<?php declare(strict_types = 0);
/*
** Zabbix
** Copyright (C) 2001-2023 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
**/


namespace Zabbix\Widgets\Fields;

use CNumberParser,
	CParser;

use Zabbix\Widgets\CWidgetField;

class CWidgetFieldThresholds extends CWidgetField {

	public const DEFAULT_VALUE = [];

	private bool $is_binary_units;

	/**
	 * Create widget field for Thresholds selection.
	 */
	public function __construct(string $name, string $label = null, bool $is_binary_units = false) {
		parent::__construct($name, $label);

		$this->is_binary_units = $is_binary_units;

		$this
			->setDefault(self::DEFAULT_VALUE)
			->setSaveType(ZBX_WIDGET_FIELD_TYPE_STR)
			->setValidationRules(['type' =>  API_OBJECTS, 'uniq' => [['threshold']], 'fields' => [
				'color'		=> ['type' => API_COLOR, 'flags' => API_REQUIRED | API_NOT_EMPTY],
				'threshold'	=> ['type' => API_NUMERIC, 'flags' => API_REQUIRED]
			]]);
	}

	public function setValue($value): self {
		$thresholds = [];

		foreach ($value as $threshold) {
			$threshold['threshold'] = trim($threshold['threshold']);

			if ($threshold['threshold'] !== '') {
				$thresholds[] = $threshold;
			}
		}

		return parent::setValue($thresholds);
	}

	public function validate($strict = false): array {
		$errors = parent::validate($strict);

		if ($errors) {
			return $errors;
		}

		$number_parser = new CNumberParser([
			'with_size_suffix' => true,
			'with_time_suffix' => true,
			'is_binary_size' => $this->is_binary_units
		]);

		$thresholds = [];

		foreach ($this->getValue() as $threshold) {
			if ($number_parser->parse($threshold['threshold']) == CParser::PARSE_SUCCESS) {
				$thresholds[] = $threshold + ['threshold_value' => $number_parser->calcValue()];
			}
		}

		uasort($thresholds,
			static function (array $threshold_1, array $threshold_2): int {
				return $threshold_1['threshold_value'] <=> $threshold_2['threshold_value'];
			}
		);

		foreach ($thresholds as &$threshold) {
			unset($threshold['threshold_value']);
		}
		unset($threshold);

		$thresholds = array_values($thresholds);

		$this->setValue($thresholds);

		return [];
	}

	public function toApi(array &$widget_fields = []): void {
		$value = $this->getValue();

		foreach ($value as $index => $val) {
			$widget_fields[] = [
				'type' => $this->save_type,
				'name' => $this->name.'.color.'.$index,
				'value' => $val['color']
			];
			$widget_fields[] = [
				'type' => $this->save_type,
				'name' => $this->name.'.threshold.'.$index,
				'value' => $val['threshold']
			];
		}
	}
}