<?php

/**
 * Matomo - free/libre analytics platform
 *
 * @link    https://matomo.org
 * @license https://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 */
namespace Piwik\Plugins\MobileMessaging;

use Piwik\Date;
use Piwik\Option;
use Piwik\Piwik;
class Model
{
    /**
     * send a SMS
     *
     * @return bool true
     */
    public function sendSMS(string $content, string $phoneNumber, string $from) : bool
    {
        $credential = $this->getSMSAPICredential();
        $SMSProvider = \Piwik\Plugins\MobileMessaging\SMSProvider::factory($credential[\Piwik\Plugins\MobileMessaging\MobileMessaging::PROVIDER_OPTION]);
        $SMSProvider->sendSMS($credential[\Piwik\Plugins\MobileMessaging\MobileMessaging::API_KEY_OPTION], $content, $phoneNumber, $from);
        $this->increaseCount(Piwik::getCurrentUserLogin(), \Piwik\Plugins\MobileMessaging\MobileMessaging::SMS_SENT_COUNT_OPTION, $phoneNumber);
        return \true;
    }
    /**
     * get activated phone number list
     *
     * @return array $phoneNumber
     */
    public function getActivatedPhoneNumbers(string $login) : array
    {
        return array_keys($this->getPhoneNumbers($login, \true));
    }
    /**
     * Returns the list of phone numbers with their verification data
     *
     * @return array
     */
    public function getPhoneNumbers(string $login, bool $onlyVerified = \true) : array
    {
        $phoneNumbers = $this->getPhoneNumbersFromSettings($login);
        foreach ($phoneNumbers as $phoneNumber => &$verificationData) {
            // always remove verification code, as it should not be accidentally revealed somewere
            unset($verificationData['verificationCode']);
        }
        if ($onlyVerified) {
            $phoneNumbers = array_filter($phoneNumbers, function ($verificationData) {
                return $verificationData['verified'];
            });
        }
        // Sort numbers. Unverified numbers first, then sorted by verification or request time
        uasort($phoneNumbers, function ($a, $b) {
            if ($a['verified'] === $b['verified']) {
                if ($a['verified']) {
                    return $b['verificationTime'] <=> $a['verificationTime'];
                }
                return $b['requestTime'] <=> $a['requestTime'];
            }
            return $a['verified'] <=> $b['verified'];
        });
        return $phoneNumbers;
    }
    /**
     * Tries to verify the given phone number with the given verification code
     *
     */
    public function verifyPhoneNumber(string $login, string $phoneNumber, string $verificationCode) : bool
    {
        $phoneNumbers = $this->getPhoneNumbersFromSettings($login);
        if (empty($phoneNumbers[$phoneNumber])) {
            return \false;
            // phone number does not exist
        }
        if ($phoneNumbers[$phoneNumber]['verified']) {
            return \true;
            // already verified
        }
        // unset verification code if it's older than 10 minutes
        if ($phoneNumbers[$phoneNumber]['requestTime'] < Date::getNowTimestamp() - 600) {
            $phoneNumbers[$phoneNumber]['verificationCode'] = null;
        } elseif ($phoneNumbers[$phoneNumber]['verificationCode'] !== $verificationCode) {
            // failed attempt: increase verification tries
            $phoneNumbers[$phoneNumber]['verificationTries']++;
            if ($phoneNumbers[$phoneNumber]['verificationTries'] >= 3) {
                // unset verification code after 3rd try
                $phoneNumbers[$phoneNumber]['verificationCode'] = null;
            }
        } else {
            // verification successfull
            $phoneNumbers[$phoneNumber]['verificationTries'] = 0;
            $phoneNumbers[$phoneNumber]['verificationCode'] = null;
            $phoneNumbers[$phoneNumber]['verified'] = \true;
            $phoneNumbers[$phoneNumber]['verificationTime'] = Date::getNowTimestamp();
        }
        $this->savePhoneNumbers($login, $phoneNumbers);
        return $phoneNumbers[$phoneNumber]['verified'];
    }
    /**
     * Adds a new phone number to the user, which needs to be verified with the provided code first
     *
     */
    public function addPhoneNumber(string $login, string $phoneNumber, string $verificationCode) : void
    {
        $phoneNumbers = $this->getPhoneNumbersFromSettings($login);
        $phoneNumbers[$phoneNumber] = ['verified' => \false, 'verificationCode' => $verificationCode, 'verificationTries' => 0, 'verificationTime' => null, 'requestTime' => Date::getNowTimestamp()];
        $this->savePhoneNumbers($login, $phoneNumbers);
    }
    /**
     * Removes a phone number
     *
     */
    public function removePhoneNumber(string $login, string $phoneNumber) : void
    {
        $phoneNumbers = $this->getPhoneNumbersFromSettings($login);
        unset($phoneNumbers[$phoneNumber]);
        $this->savePhoneNumbers($login, $phoneNumbers);
    }
    private function savePhoneNumbers(string $login, array $phoneNumbers) : void
    {
        $settings = $this->getUserSettings($login);
        $settings[\Piwik\Plugins\MobileMessaging\MobileMessaging::PHONE_NUMBERS_OPTION] = $phoneNumbers;
        $this->setUserSettings($login, $settings);
    }
    public function increaseCount(string $login, string $option, string $phoneNumber) : void
    {
        $settings = $this->getUserSettings($login);
        $counts = array();
        if (isset($settings[$option])) {
            $counts = $settings[$option];
        }
        $countToUpdate = 0;
        if (isset($counts[$phoneNumber])) {
            $countToUpdate = $counts[$phoneNumber];
        }
        $counts[$phoneNumber] = $countToUpdate + 1;
        $settings[$option] = $counts;
        $this->setUserSettings($login, $settings);
    }
    public function getSMSAPICredential() : array
    {
        $settings = $this->getCredentialManagerSettings();
        $credentials = isset($settings[\Piwik\Plugins\MobileMessaging\MobileMessaging::API_KEY_OPTION]) ? $settings[\Piwik\Plugins\MobileMessaging\MobileMessaging::API_KEY_OPTION] : null;
        // fallback for older values, where api key has been stored as string value
        if (!empty($credentials) && !is_array($credentials)) {
            $credentials = ['apiKey' => $credentials];
        }
        return [\Piwik\Plugins\MobileMessaging\MobileMessaging::PROVIDER_OPTION => isset($settings[\Piwik\Plugins\MobileMessaging\MobileMessaging::PROVIDER_OPTION]) ? $settings[\Piwik\Plugins\MobileMessaging\MobileMessaging::PROVIDER_OPTION] : null, \Piwik\Plugins\MobileMessaging\MobileMessaging::API_KEY_OPTION => $credentials];
    }
    public function setCredentialManagerSettings($settings) : void
    {
        $this->setUserSettings($this->getCredentialManagerLogin(), $settings);
    }
    public function getCredentialManagerSettings() : array
    {
        return $this->getUserSettings($this->getCredentialManagerLogin());
    }
    public function getDelegatedManagement() : bool
    {
        $option = Option::get(\Piwik\Plugins\MobileMessaging\MobileMessaging::DELEGATED_MANAGEMENT_OPTION);
        return \true === $option || 'true' === $option || 1 === $option || '1' === $option;
    }
    public function setDelegatedManagement(bool $delegatedManagement) : void
    {
        Option::set(\Piwik\Plugins\MobileMessaging\MobileMessaging::DELEGATED_MANAGEMENT_OPTION, $delegatedManagement);
    }
    private function setUserSettings(string $login, $settings) : void
    {
        Option::set($login . \Piwik\Plugins\MobileMessaging\MobileMessaging::USER_SETTINGS_POSTFIX_OPTION, json_encode($settings));
    }
    private function getCredentialManagerLogin() : string
    {
        return $this->getDelegatedManagement() ? Piwik::getCurrentUserLogin() : '';
    }
    private function getUserSettings(string $login) : array
    {
        $optionIndex = $login . \Piwik\Plugins\MobileMessaging\MobileMessaging::USER_SETTINGS_POSTFIX_OPTION;
        $userSettings = Option::get($optionIndex);
        if (empty($userSettings)) {
            $userSettings = [];
        } else {
            $userSettings = json_decode($userSettings, \true);
        }
        return $userSettings;
    }
    private function getPhoneNumbersFromSettings(string $login) : array
    {
        $settings = $this->getUserSettings($login);
        $phoneNumbers = array();
        if (isset($settings[\Piwik\Plugins\MobileMessaging\MobileMessaging::PHONE_NUMBERS_OPTION])) {
            $phoneNumbers = $settings[\Piwik\Plugins\MobileMessaging\MobileMessaging::PHONE_NUMBERS_OPTION];
        }
        if (!is_array($phoneNumbers) || empty($phoneNumbers)) {
            $phoneNumbers = [];
        }
        // Map old storage data to new format
        foreach ($phoneNumbers as $phoneNumber => &$verificationData) {
            if (is_string($verificationData)) {
                $verificationData = ['verified' => \false, 'verificationCode' => $verificationData, 'verificationTime' => null, 'verificationTries' => 0, 'requestTime' => Date::getNowTimestamp()];
            } elseif (null === $verificationData) {
                $verificationData = ['verified' => \true, 'verificationCode' => null, 'verificationTime' => null, 'verificationTries' => 0, 'requestTime' => Date::getNowTimestamp()];
            }
        }
        return $phoneNumbers;
    }
}
