<?php

declare(strict_types=1);

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

/**
 * @property int $id
 * @property int $user_id
 * @property string $message
 * @property string|null $response
 * @property string|null $provider
 * @property string|null $model
 * @property int $input_tokens
 * @property int $output_tokens
 * @property \Illuminate\Support\Carbon|null $sent_at
 * @property \Illuminate\Support\Carbon|null $created_at
 * @property \Illuminate\Support\Carbon|null $updated_at
 * @property-read User $user
 */
class ChatMessage extends Model
{
    /** @var array<int, string> */
    protected $fillable = [
        'user_id',
        'message',
        'response',
        'provider',
        'model',
        'input_tokens',
        'output_tokens',
        'sent_at',
    ];

    /** @var array<string, string> */
    protected $casts = [
        'input_tokens' => 'integer',
        'output_tokens' => 'integer',
        'sent_at' => 'datetime',
    ];

    /**
     * Get the user that owns the chat message.
     */
    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }
}