<?php

declare(strict_types=1);

/*
 * This file is a part of the Dragon-Knight project.
 *
 * Copyright (c) 2024-present Sharkk
 *
 * This file is subject to the MIT license that is bundled
 * with this source code in the LICENSE.md file.
 */

namespace DragonKnight\Models;

use function DragonKnight\db;

class Model
{
    protected string $table_name = '';
    protected array $original_data = [];
    protected array $changes = [];

    public function __construct(array $data)
    {
        $this->original_data = $data;
        $this->changes = [];
    }

    public function __get(string $key): mixed
    {
        return array_key_exists($key, $this->changes) ? $this->changes[$key] : $this->original_data[$key] ?? false;
    }

    public function __set(string $key, mixed $value): void
    {
        if (array_key_exists($key, $this->original_data)) {
            if ($value !== $this->original_data[$key]) {
                $this->changes[$key] = $value;
            }
        } else {
            throw new \InvalidArgumentException("Attempted to write to $key, which doesn't exist in the data for this model.");
        }
    }

    public function save(): bool
    {
        if (empty($this->changes)) {
            return true;
        }

        $placeholders = [];
        $values = [];
        foreach ($this->changes as $key => $value) {
            $placeholders[] = "$key=?";
            $values[] = $value;
        }

        $values[] = $this->id;
        $query = 'UPDATE '.$this->table_name.' SET '.implode(', ', $placeholders).' WHERE id = ?;';

        $result = db()->query($query, $values);

        return $result === false ? false : true;
    }
}