<?php

namespace App\Models;

use App\Models\Traits\BelongsToUser;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Database\Eloquent\Relations\MorphMany;
use Illuminate\Database\Eloquent\SoftDeletes;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;

class Dynamic extends Model
{
    use SoftDeletes;
    use BelongsToUser;

    protected $casts = [
        'pictures' => 'json',
    ];

    public function getPicturesUrlAttribute(): array
    {
        $pictures = $this->getAttribute('pictures');

        if (empty($pictures)) {
            return [];
        }

        return collect($pictures)->map(function ($picture) {
            return $this->parseImageUrl($picture);
        })->toArray();
    }

    /**
     * Notes   : 解析图片文件的实际展示地址
     *
     * @Date   : 2021/3/16 4:53 下午
     * @Author : < Jason.C >
     * @param  string|null  $image
     * @return string
     */
    protected function parseImageUrl(?string $image): string
    {
        if (empty($image)) {
            return '';
        } elseif (Str::startsWith($image, 'http')) {
            return $image;
        } else {
            return Storage::url($image);
        }
    }

    public function isLikedBy(User $user): bool
    {
        if ($this->relationLoaded('likers')) {
            return $this->likers->contains($user);
        }
        $likes = $this->likers()->where('user_id', $user->getKey())->first();
        return (bool) $likes;
    }

    /**
     * Notes   : 点赞用户
     *
     * @Date   : 2021/4/23 4:12 下午
     * @Author : < Jason.C >
     * @return BelongsToMany
     */
    public function likers(): BelongsToMany
    {
        return $this->belongsToMany(
            User::class,
            'likes',
            'likeable_id',
            'user_id'
        )->where('likeable_type', $this->getMorphClass());
    }

    /**
     * Notes   : 是否被某人评论过了
     *
     * @Date   : 2021/4/16 3:44 下午
     * @Author : < Jason.C >
     * @param  Model  $user
     * @return bool
     */
    public function isCommentedBy(Model $user): bool
    {
        if ($this->relationLoaded('commenters')) {
            return $this->commenters->contains($user);
        }

        return $this->comments()->where('user_id', $user->getKey())->exists();
    }

    /**
     * Notes   : 评论记录
     *
     * @Date   : 2021/4/16 3:44 下午
     * @Author : < Jason.C >
     * @return MorphMany
     */
    public function comments(): MorphMany
    {
        return $this->morphMany(Comment::class, 'commentable');
    }

    /**
     * Notes   : 评论用户
     *
     * @Date   : 2021/4/23 4:12 下午
     * @Author : < Jason.C >
     * @return BelongsToMany
     */
    public function commenters(): BelongsToMany
    {
        return $this->belongsToMany(
            User::class,
            'comments',
            'commentable_id',
            'user_id'
        )->where('commentable_type', $this->getMorphClass());
    }
}