<?php

namespace App\Auth;

use App\Models\Customer;
use Illuminate\Auth\EloquentUserProvider;
use Illuminate\Contracts\Auth\Authenticatable as UserContract;
use Illuminate\Contracts\Auth\UserProvider as UserProviderContract;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Facades\Log;
use LDC\LDCCRM\Enums\ApiError;
use LDC\LDCCRM\Exceptions\ApiErrorException;
use LDC\LDCCRM\Exceptions\CrmException;

/**
 * Crm user provider to integrate nicely with Laravel
 */
class CrmUserProvider extends EloquentUserProvider implements UserProviderContract
{
    /**
     * The model to use, specified in auth config guard.
     * @var string
     */
    private $usedModel = Customer::class;

    /**
     * Retrieve a user by the given credentials.
     *
     * @param  array $credentials
     * @return \Illuminate\Contracts\Auth\Authenticatable|null
     */
    public function retrieveByCredentials(array $credentials)
    {
        // * Let laravel find a model
        $model = parent::retrieveByCredentials($credentials);

        try {
            /** @var \LDC\LDCCRM\CrmApiV2 */
            $crm = app('crmAPI');

            // Si pas de compte local.
            if (!$model) {
                $crmCustomer = $crm->getCustomer($credentials['email']);

                if (!$crmCustomer) {
                    // * Customer is not found on CRM.
                    return null;
                }
                $model = $this->createLocalCustomer($crmCustomer);
            }

            return $model;
        } catch (ApiErrorException $e) {
            // * Customer is not found.
            if ($e->getApiError()->equals(ApiError::modelNotFound())) {
                return null;
            }
            report($e);
            Log::error('Unhandled response ', $e->getApiError()->label);
        } catch (CrmException | \Exception $e) {
            report($e);
            // Une erreur critique est survenue avec la CRM.
            return null;
        } //end try
        Log::error(__CLASS__ . '::retrieveByCredentials reached end of possibilities.');
        return null;
    }

    /**
     * Validate a user against the given credentials.
     *
     * @param UserContract $model
     * @param array        $credentials
     * @return boolean
     * @throws \RuntimeException If model provided is not a Customer or connection to server fails.
     * @throws \LDC\LDCCRM\Exceptions\CrmException On CRM call error.
     * @throws \Exception On CRM call error.
     */
    public function validateCredentials(UserContract $model, array $credentials)
    {
        // FIXME: handle customerNotActivated
        /** @var \Illuminate\Database\Eloquent\Model $model */
        if (\get_class($model) !== $this->usedModel) {
            throw new \RuntimeException('Cannot authenticate any thing else than ' . $this->usedModel);
        }

        try {
            /** @var \LDC\LDCCRM\CrmApiV2 */
            $crm = app('crmAPI');

            // * Ne devrait pas survenir, $crm->login throws ApiError::authFailed()
            return $crm->login($credentials['email'], $credentials['password']);
        } catch (ApiErrorException $e) {
            if ($e->getApiError()->equals(ApiError::authFailed())) {
                return false;
            }
        } catch (CrmException | \Exception $e) {
            report($e);
            if (config('app.debug')) {
                throw $e;
            }
            return false;
        } //end try

        Log::error(__CLASS__ . '::validateCredentials reached end of possibilities.');
        return null;
    }

    /**
     * Create a local customer
     *
     * @param \LDC\LDCCRM\Models\Customer $crmCustomer
     * @return \Illuminate\Database\Eloquent\Model
     * @throws \Throwable If saving to DB failed.
     */
    private function createLocalCustomer(\LDC\LDCCRM\Models\Customer $crmCustomer): Model
    {
        /** @var \Illuminate\Database\Eloquent\Model $model */
        $model           = $this->usedModel::firstOrNew([
            'email' => $crmCustomer->email
        ]);
        $model->hashcode = $crmCustomer->hashcode;
        $model->saveOrFail();

        return $model;
    }
}