<?php

class KolmisoftMore {
    private string $host;
    private string $username;
    private string $apiKey;

    public function __construct($host, $apiKey, $username) {
        $this->host = $host;
        $this->apiKey = $apiKey;
        $this->username = $username;
    }

    /**
     * Generate hash for the given query parameters
     * @param $queryParameters - Array of query parameters to generate hash
     * @return string
     */
    public function generateHash($queryParameters): string {
        // concatenate all query parameters values in order of the array and then add apiKey to the end

        $queryString = implode('', $queryParameters);
        $queryString .= $this->apiKey;

        return hash('sha1', $queryString);
    }

    /**
     * Make a request to the Kolmisoft API
     * @param $path - API path
     * @param $queryString - Query string
     * @return array|bool
     */
    public function makeRequest($path, $queryString) {
        $url = "https://{$this->host}/billing/api/$path?$queryString";

        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

        $response = curl_exec($curl);

        try {
            $response = new SimpleXMLElement($response);
        } catch (Exception $e) {
            return false;
        }

        $response = json_decode(json_encode($response), true);

        if (is_array($response)) {
            return $response;
        } else {
            return false;
        }
    }

    public function getVoiceCallHistory($startDate, $endDate) {

        $queryParameters = [
            'period_start' => $startDate,
            'period_end' => $endDate
        ];

        $hash = $this->generateHash($queryParameters);

        $queryParameters['hash'] = $hash;
        $queryParameters['u'] = $this->username;

        $queryString = http_build_query($queryParameters);

        $response = $this->makeRequest('user_calls_get', $queryString);

        if ($response) {
            return $response['calls_stat']['calls']['call'];
        } else {
            return false;
        }

    }

    public function getActiveCalls() {
        $queryParameters = ['u' => $this->username];

        $hash = $this->generateHash($queryParameters);

        $queryParameters['hash'] = $hash;

        $queryString = http_build_query($queryParameters);

        $response = $this->makeRequest('active_calls_get', $queryString);

        if ($response) {
            return $response['status']['active_call'];
        } else {
            return false;
        }
    }

}