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/*
 *  Copyright (C) 2010 Ryszard Wiśniewski 
 *  Copyright (C) 2010 Connor Tumbleson 
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.faker.android;

import java.io.*;
import java.nio.charset.StandardCharsets;

import org.antlr.runtime.*;
import org.antlr.runtime.tree.CommonTree;
import org.antlr.runtime.tree.CommonTreeNodeStream;
import org.apache.commons.io.IOUtils;
import org.jf.dexlib2.writer.builder.DexBuilder;
import org.jf.smali.*;

public class SmaliMod {

    public static boolean assembleSmaliFile(String smali, DexBuilder dexBuilder, int apiLevel, boolean verboseErrors,
                                            boolean printTokens, File smaliFile) throws IOException, RuntimeException, RecognitionException {

        InputStream is = new ByteArrayInputStream(smali.getBytes());
        return assembleSmaliFile(is, dexBuilder, apiLevel, verboseErrors, printTokens, smaliFile);
    }

    public static boolean assembleSmaliFile(InputStream is,DexBuilder dexBuilder, int apiLevel, boolean verboseErrors,
                                            boolean printTokens, File smaliFile) throws IOException, RecognitionException {

        // copy our filestream into a tmp file, so we don't overwrite
        File tmp = File.createTempFile("BRUT",".bak");
        tmp.deleteOnExit();

        OutputStream os = new FileOutputStream(tmp);
        IOUtils.copy(is, os);
        os.close();

        return assembleSmaliFile(tmp,dexBuilder, apiLevel, verboseErrors, printTokens);
    }

    public static boolean assembleSmaliFile(File smaliFile,DexBuilder dexBuilder, int apiLevel, boolean verboseErrors,
                                            boolean printTokens) throws IOException, RecognitionException {

        CommonTokenStream tokens;
        smaliFlexLexer lexer;

        InputStream is = new FileInputStream(smaliFile);
        InputStreamReader reader = new InputStreamReader(is, StandardCharsets.UTF_8);

        lexer = new smaliFlexLexer(reader, apiLevel);
        (lexer).setSourceFile(smaliFile);
        tokens = new CommonTokenStream(lexer);

        if (printTokens) {
            tokens.getTokens();

            for (int i=0; i 0 || lexer.getNumberOfSyntaxErrors() > 0) {
            is.close();
            reader.close();
            return false;
        }

        CommonTree t = result.getTree();

        CommonTreeNodeStream treeStream = new CommonTreeNodeStream(t);
        treeStream.setTokenStream(tokens);


        smaliTreeWalker dexGen = new smaliTreeWalker(treeStream);
        dexGen.setApiLevel(apiLevel);
        dexGen.setVerboseErrors(verboseErrors);
        dexGen.setDexBuilder(dexBuilder);
        dexGen.smali_file();

        is.close();
        reader.close();

        return dexGen.getNumberOfSyntaxErrors() == 0;
    }
}