package main

import (
  "encoding/json"
  "flag"
  "fmt"
  "net/http"

  "github.com/zenazn/goji"
  "github.com/zenazn/goji/web"
  "github.com/zenazn/goji/web/middleware"
)

func main() {
  goji.Get("/", Root)

  flag.Set("bind", ":8000")
  goji.Serve()
}

type Hello struct {
  Message string
}

func Root(c web.C, w http.ResponseWriter, r *http.Request) {
  w.Header().Set("Content-Type", "application/json")

  i := 0
  if i == 0 {
    ErrorString(c, w, 500, "test 500")
    return
  }

  hello := &Hello{Message: "Hello, world"}

  encoder := json.NewEncoder(w)
  encoder.Encode(hello)
}

func ErrorString(c web.C, w http.ResponseWriter, code int, str string) {
  c.Env["err"] = str
  if code >= 500 {
    errStr := fmt.Sprintf("Internal Error (request ID: %s)", middleware.GetReqID(c))
    http.Error(w, errStr, code)
  } else {
    http.Error(w, str, code)
  }
}