package main

import (
    "net/http"
    "os"
    "html/template"
    "log"
)

var templates = template.Must(template.ParseGlob("*.html"))

func main() {
    mode := os.Getenv("DEBUG_MODE")
    if mode == "true" {
        log.Println("Debug mode is on")
    }
    http.HandleFunc("/imprint", imprint)
    http.HandleFunc("/about", about)
    http.HandleFunc("/", homepage)
    http.HandleFunc("/monitoring", monitoring)
    log.Fatal(http.ListenAndServe(":8080", nil))
}

func imprint(w http.ResponseWriter, r *http.Request) {
    renderTemplate(w, "imprint.html")
}

func about(w http.ResponseWriter, r *http.Request) {
    renderTemplate(w, "about.html")
}

func homepage(w http.ResponseWriter, r *http.Request) {
    renderTemplate(w, "homepage.html")
}

func monitoring(w http.ResponseWriter, r *http.Request) {
    gitURL := os.Getenv("GIT_URL")
    websiteURL := os.Getenv("WEBSITE_URL")
    gitStatus := getStatus(gitURL)
    websiteStatus := getStatus(websiteURL)
    data := struct {
        GitStatus    string
        WebsiteStatus string
    }{
        GitStatus:    gitStatus,
        WebsiteStatus: websiteStatus,
    }
    renderTemplate(w, "monitoring.html", data)
}

func renderTemplate(w http.ResponseWriter, tmpl string, data ...interface{}) {
    err := templates.ExecuteTemplate(w, tmpl, data)
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
    }
}

func getStatus(link string) string {
    resp, err := http.Get(link)
    if err != nil {
        return "OFFLINE"
    }
    defer resp.Body.Close()
    if resp.StatusCode == 200 {
        return "ONLINE"
    }
    return "ERROR"
}