<?php
namespace core\entities\user;

use core\entities\Session;
use core\events\EventTrait;
use lhs\Yii2SaveRelationsBehavior\SaveRelationsBehavior;
use core\AggregateRoot;
use core\events\user\UserSignUpConfirmed;
use core\events\user\UserSignUpRequested;
use Yii;
use yii\behaviors\TimestampBehavior;
use yii\db\ActiveQuery;
use yii\db\ActiveRecord;
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 $password write-only password
 *
 * @property Network[] $networks
 */
class User extends ActiveRecord implements AggregateRoot
{
    use EventTrait;

    const STATUS_WAIT = 0;
    const STATUS_ACTIVE = 10;

    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;
    }

    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]);
	    }
    }

    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 $user_pic \yii\web\UploadedFile */
	    if ($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);
		    }
	    }
    }

    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));
    }

    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;
    }


    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();
    }

    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()
    {
        return '{{%users}}';
    }

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

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

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

    /**
     * Finds user by password reset token
     *
     * @param string $token password reset token
     * @return static|null
     */
    public static function findByPasswordResetToken($token)
    {
        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 $token password reset token
     * @return bool
     */
    public static function isPasswordResetTokenValid($token)
    {
        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 $password password to validate
     * @return bool if password provided is valid for current user
     */
    public function validatePassword($password)
    {
        return Yii::$app->security->validatePassword($password, $this->password_hash);
    }

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

    /**
     * Generates "remember me" authentication key
     */
    private 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'),
	    ];
    }
}