<?php

declare(strict_types=1);

namespace App\Models;

use CodeIgniter\Model;

final class ApiKeyModel extends Model
{
    protected $table         = 'api_keys';
    protected $primaryKey    = 'id';
    protected $returnType    = 'array';
    protected $useTimestamps = true;
    protected $allowedFields = [
        'name', 'key_hash', 'key_prefix', 'rate_limit_per_hour',
        'request_count', 'is_active', 'last_used_at',
    ];

    public function findByPlainKey(string $plain): ?array
    {
        $hash = hash('sha256', $plain);
        $key  = $this->where('key_hash', $hash)->where('is_active', 1)->first();
        if ($key !== null) {
            $this->update((int) $key['id'], [
                'request_count' => (int) $key['request_count'] + 1,
                'last_used_at'  => date('Y-m-d H:i:s'),
            ]);
        }

        return $key;
    }

    /** Creates a key and returns [row, plaintext] — plaintext shown exactly once. */
    public function issue(string $name, int $ratePerHour = 120): array
    {
        helper('text');
        $plain = 'tv_live_' . bin2hex(random_bytes(20));
        $row   = [
            'name'                => $name,
            'key_hash'            => hash('sha256', $plain),
            'key_prefix'          => substr($plain, 0, 12),
            'rate_limit_per_hour' => $ratePerHour,
            'is_active'           => 1,
        ];
        $this->insert($row);

        return [$row, $plain];
    }
}