// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
// Original code is licensed as follows:
/*
 * Copyright 2013 ZXing authors
 *
 * 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 "core/fxcrt/include/fx_basic.h"
#include "xfa/fxbarcode/BC_ResultPoint.h"
#include "xfa/fxbarcode/pdf417/BC_PDF417BarcodeMetadata.h"
#include "xfa/fxbarcode/pdf417/BC_PDF417BarcodeValue.h"
#include "xfa/fxbarcode/pdf417/BC_PDF417BoundingBox.h"
#include "xfa/fxbarcode/pdf417/BC_PDF417Codeword.h"
#include "xfa/fxbarcode/pdf417/BC_PDF417Common.h"
#include "xfa/fxbarcode/pdf417/BC_PDF417DetectionResultColumn.h"
#include "xfa/fxbarcode/pdf417/BC_PDF417DetectionResultRowIndicatorColumn.h"
#include "xfa/fxbarcode/utils.h"

CBC_DetectionResultRowIndicatorColumn::CBC_DetectionResultRowIndicatorColumn(
    CBC_BoundingBox* boundingBox,
    FX_BOOL isLeft)
    : CBC_DetectionResultColumn(boundingBox) {
  m_isLeft = isLeft;
}
CBC_DetectionResultRowIndicatorColumn::
    ~CBC_DetectionResultRowIndicatorColumn() {}
void CBC_DetectionResultRowIndicatorColumn::setRowNumbers() {
  for (int32_t i = 0; i < m_codewords->GetSize(); i++) {
    CBC_Codeword* codeword = m_codewords->GetAt(i);
    if (codeword) {
      codeword->setRowNumberAsRowIndicatorColumn();
    }
  }
}
int32_t
CBC_DetectionResultRowIndicatorColumn::adjustCompleteIndicatorColumnRowNumbers(
    CBC_BarcodeMetadata barcodeMetadata) {
  CFX_ArrayTemplate<CBC_Codeword*>* codewords = getCodewords();
  setRowNumbers();
  removeIncorrectCodewords(codewords, barcodeMetadata);
  CBC_BoundingBox* boundingBox = getBoundingBox();
  CBC_ResultPoint* top =
      m_isLeft ? boundingBox->getTopLeft() : boundingBox->getTopRight();
  CBC_ResultPoint* bottom =
      m_isLeft ? boundingBox->getBottomLeft() : boundingBox->getBottomRight();
  int32_t firstRow = imageRowToCodewordIndex((int32_t)top->GetY());
  int32_t lastRow = imageRowToCodewordIndex((int32_t)bottom->GetY());
  FX_FLOAT averageRowHeight =
      (lastRow - firstRow) / (FX_FLOAT)barcodeMetadata.getRowCount();
  int32_t barcodeRow = -1;
  int32_t maxRowHeight = 1;
  int32_t currentRowHeight = 0;
  for (int32_t codewordsRow = firstRow; codewordsRow < lastRow;
       codewordsRow++) {
    if (!codewords->GetAt(codewordsRow))
      continue;

    CBC_Codeword* codeword = codewords->GetAt(codewordsRow);
    int32_t rowDifference = codeword->getRowNumber() - barcodeRow;
    if (rowDifference == 0) {
      currentRowHeight++;
    } else if (rowDifference == 1) {
      maxRowHeight =
          maxRowHeight > currentRowHeight ? maxRowHeight : currentRowHeight;
      currentRowHeight = 1;
      barcodeRow = codeword->getRowNumber();
    } else if (rowDifference < 0) {
      codewords->SetAt(codewordsRow, nullptr);
    } else if (codeword->getRowNumber() >= barcodeMetadata.getRowCount()) {
      codewords->SetAt(codewordsRow, nullptr);
    } else if (rowDifference > codewordsRow) {
      codewords->SetAt(codewordsRow, nullptr);
    } else {
      int32_t checkedRows;
      if (maxRowHeight > 2) {
        checkedRows = (maxRowHeight - 2) * rowDifference;
      } else {
        checkedRows = rowDifference;
      }
      FX_BOOL closePreviousCodewordFound = checkedRows >= codewordsRow;
      for (int32_t i = 1; i <= checkedRows && !closePreviousCodewordFound;
           i++) {
        closePreviousCodewordFound = !!codewords->GetAt(codewordsRow - i);
      }
      if (closePreviousCodewordFound) {
        codewords->SetAt(codewordsRow, nullptr);
      } else {
        barcodeRow = codeword->getRowNumber();
        currentRowHeight = 1;
      }
    }
  }
  return (int32_t)(averageRowHeight + 0.5);
}
CFX_Int32Array* CBC_DetectionResultRowIndicatorColumn::getRowHeights(
    int32_t& e) {
  CBC_BarcodeMetadata* barcodeMetadata = getBarcodeMetadata();
  if (!barcodeMetadata) {
    e = BCExceptionCannotMetadata;
    return nullptr;
  }
  adjustIncompleteIndicatorColumnRowNumbers(*barcodeMetadata);
  CFX_Int32Array* result = new CFX_Int32Array;
  result->SetSize(barcodeMetadata->getRowCount());
  for (int32_t i = 0; i < getCodewords()->GetSize(); i++) {
    CBC_Codeword* codeword = getCodewords()->GetAt(i);
    if (codeword) {
      result->SetAt(codeword->getRowNumber(),
                    result->GetAt(codeword->getRowNumber()) + 1);
    }
  }
  return result;
}
int32_t CBC_DetectionResultRowIndicatorColumn::
    adjustIncompleteIndicatorColumnRowNumbers(
        CBC_BarcodeMetadata barcodeMetadata) {
  CBC_BoundingBox* boundingBox = getBoundingBox();
  CBC_ResultPoint* top =
      m_isLeft ? boundingBox->getTopLeft() : boundingBox->getTopRight();
  CBC_ResultPoint* bottom =
      m_isLeft ? boundingBox->getBottomLeft() : boundingBox->getBottomRight();
  int32_t firstRow = imageRowToCodewordIndex((int32_t)top->GetY());
  int32_t lastRow = imageRowToCodewordIndex((int32_t)bottom->GetY());
  FX_FLOAT averageRowHeight =
      (lastRow - firstRow) / (FX_FLOAT)barcodeMetadata.getRowCount();
  CFX_ArrayTemplate<CBC_Codeword*>* codewords = getCodewords();
  int32_t barcodeRow = -1;
  int32_t maxRowHeight = 1;
  int32_t currentRowHeight = 0;
  for (int32_t codewordsRow = firstRow; codewordsRow < lastRow;
       codewordsRow++) {
    if (!codewords->GetAt(codewordsRow))
      continue;

    CBC_Codeword* codeword = codewords->GetAt(codewordsRow);
    codeword->setRowNumberAsRowIndicatorColumn();
    int32_t rowDifference = codeword->getRowNumber() - barcodeRow;
    if (rowDifference == 0) {
      currentRowHeight++;
    } else if (rowDifference == 1) {
      maxRowHeight =
          maxRowHeight > currentRowHeight ? maxRowHeight : currentRowHeight;
      currentRowHeight = 1;
      barcodeRow = codeword->getRowNumber();
    } else if (codeword->getRowNumber() >= barcodeMetadata.getRowCount()) {
      codewords->SetAt(codewordsRow, nullptr);
    } else {
      barcodeRow = codeword->getRowNumber();
      currentRowHeight = 1;
    }
  }
  return (int32_t)(averageRowHeight + 0.5);
}
CBC_BarcodeMetadata*
CBC_DetectionResultRowIndicatorColumn::getBarcodeMetadata() {
  CFX_ArrayTemplate<CBC_Codeword*>* codewords = getCodewords();
  CBC_BarcodeValue barcodeColumnCount;
  CBC_BarcodeValue barcodeRowCountUpperPart;
  CBC_BarcodeValue barcodeRowCountLowerPart;
  CBC_BarcodeValue barcodeECLevel;
  for (int32_t i = 0; i < codewords->GetSize(); i++) {
    CBC_Codeword* codeword = codewords->GetAt(i);
    if (!codeword)
      continue;

    codeword->setRowNumberAsRowIndicatorColumn();
    int32_t rowIndicatorValue = codeword->getValue() % 30;
    int32_t codewordRowNumber = codeword->getRowNumber();
    if (!m_isLeft) {
      codewordRowNumber += 2;
    }
    switch (codewordRowNumber % 3) {
      case 0:
        barcodeRowCountUpperPart.setValue(rowIndicatorValue * 3 + 1);
        break;
      case 1:
        barcodeECLevel.setValue(rowIndicatorValue / 3);
        barcodeRowCountLowerPart.setValue(rowIndicatorValue % 3);
        break;
      case 2:
        barcodeColumnCount.setValue(rowIndicatorValue + 1);
        break;
    }
  }
  if ((barcodeColumnCount.getValue()->GetSize() == 0) ||
      (barcodeRowCountUpperPart.getValue()->GetSize() == 0) ||
      (barcodeRowCountLowerPart.getValue()->GetSize() == 0) ||
      (barcodeECLevel.getValue()->GetSize() == 0) ||
      barcodeColumnCount.getValue()->GetAt(0) < 1 ||
      barcodeRowCountUpperPart.getValue()->GetAt(0) +
              barcodeRowCountLowerPart.getValue()->GetAt(0) <
          CBC_PDF417Common::MIN_ROWS_IN_BARCODE ||
      barcodeRowCountUpperPart.getValue()->GetAt(0) +
              barcodeRowCountLowerPart.getValue()->GetAt(0) >
          CBC_PDF417Common::MAX_ROWS_IN_BARCODE) {
    return nullptr;
  }
  CBC_BarcodeMetadata* barcodeMetadata =
      new CBC_BarcodeMetadata(barcodeColumnCount.getValue()->GetAt(0),
                              barcodeRowCountUpperPart.getValue()->GetAt(0),
                              barcodeRowCountLowerPart.getValue()->GetAt(0),
                              barcodeECLevel.getValue()->GetAt(0));
  removeIncorrectCodewords(codewords, *barcodeMetadata);
  return barcodeMetadata;
}
FX_BOOL CBC_DetectionResultRowIndicatorColumn::isLeft() {
  return m_isLeft;
}
CFX_ByteString CBC_DetectionResultRowIndicatorColumn::toString() {
  return CFX_ByteString("IsLeft: ") + m_isLeft + '\n' +
         CBC_DetectionResultColumn::toString();
}
void CBC_DetectionResultRowIndicatorColumn::removeIncorrectCodewords(
    CFX_ArrayTemplate<CBC_Codeword*>* codewords,
    CBC_BarcodeMetadata barcodeMetadata) {
  for (int32_t codewordRow = 0; codewordRow < codewords->GetSize();
       codewordRow++) {
    CBC_Codeword* codeword = codewords->GetAt(codewordRow);
    if (!codeword)
      continue;

    int32_t rowIndicatorValue = codeword->getValue() % 30;
    int32_t codewordRowNumber = codeword->getRowNumber();
    if (codewordRowNumber > barcodeMetadata.getRowCount()) {
      codewords->SetAt(codewordRow, nullptr);
      continue;
    }
    if (!m_isLeft) {
      codewordRowNumber += 2;
    }
    switch (codewordRowNumber % 3) {
      case 0:
        if (rowIndicatorValue * 3 + 1 !=
            barcodeMetadata.getRowCountUpperPart()) {
          codewords->SetAt(codewordRow, nullptr);
        }
        break;
      case 1:
        if (rowIndicatorValue / 3 !=
                barcodeMetadata.getErrorCorrectionLevel() ||
            rowIndicatorValue % 3 != barcodeMetadata.getRowCountLowerPart()) {
          codewords->SetAt(codewordRow, nullptr);
        }
        break;
      case 2:
        if (rowIndicatorValue + 1 != barcodeMetadata.getColumnCount()) {
          codewords->SetAt(codewordRow, nullptr);
        }
        break;
    }
  }
}