<?php
require_once 'core.php';
require_once 'db.php';
require_once 'user.php';
require_once 'post.php';

class Space
{
    private int $spaceId;
    private string $name;
    private string $description;
    private array $members;
    private array $posts;
    private ?Space $parent;

    public function __construct(?int $spaceId, string $name, string $description, array $members, $posts, ?Space $parent = null)
    {
        $this->spaceId = $spaceId ?? randomId(2);
        $this->name = $name;
        $this->description = $description;
        $this->members = $members;
        $this->posts[] = $posts;
        $this->parent = $parent;

        /* $stmt = 'INSERT INTO spaces (spaceId, name, description, parentSpaceIdk)'; */
    }

    public static function retrieveFromDB(int $space, ?int $user): ?Space
    {
        if ($user) {
            $stmt = 'SELECT * FROM spaceMembers WHERE space = ? AND user = ?';
            $isMember = exec_stmt($stmt, 'ii', $space, $user)->fetch_assoc();
            if (!$isMember)
                return null;
        } else {
            $stmt = 'SELECT visibility FROM space WHERE id = ?';
            $isOpen = exec_stmt($stmt, 'i', $space);
            if (!$isOpen)
                return null;
        }

        $stmt = 'SELECT * FROM space WHERE id = ?';
        $space = exec_stmt($stmt, 'i', $space)->fetch_assoc();

        if (!empty($space['parentSpace']))
            $parent = Space::retrieveFromDB($space['parentSpace'], $user);
        else
            $parent = null;

        $stmt = 'SELECT user FROM spaceMembers WHERE space = ?';
        $members = exec_stmt($stmt, 'i', $space)->fetch_assoc();

        $stmt = 'SELECT post FROM spacePosts WHERE space = ?';
        $posts = exec_stmt($stmt, 'i', $space)->fetch_assoc();

        return new Space($space['id'], $space['name'], $space['description'], $members, $posts, $parent);
    }

    public function __toString()
    {
        echo 'todo: this should be JSON';
    }

    public function getId(): int
    {
        return $this->spaceId;
    }

    public function getName(): string
    {
        return $this->name;
    }

    public function getDescription(): string
    {
        return $this->description;
    }
}