<?php

class Vodia_Api {
    private $log;
    private $baseurl;
    private $admin_user;
    private $admin_pass;
    private $session_name;
    private $session_id;


    public function __construct($baseurl, $admin_user, $admin_pass) {
        $this->log = mfLoghandler::singleton();

        $this->baseurl = rtrim($baseurl, '/');
        $this->admin_user = $admin_user;
        $this->admin_pass = $admin_pass;

        if(!$this->baseurl || !$this->admin_user || !$this->admin_pass) {
            throw new Exception("Invalid Arguments");
        }
    }

    private function _authenticate($domain) {
        $this->session_name = "auth";
        $session_key = "vodia.$domain.auth.sessionid";
        $session = new mfConfig($session_key);

        if ($session->value() && (time() - $session->edit) < 3000) {
            $this->session_id = $session->value();
            return true;
        }

        $ctx_options = ["http" => [
            "ignore_errors" => true,
            "method" => "POST",
            "headers" => [
                "Accept: application/json",
                "Content-Type: application/json",
            ],
            "content" => json_encode([
                "name" => $this->session_name,
                "value" => "$this->admin_user " . md5($this->admin_pass),
                "admin" => true,
                "domain" => $domain,
            ]),
        ]];

        $url = $this->baseurl . VODIA_API_EP_SYSTEM_SESSION;
        $ctx = stream_context_create($ctx_options);
        $output = file_get_contents($url, false, $ctx);

        $session_id = preg_match('/^"([^"]+)"$/', $output, $matches) ? ($matches[1] ?? null) : null;

        if (!$session_id) {
            throw new Exception("Authentication failed for domain $domain");
        }

        $session->value($session_id);
        $session->save();

        $this->session_id = $session_id;
        return true;
    }

    private function _get($endpoint, $domain, $user): ?array {
        if (!$this->session_id) {
            $this->_authenticate($domain);
        }

        $url = str_replace(['{DOMAIN}', '{EXT}'], [$domain, $user], $this->baseurl . $endpoint);

        $context = stream_context_create([
            'http' => [
                'ignore_errors' => true,
                'method' => 'GET',
                'header' => [
                    'Cookie: session=' . $this->session_id,
                    'Accept: application/json',
                    'Content-Type: application/json',
                ],
            ]
        ]);

        $output = file_get_contents($url, false, $context);

        return json_decode($output, true);
    }

    public function setUsersettings($domain, $user, Array $user_settings) {
        if(!$this->session_id) $this->_authenticate($domain);

        $url = $this->baseurl.VODIA_API_EP_POST_USER_SETTINGS;
        $url = str_replace("{DOMAIN}", $domain, $url);
        $url = str_replace("{EXT}", $user, $url);

        $ctx_options = [
            "http" => [
                "ignore_errors" => true,
                "method" => "POST",
                "header" => [
                    "Cookie: session=".$this->session_id,
                    "Accept: application/json",
                    "Content-Type: application/json",
                ],
                "content" => json_encode($user_settings),
            ]
        ];

        $ctx = stream_context_create($ctx_options);
        file_get_contents($url, false, $ctx);

        return true;
    }

    public function getUsersetting($domain, $user, $key = false) {
        $settings = $this->_get(VODIA_API_EP_GET_USER_SETTINGS, $domain, $user);

        return $key ? ($settings[$key] ?? false) : $settings;
    }

    public function getActiveCalls($domain, $user) {
        return $this->_get(VODIA_API_EP_GET_USER_CALLS, $domain, $user);
    }

}