<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Support\Str;

class ChatSession extends Model
{
    protected $fillable = [
        'session_token',
        'user_id',
        'category_id',
        'ip_address',
        'user_agent',
        'last_activity_at',
    ];

    protected $casts = [
        'last_activity_at' => 'datetime',
    ];

    // Auto-generate session token
    protected static function booted(): void
    {
        static::creating(function (ChatSession $session) {
            if (empty($session->session_token)) {
                $session->session_token = Str::random(48);
            }
        });
    }

    // === Relationships ===

    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    public function category(): BelongsTo
    {
        return $this->belongsTo(Category::class);
    }

    public function logs(): HasMany
    {
        return $this->hasMany(ChatLog::class)->orderBy('created_at');
    }

    // === Helpers ===

    public function touch($attribute = null): bool
    {
        return $this->update(['last_activity_at' => now()]);
    }
}