package main

import (
	 "fmt"
	 "log"
    "net/http"
	 "strings"
	 "net"
	 "bufio"
	 //"html"
)

func handler(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
	w.Header().Set("Expires", "0")

	w.Header().Set("Access-Control-Allow-Origin", "*")
	w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
	w.Header().Set("Access-Control-Allow-Headers", "Content-Type")

	fmt.Println(r.URL.Path);
	tmp := strings.Split(r.URL.Path, "/");
	fmt.Println(tmp);
	if tmp[1] == "add" && len(tmp[2]) != 0 {
		add_url := tmp[2];
		fmt.Println(tmp[2]);
		for i := 3; i < len(tmp); i++ {
			fmt.Println(tmp[3]);
			if tmp[i] == "" {
				break
			}
			add_url += "/" + tmp[i]
		}
		fmt.Println("Request add:");
		fmt.Println("Sending a request to add: " + add_url + "...");
		conn, err := net.Dial("tcp", "localhost:5555");
		if err != nil {
			log.Fatal(err);
		}
		defer conn.Close();

		fmt.Fprintf(conn, "{\"type\": 1, \"url\": \"%s\"}", add_url);
		res, _ := bufio.NewReader(conn).ReadBytes('\n');
		fmt.Println(string(res));
		
		w.Write(res);

		return;
	}else if len(tmp[1]) == 6 {
		s := tmp[1];
		fmt.Println(tmp[1]);
		conn, err := net.Dial("tcp", "localhost:5555");
		if err != nil {
			log.Fatal(err);
		}
		defer conn.Close();

		fmt.Println(s);
		fmt.Fprintf(conn, "{\"type\": 2, \"url\": \"%s\"}", s);
		res, _ := bufio.NewReader(conn).ReadBytes('\n');
		fmt.Println(string(res));
		http.Redirect(w, r, string(res), http.StatusPermanentRedirect);

	}else{
		//fmt.Fprintf(w, "oi", r.URL.Path[1:]);
		fs := http.FileServer(http.Dir("../web_page"))
		http.StripPrefix("/", fs).ServeHTTP(w, r)
	}
}

func add_page(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
	w.Header().Set("Expires", "0")
	tmp := strings.Split(r.URL.Path, "/");
	fmt.Println(tmp);
}

func main() {
	/*fmt.Println("Port 5556");
	server := &http.Server{
		Addr: "localhost:5556",
		Handler: http.HandlerFunc(handler),
	};
	server.SetKeepAlivesEnabled(false);*/

	mux := http.NewServeMux();
	mux.HandleFunc("/", handler);
	//mux.HandleFunc("/add", add_page);
	server := &http.Server{
		Addr: "localhost:5556",
		Handler: mux,
	};
	server.SetKeepAlivesEnabled(false);
	fmt.Println("Listen on port 5556");
	
	//http.HandleFunc("/", handler);
	log.Fatal(server.ListenAndServe());
}