<?php

declare(strict_types=1);

namespace App\Models;

use App\Enums\MessageType;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

/**
 * @property int $id
 * @property int $user_id
 * @property int $subject_id
 * @property string $content
 * @property string $type
 * @property array|null $metadata
 * @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
 * @property-read Subject $subject
 */
class Insight extends Model
{
    /** @var array<int, string> */
    protected $fillable = [
        'user_id',
        'subject_id',
        'content',
        'type',
        'metadata',
        'input_tokens',
        'output_tokens',
        'sent_at',
    ];

    /** @var array<string, string> */
    protected $casts = [
        'metadata' => 'array',
        'sent_at' => 'datetime',
        'type' => MessageType::class,
    ];

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

    /**
     * Get the subject associated with the insight.
     */
    public function subject(): BelongsTo
    {
        return $this->belongsTo(Subject::class);
    }
}