<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2017 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;

/**
 * A GEDCOM family (FAM) object.
 */
class Family extends GedcomRecord {
	const RECORD_TYPE = 'FAM';
	const URL_PREFIX  = 'family.php?famid=';

	/** @var Individual|null The husband (or first spouse for same-sex couples) */
	private $husb;

	/** @var Individual|null The wife (or second spouse for same-sex couples) */
	private $wife;

	/**
	 * Create a GedcomRecord object from raw GEDCOM data.
	 *
	 * @param string      $xref
	 * @param string      $gedcom  an empty string for new/pending records
	 * @param string|null $pending null for a record with no pending edits,
	 *                             empty string for records with pending deletions
	 * @param Tree        $tree
	 */
	public function __construct($xref, $gedcom, $pending, $tree) {
		parent::__construct($xref, $gedcom, $pending, $tree);

		// Fetch family members
		if (preg_match_all('/^1 (?:HUSB|WIFE|CHIL) @(.+)@/m', $gedcom . $pending, $match)) {
			Individual::load($tree, $match[1]);
		}

		if (preg_match('/^1 HUSB @(.+)@/m', $gedcom . $pending, $match)) {
			$this->husb = Individual::getInstance($match[1], $tree);
		}
		if (preg_match('/^1 WIFE @(.+)@/m', $gedcom . $pending, $match)) {
			$this->wife = Individual::getInstance($match[1], $tree);
		}

		// Make sure husb/wife are the right way round.
		if ($this->husb && $this->husb->getSex() === 'F' || $this->wife && $this->wife->getSex() === 'M') {
			list($this->husb, $this->wife) = [$this->wife, $this->husb];
		}
	}

	/**
	 * Generate a private version of this record
	 *
	 * @param int $access_level
	 *
	 * @return string
	 */
	protected function createPrivateGedcomRecord($access_level) {
		$SHOW_PRIVATE_RELATIONSHIPS = $this->tree->getPreference('SHOW_PRIVATE_RELATIONSHIPS');

		$rec = '0 @' . $this->xref . '@ FAM';
		// Just show the 1 CHIL/HUSB/WIFE tag, not any subtags, which may contain private data
		preg_match_all('/\n1 (?:CHIL|HUSB|WIFE) @(' . WT_REGEX_XREF . ')@/', $this->gedcom, $matches, PREG_SET_ORDER);
		foreach ($matches as $match) {
			$rela = Individual::getInstance($match[1], $this->tree);
			if ($rela && ($SHOW_PRIVATE_RELATIONSHIPS || $rela->canShow($access_level))) {
				$rec .= $match[0];
			}
		}

		return $rec;
	}

	/**
	 * Fetch data from the database
	 *
	 * @param string $xref
	 * @param int    $tree_id
	 *
	 * @return null|string
	 */
	protected static function fetchGedcomRecord($xref, $tree_id) {
		return Database::prepare(
			"SELECT f_gedcom FROM `##families` WHERE f_id = :xref AND f_file = :tree_id"
		)->execute([
			'xref'    => $xref,
			'tree_id' => $tree_id,
		])->fetchOne();
	}

	/**
	 * Get the male (or first female) partner of the family
	 *
	 * @param $access_level int|null
	 *
	 * @return Individual|null
	 */
	public function getHusband($access_level = null) {
		$SHOW_PRIVATE_RELATIONSHIPS = $this->tree->getPreference('SHOW_PRIVATE_RELATIONSHIPS');

		if ($this->husb && ($SHOW_PRIVATE_RELATIONSHIPS || $this->husb->canShowName($access_level))) {
			return $this->husb;
		} else {
			return null;
		}
	}

	/**
	 * Get the female (or second male) partner of the family
	 *
	 * @param $access_level int|null
	 *
	 * @return Individual|null
	 */
	public function getWife($access_level = null) {
		$SHOW_PRIVATE_RELATIONSHIPS = $this->tree->getPreference('SHOW_PRIVATE_RELATIONSHIPS');

		if ($this->wife && ($SHOW_PRIVATE_RELATIONSHIPS || $this->wife->canShowName($access_level))) {
			return $this->wife;
		} else {
			return null;
		}
	}

	/**
	 * Each object type may have its own special rules, and re-implement this function.
	 *
	 * @param int $access_level
	 *
	 * @return bool
	 */
	protected function canShowByType($access_level) {
		// Hide a family if any member is private
		preg_match_all('/\n1 (?:CHIL|HUSB|WIFE) @(' . WT_REGEX_XREF . ')@/', $this->gedcom, $matches);
		foreach ($matches[1] as $match) {
			$person = Individual::getInstance($match, $this->tree);
			if ($person && !$person->canShow($access_level)) {
				return false;
			}
		}

		return true;
	}

	/**
	 * Can the name of this record be shown?
	 *
	 * @param int|null $access_level
	 *
	 * @return bool
	 */
	public function canShowName($access_level = null) {
		// We can always see the name (Husband-name + Wife-name), however,
		// the name will often be "private + private"
		return true;
	}

	/**
	 * Find the spouse of a person.
	 *
	 * @param Individual $person
	 * @param int|null   $access_level
	 *
	 * @return Individual|null
	 */
	public function getSpouse(Individual $person, $access_level = null) {
		if ($person === $this->wife) {
			return $this->getHusband($access_level);
		} else {
			return $this->getWife($access_level);
		}
	}

	/**
	 * Get the (zero, one or two) spouses from this family.
	 *
	 * @param int|null $access_level
	 *
	 * @return Individual[]
	 */
	public function getSpouses($access_level = null) {
		return array_filter([
			$this->getHusband($access_level),
			$this->getWife($access_level),
		]);
	}

	/**
	 * Get a list of this family’s children.
	 *
	 * @param int|null $access_level
	 *
	 * @return Individual[]
	 */
	public function getChildren($access_level = null) {
		if ($access_level === null) {
			$access_level = Auth::accessLevel($this->tree);
		}

		$SHOW_PRIVATE_RELATIONSHIPS = $this->tree->getPreference('SHOW_PRIVATE_RELATIONSHIPS');

		$children = [];
		foreach ($this->getFacts('CHIL', false, $access_level, $SHOW_PRIVATE_RELATIONSHIPS) as $fact) {
			$child = $fact->getTarget();
			if ($child && ($SHOW_PRIVATE_RELATIONSHIPS || $child->canShowName($access_level))) {
				$children[] = $child;
			}
		}

		return $children;
	}

	/**
	 * Static helper function to sort an array of families by marriage date
	 *
	 * @param Family $x
	 * @param Family $y
	 *
	 * @return int
	 */
	public static function compareMarrDate(Family $x, Family $y) {
		return Date::compare($x->getMarriageDate(), $y->getMarriageDate());
	}

	/**
	 * Number of children - for the individual list
	 *
	 * @return int
	 */
	public function getNumberOfChildren() {
		$nchi = count($this->getChildren());
		foreach ($this->getFacts('NCHI') as $fact) {
			$nchi = max($nchi, (int) $fact->getValue());
		}

		return $nchi;
	}

	/**
	 * get the marriage event
	 *
	 * @return Fact
	 */
	public function getMarriage() {
		return $this->getFirstFact('MARR');
	}

	/**
	 * Get marriage date
	 *
	 * @return Date
	 */
	public function getMarriageDate() {
		$marriage = $this->getMarriage();
		if ($marriage) {
			return $marriage->getDate();
		} else {
			return new Date('');
		}
	}

	/**
	 * Get the marriage year - displayed on lists of families
	 *
	 * @return int
	 */
	public function getMarriageYear() {
		return $this->getMarriageDate()->minimumDate()->y;
	}

	/**
	 * Get the marriage place
	 *
	 * @return Place
	 */
	public function getMarriagePlace() {
		$marriage = $this->getMarriage();

		return $marriage->getPlace();
	}

	/**
	 * Get a list of all marriage dates - for the family lists.
	 *
	 * @return Date[]
	 */
	public function getAllMarriageDates() {
		foreach (explode('|', WT_EVENTS_MARR) as $event) {
			if ($array = $this->getAllEventDates($event)) {
				return $array;
			}
		}

		return [];
	}

	/**
	 * Get a list of all marriage places - for the family lists.
	 *
	 * @return string[]
	 */
	public function getAllMarriagePlaces() {
		foreach (explode('|', WT_EVENTS_MARR) as $event) {
			if ($array = $this->getAllEventPlaces($event)) {
				return $array;
			}
		}

		return [];
	}

	/**
	 * Derived classes should redefine this function, otherwise the object will have no name
	 *
	 * @return string[][]
	 */
	public function getAllNames() {
		if (is_null($this->_getAllNames)) {
			// Check the script used by each name, so we can match cyrillic with cyrillic, greek with greek, etc.
			$husb_names = [];
			if ($this->husb) {
				$husb_names = array_filter($this->husb->getAllNames(), function(array $x) { return $x['type'] !== '_MARNM'; } );
			}
			// If the individual only has married names, create a dummy birth name.
			if (empty($husb_names)) {
				$husb_names[] = [
					'type' => 'BIRT',
					'sort' => '@N.N.',
					'full' => I18N::translateContext('Unknown given name', '…') . ' ' . I18N::translateContext('Unknown surname', '…'),
				];
			}
			foreach ($husb_names as $n => $husb_name) {
				$husb_names[$n]['script'] = I18N::textScript($husb_name['full']);
			}

			$wife_names = [];
			if ($this->wife) {
				$wife_names = array_filter($this->wife->getAllNames(), function(array $x) { return $x['type'] !== '_MARNM'; } );
			}
			// If the individual only has married names, create a dummy birth name.
			if (empty($wife_names)) {
				$wife_names[] = [
					'type' => 'BIRT',
					'sort' => '@N.N.',
					'full' => I18N::translateContext('Unknown given name', '…') . ' ' . I18N::translateContext('Unknown surname', '…'),
				];
			}
			foreach ($wife_names as $n => $wife_name) {
				$wife_names[$n]['script'] = I18N::textScript($wife_name['full']);
			}

			// Add the matched names first
			foreach ($husb_names as $husb_name) {
				foreach ($wife_names as $wife_name) {
					if ($husb_name['script'] == $wife_name['script']) {
						$this->_getAllNames[] = [
							'type' => $husb_name['type'],
							'sort' => $husb_name['sort'] . ' + ' . $wife_name['sort'],
							'full' => $husb_name['full'] . ' + ' . $wife_name['full'],
							// No need for a fullNN entry - we do not currently store FAM names in the database
						];
					}
				}
			}

			// Add the unmatched names second (there may be no matched names)
			foreach ($husb_names as $husb_name) {
				foreach ($wife_names as $wife_name) {
					if ($husb_name['script'] != $wife_name['script']) {
						$this->_getAllNames[] = [
							'type' => $husb_name['type'],
							'sort' => $husb_name['sort'] . ' + ' . $wife_name['sort'],
							'full' => $husb_name['full'] . ' + ' . $wife_name['full'],
							// No need for a fullNN entry - we do not currently store FAM names in the database
						];
					}
				}
			}
		}

		return $this->_getAllNames;
	}

	/**
	 * This function should be redefined in derived classes to show any major
	 * identifying characteristics of this record.
	 *
	 * @return string
	 */
	public function formatListDetails() {
		return
			$this->formatFirstMajorFact(WT_EVENTS_MARR, 1) .
			$this->formatFirstMajorFact(WT_EVENTS_DIV, 1);
	}
}