<?php

namespace App\Logic;

use App\Email\Guests\ChangeEmailStart;
use App\Exceptions\GeneralErrorMessageException;
use App\Features\InstanceAble;
use App\Kintone\Models\Customer;
use App\Models\EmailChangeToken;
use App\Models\Feature\UserId;
use App\Models\User;
use App\Util\DateUtil;
use Illuminate\Support\Str;
use LogicException;

class EmailChangeManager
{

    use InstanceAble, UserId;

    private ?User $user = null;

    private ?EmailChangeToken $model = null;


    public function setUser(User $user): static
    {
        $this->user = $user;
        $this->model = EmailChangeToken::whereUserId($user->id)->first();
        return $this;
    }

    public function generate(string $newEmail): EmailChangeToken
    {
        if ($this->user === null) {
            throw new LogicException("User不正");
        }

        // 重複チェック
        if (!$this->checkDuplication($newEmail)) {
            throw new GeneralErrorMessageException("すでに登録されているEmailです");
        }

        if ($this->model === null) {
            $this->model = new EmailChangeToken();
        }

        $this->model->user_id = $this->user->id;
        $this->model->token = Str::uuid();
        $this->model->new_email = $newEmail;
        $this->setExpires();

        $this->model->save();


        // メール送信
        $email = (new ChangeEmailStart($this->model))
            ->setEmail($newEmail);
        $emailManager = new EmailManager($email);
        $emailManager->confirm();

        return $this->model;
    }

    public function verify(string $token)
    {
        $model = EmailChangeToken::whereToken($token)->firstOrFail();

        $user = $model->user;
        if ($user === null) {
            throw new LogicException("User不正");
        }
        // 利用者情報の更新
        $user->email = $model->new_email;
        $user->save();

        // KINTONE側の更新
        $access = Customer::getAccess();
        $customer = $access->find($user->kintone_id);
        $customer->set(Customer::FIELD_EMAIL, $model->new_email);
        $access->update($customer);

        // トークン削除
        $model->delete();
        return $customer;
    }

    /**
     * 重複チェック
     *
     * @param string $newEmail
     * @return boolean
     */
    private function checkDuplication(string $newEmail): bool
    {
        return  !User::whereEmail($newEmail)->exists() &&
            !EmailChangeToken::whereNewEmail($newEmail)->expiresIn()
                ->whereNot(EmailChangeToken::COL_NAME_USER_ID, $this->user->id)
                ->exists();
    }

    private function setExpires()
    {
        if ($this->model === null) {
            throw new LogicException("Model不正");
        }
        $this->model->expires_at = DateUtil::now()->addHours(24);
    }
}