package web

import (
	"fmt"
	"net/http"
	"net/url"

	"uPortal/internal/auth"

	"github.com/mileusna/useragent"
)

func (s *WebService) HandleSessions(w http.ResponseWriter, r *http.Request) {
	data, ok := s.basicViewData(w, r, "Sessions")
	if !ok {
		http.Redirect(w, r, "/signin", http.StatusSeeOther)
		return
	}

	sessions, err := s.auths.GetSessionByUserId(r.Context(), data.User.Id, 100, 0)
	if err != nil {
		s.log.Error("failed to get sessions: %v", err)
		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
		return
	}
	for _, session := range sessions {
		ua := useragent.Parse(session.Device)
		var class string
		if ua.Mobile {
			class = "Mobile"
		}
		if ua.Tablet {
			class = "Tablet"
		}
		if ua.Desktop {
			class = "Desktop"
		}
		if ua.Bot {
			class = "Bot"
		}

		newSession := auth.Session{
			Device: fmt.Sprintf("%s, %s %s, %s %s %s", class, ua.Name, ua.Version, ua.OS, ua.OSVersion, ua.Device),
			Address: session.Address,
			Token: session.Token,
			CreatedAt: session.CreatedAt,
			ExpiresAt: session.ExpiresAt,
			UserId: session.UserId,
		}
		data.Sessions = append(data.Sessions, newSession)
	}
	s.render(w, r, "session/view.html", data)
}

func (s *WebService) HandleSessionEnd(w http.ResponseWriter, r *http.Request) {
	if err := auth.ValidateCsrf(r, CsrfCookieName, CsrfFieldName); err != nil {
		http.Redirect(w, r, "/sessions", http.StatusSeeOther)
		return
	}

	currentUser, err := s.currentUser(r)
	if err != nil {
		http.Redirect(w, r, "/signin", http.StatusSeeOther)
		return
	}

	token := r.FormValue("token")
	if token == "" {
		http.Redirect(w, r, "/sessions", http.StatusSeeOther)
		return
	}

	session, err := s.auths.GetSessionByToken(r.Context(), token)
	if err != nil {
		http.Redirect(w, r, "/sessions", http.StatusSeeOther)
		return
	}

	if session.UserId == currentUser.Id {
		_ = s.auths.DeleteSessionByTokenAndUserId(r.Context(), token, currentUser.Id)
	} else if currentUser.SuperUser {
		_ = s.auths.DeleteSession(r.Context(), token)
	} else {
		http.Error(w, "Forbidden", http.StatusForbidden)
		return
	}

	http.Redirect(w, r, "/sessions", http.StatusSeeOther)
}

func (s *WebService) HandleSessionEndAll(w http.ResponseWriter, r *http.Request) {
	if err := auth.ValidateCsrf(r, CsrfCookieName, CsrfFieldName); err != nil {
		http.Redirect(w, r, "/sessions", http.StatusSeeOther)
		return
	}

	u, err := s.currentUser(r)
	if err != nil {
		http.Redirect(w, r, "/signin?redirect="+url.PathEscape(r.URL.RequestURI()), http.StatusSeeOther)
		return
	}

	_ = s.auths.DeleteSessionsByUserId(r.Context(), u.Id)
	http.Redirect(w, r, "/sessions", http.StatusSeeOther)
}