// Copyright (C) 2019 Marius Schellenberger

package main

import (
	"encoding/json"
	"io/ioutil"
	"log"
	"net/http"
	"os"
	"strings"
)

const (
	githubAPI = "api/v3"
	giteaAPI  = "api/v1"
)

func getNS() (string, error) {
	if ns := os.Getenv("POD_NAMESPACE"); ns != "" {
		return ns, nil
	}
	if data, err := ioutil.ReadFile("/var/run/secrets/kubernetes.io/serviceaccount/namespace"); err == nil {
		if ns := strings.TrimSpace(string(data)); len(ns) > 0 {
			return ns, nil
		}
	}

	return "default", nil
}

func logError(w http.ResponseWriter, msg string) {
	log.Printf("error: %s", msg)
	http.Error(w, msg, http.StatusInternalServerError)
}

func contains(a []string, s string) bool {
	for _, v := range a {
		if strings.Contains(s, v) {
			return true
		}
	}
	return false
}

func detectAPI(r *http.Request) string {
	if r.Header.Get(giteaEvent) != "" {
		return giteaAPI
	}
	if r.Header.Get(githubEvent) != "" {
		return githubAPI
	}
	return ""
}

func readBody(r *http.Request, i interface{}) (body []byte, err error) {
	defer r.Body.Close()
	body, err = ioutil.ReadAll(r.Body)
	if err != nil {
		return
	}
	if debug {
		log.Printf("debug headers: %#v", r.Header)
		log.Printf("debug: %s", string(body))
	}
	err = json.Unmarshal(body, i)
	return
}