package main

import (
	"flag"
	"fmt"
	"log"
	"math/rand"
	"net/http"
	"strconv"

	"github.com/jzelinskie/geddit"
)

const version = 1.0

var clientID = flag.String("id", "", "Client ID")
var clientSecret = flag.String("secret", "", "Client Secret")
var baseAddr = flag.String("url", "127.0.0.1:9595", "Base address")

var o *geddit.OAuthSession

func main() {
	flag.Parse()
	log.Printf("BeeBot v%.2f", version)

	var err error

	o, err = geddit.NewOAuthSession(
		*clientID,
		*clientSecret,
		"BeeBot",
		fmt.Sprintf("http://%s/cb", *baseAddr),
	)
	if err != nil {
		log.Fatal(1, err)
	}

	state := strconv.Itoa(rand.Intn(10000) * 1000)
	url := o.AuthCodeURL(state, []string{"identity read edit"})
	log.Printf("Visit %s to obtain auth code", url)

	http.HandleFunc("/cb", mkCb(state))
	log.Fatal(http.ListenAndServe(*baseAddr, nil))

}

func mkCb(startState string) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		state := r.URL.Query().Get("state")
		code := r.URL.Query().Get("code")
		if state != startState {
			log.Fatalf("Unexpected state, %s != %s", startState, state)
		}

		err := o.CodeAuth(code)
		if err != nil {
			log.Fatal(2, err)
		}

		me, err := o.AboutRedditor("_beebot_")
		if err != nil {
			log.Fatal(3, err)
		}

		log.Printf("%+v", me)
	}
}