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<?php

declare(strict_types=1);

namespace OpenSpout\Writer\Common\Entity;

use OpenSpout\Writer\AutoFilter;

use OpenSpout\Writer\Common\ColumnWidth;

use OpenSpout\Writer\Common\Manager\SheetManager;

use OpenSpout\Writer\Exception\InvalidSheetNameException;

use OpenSpout\Writer\XLSX\Entity\SheetView;

/**

 * External representation of a worksheet.

 */

final class Sheet

{

    public const DEFAULT_SHEET_NAME_PREFIX = 'Sheet';

    /** @var 0|positive-int Index of the sheet, based on order in the workbook (zero-based) */

    private readonly int $index;

    /** @var string ID of the sheet's associated workbook. Used to restrict sheet name uniqueness enforcement to a single workbook */

    private readonly string $associatedWorkbookId;

    /** @var string Name of the sheet */

    private string $name;

    /** @var bool Visibility of the sheet */

    private bool $isVisible;

    /** @var SheetManager Sheet manager */

    private readonly SheetManager $sheetManager;

    private ?SheetView $sheetView = null;

    /** @var 0|positive-int */

    private int $writtenRowCount = 0;

    private ?AutoFilter $autoFilter = null;

    /** @var ColumnWidth[] Array of min-max-width arrays */

    private array $COLUMN_WIDTHS = [];

    /** @var string rows to repeat at top */

    private ?string $printTitleRows = null;

    /**

     * @param 0|positive-int $sheetIndex           Index of the sheet, based on order in the workbook (zero-based)

     * @param string         $associatedWorkbookId ID of the sheet's associated workbook

     * @param SheetManager   $sheetManager         To manage sheets

     */

    public function __construct(int $sheetIndex, string $associatedWorkbookId, SheetManager $sheetManager)

    {

        $this->index = $sheetIndex;

        $this->associatedWorkbookId = $associatedWorkbookId;

        $this->sheetManager = $sheetManager;

        $this->sheetManager->markWorkbookIdAsUsed($associatedWorkbookId);

        $this->setName(self::DEFAULT_SHEET_NAME_PREFIX.($sheetIndex + 1));

        $this->setIsVisible(true);

    }

    /**

     * @return 0|positive-int Index of the sheet, based on order in the workbook (zero-based)

     */

    public function getIndex(): int

    {

        return $this->index;

    }

    public function getAssociatedWorkbookId(): string

    {

        return $this->associatedWorkbookId;

    }

    /**

     * @return string Name of the sheet

     */

    public function getName(): string

    {

        return $this->name;

    }

    /**

     * Sets the name of the sheet. Note that Excel has some restrictions on the name:

     *  - it should not be blank

     *  - it should not exceed 31 characters

     *  - it should not contain these characters: \ / ? * : [ or ]

     *  - it should be unique.

     *

     * @param string $name Name of the sheet

     *

     * @throws InvalidSheetNameException if the sheet's name is invalid

     */

    public function setName(string $name): self

    {

        $this->sheetManager->throwIfNameIsInvalid($name, $this);

        $this->name = $name;

        $this->sheetManager->markSheetNameAsUsed($this);

        return $this;

    }

    /**

     * @return bool isVisible Visibility of the sheet

     */

    public function isVisible(): bool

    {

        return $this->isVisible;

    }

    /**

     * @param bool $isVisible Visibility of the sheet

     */

    public function setIsVisible(bool $isVisible): self

    {

        $this->isVisible = $isVisible;

        return $this;

    }

    /**

     * @return $this

     */

    public function setSheetView(SheetView $sheetView): self

    {

        $this->sheetView = $sheetView;

        return $this;

    }

    public function getSheetView(): ?SheetView

    {

        return $this->sheetView;

    }

    /**

     * @internal

     */

    public function incrementWrittenRowCount(): void

    {

        ++$this->writtenRowCount;

    }

    /**

     * @return 0|positive-int

     */

    public function getWrittenRowCount(): int

    {

        return $this->writtenRowCount;

    }

    /**

     * @return $this

     */

    public function setAutoFilter(?AutoFilter $autoFilter): self

    {

        $this->autoFilter = $autoFilter;

        return $this;

    }

    public function getAutoFilter(): ?AutoFilter

    {

        return $this->autoFilter;

    }

    /**

     * @param positive-int ...$columns One or more columns with this width

     */

    public function setColumnWidth(float $width, int ...$columns): void

    {

        // Gather sequences

        $sequence = [];

        foreach ($columns as $column) {

            $sequenceLength = \count($sequence);

            if ($sequenceLength > 0) {

                $previousValue = $sequence[$sequenceLength - 1];

                if ($column !== $previousValue + 1) {

                    $this->setColumnWidthForRange($width, $sequence[0], $previousValue);

                    $sequence = [];

                }

            }

            $sequence[] = $column;

        }

        $this->setColumnWidthForRange($width, $sequence[0], $sequence[\count($sequence) - 1]);

    }

    /**

     * @param float        $width The width to set

     * @param positive-int $start First column index of the range

     * @param positive-int $end   Last column index of the range

     */

    public function setColumnWidthForRange(float $width, int $start, int $end): void

    {

        $this->COLUMN_WIDTHS[] = new ColumnWidth($start, $end, $width);

    }

    /**

     * @internal

     *

     * @return ColumnWidth[]

     */

    public function getColumnWidths(): array

    {

        return $this->COLUMN_WIDTHS;

    }

    public function getPrintTitleRows(): ?string

    {

        return $this->printTitleRows;

    }

    public function setPrintTitleRows(string $printTitleRows): void

    {

        $this->printTitleRows = $printTitleRows;

    }

}