package users

import (
	"fmt"
	"net/http"

	"github.com/gorilla/Schema"
	"github.com/kr/pretty"

	"gitlab.quimbo.fr/odwrtw/canape-sql/auth"
	"gitlab.quimbo.fr/odwrtw/canape-sql/config"
	"gitlab.quimbo.fr/odwrtw/canape-sql/web"
)

// LoginHandler login user
func LoginHandler(e *web.Env, w http.ResponseWriter, r *http.Request) error {
	if r.Method == "GET" {
		return e.Rends(w, r, "users/login")
	}

	type loginForm struct {
		Username string
		Password string
	}

	err := r.ParseForm()
	if err != nil {
		return err
	}

	form := new(loginForm)
	decoder := schema.NewDecoder()
	err = decoder.Decode(form, r.PostForm)
	if err != nil {
		return err
	}

	err = e.Auth.Login(w, r, form.Username, form.Password)
	if err != nil {
		if err == auth.ErrInvalidPassword || err == ErrUnknownUser {
			web.SetData(r, "FormErrors", "Error invalid user or password")
			return e.Rends(w, r, "users/login")
		}
		return err
	}

	path, err := auth.GetPostLoginRedirect(e.Auth, w, r)
	if err != nil {
		return err
	}
	if path != "" {
		http.Redirect(w, r, path, http.StatusTemporaryRedirect)
		return nil
	}
	http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
	return nil
}

// LogoutHandler just logout
func LogoutHandler(e *web.Env, w http.ResponseWriter, r *http.Request) error {
	e.Auth.Logout(w, r)
	route := e.GetLoginRouteGetter()()
	http.Redirect(w, r, route, http.StatusTemporaryRedirect)
	return nil
}

// DetailsHandler show user details
func DetailsHandler(e *web.Env, w http.ResponseWriter, r *http.Request) error {
	v := auth.GetCurrentUser(r)
	user, ok := v.(*User)
	if !ok {
		return fmt.Errorf("invalid user type")
	}

	var polochonConfig config.UserPolochon
	err := user.GetConfig("polochon", &polochonConfig)
	if err != nil {
		return err
	}

	web.SetData(r, "user", user)
	web.SetData(r, "polochon", polochonConfig)
	return e.Rends(w, r, "users/details")
}

// EditHandler allow editing user info and configuration
func EditHandler(e *web.Env, w http.ResponseWriter, r *http.Request) error {
	v := auth.GetCurrentUser(r)
	user, ok := v.(*User)
	if !ok {
		return fmt.Errorf("invalid user type")
	}
	var polochonConfig config.UserPolochon
	err := user.GetConfig("polochon", &polochonConfig)
	if err != nil {
		return err
	}

	if r.Method == "GET" {
		web.SetData(r, "user", user)
		web.SetData(r, "polochon", polochonConfig)
		return e.Rends(w, r, "users/edit")
	}

	type editForm struct {
		PolochonURL    string
		PolochonToken  string
		Password       string
		PasswordVerify string
	}

	err = r.ParseForm()
	if err != nil {
		return err
	}

	form := new(editForm)
	decoder := schema.NewDecoder()
	err = decoder.Decode(form, r.PostForm)
	if err != nil {
		return err
	}

	polochonConfig.URL = form.PolochonURL
	polochonConfig.Token = form.PolochonToken

	err = user.SetConfig("polochon", polochonConfig)
	if err != nil {
		return err
	}

	if form.Password != "" || form.PasswordVerify != "" {
		if form.Password != form.PasswordVerify {
			// TODO: manage form error
		}
		user.Hash, err = e.Auth.GenHash(form.Password)
		if err != nil {
			return err
		}
	}

	err = user.Update(e.Database)
	if err != nil {
		pretty.Println(err)
		return err
	}

	err = e.Auth.RegenSecret(user, w, r)
	if err != nil {
		return err
	}

	url, err := e.GetURL("users.details")
	if err != nil {
		return err
	}

	http.Redirect(w, r, url, http.StatusTemporaryRedirect)
	return nil
}