<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Support\Str;

class Post extends Model
{
    use HasFactory;

    protected $fillable = [
        'user_id',
        'category_id',
        'title',
        'slug',
        'excerpt',
        'content',
        'cover_image',
        'gallery',
        'status',
        'published_at',
        'is_featured',
        'views_count',
        'likes_count',
    ];

    protected $casts = [
        'gallery' => 'array',
        'published_at' => 'datetime',
        'is_featured' => 'boolean',
    ];

    protected static function boot()
    {
        parent::boot();

        static::creating(function ($post) {
            if (empty($post->slug)) {
                $post->slug = Str::slug($post->title);
            }
            if (empty($post->user_id)) {
                $post->user_id = auth()->id();
            }
        });
    }

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

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

    public function tags(): BelongsToMany
    {
        return $this->belongsToMany(Tag::class)->withTimestamps();
    }

    public function scopePublished($query)
    {
        return $query->where('status', 'published')
            ->where('published_at', '<=', now());
    }

    public function scopeFeatured($query)
    {
        return $query->where('is_featured', true);
    }

    public function scopeLatest($query)
    {
        return $query->orderBy('published_at', 'desc');
    }

    public function isPublished(): bool
    {
        return $this->status === 'published' && $this->published_at <= now();
    }

    public function getReadingTimeAttribute(): int
    {
        $wordCount = str_word_count(strip_tags($this->content));
        return max(1, ceil($wordCount / 200));
    }

    public function incrementViews(): void
    {
        $this->increment('views_count');
    }

    public function getFirstGalleryImageAttribute(): ?string
    {
        if (!empty($this->gallery) && is_array($this->gallery)) {
            return $this->gallery[0] ?? null;
        }
        return null;
    }

    public function getDisplayImageAttribute(): ?string
    {
        return $this->cover_image ?? $this->first_gallery_image;
    }
}