<?php

namespace App\Models;

use App\Lib\Helpers\ToolboxHelper;
use Carbon\Carbon;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Str;
use Illuminate\Validation\ValidationException;

class Slider extends Model
{
    use HasFactory;

    /**
     * The attributes that are mass assignable.
     *
     * @var string[]
     */
    protected $fillable = [
        'label'
    ];

    /**
     * Perform any actions required after the model boots.
     *
     * @return void
     */
    protected static function booted()
    {
        // * EVENT CLOSURES.
        static::creating(function (self $model) {
            // * ASSERTIONS
            static::assertTitleIsUnique($model->label);
            // * TRANSFORMATIONS
            $model->slug = Str::slug($model->label);
        });
        static::updating(function (self $model) {
            // * ASSERTIONS
            static::assertTitleIsUnique($model->label, $model->id);
            // * TRANSFORMATIONS
            $model->slug = Str::slug($model->label);
        });
        static::deleting(function (self $model) {
            if ($model->slides()->count()) {
                throw ValidationException::withMessages([
                    'Impossible de supprimer le slider car des slides y sont associés'
                ]);
            }
        });
    }

    // * RELATIONSHIPS

    /**
     * hasMany slides relation
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function slides()
    {
        return $this->hasMany(Slide::class, 'slider_id')->orderBy('order', 'ASC');
    }

    // * METHODS

    /**
     * Asserts using validation that the label is unique
     *
     * @param mixed        $label
     * @param integer|null $id
     * @return void
     * @throws \Illuminate\Validation\ValidationException If an actu title already exists.
     */
    private static function assertTitleIsUnique($label, ?int $id = null)
    {
        $table = (new self())->getTable();
        ToolboxHelper::assertFieldIsUnique($table, 'label', $label, $id);
        ToolboxHelper::assertFieldIsUnique($table, 'slug', Str::slug($label), $id);
    }

    /**
     * Getter showable_slides filtered slides relation by showable date
     *
     * @return \Illuminate\Database\Eloquent\Collection<\App\Models\Slide>
     */
    public function getShowableSlidesAttribute()
    {
        $now = Carbon::now();
        return $this->slides()->where(function ($q) use ($now) {
            $q->whereDate('publish_at', '<=', $now)
            ->orWhereNull('publish_at');
        })->where(function ($q) use ($now) {
            $q->whereDate('unpublish_at', '>=', $now)
            ->orWhereNull('unpublish_at');
        })->orderBy('order', 'ASC')->get();
    }
}