package routes

import (
	"github.com/gorilla/mux"
	conf "github.com/muety/wakapi/config"
	"github.com/muety/wakapi/middlewares"
	"github.com/muety/wakapi/models"
	"github.com/muety/wakapi/models/view"
	"github.com/muety/wakapi/services"
	"net/http"
)

type LeaderboardHandler struct {
	config             *conf.Config
	userService        services.IUserService
	leaderboardService services.ILeaderboardService
}

func NewLeaderboardHandler(userService services.IUserService, leaderboardService services.ILeaderboardService) *LeaderboardHandler {
	return &LeaderboardHandler{
		config:             conf.Get(),
		userService:        userService,
		leaderboardService: leaderboardService,
	}
}

func (h *LeaderboardHandler) RegisterRoutes(router *mux.Router) {
	r := router.PathPrefix("/leaderboard").Subrouter()
	r.Use(
		middlewares.NewAuthenticateMiddleware(h.userService).
			WithRedirectTarget(defaultErrorRedirectTarget()).
			WithOptionalFor([]string{"/"}).
			Handler,
	)
	r.Methods(http.MethodGet).HandlerFunc(h.GetIndex)
}

func (h *LeaderboardHandler) GetIndex(w http.ResponseWriter, r *http.Request) {
	if h.config.IsDev() {
		loadTemplates()
	}
	templates[conf.LeaderboardTemplate].Execute(w, h.buildViewModel(r))
}

func (h *LeaderboardHandler) buildViewModel(r *http.Request) *view.LeaderboardViewModel {
	user := middlewares.GetPrincipal(r)

	itemsGeneral, err := h.leaderboardService.GetByInterval(models.IntervalPast7Days)
	if err != nil {
		conf.Log().Request(r).Error("error while fetching general leaderboard items - %v", err)
		return &view.LeaderboardViewModel{Error: criticalError}
	}

	by := models.SummaryLanguage
	itemsByLanguage, err := h.leaderboardService.GetAggregatedByInterval(models.IntervalPast7Days, &by)
	if err != nil {
		conf.Log().Request(r).Error("error while fetching general leaderboard items - %v", err)
		return &view.LeaderboardViewModel{Error: criticalError}
	}

	var apiKey string
	if user != nil {
		apiKey = user.ApiKey
	}

	return &view.LeaderboardViewModel{
		User:            user,
		Items:           itemsGeneral,
		ItemsByLanguage: itemsByLanguage,
		ApiKey:          apiKey,
		Success:         r.URL.Query().Get("success"),
		Error:           r.URL.Query().Get("error"),
	}
}