package main

import (
	"fmt"
	"log"
	"io/ioutil"
	"net/http"
	"encoding/json"
	"regexp"
	"strings"
	"flag"
	"os"
)

type JSONdata struct {
	Screen_name string
	User_id string
	Html string

}

func get_user(username string) []byte{
	full_url := fmt.Sprintf("https://twitter.com/i/profiles/popup?screen_name=%s&wants_hovercard=true&_=1438430333863", username)

	client := &http.Client{}
	req, err := http.NewRequest("GET", full_url, nil)
	if err != nil {
		log.Fatal(err)
	}

	resp, err := client.Do(req)
	if err != nil {
		log.Fatal(err)
	}
	defer resp.Body.Close()

	user_data, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		log.Fatal(err)
	}

	return user_data
}

func parse_data(content []byte) {
	j := &JSONdata{}
	err := json.Unmarshal([]byte(content), &j)
	if err != nil {
		log.Fatal(err)
	}

	x := regexp.MustCompile("title=\"(.*) Pengikut\"\n")
	follower := x.FindStringSubmatch(j.Html)[1]

	y := regexp.MustCompile("title=\"(.*) Mengikuti\"\n")
	following := y.FindStringSubmatch(j.Html)[1]

	z := regexp.MustCompile("data-name=\"(.*)\" data-protected=\"false\"\u003e\n\n")
	fullname := z.FindStringSubmatch(j.Html)[1]

	i := regexp.MustCompile("\u003cimg src=\"(.*)\" alt")
	image := strings.Replace(i.FindStringSubmatch(j.Html)[1], "_bigger", "", -1)

	fmt.Printf("screen_name: %s\n", j.Screen_name)
	fmt.Printf("user_id: %s\n", j.User_id)
	fmt.Printf("fullname: %s\n", fullname)
	fmt.Printf("image: %s\n", image)
	fmt.Printf("follower: %s\n", follower)
	fmt.Printf("following: %s\n", following)
}

func main() {
	flag.Parse()

	if flag.NArg() < 1 {
		fmt.Fprintf(os.Stderr, "Usage: %s [twitter_user_name]\n", os.Args[0])
		os.Exit(1)
	}

	username := flag.Arg(0)

	user := get_user(username)
	parse_data(user)
}