package main

import (
	"errors"
	"fmt"
	"net/http"
	"strings"

	"github.com/gorilla/mux"
)

func handleUserRequest(w http.ResponseWriter, req *http.Request) {
	page := initPageData(w, req)

	vars := mux.Vars(req)
	f, fOk := vars["function"]
	if fOk && f == "login" {
		handleUserLogin(page)
		return
	}

	if !page.LoggedIn {
		page.SubTitle = "ribbit login"
		page.show("login.html")
		return
	}
	switch f {
	case "feeds":
		handleUserFeeds(page)
	case "updatesubscriptions":
		handleUpdateUserSubs(page)
	default:
		handleUserDashboard(page)
	}
}

func handleUserLoginForm(page *pageData) {
	page.SubTitle = "ribbit login"
	page.show("login.html")
}

func handleUserLogin(page *pageData) {
	var err error
	var u *User
	if page.LoggedIn {
		redirect("/", page.session.w, page.session.req)
	}
	email := page.session.req.FormValue("email")

	if u, err = m.GetUserByEmail(email); err != nil {
		page.session.setFlashMessage("Invalid Login", "error")
		redirect("/", page.session.w, page.session.req)
		return
	}

	password := page.session.req.FormValue("password")
	fmt.Println("Hitting func")
	if err := doLogin(u.Uuid, password); err != nil {
		fmt.Println("Login Failure: ", err.Error())
		page.session.setFlashMessage("Invalid Login", "error")
	} else {
		page.session.setStringValue("id", u.Uuid)
	}
	redirect("/", page.session.w, page.session.req)
}

// doLogin attempts to log in with the given email/password
// If it can't, it returns an error
func doLogin(uid, password string) error {
	if strings.TrimSpace(uid) != "" && strings.TrimSpace(password) != "" {
		return m.checkCredentials(uid, password)
	}
	return errors.New("Invalid Credentials")
}

func handleUserDashboard(page *pageData) {
	page.SubTitle = "dashboard"
	page.show("user_dashboard.html")
}

func handleUserFeeds(page *pageData) {
	page.SubTitle = "feeds"
	type feedsPageData struct {
		User        *User
		FeedSources []FeedSource
	}
	fpd := new(feedsPageData)
	fpd.FeedSources = m.FeedSources
	id, err := page.session.getStringValue("id")
	if err != nil {
		userError(page.session.w)
		return
	}
	fpd.User, err = m.GetUser(id)
	if err != nil {
		userError(page.session.w)
		return
	}
	page.TemplateData = fpd
	page.show("user_feeds.html")
}

func handleUpdateUserSubs(page *pageData) {
	subs := page.session.req.FormValue("user_feeds")
	fmt.Println(subs)
	subPts := strings.Split(subs, ",")
	var userSubs []string
	for i := range subPts {
		subPts[i] = strings.TrimSpace(subPts[i])
		if subPts[i] != "" {
			userSubs = append(userSubs, subPts[i])
		}
	}
	id, err := page.session.getStringValue("id")
	if err != nil {
		userError(page.session.w)
		return
	}
	var u *User
	u, err = m.GetUser(id)
	u.SubSlugs = userSubs
	m.SaveUser(u)

	redirect("/user/dashboard", page.session.w, page.session.req)
}