package service

import (
	"me-fit/templates"
	"me-fit/utils"

	"database/sql"
	"net/http"
	"strconv"
	"time"

	"github.com/prometheus/client_golang/prometheus"
	"github.com/prometheus/client_golang/prometheus/promauto"
)

var (
	metrics = promauto.NewCounterVec(
		prometheus.CounterOpts{
			Name: "mefit_api_workout_total",
			Help: "The total number of workout api requests processed",
		},
		[]string{"type"},
	)
)

func App(w http.ResponseWriter, r *http.Request) {
	comp := templates.App()
	layout := templates.Layout(comp)
	layout.Render(r.Context(), w)
}

func NewWorkout(db *sql.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		metrics.WithLabelValues("new").Inc()

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

		if dateStr == "" || typeStr == "" || setsStr == "" || repsStr == "" {
			http.Error(w, "Missing required fields", http.StatusBadRequest)
			return
		}

		date, err := time.Parse("2006-01-02", dateStr)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		sets, err := strconv.Atoi(setsStr)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		reps, err := strconv.Atoi(repsStr)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
			return
		}

		//TODO: Ensure auth
		// token := r.Context().Value(middleware.TOKEN_KEY).(*auth.Token)

		_, err = db.Exec("INSERT INTO workout (user_id, date, type, sets, reps) VALUES (?, ?, ?, ?, ?)", "", date, typeStr, sets, reps)

		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
	}
}

func GetWorkouts(db *sql.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		metrics.WithLabelValues("get").Inc()

		// token := r.Context().Value(middleware.TOKEN_KEY).(*auth.Token)
		// var userId = token.UID
		var userId = ""

		rows, err := db.Query("SELECT rowid, date, type, sets, reps FROM workout WHERE user_id = ?", userId)
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}

		var workouts = make([]map[string]interface{}, 0)
		for rows.Next() {
			var id int
			var date string
			var workoutType string
			var sets int
			var reps int

			err = rows.Scan(&id, &date, &workoutType, &sets, &reps)
			if err != nil {
				http.Error(w, err.Error(), http.StatusInternalServerError)
				return
			}

			workout := map[string]interface{}{
				"id":   id,
				"date": date,
				"type": workoutType,
				"sets": sets,
				"reps": reps,
			}
			workouts = append(workouts, workout)
		}

		utils.WriteJSON(w, workouts)
	}
}

func DeleteWorkout(db *sql.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		metrics.WithLabelValues("delete").Inc()

		// token := r.Context().Value(middleware.TOKEN_KEY).(*auth.Token)
		// var userId = token.UID
		var userId = ""

		rowId := r.FormValue("id")
		if rowId == "" {
			http.Error(w, "Missing required fields", http.StatusBadRequest)
			return
		}

		_, err := db.Exec("DELETE FROM workout WHERE user_id = ? AND rowid = ?", userId, rowId)
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			return
		}
	}
}