<?php

namespace TablePress\PhpOffice\PhpSpreadsheet\Reader\Xlsx;

use TablePress\PhpOffice\PhpSpreadsheet\Worksheet\Sparkline\Sparkline;
use TablePress\PhpOffice\PhpSpreadsheet\Worksheet\Sparkline\SparklineGroup;
use TablePress\PhpOffice\PhpSpreadsheet\Worksheet\Sparkline\SparklineType;
use TablePress\PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
use SimpleXMLElement;

/**
 * Reads the `x14:sparklineGroups` extension from a worksheet's `extLst` and
 * populates the worksheet's sparkline group collection.
 */
class Sparklines extends BaseParserClass
{
	private Worksheet $worksheet;

	private SimpleXMLElement $worksheetXml;

	public function __construct(Worksheet $workSheet, SimpleXMLElement $worksheetXml)
	{
		$this->worksheet = $workSheet;
		$this->worksheetXml = $worksheetXml;
	}

	public function load(): void
	{
		if (!isset($this->worksheetXml->extLst->ext)) {
			return;
		}

		foreach ($this->worksheetXml->extLst->ext as $ext) {
			$extAttrs = $ext->attributes() ?? [];
			if ((string) ($extAttrs['uri'] ?? '') !== Namespaces::SPARKLINE_URI) {
				continue;
			}

			$groups = $ext->children(Namespaces::DATA_VALIDATIONS1)->sparklineGroups;
			if (!isset($groups)) {
				continue;
			}

			$groupList = $groups->children(Namespaces::DATA_VALIDATIONS1)->sparklineGroup ?? null;
			if ($groupList === null) {
				continue;
			}

			foreach ($groupList as $groupXml) {
				$group = $this->readGroup($groupXml);
				if ($group !== null) {
					$this->worksheet->addSparklineGroup($group);
				}
			}
		}
	}

	private function readGroup(SimpleXMLElement $groupXml): ?SparklineGroup
	{
		$group = new SparklineGroup();
		$attributes = $groupXml->attributes() ?? [];

		$typeValue = isset($attributes['type']) ? (string) $attributes['type'] : SparklineType::Line->value;
		$group->setType(SparklineType::tryFrom($typeValue) ?? SparklineType::Line);

		if (isset($attributes['lineWeight'])) {
			$group->setLineWeight((float) $attributes['lineWeight']);
		}
		if (isset($attributes['displayEmptyCellsAs'])) {
			$group->setDisplayEmptyCellsAs((string) $attributes['displayEmptyCellsAs']);
		}
		if (isset($attributes['minAxisType'])) {
			$group->setMinAxisType((string) $attributes['minAxisType']);
		}
		if (isset($attributes['maxAxisType'])) {
			$group->setMaxAxisType((string) $attributes['maxAxisType']);
		}
		if (isset($attributes['manualMin'])) {
			$group->setManualMin((float) $attributes['manualMin']);
		}
		if (isset($attributes['manualMax'])) {
			$group->setManualMax((float) $attributes['manualMax']);
		}

		$group->setDisplayMarkers(self::boolAttr($attributes, 'markers'));
		$group->setDisplayHigh(self::boolAttr($attributes, 'high'));
		$group->setDisplayLow(self::boolAttr($attributes, 'low'));
		$group->setDisplayFirst(self::boolAttr($attributes, 'first'));
		$group->setDisplayLast(self::boolAttr($attributes, 'last'));
		$group->setDisplayNegative(self::boolAttr($attributes, 'negative'));
		$group->setDisplayXAxis(self::boolAttr($attributes, 'displayXAxis'));
		$group->setDisplayHidden(self::boolAttr($attributes, 'displayHidden'));
		$group->setRightToLeft(self::boolAttr($attributes, 'rightToLeft'));

		$this->readColors($group, $groupXml);
		$this->readSparklines($group, $groupXml);

		// A group with no sparklines carries no useful information.
		return $group->getSparklines() === [] ? null : $group;
	}

	private function readColors(SparklineGroup $group, SimpleXMLElement $groupXml): void
	{
		$children = $groupXml->children(Namespaces::DATA_VALIDATIONS1);
		$group->setColorSeries(self::color($children->colorSeries));
		$group->setColorNegative(self::color($children->colorNegative));
		$group->setColorAxis(self::color($children->colorAxis));
		$group->setColorMarkers(self::color($children->colorMarkers));
		$group->setColorFirst(self::color($children->colorFirst));
		$group->setColorLast(self::color($children->colorLast));
		$group->setColorHigh(self::color($children->colorHigh));
		$group->setColorLow(self::color($children->colorLow));
	}

	private function readSparklines(SparklineGroup $group, SimpleXMLElement $groupXml): void
	{
		$sparklinesXml = $groupXml->children(Namespaces::DATA_VALIDATIONS1)->sparklines;
		if (!isset($sparklinesXml)) {
			return;
		}

		$sparklineList = $sparklinesXml->children(Namespaces::DATA_VALIDATIONS1)->sparkline ?? null;
		if ($sparklineList === null) {
			return;
		}

		foreach ($sparklineList as $sparklineXml) {
			$xm = $sparklineXml->children(Namespaces::DATA_VALIDATIONS2);
			$dataRange = isset($xm->f) ? (string) $xm->f : '';
			$location = isset($xm->sqref) ? (string) $xm->sqref : '';
			if ($location === '') {
				continue;
			}
			$group->addSparkline(new Sparkline($location, $dataRange));
		}
	}

	/**
				 * @param mixed $attributes
				 */
				private static function boolAttr($attributes, string $name): bool
	{
		if (!($attributes instanceof SimpleXMLElement)) {
			return false;
		}
		$attrs = $attributes;

		return isset($attrs[$name]) && self::boolean((string) $attrs[$name]);
	}

	/**
	 * Extract an ARGB colour from an `x14:color*` element's `rgb` attribute.
	 */
	private static function color(?SimpleXMLElement $colorXml): ?string
	{
		if ($colorXml === null || !isset($colorXml[0])) {
			return null;
		}
		$attrs = $colorXml->attributes() ?? [];

		return isset($attrs['rgb']) ? (string) $attrs['rgb'] : null;
	}
}