<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2019 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/>.
 */
declare(strict_types=1);

namespace Fisharebest\Webtrees;

use Fisharebest\Webtrees\Module\ModuleInterface;
use Fisharebest\Webtrees\Module\ModuleListInterface;
use Fisharebest\Webtrees\Module\PlaceHierarchyListModule;
use Fisharebest\Webtrees\Services\ModuleService;
use Illuminate\Database\Capsule\Manager as DB;
use Illuminate\Support\Collection;

/**
 * A GEDCOM place (PLAC) object.
 */
class Place
{
    /** @var string e.g. "Westminster, London, England" */
    private $place_name;

    /** @var Collection|string[] The parts of a place name, e.g. ["Westminster", "London", "England"] */
    private $parts;

    /** @var Tree We may have the same place name in different trees. */
    private $tree;

    /**
     * Create a place.
     *
     * @param string $place_name
     * @param Tree   $tree
     */
    public function __construct(string $place_name, Tree $tree)
    {
        // Ignore any empty parts in place names such as "Village, , , Country".
        $this->parts = Collection::make(preg_split(Gedcom::PLACE_SEPARATOR_REGEX, $place_name))
            ->filter();

        // Rebuild the placename in the correct format.
        $this->place_name = $this->parts->implode(Gedcom::PLACE_SEPARATOR);

        $this->tree = $tree;
    }

    /**
     * Get the higher level place.
     *
     * @return Place
     */
    public function parent(): Place
    {
        return new self($this->parts->slice(1)->implode(Gedcom::PLACE_SEPARATOR), $this->tree);
    }

    /**
     * The database row that contains this place.
     * Note that due to database collation, both "Quebec" and "Québec" will share the same row.
     *
     * @return int
     */
    public function id(): int
    {
        return app('cache.array')->rememberForever(__CLASS__ . __METHOD__ . $this->place_name, function () {
            // The "top-level" place won't exist in the database.
            if ($this->parts->isEmpty()) {
                return 0;
            }

            $parent_place_id = $this->parent()->id();

            $place_id = (int) DB::table('places')
                ->where('p_file', '=', $this->tree->id())
                ->where('p_place', '=', $this->parts->first())
                ->where('p_parent_id', '=', $parent_place_id)
                ->value('p_id');

            if ($place_id === 0) {
                $place = $this->parts->first();

                DB::table('places')->insert([
                    'p_file'        => $this->tree->id(),
                    'p_place'       => $place,
                    'p_parent_id'   => $parent_place_id,
                    'p_std_soundex' => Soundex::russell($place),
                    'p_dm_soundex'  => Soundex::daitchMokotoff($place),
                ]);

                $place_id = (int) DB::connection()->getPdo()->lastInsertId();
            }

            return $place_id;
        });
    }

    /**
     * Extract the locality (first parts) of a place name.
     *
     * @param int $n
     *
     * @return Collection
     */
    public function firstParts(int $n): Collection
    {
        return $this->parts->slice(0, $n);
    }

    /**
     * Extract the country (last parts) of a place name.
     *
     * @param int $n
     *
     * @return Collection
     */
    public function lastParts(int $n): Collection
    {
        return $this->parts->slice(-$n);
    }

    /**
     * Get the lower level places.
     *
     * @return Place[]
     */
    public function getChildPlaces(): array
    {
        if ($this->place_name !== '') {
            $parent_text = Gedcom::PLACE_SEPARATOR . $this->place_name;
        } else {
            $parent_text = '';
        }

        return DB::table('places')
            ->where('p_file', '=', $this->tree->id())
            ->where('p_parent_id', '=', $this->id())
            ->orderBy(DB::raw('p_place /*! COLLATE ' . I18N::collation() . ' */'))
            ->pluck('p_place')
            ->map(function (string $place) use ($parent_text): Place {
                return new self($place . $parent_text, $this->tree);
            })
            ->all();
    }

    /**
     * Create a URL to the place-hierarchy page.
     *
     * @return string
     */
    public function url(): string
    {
        //find a module providing the place hierarchy
        $module = app(ModuleService::class)->findByComponent(ModuleListInterface::class, $this->tree, Auth::user())->first(function (ModuleInterface $module) {
            return $module instanceof PlaceHierarchyListModule;
        });
        
        if ($module instanceof PlaceHierarchyListModule) {
            return $module->listUrl($this->tree, [
                'parent' => $this->parts->reverse()->all(),
                'ged'    => $this->tree->name(),
            ]);
        } else {
            //TODO: should we be allowed to return null here?
            return \Fisharebest\Webtrees\Html::url('index.php', []);
        }
    }

    /**
     * Format this place for GEDCOM data.
     *
     * @return string
     */
    public function gedcomName(): string
    {
        return $this->place_name;
    }

    /**
     * Format this place for display on screen.
     *
     * @return string
     */
    public function placeName(): string
    {
        $place_name = $this->parts->first() ?? I18N::translate('unknown');

        return '<span dir="auto">' . e($place_name) . '</span>';
    }

    /**
     * Generate the place name for display, including the full hierarchy.
     *
     * @param bool $link
     *
     * @return string
     */
    public function fullName(bool $link = false)
    {
        if ($this->parts->isEmpty()) {
            return '';
        }

        $full_name = $this->parts->implode(I18N::$list_separator);

        if ($link) {
            return '<a dir="auto" href="' . e($this->url()) . '">' . e($full_name) . '</a>';
        }

        return '<span dir="auto">' . e($full_name) . '</span>';
    }

    /**
     * For lists and charts, where the full name won’t fit.
     *
     * @param bool $link
     *
     * @return string
     */
    public function shortName(bool $link = false)
    {
        $SHOW_PEDIGREE_PLACES = (int) $this->tree->getPreference('SHOW_PEDIGREE_PLACES');

        // Abbreviate the place name, for lists
        if ($this->tree->getPreference('SHOW_PEDIGREE_PLACES_SUFFIX')) {
            $parts = $this->lastParts($SHOW_PEDIGREE_PLACES);
        } else {
            $parts = $this->firstParts($SHOW_PEDIGREE_PLACES);
        }

        $short_name = $parts->implode(I18N::$list_separator);

        // Add a tool-tip showing the full name
        $title = strip_tags($this->fullName());

        if ($link) {
            return '<a dir="auto" href="' . e($this->url()) . '" title="' . $title . '"">' . e($short_name) . '</a>';
        }

        return '<span dir="auto">' . e($short_name) . '</span>';
    }
}