package main

import (
	"html/template"
	"net/http"
	"os"
	"path"
        "time"
)

type Scale struct {
  Deveui            string
  Alias             string
  Alarmactive       string
  Smsnumber         string
  Last_measurement  string
  Last_temp         string
  Last_humidity     string
  Last_weight       string
  Last_pressure     string
  Last_accu_level   string
}

func serveTemplate(w http.ResponseWriter, r *http.Request) {
	logit("Called URL: "+r.URL.Path)
	// wennn kein File angegeben ist: index.html
	if r.URL.Path == "/" {
		r.URL.Path = "/index.html"
	}
	lp := path.Join("templates", "layout.html")
	fp := path.Join("snippets", r.URL.Path)

	// Return a 404 if the template doesn't exist
	_, err := os.Stat(fp)
	if err != nil {
		if os.IsNotExist(err) {
			logit("URL not found: " + fp)
			fp = path.Join("snippets", "404.html")
		}
	}

	tmpl, err := template.ParseFiles(lp, fp)
	if err != nil {
		// Log the detailed error
		logit(err.Error())
		// Return a generic "Internal Server Error" message
		http.Error(w, http.StatusText(500), 500)
		return
	}

        var userName = getUserName(r)

        t := time.Now()
        var datetimestring = t.Format("20060102150405")
        var scales = getMyDevs(userName)
        var last_metrics []OneMetric

	if (r.URL.Path == "/scales.html") || (r.URL.Path == "/abos.html") {
                // wir holen noch die letzten Metriken
                for _, v := range scales {
                   last_metric := getLastMetrics(v)
                   last_metrics = append(last_metrics, last_metric)
                }
	}

        data := struct {
            UserName  string
            DateTimeString string
            Scales []string
            LastMetrics []OneMetric
        } {
            userName,
            datetimestring,
            scales,
            last_metrics,
        }

	if err := tmpl.ExecuteTemplate(w, "layout", &data); err != nil {
		logit(err.Error())
		http.Error(w, http.StatusText(500), 500)
	}
}

func main() {
        initDB()
        defer closeDB()
	fs := http.FileServer(http.Dir("static"))
	http.Handle("/static/", http.StripPrefix("/static/", fs))
	http.Handle("/favicon.ico", fs)
	http.HandleFunc("/", serveTemplate)

        http.HandleFunc("/login", loginHandler)
        http.HandleFunc("/reset_password", resetPasswordHandler)
        http.HandleFunc("/set_password", setPasswordHandler)
        http.HandleFunc("/logout", logoutHandler)
        http.HandleFunc("/confirm", confirmHandler)
        http.HandleFunc("/metrics", metricsHandler)
        http.HandleFunc("/lastmetrics", lastmetricsHandler)
        http.HandleFunc("/save_scale_settings", save_scale_settingsHandler)

	logit("Starting Web Application...")
	http.ListenAndServe("127.0.0.1:4000", nil)
	logit("Terminating Web Application...")
}