package main

import (
  "fmt"
  "net/http"
  "net/url"

  "github.com/acmacalister/helm"
)

func main() {
  r := helm.New(fallThrough)                         // Our fallthrough route.
  r.Use(fooMiddleware, barMiddleware, helm.Static()) // add global/router level middleware to run on every route.
  r.Handle("GET", "/", root)
  r.Handle("GET", "/users", users, authMiddleware) // local/route specific middleware that only runs on this route.
  r.GET("/users/edit", root)
  r.Handle("GET", "/users/:name", userShow, authMiddleware) // same as above, but with a named param.
  r.Handle("GET", "/users/:name/blog/new", userBlogShow, authMiddleware)
  r.GET("/blogs", blogs) // convenience method for HTTP verb. Beside GET, there is the whole RESTful gang (POST, PUT, PATCH, DELETE, etc)
  r.GET("/blogs/:id", blogShow)
  r.Run(":8080")
}

// Notice the Middleware has a return type. True means go to the next middleware. False
// means to stop right here. If you return false to end the request-response cycle you MUST
// write something back to the client, otherwise it will be left hanging.
func fooMiddleware(w http.ResponseWriter, r *http.Request, params url.Values) bool {
  fmt.Println("Foo!")
  return true
}

func barMiddleware(w http.ResponseWriter, r *http.Request, params url.Values) bool {
  fmt.Println("Bar!")
  return true
}

func authMiddleware(w http.ResponseWriter, r *http.Request, params url.Values) bool {
  fmt.Println("Doing Auth here")
  return true
}

func fallThrough(w http.ResponseWriter, r *http.Request, params url.Values) {
  http.Error(w, "You done messed up A-aron", http.StatusNotFound)
}

func root(w http.ResponseWriter, r *http.Request, params url.Values) {
  w.WriteHeader(200)
  w.Write([]byte("Root!"))
}

func users(w http.ResponseWriter, r *http.Request, params url.Values) {
  fmt.Fprint(w, "Users!\n")
}

func userShow(w http.ResponseWriter, r *http.Request, params url.Values) {
  fmt.Fprintf(w, "Hi %s", params["name"]) // Notice we are able to get the username from the url resource. Quite handy!
}

func userBlogShow(w http.ResponseWriter, r *http.Request, params url.Values) {
  fmt.Fprintf(w, "This is %s Blog", params["name"])
}

func blogs(w http.ResponseWriter, r *http.Request, params url.Values) {
  fmt.Fprint(w, "Blogs!\n")
}

func blogShow(w http.ResponseWriter, r *http.Request, params url.Values) {
  fmt.Fprintf(w, "Blog number: %s", params["id"])
}