package main

import (
    "net/http"
    "os"
    "fmt"
)

var Version = "0.0.1"

func indexHandler(w http.ResponseWriter, r *http.Request) {
    w.Write([]byte("<h1>Hello World, im ver:"+Version+" !</h1>"))
}

func healthMessage(w http.ResponseWriter, r *http.Request) {
    w.Header().Add("Content-Type", "application/json")
    w.Write([]byte(`{"health":"OK"}`))
}

func main() {
    port := os.Getenv("PORT")
    if port == "" {
        port = "3000"
    }

    fmt.Print("\nVersion:", Version, ", Im run in http://127.0.0.1:", port)

    mux := http.NewServeMux()
    mux.HandleFunc("/", indexHandler)
    mux.HandleFunc("/health", healthMessage)
    http.ListenAndServe(":"+port, mux)
}