtoReference methodProtoReference) {
        StringBuilder sb = new StringBuilder();
        sb.append('(');
        for (CharSequence paramType : methodProtoReference.getParameterTypes()) {
            sb.append(paramType);
        }
        sb.append(')');
        sb.append(methodProtoReference.getReturnType());
        return sb.toString();
    }

    public static void writeMethodDescriptor(Writer writer, MethodReference methodReference) throws IOException {
        writeMethodDescriptor(writer, methodReference, false);
    }

    public static void writeMethodDescriptor(Writer writer, MethodReference methodReference,
                                             boolean useImplicitReference) throws IOException {
        if (!useImplicitReference) {
            writer.write(methodReference.getDefiningClass());
            writer.write("->");
        }
        writer.write(methodReference.getName());
        writer.write('(');
        for (CharSequence paramType : methodReference.getParameterTypes()) {
            writer.write(paramType.toString());
        }
        writer.write(')');
        writer.write(methodReference.getReturnType());
    }

    public static String getFieldDescriptor(FieldReference fieldReference) {
        return getFieldDescriptor(fieldReference, false);
    }

    public static String getFieldDescriptor(FieldReference fieldReference, boolean useImplicitReference) {
        StringBuilder sb = new StringBuilder();
        if (!useImplicitReference) {
            sb.append(fieldReference.getDefiningClass());
            sb.append("->");
        }
        sb.append(fieldReference.getName());
        sb.append(':');
        sb.append(fieldReference.getType());
        return sb.toString();
    }

    public static String getShortFieldDescriptor(FieldReference fieldReference) {
        StringBuilder sb = new StringBuilder();
        sb.append(fieldReference.getName());
        sb.append(':');
        sb.append(fieldReference.getType());
        return sb.toString();
    }

    public static void writeFieldDescriptor(Writer writer, FieldReference fieldReference) throws IOException {
        writeFieldDescriptor(writer, fieldReference, false);
    }

    public static void writeFieldDescriptor(Writer writer, FieldReference fieldReference,
                                            boolean implicitReference) throws IOException {
        if (!implicitReference) {
            writer.write(fieldReference.getDefiningClass());
            writer.write("->");
        }
        writer.write(fieldReference.getName());
        writer.write(':');
        writer.write(fieldReference.getType());
    }

    @Nullable
    public static String getReferenceString(@NonNull Reference reference) {
        return getReferenceString(reference, null);
    }

    @Nullable
    public static String getReferenceString(@NonNull Reference reference, @Nullable String containingClass) {
        if (reference instanceof StringReference) {
            return String.format("\"%s\"", StringUtils.escapeString(((StringReference) reference).getString()));
        }
        if (reference instanceof TypeReference) {
            return ((TypeReference) reference).getType();
        }
        if (reference instanceof FieldReference) {
            FieldReference fieldReference = (FieldReference) reference;
            boolean useImplicitReference = fieldReference.getDefiningClass().equals(containingClass);
            return getFieldDescriptor(fieldReference, useImplicitReference);
        }
        if (reference instanceof MethodReference) {
            MethodReference methodReference = (MethodReference) reference;
            boolean useImplicitReference = methodReference.getDefiningClass().equals(containingClass);
            return getMethodDescriptor(methodReference, useImplicitReference);
        }
        if (reference instanceof MethodProtoReference) {
            MethodProtoReference methodProtoReference = (MethodProtoReference) reference;
            return getMethodProtoDescriptor(methodProtoReference);
        }
        return null;
    }

    private ReferenceUtil() {
    }
}
