<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2018 webtrees development team
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
namespace Fisharebest\Webtrees\Module;

use Fisharebest\Webtrees\Auth;
use Fisharebest\Webtrees\Controller\HourglassController;
use Fisharebest\Webtrees\Filter;
use Fisharebest\Webtrees\Http\Controllers\PedigreeChartController;
use Fisharebest\Webtrees\I18N;
use Fisharebest\Webtrees\Individual;
use Fisharebest\Webtrees\Module\InteractiveTree\TreeView;
use Fisharebest\Webtrees\Tree;

/**
 * Class ChartsBlockModule
 */
class ChartsBlockModule extends AbstractModule implements ModuleBlockInterface {
	/** {@inheritdoc} */
	public function getTitle() {
		return /* I18N: Name of a module/block */
			I18N::translate('Charts');
	}

	/** {@inheritdoc} */
	public function getDescription() {
		return /* I18N: Description of the “Charts” module */
			I18N::translate('An alternative way to display charts.');
	}

	/**
	 * Generate the HTML content of this block.
	 *
	 * @param Tree     $tree
	 * @param int      $block_id
	 * @param bool     $template
	 * @param string[] $cfg
	 *
	 * @return string
	 */
	public function getBlock(Tree $tree, int $block_id, bool $template = true, array $cfg = []): string {
		global $ctype;

		$PEDIGREE_ROOT_ID = $tree->getPreference('PEDIGREE_ROOT_ID');
		$gedcomid         = $tree->getUserPreference(Auth::user(), 'gedcomid');

		$type = $this->getBlockSetting($block_id, 'type', 'pedigree');
		$pid  = $this->getBlockSetting($block_id, 'pid', Auth::check() ? ($gedcomid ? $gedcomid : $PEDIGREE_ROOT_ID) : $PEDIGREE_ROOT_ID);

		extract($cfg, EXTR_OVERWRITE);

		$person = Individual::getInstance($pid, $tree);
		if (!$person) {
			$pid = $PEDIGREE_ROOT_ID;
			$this->setBlockSetting($block_id, 'pid', $pid);
			$person = Individual::getInstance($pid, $tree);
		}

		$title = $this->getTitle();

		if ($person) {
			$content = '';
			switch ($type) {
				case 'pedigree':
					$title     = I18N::translate('Pedigree of %s', $person->getFullName());
					$chart_url = route('pedigree-chart', [
						'xref'        => $person->getXref(),
						'ged'         => $person->getTree()->getName(),
						'generations' => 3,
						'layout'      => PedigreeChartController::PORTRAIT,
					]);
					$content = view('blocks/chart', [
						'block_id'  => $block_id,
						'chart_url' => $chart_url,
					]);
					break;
				case 'descendants':
					$title           = I18N::translate('Descendants of %s', $person->getFullName());
					$chart_url = route('descendants-chart', [
						'xref'        => $person->getXref(),
						'ged'         => $person->getTree()->getName(),
						'generations' => 2,
						'chart_style' => 0,
					]);
					$content = view('blocks/chart', [
						'block_id'  => $block_id,
						'chart_url' => $chart_url,
					]);
					break;
				case 'hourglass':
					$title           = I18N::translate('Hourglass chart of %s', $person->getFullName());
					$chart_url = route('hourglass-chart', [
						'xref'        => $person->getXref(),
						'ged'         => $person->getTree()->getName(),
						'generations' => 2,
						'layout'      => PedigreeChartController::PORTRAIT,
					]);
					$content = view('blocks/chart', [
						'block_id'  => $block_id,
						'chart_url' => $chart_url,
					]);
					break;
				case 'treenav':
					$title   = I18N::translate('Interactive tree of %s', $person->getFullName());
					$mod     = new InteractiveTreeModule(WT_MODULES_DIR . 'tree');
					$tv      = new TreeView;
					$content .= '<script>$("head").append(\'<link rel="stylesheet" href="' . $mod->css() . '" type="text/css" />\');</script>';
					$content .= '<script src="' . $mod->js() . '"></script>';
					list($html, $js) = $tv->drawViewport($person, 2);
					$content .= $html . '<script>' . $js . '</script>';
					break;
			}
		} else {
			$content = I18N::translate('You must select an individual and a chart type in the block preferences');
		}

		if ($template) {
			if ($ctype === 'gedcom' && Auth::isManager($tree)) {
				$config_url = route('tree-page-block-edit', [
					'block_id' => $block_id,
					'ged'      => $tree->getName(),
				]);
			} elseif ($ctype === 'user' && Auth::check()) {
				$config_url = route('user-page-block-edit', [
					'block_id' => $block_id,
					'ged'      => $tree->getName(),
				]);
			} else {
				$config_url = '';
			}

			return view('blocks/template', [
				'block'      => str_replace('_', '-', $this->getName()),
				'id'         => $block_id,
				'config_url' => $config_url,
				'title'      => strip_tags($title),
				'content'    => $content,
			]);
		} else {
			return $content;
		}
	}

	/** {@inheritdoc} */
	public function loadAjax(): bool {
		return true;
	}

	/** {@inheritdoc} */
	public function isUserBlock(): bool {
		return true;
	}

	/** {@inheritdoc} */
	public function isGedcomBlock(): bool {
		return true;
	}

	/**
	 * An HTML form to edit block settings
	 *
	 * @param Tree $tree
	 * @param int  $block_id
	 *
	 * @return void
	 */
	public function configureBlock(Tree $tree, int $block_id) {
		$PEDIGREE_ROOT_ID = $tree->getPreference('PEDIGREE_ROOT_ID');
		$gedcomid         = $tree->getUserPreference(Auth::user(), 'gedcomid');

		if ($_SERVER['REQUEST_METHOD'] === 'POST') {
			$this->setBlockSetting($block_id, 'type', Filter::post('type', 'pedigree|descendants|hourglass|treenav', 'pedigree'));
			$this->setBlockSetting($block_id, 'pid', Filter::post('pid', WT_REGEX_XREF));

			return;
		}

		$type = $this->getBlockSetting($block_id, 'type', 'pedigree');
		$pid  = $this->getBlockSetting($block_id, 'pid', Auth::check() ? ($gedcomid ? $gedcomid : $PEDIGREE_ROOT_ID) : $PEDIGREE_ROOT_ID);

		$charts = [
			'pedigree'    => I18N::translate('Pedigree'),
			'descendants' => I18N::translate('Descendants'),
			'hourglass'   => I18N::translate('Hourglass chart'),
			'treenav'     => I18N::translate('Interactive tree'),
		];
		uasort($charts, 'Fisharebest\Webtrees\I18N::strcasecmp');

		$individual = Individual::getInstance($pid, $tree);

		echo view('blocks/charts-config', [
			'charts'     => $charts,
			'individual' => $individual,
			'tree'       => $tree,
			'type'       => $type,
		]);
	}
}