<?php

namespace App\Http\Resources;

use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;
use Illuminate\Support\Str;

/** @mixin \App\Models\ChatSession */
class ChatSessionResource extends JsonResource
{
    /**
     * @return array<string, mixed>
     */
    public function toArray(Request $request): array
    {
        $preview = $this->last_message_content ?? '';

        return [
            'session_id' => $this->session_id,
            'session_name' => $this->session_name,
            'status' => $this->status,
            'last_seq' => $this->last_seq,
            'created_at' => $this->created_at,
            'updated_at' => $this->updated_at,
            'last_message_at' => $this->last_message_at,
            'last_message_preview' => $preview ? Str::limit($preview, 120) : '',
            'last_message_role' => $this->last_message_role,
            'last_message_type' => $this->last_message_type,
        ];
    }
}