// -*- mode:c++; tab-width:2; indent-tabs-mode:nil; c-basic-offset:2 -*-
#ifndef __UPC_EAN_READER_H__
#define __UPC_EAN_READER_H__

/*
 *  Copyright 2010 ZXing authors All rights reserved.
 *
 * 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.
 */

#include <zxing/oned/OneDReader.h>
#include <zxing/common/BitArray.h>
#include <zxing/Result.h>

namespace zxing {
    namespace oned {

        class UPCEANReader : public OneDReader {
        private:
            std::string decodeRowStringBuffer;
            // UPCEANExtensionSupport extensionReader;
            // EANManufacturerOrgSupport eanManSupport;

            static const int MAX_AVG_VARIANCE;
            static const int MAX_INDIVIDUAL_VARIANCE;

            static Range findStartGuardPattern(Ref<BitArray> row);

            virtual Range decodeEnd(Ref<BitArray> row, int endStart);

            static bool checkStandardUPCEANChecksum(Ref<String> const& s);

            static Range findGuardPattern(Ref<BitArray> row,
                int rowOffset,
                bool whiteFirst,
                std::vector<int> const& pattern,
                std::vector<int>& counters);


        protected:
            static const std::vector<int> START_END_PATTERN;
            static const std::vector<int> MIDDLE_PATTERN;

            static const std::vector<int const*> L_PATTERNS;
            static const std::vector<int const*> L_AND_G_PATTERNS;

            static Range findGuardPattern(Ref<BitArray> row,
                int rowOffset,
                bool whiteFirst,
                std::vector<int> const& pattern);

        public:
            UPCEANReader();

            virtual int decodeMiddle(Ref<BitArray> row,
                Range const& startRange,
                std::string& resultString) = 0;

            virtual Ref<Result> decodeRow(int rowNumber, Ref<BitArray> row);
            virtual Ref<Result> decodeRow(int rowNumber, Ref<BitArray> row, Range const& range);

            static int decodeDigit(Ref<BitArray> row,
                std::vector<int>& counters,
                int rowOffset,
                std::vector<int const*> const& patterns);

            virtual bool checkChecksum(Ref<String> const& s);

            virtual BarcodeFormat getBarcodeFormat() = 0;
            virtual ~UPCEANReader();

            friend class MultiFormatUPCEANReader;
        };

    }
}

#endif