<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\ModelNotFoundException;

class Customer extends Model
{
    use HasFactory;

    public const FIRST_OR_NULL = 0;
    public const FIRST_OR_NEW  = 1;
    public const FIRST_OR_FAIL = 2;

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

    // * RELATIONS

    /**
     * CustomerInfo hasMany relation
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function infos()
    {
        return $this->hasMany(CustomerInfo::class);
    }

    /**
     * CustomerLogin hasMany relation
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function logins()
    {
        return $this->hasMany(CustomerLogin::class);
    }

    /**
     * CustomerOptInHistory hasMany relation
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function optInHistory()
    {
        return $this->hasMany(CustomerOptInHistory::class);
    }

    /**
     * Customer Brand belongsToMany relation
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
     */
    public function brands()
    {
        return $this->belongsToMany(Brand::class, CustomerInfo::class);
    }

    /**
     * Answers belongsToMany relation
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
     */
    public function answers()
    {
        return $this->belongsToMany(Answer::class, 'customer_answer');
    }

    // * METHODS

    /**
     * Get the CustomerInfo from a specific brand
     * or create a New one if $firstOrNewOrFail is 1
     * throw model not found exception if firstOrNewOrFail = 2
     *
     * @param \App\Models\Brand $brand
     * @param integer           $firstOrNewOrFail
     * @return \Illuminate\Database\Eloquent\Builder
     */
    public function info(Brand $brand, int $firstOrNewOrFail = self::FIRST_OR_NULL): ?CustomerInfo
    {
        if (isset($this->relations['infos'])) {
            /** @var \App\Models\CustomerInfo $info */
            foreach ($this->relations['infos'] as $info) {
                if ($info->brand_id === $brand->id) {
                    return $info;
                }
            }
        }
        $query = CustomerInfo::query()->whereHas('brand', function (Builder $q) use ($brand) {
            $q->where('id', $brand->id);
        })->whereHas('customer', function (Builder $q) {
            $q->where('id', $this->id);
        });
        if ($firstOrNewOrFail === self::FIRST_OR_NEW) {
            return $query->firstOrNew();
        }
        if ($firstOrNewOrFail === self::FIRST_OR_FAIL) {
            return $query->firstOrFail();
        }
        return $query->first();
    }

    /**
     * Get the CustomerLogin from a specific brand
     * or create a New one if $firstOrNewOrFail is 1
     * throw model not found exception if firstOrNewOrFail = 2
     *
     * @param \App\Models\Brand $brand
     * @param integer           $firstOrNewOrFail
     * @return \Illuminate\Database\Eloquent\Builder
     */
    public function login(Brand $brand, int $firstOrNewOrFail = self::FIRST_OR_NULL): ?CustomerLogin
    {
        if (isset($this->relations['logins'])) {
            /** @var \App\Models\CustomerLogin $login */
            foreach ($this->relations['logins'] as $login) {
                if ($login->brand_id === $brand->id) {
                    return $login;
                }
            }
        }
        $query = CustomerLogin::query()->whereHas('brand', function (Builder $q) use ($brand) {
            $q->where('id', $brand->id);
        })->whereHas('customer', function (Builder $q) {
            $q->where('id', $this->id);
        });
        if ($firstOrNewOrFail === self::FIRST_OR_NEW) {
            return $query->firstOrNew();
        }
        if ($firstOrNewOrFail === self::FIRST_OR_FAIL) {
            return $query->firstOrFail();
        }
        return $query->first();
    }

    /**
     * Load login and info for this customer and this specific brand.
     *
     * @param \App\Models\Brand $brand
     * @param boolean           $orFail
     * @return self
     * @throws ModelNotFoundException If no login or info was found for the brand.
     */
    public function loadBrandData(Brand $brand, bool $orFail = false): self
    {
        $this->load([
            'logins' => function ($q) use ($brand) {
                $q->where('brand_id', $brand->id);
            },
            'infos' => function ($q) use ($brand) {
                $q->where('brand_id', $brand->id);
            }
        ]);
        if ($orFail and !isset($this->relations['logins'][0])) {
            throw (new ModelNotFoundException())->setModel(CustomerLogin::class);
        }
        if ($orFail and !isset($this->relations['infos'][0])) {
            throw (new ModelNotFoundException())->setModel(CustomerInfo::class);
        }
        return $this;
    }

    /**
     * Set this customer as optin
     *
     * @param \App\Models\Brand $brand
     * @param boolean           $optIn
     * @return void
     * @throws \Throwable If customer history update failed.
     */
    public function setOptIn(Brand $brand, bool $optIn): void
    {
        $this->opt_in = $optIn;

        // * Ajout dans la table d'historique des opt-in de la nouvelle valeur.
        $optInHistory            = new CustomerOptInHistory();
        $optInHistory->new_value = $optIn;
        $optInHistory->customer()->associate($this);
        $optInHistory->brand()->associate($brand);
        $optInHistory->saveOrFail();
    }

    /**
     * Get All answers given by this customer
     * for a specific service
     *
     * @param \App\Models\Service $service
     * @return \Illuminate\Database\Eloquent\Collection
     */
    public function getAnswers(Service $service): Collection
    {
        return Answer::query()->whereHas('customers', function (Builder $q) {
            $q->where('id', $this->id);
        })->whereHas('question', function (Builder $q) use ($service) {
            $q->whereHas('brand', function (Builder $q) use ($service) {
                $q->where('id', $service->brand->id);
            });
        })->get();
    }
}