<?php

namespace ACP\Editing\Service;

use AC\Helper;
use ACP\Editing\Service;
use ACP\Editing\Storage;
use ACP\Editing\View;

class SerializedMeta implements Service, Editability
{

    private Storage $storage;

    private array $keys;

    public function __construct(Storage $storage, array $keys)
    {
        $this->storage = $storage;
        $this->keys = $keys;
    }

    public function get_view(string $context): ?View
    {
        return new View\Text();
    }

    public function is_editable(int $id): bool
    {
        $value = $this->storage->get($id);

        if (is_array($value)) {
            $value = Helper\Arrays::create()->get_nested_value($value, $this->keys);
        }

        return ! ($value && ! is_scalar($value));
    }

    public function get_not_editable_reason(int $id): string
    {
        return __('Data must be `scalar`.', 'codepress-admin-columns');
    }

    public function get_value(int $id)
    {
        $value = $this->storage->get($id);

        if ($value && is_array($value)) {
            $value = Helper\Arrays::create()->get_nested_value($value, $this->keys);
        }

        return $value ?: false;
    }

    private function is_integer($string): bool
    {
        return (string)(int)$string === $string;
    }

    private function maybe_cast_value($value)
    {
        if ($this->is_integer($value)) {
            $value = (int)$value;
        }

        return $value;
    }

    public function update(int $id, $data): void
    {
        $values = Helper\Arrays::create()->add_nested_value(
            $this->keys,
            $this->maybe_cast_value($data),
            $this->storage->get($id) ?: []
        );

        $this->storage->update($id, $values);
    }

}