<?php

namespace App\SupportedApps\Jaeger;

class Jaeger extends \App\SupportedApps implements \App\EnhancedApps
{
    public $config;

    public function __construct()
    {
    }

    private function tracesUrl()
    {
        $service = $this->config->service;
        $operation = $this->config->operation;
        $tags = $this->config->tags;
        $lookback = $this->config->lookback;
        $minDuration = $this->config->minDuration;
        $maxDuration = $this->config->maxDuration;
        $limit = $this->config->limit;

        $endpoint = "api/traces?service=" . urlencode($service);
        if (!empty($operation)) {
            $endpoint .= "&operation=" . urlencode($operation);
        }
        if (!empty($tags)) {
            $endpoint .= "&tags=" . urlencode($tags);
        }
        if (!empty($lookback)) {
            $lookbackFormatted = str_replace(
                "d",
                " days",
                str_replace("h", " hours", $lookback)
            );
            $timestampForOffset = time();
            $offset =
                $timestampForOffset -
                strtotime("-" . $lookbackFormatted, $timestampForOffset);

            $timestamp = microtime(true);
            $end = sprintf("%0.0f", $timestamp * 1000000);
            $start = sprintf("%0.0f", ($timestamp - $offset) * 1000000);
            $endpoint .= "&lookback=" . urlencode($lookback);
            $endpoint .= "&start=" . $start;
            $endpoint .= "&end=" . $end;
        }
        if (!empty($minDuration)) {
            $endpoint .= "&minDuration=" . urlencode($minDuration);
        }
        if (!empty($maxDuration)) {
            $endpoint .= "&maxDuration=" . urlencode($maxDuration);
        }
        if (!empty($limit)) {
            $endpoint .= "&limit=" . urlencode($limit);
        }
        return $this->url($endpoint);
    }

    public function test()
    {
        $test = parent::appTest($this->tracesUrl());
        echo $test->status;
    }

    public function livestats()
    {
        $status = "inactive";
        $res = parent::execute($this->tracesUrl());
        $details = json_decode($res->getBody());

        $data = [];

        if ($details) {
            $status = "active";
            $data["traces"] = count($details->data);
            $data["avg_duration"] = 0;
            if ($data["traces"] > 0) {
                $durations = array_map(function ($dataItem) {
                    $max = 0;
                    foreach ($dataItem->spans as $spanItem) {
                        $max = max($max, $spanItem->duration);
                    }
                    return $max;
                }, $details->data);
                $data["avg_duration"] = round(
                    array_sum($durations) / $data["traces"] / 1000,
                    1
                );
            }
        }
        return parent::getLiveStats($status, $data);
    }
    public function url($endpoint)
    {
        $api_url = parent::normaliseurl($this->config->url) . $endpoint;
        return $api_url;
    }
}