package webserver

import (
	"net/http"
	"strings"
	"text/template"
)

type LoginPageData struct {
	IsHiddenClassList string
	LoginData         CustomizableLoginData
}
type AuthStyle int

const (
	AuthStylePassword AuthStyle = 0
	AuthStyleOAuth    AuthStyle = 1
)

type AuthData interface{}

type PasswordAuthData struct {
	Username string
	Password string
}

type OAuthAuthData struct {
	Username string
	Password string
}

type CustomizableLoginData struct {
	ServiceName         string
	AuthRequestFunction func(AuthStyle, AuthData) bool
}

var LoginPageDataCustomizations CustomizableLoginData

func loginHandler(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "text/html; charset=utf-8")
	tmpl := template.Must(template.ParseFiles("webserver/pages/login_page.html"))
	if r.Method == http.MethodGet {
		tmpl.Execute(w, LoginPageData{IsHiddenClassList: "hidden", LoginData: LoginPageDataCustomizations})
		return
	}

	if r.Method == http.MethodPost {
		action := r.FormValue("action")

		if action == "password" {
			username := r.FormValue("username")
			if strings.Contains(username, "/") {
				tmpl.Execute(w, LoginPageData{IsHiddenClassList: "", LoginData: LoginPageDataCustomizations})
			}
			password := r.FormValue("password")

			auth_success := LoginPageDataCustomizations.AuthRequestFunction(AuthStylePassword, PasswordAuthData{
				Username: username,
				Password: password,
			})
			if auth_success == false {
				tmpl.Execute(w, LoginPageData{IsHiddenClassList: "", LoginData: LoginPageDataCustomizations})
			}
		} else {
			auth_success := LoginPageDataCustomizations.AuthRequestFunction(AuthStyleOAuth, OAuthAuthData{})
			if auth_success == false {
				tmpl.Execute(w, LoginPageData{IsHiddenClassList: "", LoginData: LoginPageDataCustomizations})
			}
		}
	}
}