package main

import (
	"bitbucket.org/hackerbots/bot"
	"code.google.com/p/go.net/websocket"
	"encoding/json"
	"errors"
	"flag"
	"fmt"
	"log"
	"net/http"
)

func connect() (*websocket.Conn, error) {
	origin := "http://localhost/"
	url := "ws://localhost:8666/ws/"
	return websocket.Dial(url, "", origin)
}

func createGame() (string, error) {
	resp, err := http.Get("http://localhost:8666/game/start/")
	if err != nil {
		return "", err
	}
	defer resp.Body.Close()

	var g struct {
		Id string `json:"id"`
	}
	if err := json.NewDecoder(resp.Body).Decode(&g); err != nil {
		return "", err
	}
	return g.Id, err
}

func negociate(ws *websocket.Conn, gameid string) (err error) {
	log.Printf("trying to connect to game %s", gameid)
	err = websocket.JSON.Send(ws, bot.GameID{
		gameid,
	})
	if err != nil {
		return err
	}

	var idreq bot.IdRequest
	err = websocket.JSON.Receive(ws, &idreq)
	if err != nil || idreq.Type == "failure" {
		return errors.New(fmt.Sprintf("failure: %+v", idreq))
	}
	log.Printf("%+v", idreq)

	err = websocket.JSON.Send(ws, bot.ClientID{
		Name:      "smcquay test robot 2",
		Useragent: "gobot",
		Type:      "robot",
	})
	if err != nil {
		return err
	}

	var gameparam bot.GameParam
	err = websocket.JSON.Receive(ws, &gameparam)
	log.Printf("gameparam: %+v", gameparam)
	if gameparam.Type != "gameparam" {
		return errors.New("didn't receive a good gameparam")
	}
	log.Printf("%+v", gameparam)

	err = websocket.JSON.Send(ws, &bot.Config{
		gameid,
		bot.Stats{
			// TODO: make these flags
			Hp:            200,
			Speed:         100,
			WeaponRadius:  50,
			ScannerRadius: 50,
		},
	})

	var handshake bot.Handshake
	websocket.JSON.Receive(ws, &handshake)
	if !handshake.Success {
		return errors.New("failed to validate correct stats request")
	}
	log.Printf("%+v", handshake)
	return err
}

func main() {
	var err error
	var gameid string
	flag.Parse()
	if flag.NArg() < 1 {
		gameid, err = createGame()
		if err != nil {
			log.Fatal(err)
		}
	} else {
		gameid = flag.Arg(0)
	}

	ws, err := connect()
	if err != nil {
		log.Fatal(err)
	}
	if err = negociate(ws, gameid); err != nil {
		log.Fatal(err)
	}

	for {
		var boardstate bot.Boardstate
		err = websocket.JSON.Receive(ws, &boardstate)
		if err != nil {
			log.Fatal("Connection lost")
		}
		// log.Printf("%+v", boardstate)
		// TODO: logic
		// TODO: send instructions
	}
}