package main

import (
    "crypto/md5"
    "fmt"
    "html/template"
    "io"
    "log"
    "net/http"
    "os"
    "strconv"
    "time"

    "github.com/gorilla/mux"
)

func createToken() string {
    crutime := time.Now().Unix()
    h := md5.New()
    io.WriteString(h, strconv.FormatInt(crutime, 10))
    token := fmt.Sprintf("%x", h.Sum(nil))
    return token
}

func loginHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Println("method:", r.Method)
    if r.Method == "GET" {
        token := createToken()

        t, _ := template.ParseFiles("templates/login.html")
        t.Execute(w, token)
    } else {
        // log in request
        r.ParseForm()
        token := r.Form.Get("token")
        if token != "" {
            // check token validity
        } else {
            // give error if no token
        }
        username := template.HTMLEscapeString(r.Form.Get("username"))
        password := template.HTMLEscapeString(r.Form.Get("password"))
        log.Printf("new login: %s %s", username, password)
        template.HTMLEscape(w, []byte(r.Form.Get("username")))
    }
}

func uploadHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Println("method:", r.Method)
    if r.Method == "GET" {
        token := createToken()

        t, _ := template.ParseFiles("templates/upload.html")
        t.Execute(w, token)
    } else {
        file, handler, err := r.FormFile("uploadfile")
        if err != nil {
            log.Println(err)
            return
        }
        defer file.Close()

        out, err := os.Create("uploaded/" + handler.Filename)
        if err != nil {
            log.Println(err)
            return
        }
        defer out.Close()

        // write the content from POST to file
        _, err = io.Copy(out, file)
        if err != nil {
            log.Println(err)
            return
        }

        fmt.Fprintf(w, "File uploaded successfully: %v", handler.Filename)
    }
}

func helloHandler(w http.ResponseWriter, r *http.Request) {
    vars := mux.Vars(r)
    name := vars["name"]

    fmt.Fprintln(w, "Hello:", name)
}