<?php

namespace App\Models;

use Illuminate\Support\Facades\File;
use Illuminate\Support\Facades\Storage;
use MongoDB\Laravel\Eloquent\Model;
use MongoDB\Laravel\Eloquent\SoftDeletes;
use MongoDB\Laravel\Relations\BelongsTo;
use MongoDB\Laravel\Relations\BelongsToMany;
use MongoDB\Laravel\Relations\HasMany;
use Overtrue\LaravelFavorite\Traits\Favoriteable;
use Symfony\Component\HttpFoundation\StreamedResponse;

class Post extends Model
{
	use SoftDeletes, Favoriteable;

    protected $fillable = [ 'rating', 'extension', 'featured' ];

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

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

	public function comments(): HasMany
	{
		return $this->hasMany(Comment::class);
	}

	protected function toBase64(string $path): string
	{
		$ext = $this->extension;
		$file = Storage::get($path);
		$data = base64_encode($file);
		return "data:image/$ext;base64,$data";
	}

	public function getThumbUrl(): ?string
	{
		if (Storage::has("posts/$this->id/thumb"))
		{
			return $this->toBase64("posts/$this->id/thumb");
		}
		return $this->getPreviewUrl();
	}

	public function getPreviewUrl(): ?string
	{
		if (Storage::has("posts/$this->id/preview"))
		{
			return $this->toBase64("posts/$this->id/preview");
		}
		return $this->getFullUrl();
	}

	public function getFullUrl(): ?string
	{
		if (Storage::has("posts/$this->id/full"))
		{
			return $this->toBase64("posts/$this->id/full");
		}
		abort(404);
	}

	public function getMimeType(): ?string
	{
		return Storage::mimeType("posts/$this->id/full");
	}

	public function getDimensions(): false|array
	{
		return getimagesize($this->getFullUrl());
	}

	public function getDimensionsStr(): string
	{
		[$width, $height] = $this->getDimensions();
		return "$width x $height";
	}

	public function getFileSize(): int
	{
		return Storage::size("posts/$this->id/full");
	}

	public function getAspectRatio(): string
	{
		list($width, $height) = $this->getDimensions();
		$divisor = gmp_intval(gmp_gcd($width, $height));
		$w = $width / $divisor;
		$h = $height / $divisor;
		return "aspect-ratio: $w/$h;";
	}

	public function download(): StreamedResponse
	{
		return Storage::download("posts/$this->id/full");
	}

	public function getNextPost(): ?Post
	{
		return Post::where('created_at', '>', $this->created_at)
			->orderBy('created_at', 'asc')
			->first();
	}

	public function getPreviousPost(): ?Post
	{
		return Post::where('created_at', '<', $this->created_at)
			->orderBy('created_at', 'desc')
			->first();
	}

	public function getRatingColor(): string
	{
		return match ($this->rating)
		{
			'safe'			=> 'success',
			'suggestive'	=> 'warning',
			'explicit'		=> 'danger',
			default 		=> 'default',
		};
	}
}