package frontend

import (
	"html/template"
	"log"
	"net/http"
	"time"

	b "streifling.com/jason/cpolis/cmd/backend"
)

func HomePage(c *b.Config, db *b.DB, s map[string]*Session) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		numRows, err := db.CountEntries("users")
		if err != nil {
			log.Fatalln(err)
		}

		data := new(struct {
			*UserHTMLData
			Version string
		})
		data.UserHTMLData = &UserHTMLData{User: new(b.User)}
		data.Version = c.Version

		files := make([]string, 2)
		files[0] = c.WebDir + "/templates/index.html"
		if numRows == 0 {
			data.Role = b.NonExistent
			data.Title = "Erster Benutzer (Administrator)"
			data.ButtonText = "Anlegen"
			data.URL = "/user/add-first"

			files[1] = c.WebDir + "/templates/edit-user.html"
			tmpl, err := template.ParseFiles(files...)
			if err = template.Must(tmpl, err).Execute(w, data); err != nil {
				log.Println(err)
				http.Error(w, err.Error(), http.StatusInternalServerError)
				return
			}
		} else {
			cookie, err := r.Cookie("cpolis_session")
			if err != nil {
				files[1] = c.WebDir + "/templates/login.html"
				tmpl, err := template.ParseFiles(files...)
				if err = template.Must(tmpl, err).Execute(w, data); err != nil {
					log.Println(err)
					http.Error(w, err.Error(), http.StatusInternalServerError)
					return
				}
				return
			}

			session, ok := s[cookie.Value]
			if !ok {
				cookie.Expires = time.Now()
				http.SetCookie(w, cookie)

				files[1] = c.WebDir + "/templates/login.html"
				tmpl, err := template.ParseFiles(files...)
				if err = template.Must(tmpl, err).Execute(w, data); err != nil {
					log.Println(err)
					http.Error(w, err.Error(), http.StatusInternalServerError)
					return
				}
				return
			}

			data.Role = session.User.Role
			files[1] = c.WebDir + "/templates/hub.html"
			tmpl, err := template.ParseFiles(files...)
			if err = template.Must(tmpl, err).Execute(w, data); err != nil {
				log.Println(err)
				http.Error(w, err.Error(), http.StatusInternalServerError)
				return
			}
		}
	}
}

func ShowHub(c *b.Config, db *b.DB, s map[string]*Session) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		session, err := ManageSession(w, r, c, s)
		if err != nil {
			http.Error(w, "Die Session ist abgelaufen. Bitte erneut anmelden.", http.StatusUnauthorized)
			return
		}

		data := new(struct{ Role int })
		data.Role = session.User.Role

		tmpl, err := template.ParseFiles(c.WebDir + "/templates/hub.html")
		if err = template.Must(tmpl, err).ExecuteTemplate(w, "page-content", data); err != nil {
			log.Println(err)
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
	}
}