<?php

namespace App\Models;

use App\Observers\PostObserver;
use Carbon\Carbon;
use Illuminate\Database\Eloquent\Attributes\ObservedBy;
use Illuminate\Database\Eloquent\Casts\Attribute;
use Illuminate\Database\Eloquent\Model;

#[ObservedBy(PostObserver::class)]
class Post extends Model
{
    protected $table = 'posts';

    // Instagram's own post pk is the primary key, not auto-increment
    protected $keyType = 'string';

    public $incrementing = false;

    // scraped_at is set by the DB default; created_at/updated_at don't apply
    public $timestamps = false;

    protected $fillable = [
        'id',
        'code',
        'username',
        'full_name',
        'caption',
        'accessibility_caption',
        'is_video',
        'is_carousel',
        'like_count',
        'comment_count',
        'taken_at',
        'image_url',
        'video_url',
        'carousel_images',
        'scraped_at',
        'profile_pic_url',
    ];

    protected $casts = [
        'is_video' => 'boolean',
        'is_carousel' => 'boolean',
        'like_count' => 'integer',
        'comment_count' => 'integer',
        'taken_at' => 'integer',
        'carousel_images' => 'array',
        'scraped_at' => 'datetime',
        'taken_at_date' => 'datetime',
        'permalink' => 'string',
    ];

    protected $appends = [
        'permalink',
        'taken_at_date',
    ];

    /**
     * Instagram's taken_at is a unix timestamp - convenience accessor
     * for an actual Carbon instance.
     */
    protected function takenAtDate(): Attribute
    {
        return Attribute::make(
            get: fn () => $this->taken_at ? Carbon::createFromTimestamp($this->taken_at) : null,
        );
    }

    /**
     * Convenience: the actual instagram.com URL for this post.
     */
    protected function permalink(): Attribute
    {
        return Attribute::make(
            get: fn () => $this->code ? "https://www.instagram.com/p/{$this->code}/" : null,
        );
    }
}