<?php

namespace App\Helpers;

use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Cell\Coordinate;

class ExcelHelper
{
    public static function copyRows( Worksheet $sheet, $srcRange, $dstCell, Worksheet $destSheet = null): void
    {

        if( !isset($destSheet)) {
            $destSheet = $sheet;
        }

        if( !preg_match('/^([A-Z]+)(\d+):([A-Z]+)(\d+)$/', $srcRange, $srcRangeMatch) ) {
            // Invalid src range
            return;
        }

        if( !preg_match('/^([A-Z]+)(\d+)$/', $dstCell, $destCellMatch) ) {
            // Invalid dest cell
            return;
        }

        $srcColumnStart = $srcRangeMatch[1];
        $srcRowStart = $srcRangeMatch[2];
        $srcColumnEnd = $srcRangeMatch[3];
        $srcRowEnd = $srcRangeMatch[4];

        $destColumnStart = $destCellMatch[1];
        $destRowStart = $destCellMatch[2];

        $srcColumnStart = Coordinate::columnIndexFromString($srcColumnStart);
        $srcColumnEnd = Coordinate::columnIndexFromString($srcColumnEnd);
        $destColumnStart = Coordinate::columnIndexFromString($destColumnStart);

        $rowCount = 0;
        for ($row = $srcRowStart; $row <= $srcRowEnd; $row++) {
            $colCount = 0;
            for ($col = $srcColumnStart; $col <= $srcColumnEnd; $col++) {
                $cell = $sheet->getCell([$col, $row]);
                $style = $sheet->getStyle([$col, $row]);
                $dstCell = Coordinate::stringFromColumnIndex($destColumnStart + $colCount) . (string)((int)$destRowStart + (int)$rowCount);
                $destSheet->setCellValue($dstCell, $cell->getValue());
                $destSheet->duplicateStyle($style, $dstCell);

                // Set width of column, but only once per column
                if ($rowCount === 0) {
                    $w = $sheet->getColumnDimensionByColumn($col)->getWidth();
                    $destSheet->getColumnDimensionByColumn ($destColumnStart + $colCount)->setAutoSize(false);
                    $destSheet->getColumnDimensionByColumn ($destColumnStart + $colCount)->setWidth($w);
                }

                $colCount++;
            }

            $h = $sheet->getRowDimension($row)->getRowHeight();
            $destSheet->getRowDimension((int)$destRowStart + $rowCount)->setRowHeight($h);

            $rowCount++;
        }

        foreach ($sheet->getMergeCells() as $mergeCell) {
            $mc = explode(":", $mergeCell);
            $mergeColSrcStart = Coordinate::columnIndexFromString(preg_replace("/[0-9]*/", "", $mc[0]));
            $mergeColSrcEnd = Coordinate::columnIndexFromString(preg_replace("/[0-9]*/", "", $mc[1]));
            $mergeRowSrcStart = ((int)preg_replace("/[A-Z]*/", "", $mc[0]));
            $mergeRowSrcEnd = ((int)preg_replace("/[A-Z]*/", "", $mc[1]));

            $relativeColStart = $mergeColSrcStart - $srcColumnStart;
            $relativeColEnd = $mergeColSrcEnd - $srcColumnStart;
            $relativeRowStart = $mergeRowSrcStart - $srcRowStart;
            $relativeRowEnd = $mergeRowSrcEnd - $srcRowStart;

            if (0 <= $mergeRowSrcStart && $mergeRowSrcStart >= $srcRowStart && $mergeRowSrcEnd <= $srcRowEnd) {
                $targetColStart = Coordinate::stringFromColumnIndex($destColumnStart + $relativeColStart);
                $targetColEnd = Coordinate::stringFromColumnIndex($destColumnStart + $relativeColEnd);
                $targetRowStart = (int)$destRowStart + $relativeRowStart;
                $targetRowEnd = (int)$destRowStart + $relativeRowEnd;

                $merge = (string)$targetColStart . (string)($targetRowStart) . ":" . (string)$targetColEnd . (string)($targetRowEnd);
                //Merge target cells
                $destSheet->mergeCells($merge);
            }
        }
    }

    public static function copyStyleXFCollection(Spreadsheet $sourceSheet, Spreadsheet $destSheet) {
        $collection = $sourceSheet->getCellXfCollection();

        foreach ($collection as $key => $item) {
            $destSheet->addCellXf($item);
        }
    }
}