<?php

class Zabbix {
    private $url;
    private $apiKey;

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

    public function zabbixRequest($method, $params) {
        $data = array(
            'jsonrpc' => '2.0',
            'method' => $method,
            'params' => $params,
            'id' => 1
        );

        $options = array(
            'http' => array(
                'header' => "Content-Type: application/json\r\n" .
                    "Authorization: Bearer " . $this->apiKey . "\r\n",
                'method' => 'POST',
                'content' => json_encode($data)
            )
        );

        $context = stream_context_create($options);
        $result = file_get_contents($this->url, false, $context);

        return json_decode($result, true);
    }

    public function getAllCongestionInterfaces() {
        $response = $this->zabbixRequest('item.get', array(
            'search' => array('name' => array("Congestion")),
        ));
        return $response['result'];
    }

    public function getHostById($hostId) {
        $response = $this->zabbixRequest('host.get', array(
            'hostids' => $hostId
        ));
        return $response['result'];
    }

    public function getItemValues($itemIds, $limit = 15) {
        $response = $this->zabbixRequest('history.get', array(
            'itemids' => $itemIds,
            'output' => 'extend',
            'sortfield' => 'clock',
            'sortorder' => 'DESC',
            'limit' => $limit
        ));
        return $response['result'];
    }

    public function getHosts($hostname) {
        $response = $this->zabbixRequest('host.get', array(
            'search' => array('name' => array($hostname))
        ));
        return $response['result'];
    }

    public function getHostInterfaceItems($hostId) {
        $response = $this->zabbixRequest('item.get', array(
            'hostids' => $hostId,
            'output' => ['itemid','name_resolved', 'key_', 'units'],
            'search' => ['name' => ["Bits received", "Bits sent"]],
            'searchByAny' => true,
            'sortfield' => 'name'
        ));
        return $response['result'];
    }

    public function getICMPItems($hostId) {
        $response = $this->zabbixRequest('item.get', array(
            'hostids' => $hostId,
            'search' => array('name' => array("ICMP"))
        ));
        return $response['result'];
    }

    public function getUptimeItems($hostId) {
        $response = $this->zabbixRequest('item.get', array(
            'hostids' => $hostId,
            'search' => array('name' => array("Uptime"))
        ));
        return $response['result'];
    }

    public function getHostInterfaces($hostIds) {
        $response = $this->zabbixRequest('hostinterface.get', array('hostids' => $hostIds));
        return $response['result'];
    }

    public function createTask($itemid) {
        $response = $this->zabbixRequest('task.create', array(
            'type' => 6,
            'request' => array(
                'itemid' => $itemid
            )
        ));
        return $response['result'];
    }
}