<?php

namespace core\entities\user;

use core\entities\Session;
use core\events\EventTrait;
use DomainException;
use lhs\Yii2SaveRelationsBehavior\SaveRelationsBehavior;
use core\AggregateRoot;
use core\events\user\UserSignUpConfirmed;
use core\events\user\UserSignUpRequested;
use Yii;
use yii\base\Exception;
use yii\behaviors\TimestampBehavior;
use yii\db\ActiveQuery;
use yii\db\ActiveRecord;
use yii\web\UploadedFile;
use zertex\avatar_generator\AvatarGenerator;

/**
 * User model
 *
 * @property integer $id
 * @property string $username
 * @property string $password_hash
 * @property string $password_reset_token
 * @property string $email
 * @property string $email_confirm_token
 * @property string $auth_key
 * @property integer $status
 * @property integer $created_at
 * @property integer $updated_at
 * @property string $user_pic
 * @property string $backend_language
 * @property string $frontend_language
 * @property string $settings
 * @property string $password write-only password
 *
 * @property Network[] $networks
 * @property string $USER [char(32)]
 * @property int $CURRENT_CONNECTIONS [bigint]
 * @property int $TOTAL_CONNECTIONS [bigint]
 */
class User extends ActiveRecord implements AggregateRoot
{
    use EventTrait;

    const STATUS_WAIT = 0;
    const STATUS_ACTIVE = 10;

    /**
     * @param string $username
     * @param string $email
     * @param string $password
     * @return static
     * @throws Exception
     */
    public static function create(string $username, string $email, string $password): self
    {
        $user           = new User();
        $user->username = $username;
        $user->email    = $email;
        $user->setPassword(!empty($password) ? $password : Yii::$app->security->generateRandomString());
        $user->created_at = time();
        $user->status     = self::STATUS_ACTIVE;
        $user->auth_key   = Yii::$app->security->generateRandomString();

        if ($user->user_pic) {
            $fileName = md5('avatar-' . $user->user_pic->baseName . time()) . '.' . $user->user_pic->extension;
            if ($user->user_pic->saveAs((new AvatarGenerator())->getPath('avatar') . '/' . $fileName)) {
                $user->user_pic = $fileName;
            }
        }

        return $user;
    }

    /**
     * @param string $username
     * @param string $email
     * @param string $password
     * @param null $user_pic
     * @throws Exception
     */
    public function edit(string $username, string $email, string $password, $user_pic = null): void
    {
        $this->username   = $username;
        $this->email      = $email;
        $this->updated_at = time();

        if ($user_pic) {
            $fileName = md5('avatar-' . $user_pic->baseName . time()) . '.' . $user_pic->extension;
            if ($user_pic->saveAs((new AvatarGenerator())->getPath('avatar') . '/' . $fileName)) {
                (new AvatarGenerator())->remove('avatar', $this->user_pic);
                $this->user_pic = $fileName;
            }
        }

        if ($password) {
            $this->setPassword(!empty($password) ? $password : Yii::$app->security->generateRandomString());
            $this->generateAuthKey();
            Session::deleteAll(['user_id' => $this->id]);
        }
    }

    /**
     * @param string $email
     * @param string $username
     * @param string|null $password
     * @param null $user_pic
     * @param $language
     * @throws Exception
     */
    public function editProfile(
        string $email,
        string $username,
        string $password = null,
        $user_pic = null,
        $language
    ): void
    {
        $this->email    = $email;
        $this->username = $username;
        if ($password && !empty($password)) {
            $this->setPassword($password);
        }
        $this->updated_at       = time();
        $this->backend_language = $language;

        /* @var $user_pic UploadedFile */
        if ($user_pic) {
            $fileName = md5('avatar-' . $user_pic->baseName . time()) . '.' . $user_pic->extension;
            $path     = Yii::getAlias('@runtime/' . $fileName);
            $user_pic->saveAs($path);
            $this->user_pic = basename(Yii::$app->avatar->update($username, null, $path));
            if (file_exists($path)) {
                unlink($path);
            }
        }
    }

    /**
     * @param string $username
     * @param string $email
     * @param string $password
     * @return static
     * @throws Exception
     */
    public static function requestSignup(string $username, string $email, string $password): self
    {
        $user           = new User();
        $user->username = $username;
        $user->email    = $email;
        $user->setPassword($password);
        $user->created_at          = time();
        $user->status              = self::STATUS_WAIT;
        $user->email_confirm_token = Yii::$app->security->generateRandomString();
        $user->generateAuthKey();
        $user->recordEvent(new UserSignUpRequested($user));

        return $user;
    }

    public function confirmSignup(): void
    {
        if (!$this->isWait()) {
            throw new DomainException('User is already active.');
        }
        $this->status              = self::STATUS_ACTIVE;
        $this->email_confirm_token = null;
        $this->recordEvent(new UserSignUpConfirmed($this));
    }

    /**
     * @param $network
     * @param $identity
     * @return static
     * @throws Exception
     */
    public static function signupByNetwork($network, $identity): self
    {
        $user             = new User();
        $user->created_at = time();
        $user->status     = self::STATUS_ACTIVE;
        $user->generateAuthKey();
        $user->networks = [Network::create($network, $identity)];

        return $user;
    }

    public function attachNetwork($network, $identity): void
    {
        $networks = $this->networks;
        foreach ($networks as $current) {
            if ($current->isFor($network, $identity)) {
                throw new DomainException('Network is already attached.');
            }
        }
        $networks[]     = Network::create($network, $identity);
        $this->networks = $networks;
    }

    /**
     * @throws Exception
     */
    public function requestPasswordReset(): void
    {
        if (!empty($this->password_reset_token) && self::isPasswordResetTokenValid($this->password_reset_token)) {
            throw new DomainException(Yii::t('auth', 'Password resetting is already requested.'));
        }
        $this->password_reset_token = Yii::$app->security->generateRandomString() . '_' . time();
    }

    /**
     * @param $password
     * @throws Exception
     */
    public function resetPassword($password): void
    {
        if (empty($this->password_reset_token)) {
            throw new DomainException(Yii::t('auth', 'Password resetting is not requested.'));
        }
        $this->setPassword($password);
        $this->password_reset_token = null;
    }

    public function isWait(): bool
    {
        return $this->status === self::STATUS_WAIT;
    }

    public function isActive(): bool
    {
        return $this->status === self::STATUS_ACTIVE;
    }

    public function getNetworks(): ActiveQuery
    {
        return $this->hasMany(Network::class, ['user_id' => 'id']);
    }

    /**
     * @inheritdoc
     */
    public static function tableName(): string
    {
        return '{{%users}}';
    }

    /**
     * @inheritdoc
     */
    public function behaviors(): array
    {
        return [
            TimestampBehavior::class,
            [
                'class'     => SaveRelationsBehavior::class,
                'relations' => ['networks'],
            ],
        ];
    }

    public function transactions()
    {
        return [
            self::SCENARIO_DEFAULT => self::OP_ALL,
        ];
    }

    /**
     * Finds user by username
     *
     * @param string $username
     *
     * @return static|null
     */
    public static function findByUsername(string $username): ?static
    {
        return static::findOne(['username' => $username, 'status' => self::STATUS_ACTIVE]);
    }

    /**
     * Finds user by password reset token
     *
     * @param string $token password reset token
     *
     * @return static|null
     */
    public static function findByPasswordResetToken(string $token): ?static
    {
        if (!static::isPasswordResetTokenValid($token)) {
            return null;
        }

        return static::findOne([
            'password_reset_token' => $token,
            'status'               => self::STATUS_ACTIVE,
        ]);
    }

    /**
     * Finds out if password reset token is valid
     *
     * @param string $token password reset token
     *
     * @return bool
     */
    public static function isPasswordResetTokenValid(string $token): bool
    {
        if (empty($token)) {
            return false;
        }

        $timestamp = (int)substr($token, strrpos($token, '_') + 1);
        $expire    = Yii::$app->params['user.passwordResetTokenExpire'];

        return $timestamp + $expire >= time();
    }

    /**
     * Validates password
     *
     * @param string $password password to validate
     *
     * @return bool if password provided is valid for current user
     */
    public function validatePassword(string $password): bool
    {
        return Yii::$app->security->validatePassword($password, $this->password_hash);
    }

    /**
     * @param $password
     *
     * @throws Exception
     */
    public function setPassword($password)
    {
        $this->password_hash = Yii::$app->security->generatePasswordHash($password);
    }

    /**
     * Removes password reset token
     */
    public function removePasswordResetToken()
    {
        $this->password_reset_token = null;
    }

    /**
     * Generates "remember me" authentication key
     * @throws Exception
     */
    public function generateAuthKey()
    {
        $this->auth_key = Yii::$app->security->generateRandomString();
    }

    public function attributeLabels()
    {
        return [
            'id'         => Yii::t('user', 'ID'),
            'username'   => Yii::t('user', 'Username'),
            'email'      => Yii::t('user', 'E-mail'),
            'status'     => Yii::t('user', 'Status'),
            'created_at' => Yii::t('user', 'Created At'),
            'updated_at' => Yii::t('user', 'Updated At'),
        ];
    }

    /**
     * Generates new password reset token
     * @throws Exception
     */
    public function generatePasswordResetToken()
    {
        $this->password_reset_token = Yii::$app->security->generateRandomString() . '_' . time();
    }
}