package main

import (
	"bitbucket.org/hackerbots/vector"
	"code.google.com/p/go.net/websocket"
	"errors"
	"flag"
	"fmt"
	"log"
	"math/rand"
	"time"
)

var hp = flag.Int("hp", 50, "")
var speed = flag.Int("speed", 50, "")
var acceleration = flag.Int("acceleration", 50, "")
var weaponRadius = flag.Int("wrad", 50, "weapon radius")
var scannerRadius = flag.Int("srad", 50, "scanner radius")
var fireRate = flag.Int("fire-rate", 50, "scanner radius")

var server = flag.String("server", "hackerbots.us", "server hostname")
var port = flag.Int("port", 8666, "server port")
var botname = flag.String("name", "gobot", "the name that other players will see")
var verbose = flag.Bool("verbose", false, "run verbosly")

type infos struct {
	id            string
	width, height float32
}

func connect() (*websocket.Conn, error) {
	origin := "http://localhost/"
	url := fmt.Sprintf("ws://%s:%d/ws/", *server, *port)
	return websocket.Dial(url, "", origin)
}

func negociate(ws *websocket.Conn, gameid string) (i *infos, err error) {
	log.Printf("trying to connect to game %s", gameid)
	err = websocket.JSON.Send(ws, struct {
		Id string `json:"id"`
	}{
		gameid,
	})
	if err != nil {
		return nil, err
	}

	var idreq struct {
		Type       string `json:"type"`
		AssignedID string `json:"id"`
	}
	err = websocket.JSON.Receive(ws, &idreq)
	if err != nil || idreq.Type == "failure" {
		return nil, errors.New(fmt.Sprintf("failure: %+v", idreq))
	}
	log.Printf("idreq: %+v", idreq)

	err = websocket.JSON.Send(ws, struct {
		Type      string `json:"type"`
		Name      string `json:"name"`
		Useragent string `json:"useragent"`
	}{
		Name:      *botname,
		Useragent: "gobot",
		Type:      "robot",
	})
	if err != nil {
		return nil, err
	}

	type BoardSize struct {
		Width  float32 `json:"width"`
		Height float32 `json:"height"`
	}
	var gameparam struct {
		BoardSize BoardSize `json:"boardsize"`

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

	conf := ClientConfig{
		ID: gameid,
		Stats: map[string]StatsRequest{
			*botname: StatsRequest{
				Hp:            *hp,
				Speed:         *speed,
				Acceleration:  *acceleration,
				WeaponRadius:  *weaponRadius,
				ScannerRadius: *scannerRadius,
				TurnSpeed:     50,
				FireRate:      *fireRate,
				WeaponDamage:  50,
				WeaponSpeed:   50,
			},
		},
	}

	err = websocket.JSON.Send(ws, conf)

	var handshake struct {
		ID      string `json:"id"`
		Success bool   `json:"success"`
		Type    string `json:"type"`
	}
	websocket.JSON.Receive(ws, &handshake)
	if !handshake.Success {
		return nil, errors.New("failed to validate correct stats request")
	}
	log.Printf("handshake: %+v", handshake)
	return &infos{
		id:     idreq.AssignedID,
		width:  gameparam.BoardSize.Width,
		height: gameparam.BoardSize.Height,
	}, err
}

func main() {
	rand.Seed(time.Now().UnixNano())
	var err error
	var gameid string
	flag.Parse()
	if flag.NArg() < 1 {
		gameid = "debug"
	} else {
		gameid = flag.Arg(0)
	}

	ws, err := connect()
	if err != nil {
		log.Fatal(err)
	}
	boardInfo, err := negociate(ws, gameid)
	log.Printf("boardInfo: %+v", boardInfo)
	if err != nil {
		log.Fatal(err)
	}

	// TODO: var target govector.Point2d
	moveto := govector.Point2d{
		X: rand.Float32() * boardInfo.width,
		Y: rand.Float32() * boardInfo.height,
	}
	log.Printf("moveto: %+v", moveto)

	var me Robot

	log.Printf("negociated well, starting loop")
	for {
		var boardstate Boardstate
		err = websocket.JSON.Receive(ws, &boardstate)
		// log.Printf("%#v", boardstate)
		if *verbose {
			log.Printf("%+v", boardstate)
		}
		if err != nil {
			log.Fatal("Connection lost")
		}
		me = boardstate.MyRobots[0]
		log.Printf("%+v", me)
		if govector.Distance(me.Position, moveto) < 3.0 {
			log.Printf("old: %+v: %+v", me.Position, moveto)
			moveto = govector.Point2d{
				X: rand.Float32() * boardInfo.width,
				Y: rand.Float32() * boardInfo.height,
			}
			log.Printf("new: %+v: %+v", me.Position, moveto)
		}

		// TODO: send instructions
		instruction := map[string]Instruction{
			me.Id: {
				MoveTo: &moveto,
				FireAt: &moveto,
			},
		}
		log.Printf("instruction: %+v", instruction)
		err = websocket.JSON.Send(ws, instruction)
		if err != nil {
			log.Fatal(err)
		}
		//log.Fatal("WIP")
	}
}