<?php

/**
 * ZohoMail Integration
 *
 */

namespace BitCode\BitFormPro\Integration\ZohoMail;

use WP_Error;
use BitCode\BitForm\Core\Util\IpTool;
use BitCode\BitForm\Core\Util\HttpHelper;
use BitCode\BitForm\Core\Integration\IntegrationHandler;
use BitCode\BitFormPro\Integration\ZohoMail\RecordApiHelper;

/**
 * Provide functionality for ZohoCrm integration
 */
class ZohoMailHandler
{
    private $_formID;
    private $_integrationID;

    public function __construct($integrationID, $fromID)
    {
        $this->_formID = $fromID;
        $this->_integrationID = $integrationID;
    }

    /**
     * Helps to register ajax function's with wp
     *
     * @return null
     */
    public static function registerAjax()
    {
        add_action('wp_ajax_bitforms_zmail_generate_token', array(__CLASS__, 'generateTokens'));
        add_action('wp_ajax_bitforms_zmail_refresh_workspaces', array(__CLASS__, 'refreshWorkspacesAjaxHelper'));
        add_action('wp_ajax_bitforms_zmail_refresh_tables', array(__CLASS__, 'refreshTablesAjaxHelper'));
        add_action('wp_ajax_bitforms_zmail_refresh_table_headers', array(__CLASS__, 'refreshTableHeadersAjaxHelper'));
    }

    /**
     * Process ajax request for generate_token
     *
     * @return string zoho crm api response and status
     */
    public static function generateTokens()
    {
        if (isset($_REQUEST['_ajax_nonce']) && wp_verify_nonce($_REQUEST['_ajax_nonce'], 'bitforms_save')) {
            $authorizationHeader = null;
            $inputJSON = file_get_contents('php://input');
            $requestsParams = json_decode($inputJSON);
            if (
                empty($requestsParams->{'accounts-server'})
                || empty($requestsParams->dataCenter)
                || empty($requestsParams->clientId)
                || empty($requestsParams->clientSecret)
                || empty($requestsParams->redirectURI)
                || empty($requestsParams->code)
            ) {
                wp_send_json_error(
                    __(
                        'Requested parameter is empty',
                        'bitformpro'
                    ),
                    400
                );
            }

            $apiEndpoint = \urldecode($requestsParams->{'accounts-server'}) . '/oauth/v2/token';
            $requestParams = array(
                "grant_type" => "authorization_code",
                "client_id" => $requestsParams->clientId,
                "client_secret" => $requestsParams->clientSecret,
                "redirect_uri" => \urldecode($requestsParams->redirectURI),
                "code" => $requestsParams->code
            );
            $apiResponse = HttpHelper::post($apiEndpoint, $requestParams);

            $accountIdEndpoint = "http://mail.zoho.{$requestsParams->dataCenter}/api/accounts";
            $authorizationHeader["Authorization"] = "Zoho-oauthtoken {$apiResponse->access_token}";
            $accountResponse = HttpHelper::get($accountIdEndpoint, null, $authorizationHeader);

            $apiResponse->accountId = $accountResponse->data[0]->accountId;
            $apiResponse->accountEmail = $accountResponse->data[0]->primaryEmailAddress;

            if (is_wp_error($apiResponse) || !empty($apiResponse->error) || is_wp_error($accountResponse) || !empty($accountResponse->errors)) {
                wp_send_json_error(
                    empty($apiResponse->error) ? 'Unknown' : $apiResponse->error,
                    400
                );
            }
            $apiResponse->generates_on = \time();
            wp_send_json_success($apiResponse, 200);
        } else {
            wp_send_json_error(
                __(
                    'Token expired',
                    'bitformpro'
                ),
                401
            );
        }
    }

    /**
     * Helps to refresh zoho crm access_token
     *
     * @param  object $apiData Contains required data for refresh access token
     * @return string | bool  $tokenDetails API token details
     */
    protected static function _refreshAccessToken($apiData)
    {
        if (
            empty($apiData->dataCenter)
            || empty($apiData->clientId)
            || empty($apiData->clientSecret)
            || empty($apiData->tokenDetails)
        ) {
            return false;
        }
        $tokenDetails = $apiData->tokenDetails;

        $dataCenter = $apiData->dataCenter;
        $apiEndpoint = "https://accounts.zoho.{$dataCenter}/oauth/v2/token";
        $requestParams = array(
            "grant_type" => "refresh_token",
            "client_id" => $apiData->clientId,
            "client_secret" => $apiData->clientSecret,
            "refresh_token" => $tokenDetails->refresh_token,
        );

        $apiResponse = HttpHelper::post($apiEndpoint, $requestParams);
        if (is_wp_error($apiResponse) || !empty($apiResponse->error)) {
            return false;
        }
        $tokenDetails->generates_on = \time();
        $tokenDetails->access_token = $apiResponse->access_token;
        return $tokenDetails;
    }

    /**
     * Save updated access_token to avoid unnecessary token generation
     *
     * @param integer $fromID        ID of Integration related form
     * @param integer $integrationID ID of Zoho crm Integration
     * @param object $tokenDetails  refreshed token info
     *
     * @return null
     */
    protected static function _saveRefreshedToken($formID, $integrationID, $tokenDetails, $others = null)
    {
        if (empty($formID) || empty($integrationID)) {
            return;
        }

        $integrationHandler = new IntegrationHandler($formID, IpTool::getUserDetail());
        $zmailDetails = $integrationHandler->getAIntegration($integrationID);

        if (is_wp_error($zmailDetails)) {
            return;
        }
        $newDetails = json_decode($zmailDetails[0]->integration_details);

        $newDetails->tokenDetails = $tokenDetails;

        $integrationHandler->updateIntegration($integrationID, $zmailDetails[0]->integration_name, 'Zoho Mail', \json_encode($newDetails), 'form');
    }

    public function execute(IntegrationHandler $integrationHandler, $integrationData, $fieldValues, $entryID, $logID)
    {
        $integrationDetails = is_string($integrationData->integration_details) ? json_decode($integrationData->integration_details) : $integrationData->integration_details;

        $tokenDetails = $integrationDetails->tokenDetails;

        if (empty($tokenDetails)) {
            return new WP_Error('REQ_FIELD_EMPTY', __('module, fields are required for zoho mail api', 'bitformpro'));
        }

        $requiredParams = null;
        if ((intval($tokenDetails->generates_on) + (55 * 60)) < time()) {
            $requiredParams['clientId'] = $integrationDetails->clientId;
            $requiredParams['clientSecret'] = $integrationDetails->clientSecret;
            $requiredParams['dataCenter'] = $integrationDetails->dataCenter;
            $requiredParams['tokenDetails'] = $tokenDetails;
            $newTokenDetails = ZohoMailHandler::_refreshAccessToken((object)$requiredParams);
            if ($newTokenDetails) {
                ZohoMailHandler::_saveRefreshedToken($this->_formID, $this->_integrationID, $newTokenDetails);
                $tokenDetails = $newTokenDetails;
            }
        }
        // $actions = $integrationDetails->actions;
        $recordApiHelper = new RecordApiHelper($tokenDetails, $this->_integrationID, $logID);

        $zmailApiResponse = $recordApiHelper->executeRecordApi(
            $integrationDetails,
            $fieldValues,
            $this->_formID,
            $entryID
        );

        return $zmailApiResponse;
    }
}