<?php

namespace App\Models;

use Carbon\Carbon;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;

class Coupon extends Model
{
    // FIXME : Ajouter les mouvement de quantité, mettre juste une colonne et se servir des logs avec un type pour mouvement ?
    // FIXME : Ajouter logs impressions.
    use HasFactory;

    /**
     * The attributes that should be cast.
     *
     * @var array
     */
    protected $casts = [
        'start_diffusion_date' => 'date:Y-m-d',
        'end_diffusion_date' => 'date:Y-m-d',
        'end_validity_date' => 'date:Y-m-d',
    ];

    /**
     * Get campaigns that owns the Coupon
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
     */
    public function campaigns(): BelongsToMany
    {
        return $this->belongsToMany(Campaign::class);
    }

    /**
     * The "booted" method of the model.
     *
     * @return void
     */
    protected static function booted(): void
    {
        static::creating(function (Coupon $coupon) {
            $coupon->can_be_used = self::checkIfCanBeUsed($coupon);
        });
        static::updating(function (Coupon $coupon) {
            $coupon->can_be_used = self::checkIfCanBeUsed($coupon);
        });
    }

    /**
     * Check if coupon can be used taking account multiple factors
     *
     * @param \App\Models\Coupon $coupon
     * @return boolean
     */
    public static function checkIfCanBeUsed(Coupon $coupon): bool
    {
        if (
            (
                is_null($coupon->start_diffusion_date) or
                $coupon->start_diffusion_date->lessThanOrEqualTo(Carbon::now())
            ) and
            (
                is_null($coupon->end_diffusion_date) or
                $coupon->end_diffusion_date->greaterThanOrEqualTo(Carbon::now())) and
            (is_null($coupon->end_validity_date) or
                $coupon->end_validity_date->greaterThanOrEqualTo(Carbon::now()->addDays($coupon->validity_period))
            )
        ) {
            return true;
        }
        // FIXME : Ajouter calendrier de diffusion et le prendre en compte dans la condition.
        return false;
    }
}