<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2016 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\InteractiveTree;

use Fisharebest\Webtrees\Family;
use Fisharebest\Webtrees\Filter;
use Fisharebest\Webtrees\I18N;
use Fisharebest\Webtrees\Individual;

/**
 * Class TreeView
 */
class TreeView {
	/** @var string HTML element name */
	private $name;

	/** @var string Show all partners */
	private $all_partners;

	/**
	 * Treeview Constructor
	 *
	 * @param string $name the name of the TreeView object’s instance
	 */
	public function __construct($name = 'tree') {
		$this->name         = $name;
		$this->all_partners = Filter::cookie('allPartners', 'true|false', 'true');
	}

	/**
	 * Draw the viewport which creates the draggable/zoomable framework
	 * Size is set by the container, as the viewport can scale itself automatically
	 *
	 * @param Individual $root_person  the id of the root person
	 * @param int        $generations number of generations to draw
	 *
	 * @return string[]  HTML and Javascript
	 */
	public function drawViewport(Individual $root_person, $generations) {
		$html = '
			<a name="tv_content"></a>
			<div id="' . $this->name . '_out" class="tv_out">
				<div id="tv_tools" class="noprint">
					<ul>
						<li id="tvbCompact" class="tv_button">
							<img src="' . WT_STATIC_URL . WT_MODULES_DIR . 'tree/images/compact.png" alt="' . I18N::translate('Use compact layout') . '" title="' . I18N::translate('Use compact layout') . '">
						</li>
						<li id="tvbAllPartners" class="tv_button' . ($this->all_partners === 'true' ? ' tvPressed' : '') . '">
							<a class="icon-sfamily" href="#" title="' . I18N::translate('Show all spouses and ancestors') . '"></a>
						</li>
						<li class="tv_button" id="' . $this->name . '_loading">
							<i class="icon-loading-small"></i>
						</li>
					</ul>
				</div>
				<h2 id="tree-title">' . I18N::translate('Interactive tree of %s', $root_person->getFullName()) . '</h2>
				<div id="' . $this->name . '_in" class="tv_in" dir="ltr">
					' . $this->drawPerson($root_person, $generations, 0, null, null, true) . '
				</div>
			</div>
		';

		return [$html, 'var ' . $this->name . 'Handler = new TreeViewHandler("' . $this->name . '");'];
	}

	/**
	 * Return a JSON structure to a JSON request
	 *
	 * @param string $list list of JSON requests
	 *
	 * @return string
	 */
	public function getPersons($list) {
		global $WT_TREE;

		$list = explode(';', $list);
		$r    = [];
		foreach ($list as $jsonRequest) {
			$firstLetter = substr($jsonRequest, 0, 1);
			$jsonRequest = substr($jsonRequest, 1);
			switch ($firstLetter) {
			case 'c':
				$fidlist = explode(',', $jsonRequest);
				$flist   = [];
				foreach ($fidlist as $fid) {
					$flist[] = Family::getInstance($fid, $WT_TREE);
				}
				$r[] = $this->drawChildren($flist, 1, true);
				break;
			case 'p':
				$params = explode('@', $jsonRequest);
				$fid    = $params[0];
				$order  = $params[1];
				$f      = Family::getInstance($fid, $WT_TREE);
				if ($f->getHusband()) {
					$r[] = $this->drawPerson($f->getHusband(), 0, 1, $f, $order);
				} elseif ($f->getWife()) {
					$r[] = $this->drawPerson($f->getWife(), 0, 1, $f, $order);
				}
				break;
			}
		}

		return json_encode($r);
	}

	/**
	 * Get the details for a person and their life partner(s)
	 *
	 * @param Individual $individual the individual to return the details for
	 *
	 * @return string
	 */
	public function getDetails(Individual $individual) {
		$html = $this->getPersonDetails($individual, null);
		foreach ($individual->getSpouseFamilies() as $family) {
			$spouse = $family->getSpouse($individual);
			if ($spouse) {
				$html .= $this->getPersonDetails($spouse, $family);
			}
		}

		return $html;
	}

	/**
	 * Return the details for a person
	 *
	 * @param Individual $individual
	 * @param Family     $family
	 *
	 * @return string
	 */
	private function getPersonDetails(Individual $individual, Family $family = null) {
		$hmtl = $this->getThumbnail($individual);
		$hmtl .= '<a class="tv_link" href="' . $individual->getHtmlUrl() . '">' . $individual->getFullName() . '</a> <a href="module.php?mod=tree&amp;mod_action=treeview&amp;rootid=' . $individual->getXref() . '" title="' . I18N::translate('Interactive tree of %s', strip_tags($individual->getFullName())) . '" class="icon-button_indi tv_link tv_treelink"></a>';
		foreach ($individual->getFacts(WT_EVENTS_BIRT, true) as $fact) {
			$hmtl .= $fact->summary();
		}
		if ($family) {
			foreach ($family->getFacts(WT_EVENTS_MARR, true) as $fact) {
				$hmtl .= $fact->summary();
			}
		}
		foreach ($individual->getFacts(WT_EVENTS_DEAT, true) as $fact) {
			$hmtl .= $fact->summary();
		}

		return '<div class="tv' . $individual->getSex() . ' tv_person_expanded">' . $hmtl . '</div>';
	}

	/**
	 * Draw the children for some families
	 *
	 * @param Family[] $familyList array of families to draw the children for
	 * @param int      $gen        number of generations to draw
	 * @param bool     $ajax       setted to true for an ajax call
	 *
	 * @return string
	 */
	private function drawChildren(array $familyList, $gen = 1, $ajax = false) {
		$html          = '';
		$children2draw = [];
		$f2load        = [];

		foreach ($familyList as $f) {
			if (empty($f)) {
				continue;
			}
			$children = $f->getChildren();
			if ($children) {
				$f2load[] = $f->getXref();
				foreach ($children as $child) {
					// Eliminate duplicates - e.g. when adopted by a step-parent
					$children2draw[$child->getXref()] = $child;
				}
			}
		}
		$tc = count($children2draw);
		if ($tc) {
			$f2load = implode(',', $f2load);
			$nbc    = 0;
			foreach ($children2draw as $child) {
				$nbc++;
				if ($tc == 1) {
					$co = 'c'; // unique
				} elseif ($nbc == 1) {
					$co = 't'; // first
				} elseif ($nbc == $tc) {
					$co = 'b'; //last
				} else {
					$co = 'h';
				}
				$html .= $this->drawPerson($child, $gen - 1, -1, null, $co);
			}
			if (!$ajax) {
				$html = '<td align="right"' . ($gen == 0 ? ' abbr="c' . $f2load . '"' : '') . '>' . $html . '</td>' . $this->drawHorizontalLine();
			}
		}

		return $html;
	}

	/**
	 * Draw a person in the tree
	 *
	 * @param Individual $person The Person object to draw the box for
	 * @param int        $gen    The number of generations up or down to print
	 * @param int        $state  Whether we are going up or down the tree, -1 for descendents +1 for ancestors
	 * @param Family     $pfamily
	 * @param string     $order  first (1), last(2), unique(0), or empty. Required for drawing lines between boxes
	 * @param bool       $isRoot
	 *
	 * @return string
	 *
	 * Notes : "spouse" means explicitely married partners. Thus, the word "partner"
	 * (for "life partner") here fits much better than "spouse" or "mate"
	 * to translate properly the modern french meaning of "conjoint"
	 */
	private function drawPerson(Individual $person, $gen, $state, Family $pfamily = null, $order = null, $isRoot = false) {
		if ($gen < 0) {
			return '';
		}
		if (!empty($pfamily)) {
			$partner = $pfamily->getSpouse($person);
		} else {
			$partner = $person->getCurrentSpouse();
		}
		if ($isRoot) {
			$html = '<table id="tvTreeBorder" class="tv_tree"><tbody><tr><td id="tv_tree_topleft"></td><td id="tv_tree_top"></td><td id="tv_tree_topright"></td></tr><tr><td id="tv_tree_left"></td><td>';
		} else {
			$html = '';
		}
		/* height 1% : this hack enable the div auto-dimensioning in td for FF & Chrome */
		$html .= '<table class="tv_tree"' . ($isRoot ? ' id="tv_tree"' : '') . ' style="height: 1%"><tbody><tr>';

		if ($state <= 0) {
			// draw children
			$html .= $this->drawChildren($person->getSpouseFamilies(), $gen);
		} else {
			// draw the parent’s lines
			$html .= $this->drawVerticalLine($order) . $this->drawHorizontalLine();
		}

		/* draw the person. Do NOT add person or family id as an id, since a same person could appear more than once in the tree !!! */
		// Fixing the width for td to the box initial width when the person is the root person fix a rare bug that happen when a person without child and without known parents is the root person : an unwanted white rectangle appear at the right of the person’s boxes, otherwise.
		$html .= '<td' . ($isRoot ? ' style="width:1px"' : '') . '><div class="tv_box' . ($isRoot ? ' rootPerson' : '') . '" dir="' . I18N::direction() . '" style="text-align: ' . (I18N::direction() === 'rtl' ? 'right' : 'left') . '; direction: ' . I18N::direction() . '" abbr="' . $person->getXref() . '" onclick="' . $this->name . 'Handler.expandBox(this, event);">';
		$html .= $this->drawPersonName($person);
		$fop = []; // $fop is fathers of partners
		if (!is_null($partner)) {
			$dashed = '';
			foreach ($person->getSpouseFamilies() as $family) {
				$spouse = $family->getSpouse($person);
				if ($spouse) {
					if ($spouse === $partner || $this->all_partners === 'true') {
						$spouse_parents = $spouse->getPrimaryChildFamily();
						if ($spouse_parents && $spouse_parents->getHusband()) {
							$fop[] = [$spouse_parents->getHusband(), $spouse_parents];
						} elseif ($spouse_parents && $spouse_parents->getWife()) {
							$fop[] = [$spouse_parents->getWife(), $spouse_parents];
						}
						$html .= $this->drawPersonName($spouse, $dashed);
						if ($this->all_partners !== 'true') {
							break; // we can stop here the foreach loop
						}
						$dashed = 'dashed';
					}
				}
			}
		}
		$html .= '</div></td>';

		$primaryChildFamily = $person->getPrimaryChildFamily();
		if (!empty($primaryChildFamily)) {
			$parent = $primaryChildFamily->getHusband();
			if (empty($parent)) {
				$parent = $primaryChildFamily->getWife();
			}
		}
		if (!empty($parent) || count($fop) || ($state < 0)) {
			$html .= $this->drawHorizontalLine();
		}
		/* draw the parents */
		if ($state >= 0 && (!empty($parent) || count($fop))) {
			$unique = (empty($parent) || count($fop) == 0);
			$html .= '<td align="left"><table class="tv_tree"><tbody>';
			if (!empty($parent)) {
				$u = $unique ? 'c' : 't';
				$html .= '<tr><td ' . ($gen == 0 ? ' abbr="p' . $primaryChildFamily->getXref() . '@' . $u . '"' : '') . '>';
				$html .= $this->drawPerson($parent, $gen - 1, 1, $primaryChildFamily, $u);
				$html .= '</td></tr>';
			}
			if (count($fop)) {
				$n  = 0;
				$nb = count($fop);
				foreach ($fop as $p) {
					$n++;
					$u = $unique ? 'c' : ($n == $nb || empty($p[1]) ? 'b' : 'h');
					$html .= '<tr><td ' . ($gen == 0 ? ' abbr="p' . $p[1]->getXref() . '@' . $u . '"' : '') . '>' . $this->drawPerson($p[0], $gen - 1, 1, $p[1], $u) . '</td></tr>';
				}
			}
			$html .= '</tbody></table></td>';
		}
		if ($state < 0) {
			$html .= $this->drawVerticalLine($order);
		}
		$html .= '</tr></tbody></table>';
		if ($isRoot) {
			$html .= '</td><td id="tv_tree_right"></td></tr><tr><td id="tv_tree_bottomleft"></td><td id="tv_tree_bottom"></td><td id="tv_tree_bottomright"></td></tr></tbody></table>';
		}

		return $html;
	}

	/**
	 * Draw a person name preceded by sex icon, with parents as tooltip
	 *
	 * @param Individual $individual an individual
	 * @param string        $dashed     if = 'dashed' print dashed top border to separate multiple spuses
	 *
	 * @return string
	 */
	private function drawPersonName(Individual $individual, $dashed = '') {
		if ($this->all_partners === 'true') {
			$family = $individual->getPrimaryChildFamily();
			if ($family) {
				$family_name = strip_tags($family->getFullName());
			} else {
				$family_name = I18N::translateContext('unknown family', 'unknown');
			}
			switch ($individual->getSex()) {
			case 'M':
				$title = ' title="' . /* I18N: e.g. “Son of [father name & mother name]” */ I18N::translate('Son of %s', $family_name) . '"';
				break;
			case 'F':
				$title = ' title="' . /* I18N: e.g. “Daughter of [father name & mother name]” */ I18N::translate('Daughter of %s', $family_name) . '"';
				break;
			default:
				$title = ' title="' . /* I18N: e.g. “Child of [father name & mother name]” */ I18N::translate('Child of %s', $family_name) . '"';
				break;
			}
		} else {
			$title = '';
		}
		$sex = $individual->getSex();

		return '<div class="tv' . $sex . ' ' . $dashed . '"' . $title . '><a href="' . $individual->getHtmlUrl() . '"></a>' . $individual->getFullName() . ' <span class="dates">' . $individual->getLifeSpan() . '</span></div>';
	}

	/**
	 * Get the thumbnail image for the given person
	 *
	 * @param Individual $individual
	 *
	 * @return string
	 */
	private function getThumbnail(Individual $individual) {
		if ($individual->getTree()->getPreference('SHOW_HIGHLIGHT_IMAGES')) {
			return $individual->displayImage();
		} else {
			return '';
		}
	}

	/**
	 * Draw a vertical line
	 *
	 * @param string $order A parameter that set how to draw this line with auto-redimensionning capabilities
	 *
	 * @return string
	 * WARNING : some tricky hacks are required in CSS to ensure cross-browser compliance
	 * some browsers shows an image, which imply a size limit in height,
	 * and some other browsers (ex: firefox) shows a <div> tag, which have no size limit in height
	 * Therefore, Firefox is a good choice to print very big trees.
	 */
	private function drawVerticalLine($order) {
		return '<td class="tv_vline tv_vline_' . $order . '"><div class="tv_vline tv_vline_' . $order . '"></div></td>';
	}

	/**
	 * Draw an horizontal line
	 */
	private function drawHorizontalLine() {
		return '<td class="tv_hline"><div class="tv_hline"></div></td>';
	}
}
