package handler

import (
	"me-fit/handler/middleware"
	"me-fit/log"
	"me-fit/service"
	"me-fit/template/workout"
	"me-fit/utils"

	"net/http"
	"strconv"
	"time"
)

type Workout interface {
	Handle(router *http.ServeMux)
}

type WorkoutImpl struct {
	service service.Workout
	auth    service.Auth
	render  *Render
}

func NewWorkout(service service.Workout, auth service.Auth, render *Render) Workout {
	return WorkoutImpl{
		service: service,
		auth:    auth,
		render:  render,
	}
}

func (handler WorkoutImpl) Handle(router *http.ServeMux) {
	router.Handle("/workout", handler.handleWorkoutPage())
	router.Handle("POST /api/workout", handler.handleAddWorkout())
	router.Handle("GET /api/workout", handler.handleGetWorkout())
	router.Handle("DELETE /api/workout/{id}", handler.handleDeleteWorkout())
}

func (handler WorkoutImpl) handleWorkoutPage() http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		session := middleware.GetSession(r)
		if session == nil {
			utils.DoRedirect(w, r, "/auth/signin")
			return
		}

		currentDate := time.Now().Format("2006-01-02")
		comp := workout.WorkoutComp(currentDate)
		handler.render.RenderLayout(r, w, comp, session.User)
	}
}

func (handler WorkoutImpl) handleAddWorkout() http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		session := middleware.GetSession(r)
		if session == nil {
			utils.DoRedirect(w, r, "/auth/signin")
			return
		}

		var dateStr = r.FormValue("date")
		var typeStr = r.FormValue("type")
		var setsStr = r.FormValue("sets")
		var repsStr = r.FormValue("reps")

		wo := service.NewWorkoutDto("", dateStr, typeStr, setsStr, repsStr)
		wo, err := handler.service.AddWorkout(session.User, wo)
		if err != nil {
			utils.TriggerToast(w, r, "error", "Invalid input values")
			http.Error(w, "Invalid input values", http.StatusBadRequest)
			return
		}
		wor := workout.Workout{Id: wo.RowId, Date: wo.Date, Type: wo.Type, Sets: wo.Sets, Reps: wo.Reps}

		comp := workout.WorkoutItemComp(wor, true)
		handler.render.Render(r, w, comp)
	}
}

func (handler WorkoutImpl) handleGetWorkout() http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		session := middleware.GetSession(r)
		if session == nil {
			utils.DoRedirect(w, r, "/auth/signin")
			return
		}

		workouts, err := handler.service.GetWorkouts(session.User)
		if err != nil {
			return
		}

		wos := make([]workout.Workout, 0)
		for _, wo := range workouts {
			wos = append(wos, workout.Workout{Id: wo.RowId, Date: wo.Date, Type: wo.Type, Sets: wo.Sets, Reps: wo.Reps})
		}

		comp := workout.WorkoutListComp(wos)
		handler.render.Render(r, w, comp)
	}
}

func (handler WorkoutImpl) handleDeleteWorkout() http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		session := middleware.GetSession(r)
		if session == nil {
			utils.DoRedirect(w, r, "/auth/signin")
			return
		}

		rowId := r.PathValue("id")
		if rowId == "" {
			http.Error(w, "Missing required fields", http.StatusBadRequest)
			log.Warn("Missing required fields for workout delete")
			utils.TriggerToast(w, r, "error", "Missing ID field")
			return
		}

		rowIdInt, err := strconv.Atoi(rowId)
		if err != nil {
			http.Error(w, "Invalid ID", http.StatusBadRequest)
			log.Warn("Invalid ID for workout delete")
			utils.TriggerToast(w, r, "error", "Invalid ID")
			return
		}

		err = handler.service.DeleteWorkout(session.User, rowIdInt)
		if err != nil {
			http.Error(w, "Internal Server Error", http.StatusInternalServerError)
			log.Error("Could not delete workout: %v", err.Error())
			utils.TriggerToast(w, r, "error", "Internal Server Error")
			return
		}
	}
}