<?php

namespace App\Komma\Kms\Core\Attributes;

use App\Komma\Kms\Core\Attributes\Models\DataTableColumn;
use App\Komma\Kms\Core\Attributes\Traits\ExplanationTrait;
use App\Komma\Kms\Core\Attributes\Traits\LabelTrait;
use App\Komma\Kms\Core\Attributes\Traits\ReadOnlyTrait;

/**
 * Class TextField
 */
class DataTable extends Attribute
{
    use LabelTrait;
    use ReadOnlyTrait;
    use ExplanationTrait;

    private $tableColumnAmount = 0;

    private $tableHasHeading = false;

    private $tableStructure = [];

    private $allowAddRow = true;

    public $hasRowNumbers = true;

    /**
     * Returns a view that visually represents this attribute
     */
    public function render()
    {
        return view('kms/attributes.dataTable', [
            'attribute' => $this,
        ]);
    }

    /**
     * Decode the value which is json from string to array
     *
     * @return array
     */
    public function getDecodedValue(): array
    {
        $jsonString = $this->getValue();

        if (empty($jsonString)) {
            return [];
        }

        $dataRows = json_decode($jsonString);

        // Validate that the data row have the same amount of columns as defined.
        // Else there has been tempered within the database...
        foreach ($dataRows as $dataRow) {
            if (count($dataRow) !== $this->tableColumnAmount) {
                throw new \UnexpectedValueException(self::class.": The database json of the data table doesn't match the given structure. Someone tempered with this data table within the database.");
            }
        }

        return $dataRows;
    }

    /**
     * Set the structure for the table
     *
     * @param array $tableStructure
     * @return DataTable
     */
    public function setTableStructure(array $tableStructure): self
    {
        $this->tableColumnAmount = count($tableStructure);

        /** @var DataTableColumn $tableRow */
        foreach ($tableStructure as $tableRow) {
            if (! is_a($tableRow, DataTableColumn::class)) {
                throw new \LogicException(self::class.": A row withing the given table structure isn't a DataTableColumn.");
            }

            // Check if any table row has a name, then we enable the table heading
            if (! empty($tableRow->getName())) {
                $this->tableHasHeading = true;
            }

            $this->tableStructure[] = $tableRow;
        }

        return $this;
    }

    /**
     * @return bool
     */
    public function hasHeading(): bool
    {
        return $this->tableHasHeading;
    }

    /**
     * @return array
     */
    public function getTableStructure(): array
    {
        return $this->tableStructure;
    }

    /**
     * @return DataTable
     */
    public function disableAddingRows(): self
    {
        $this->allowAddRow = false;

        return $this;
    }

    /**
     * @return bool
     */
    public function addingRowsIsEnabled(): bool
    {
        return $this->allowAddRow;
    }
}