<?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.
**/


class CControllerCopyCreate extends CController {

	protected function init(): void {
		$this->setPostContentType(self::POST_CONTENT_TYPE_JSON);
	}

	protected function checkInput(): bool {
		$fields = [
			'copy_targetids' =>	'required|array|not_empty',
			'itemids' =>		'array_db items.itemid',
			'triggerids' =>		'array_db triggers.triggerid',
			'graphids' =>		'array_db graphs.graphid',
			'src_hostid' =>		'db hosts.hostid',
			'copy_type' =>		'required|in '.implode(',', [
									COPY_TYPE_TO_HOST_GROUP, COPY_TYPE_TO_HOST, COPY_TYPE_TO_TEMPLATE,
									COPY_TYPE_TO_TEMPLATE_GROUP
								]),
			'source' => 		'required|in '.implode(',', ['items', 'triggers', 'graphs'])
		];

		$ret = $this->validateInput($fields);

		if (!$ret) {
			$this->setResponse(
				(new CControllerResponseData(['main_block' => json_encode([
					'error' => [
						'messages' => array_column(get_and_clear_messages(), 'message')
					]
				])]))->disableView()
			);
		}

		return $ret;
	}

	protected function checkPermissions(): bool {
		$source = $this->getInput('source');
		$copy_type = $this->getInput('copy_type');

		if (($copy_type == COPY_TYPE_TO_HOST || $copy_type == COPY_TYPE_TO_HOST_GROUP)
				&& !$this->checkAccess(CRoleHelper::UI_CONFIGURATION_HOSTS)) {
			return false;
		}
		elseif (($copy_type == COPY_TYPE_TO_TEMPLATE || $copy_type == COPY_TYPE_TO_TEMPLATE_GROUP)
				&& !$this->checkAccess(CRoleHelper::UI_CONFIGURATION_TEMPLATES)) {
			return false;
		}

		if (!$this->checkTargetPermissions($copy_type)) {
			return false;
		}

		if ($source === 'items' && $this->hasInput('itemids')) {
			$items_count = API::Item()->get([
				'countOutput' => true,
				'itemids' => $this->getInput('itemids')
			]);

			return $items_count == count($this->getInput('itemids'));
		}
		elseif ($source === 'triggers' && $this->hasInput('triggerids')) {
			$triggers_count = API::Trigger()->get([
				'countOutput' => true,
				'triggerids' => $this->getInput('triggerids')
			]);

			return $triggers_count == count($this->getInput('triggerids'));
		}
		elseif ($source === 'graphs' && $this->hasInput('graphids')) {
			$graphs_count = API::Graph()->get([
				'countOutput' => true,
				'graphids' => $this->getInput('graphids')
			]);

			return $graphs_count == count($this->getInput('graphids'));
		}

		return false;
	}

	private function checkTargetPermissions(int $copy_type): bool {
		$copy_targetids = $this->getInput('copy_targetids');

		switch ($copy_type) {
			case COPY_TYPE_TO_HOST:
				$copy_targets = API::Host()->get([
					'countOutput' => true,
					'hostids' => $copy_targetids,
					'editable' => true
				]);

				return $copy_targets == count($copy_targetids);

			case COPY_TYPE_TO_TEMPLATE:
				$copy_targets = API::Template()->get([
					'countOutput' => true,
					'templateids' => $copy_targetids,
					'editable' => true
				]);

				return $copy_targets == count($copy_targetids);

			case COPY_TYPE_TO_HOST_GROUP:
				$copy_targets = API::HostGroup()->get([
					'countOutput' => true,
					'groupids' => $copy_targetids
				]);

				return $copy_targets == count($copy_targetids);

			case COPY_TYPE_TO_TEMPLATE_GROUP:
				$copy_targets = API::TemplateGroup()->get([
					'countOutput' => true,
					'groupids' => $copy_targetids
				]);

				return $copy_targets == count($copy_targetids);
		}

		return false;
	}

	protected function doAction(): void {
		$copy_targetids = $this->getTargetIds();
		$dst_options = in_array($this->getInput('copy_type'), [COPY_TYPE_TO_TEMPLATE, COPY_TYPE_TO_TEMPLATE_GROUP])
			? ['templateids' => $copy_targetids]
			: ['hostids' => $copy_targetids];

		$success = false;
		DBstart();

		switch ($this->getInput('source')) {
			case 'items':
				$src_options = ['itemids' => $this->getInput('itemids')];
				$success = CItemHelper::copy($src_options, $dst_options);

				$items_count = count($src_options['itemids']);
				$title = $success
					? _n('Item copied', 'Items copied', $items_count)
					: _n('Cannot copy item', 'Cannot copy items', $items_count);
				break;

			case 'triggers':
				$src_options = ['triggerids' => $this->getInput('triggerids')]
					+ ($this->hasInput('src_hostid') ? ['hostids' => $this->getInput('src_hostid')] : []);
				$success = CTriggerHelper::copy($src_options, $dst_options);

				$triggers_count = count($src_options['triggerids']);
				$title = $success
					? _n('Trigger copied', 'Triggers copied', $triggers_count)
					: _n('Cannot copy trigger', 'Cannot copy triggers', $triggers_count);
				break;

			case 'graphs':
				$src_options = ['graphids' => $this->getInput('graphids')]
					+ ($this->hasInput('src_hostid') ? ['hostids' => $this->getInput('src_hostid')] : []);
				$success = CGraphHelper::copy($src_options, $dst_options);

				$graphs_count = count($src_options['graphids']);
				$title = $success
					? _n('Graph copied', 'Graphs copied', $graphs_count)
					: _n('Cannot copy graph', 'Cannot copy graphs', $graphs_count);
				break;
		}

		DBend($success);

		$output = $success
			? ['success' => ['title' => $title]]
			: ['error' => ['title' => $title, 'messages' => array_column(get_and_clear_messages(), 'message')]];

		$this->setResponse(new CControllerResponseData(['main_block' => json_encode($output)]));
	}

	private function getTargetIds(): array {
		$copy_targetids = $this->getInput('copy_targetids', []);
		$copy_type = $this->getInput('copy_type');
		$targetids = [];

		if ($copy_type == COPY_TYPE_TO_HOST || $copy_type == COPY_TYPE_TO_TEMPLATE) {
			$targetids = $copy_targetids;
		}
		elseif ($copy_type == COPY_TYPE_TO_HOST_GROUP) {
			$targetids = array_keys(API::Host()->get([
				'output' => [],
				'groupids' => $copy_targetids,
				'preservekeys' => true
			]));
		}
		elseif ($copy_type == COPY_TYPE_TO_TEMPLATE_GROUP) {
			$targetids = array_keys(API::Template()->get([
				'output' => [],
				'groupids' => $copy_targetids,
				'preservekeys' => true
			]));
		}

		return $targetids;
	}
}