<?php

/*
 * This file is part of RaspiSMS.
 *
 * (c) Pierre-Lin Bonnemaison <plebwebsas@gmail.com>
 *
 * This source file is subject to the GPL-3.0 license that is bundled
 * with this source code in the file LICENSE.
 */

namespace adapters;

/**
 * Octopush SMS service with a shortcode adapter.
 */
class OctopushShortcodeAdapter implements AdapterInterface
{
    const ERROR_CODE_OK = '000';
    const SMS_TYPE_LOWCOST = 'XXX';
    const SMS_TYPE_PREMIUM = 'FR';
    const SMS_TYPE_INTERNATIONAL = 'WWW';

    /**
     * Datas used to configure interaction with the implemented service. (e.g : Api credentials, ports numbers, etc.).
     */
    private $datas;

    /**
     * Octopush login.
     */
    private $login;

    /**
     * Octopush api key.
     */
    private $api_key;

    /**
     * Sender name to use instead of shortcode.
     */
    private $sender;

    /**
     * Octopush api baseurl.
     */
    private $api_url = 'https://www.octopush-dm.com/api';

    /**
     * Adapter constructor, called when instanciated by RaspiSMS.
     *
     * @param string      $number : Phone number the adapter is used for
     * @param json string $datas  : JSON string of the datas to configure interaction with the implemented service
     */
    public function __construct(string $datas)
    {
        $this->datas = json_decode($datas, true);

        $this->login = $this->datas['login'];
        $this->api_key = $this->datas['api_key'];
        $this->sender = $this->datas['sender'] ?? null;
    }

    /**
     * Classname of the adapter.
     */
    public static function meta_classname(): string
    {
        return __CLASS__;
    }

    /**
     * Uniq name of the adapter
     * It should be the classname of the adapter un snakecase.
     */
    public static function meta_uid(): string
    {
        return 'octopush_shortcode_adapter';
    }

    /**
     * Name of the adapter.
     * It should probably be the name of the service it adapt (e.g : Gammu SMSD, OVH SMS, SIM800L, etc.).
     */
    public static function meta_name(): string
    {
        return 'Octopush Shortcode';
    }

    /**
     * Description of the adapter.
     * A short description of the service the adapter implements.
     */
    public static function meta_description(): string
    {
        $credentials_url = 'https://www.octopush-dm.com/api-logins';

        return '
                Envoi de SMS avec un shortcode en utilisant <a target="_blank" href="https://www.octopush.com/">Octopush</a>. Pour trouver vos clés API Octopush <a target="_blank" href="' . $credentials_url . '">cliquez ici.</a><br/>
                Pour plus d\'information sur l\'utilisation de l\'adaptateur, reportez-vous à <a href="https://documentation.raspisms.fr/users/adapters/octopush_shortcode.html" target="_blank">la documentation sur l\'adaptateur Octopush Shortcode.</a>
            ';
    }

    /**
     * List of entries we want in datas for the adapter.
     *
     * @return array : Every line is a field as an array with keys : name, title, description, required
     */
    public static function meta_datas_fields(): array
    {
        return [
            [
                'name' => 'login',
                'title' => 'Octopush Login',
                'description' => 'Login du compte Octopush à employer. Trouvable sur la page des identifiants API Octopush.',
                'required' => true,
            ],
            [
                'name' => 'api_key',
                'title' => 'API Key',
                'description' => 'Clef API octopush. Trouvable sur la page des identifiants API Octopush.',
                'required' => true,
            ],
            [
                'name' => 'sender',
                'title' => 'Nom de l\'expéditeur',
                'description' => 'Nom de l\'expéditeur à afficher à la place du numéro (11 caractères max).<br/>
                                  <b>Laissez vide pour ne pas utiliser d\'expéditeur nommé.</b><br/>
                                  <b>Si vous utilisez un expéditeur nommé, le destinataire ne pourra pas répondre.</b>',
                'required' => false,
            ],
        ];
    }

    /**
     * Does the implemented service support reading smss.
     */
    public static function meta_support_read(): bool
    {
        return false;
    }

    /**
     * Does the implemented service support flash smss.
     */
    public static function meta_support_flash(): bool
    {
        return false;
    }

    /**
     * Does the implemented service support status change.
     */
    public static function meta_support_status_change(): bool
    {
        return true;
    }

    /**
     * Does the implemented service support reception callback.
     */
    public static function meta_support_reception(): bool
    {
        return true;
    }

    /**
     * Method called to send a SMS to a number.
     *
     * @param string $destination : Phone number to send the sms to
     * @param string $text        : Text of the SMS to send
     * @param bool   $flash       : Is the SMS a Flash SMS
     *
     * @return array : [
     *               bool 'error' => false if no error, true else
     *               ?string 'error_message' => null if no error, else error message
     *               array 'uid' => Uid of the sms created on success
     *               ]
     */
    public function send(string $destination, string $text, bool $flash = false)
    {
        $response = [
            'error' => false,
            'error_message' => null,
            'uid' => null,
        ];

        try
        {
            $datas = [
                'user_login' => $this->login,
                'api_key' => $this->api_key,
                'sms_text' => $text,
                'sms_recipients' => str_replace('+', '00', $destination), //Must use 00 instead of + notation
                'sms_sender' => '12345',
                'sms_type' => self::SMS_TYPE_LOWCOST,
            ];

            if (null !== $this->sender)
            {
                $datas['sms_sender'] = $this->sender;
            }

            $endpoint = $this->api_url . '/sms/json';

            $curl = curl_init();
            curl_setopt($curl, CURLOPT_URL, $endpoint);
            curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
            curl_setopt($curl, CURLOPT_POST, true);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $datas);
            $response = curl_exec($curl);
            curl_close($curl);

            if (false === $response)
            {
                $response['error'] = true;
                $response['error_message'] = 'HTTP query failed.';

                return $response;
            }

            $response_decode = json_decode($response, true);
            if (null === $response_decode)
            {
                $response['error'] = true;
                $response['error_message'] = 'Invalid JSON for response.';

                return $response;
            }

            if (self::ERROR_CODE_OK !== $response_decode['error_code'])
            {
                $response['error'] = true;
                $response['error_message'] = 'Response indicate error code : ' . $response_decode['error_code'];

                return $response;
            }

            $uid = $response_decode['ticket'] ?? false;
            if (!$uid)
            {
                $response['error'] = true;
                $response['error_message'] = 'Cannot extract SMS uid';

                return $response;
            }

            $response['uid'] = $uid;

            return $response;
        }
        catch (\Throwable $t)
        {
            $response['error'] = true;
            $response['error_message'] = $t->getMessage();

            return $response;
        }
    }

    /**
     * Method called to read SMSs of the number.
     *
     * @return array : [
     *               bool 'error' => false if no error, true else
     *               ?string 'error_message' => null if no error, else error message
     *               array 'sms' => Array of the sms reads
     *               ]
     */
    public function read(): array
    {
        return [];
    }

    /**
     * Method called to verify if the adapter is working correctly
     * should be use for exemple to verify that credentials and number are both valid.
     *
     * @return bool : False on error, true else
     */
    public function test(): bool
    {
        try
        {
            $success = true;

            if ($this->datas['sender'] && (mb_strlen($this->datas['sender']) < 3 || mb_strlen($this->datas['sender'] > 11)))
            {
                return false;
            }

            $datas = [
                'user_login' => $this->login,
                'api_key' => $this->api_key,
            ];

            //Check service name
            $endpoint = $this->api_url . '/balance/json';
            $curl = curl_init();
            curl_setopt($curl, CURLOPT_URL, $endpoint);
            curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
            curl_setopt($curl, CURLOPT_POST, true);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $datas);
            $response = curl_exec($curl);
            curl_close($curl);

            if (false === $response)
            {
                return false;
            }

            $response_decode = json_decode($response, true);
            if (null === $response_decode)
            {
                return false;
            }

            if (self::ERROR_CODE_OK !== $response_decode['error_code'])
            {
                return false;
            }

            return true;
        }
        catch (\Throwable $t)
        {
            return false;
        }
    }

    /**
     * Method called on reception of a status update notification for a SMS.
     *
     * @return mixed : False on error, else array ['uid' => uid of the sms, 'status' => New status of the sms (\models\Sended::STATUS_UNKNOWN, \models\Sended::STATUS_DELIVERED, \models\Sended::STATUS_FAILED)]
     */
    public static function status_change_callback()
    {
        header('Connection: close');
        header('Content-Encoding: none');
        header('Content-Length: 0');

        $uid = $_POST['message_id'] ?? false;
        $status = $_POST['status'] ?? false;

        if (false === $uid || false === $status)
        {
            return false;
        }

        switch ($status)
        {
            case 'DELIVERED':
                $status = \models\Sended::STATUS_DELIVERED;

                break;

            case 'NOT_ALLOWED':
            case 'INVALID_DESTINATION_ADDRESS':
            case 'OUT_OF_DATE':
            case 'EXPIRED':
            case 'BLACKLISTED_NUMBER':
                $status = \models\Sended::STATUS_FAILED;

                break;

            default:
                $status = \models\Sended::STATUS_UNKNOWN;

                break;
        }

        return ['uid' => $uid, 'status' => $status];
    }

    /**
     * Method called on reception of a sms notification.
     *
     * @return array : [
     *               bool 'error' => false on success, true on error
     *               ?string 'error_message' => null on success, error message else
     *               array 'sms' => array [
     *               string 'at' : Recepetion date format Y-m-d H:i:s,
     *               string 'text' : SMS body,
     *               string 'origin' : SMS sender,
     *               ]
     *
     * ]
     */
    public static function reception_callback(): array
    {
        $response = [
            'error' => false,
            'error_message' => null,
            'uid' => null,
        ];

        header('Connection: close');
        header('Content-Encoding: none');
        header('Content-Length: 0');

        $number = $_POST['number'] ?? false;
        $text = $_POST['text'] ?? false;
        $at = $_POST['reception_date'] ?? false;

        if (!$number || !$text || !$at)
        {
            $response['error'] = true;
            $response['error_message'] = 'One required data of the callback is missing.';

            return $response;
        }

        $origin = \controllers\internals\Tool::parse_phone('+' . mb_substr($number, 2));
        if (!$origin)
        {
            $response['error'] = true;
            $response['error_message'] = 'Invalid origin number : ' . mb_substr($number, 2);

            return $response;
        }

        $response['sms'] = [
            'at' => $at,
            'text' => $text,
            'origin' => $origin,
        ];

        return $response;
    }
}