package endpoints

import (
	"arbeitszeitmessung/helper"
	"arbeitszeitmessung/models"
	"arbeitszeitmessung/templates"
	"context"
	"errors"
	"log"
	"net/http"
	"strconv"
	"time"
)

func TeamHandler(w http.ResponseWriter, r *http.Request) {
	helper.RequiresLogin(Session, w, r)
	switch r.Method {
	case http.MethodPost:
		submitReport(w, r)
		break
	case http.MethodGet:
		showWeeks(w, r)
		break
	default:
		http.Error(w, "Method not allowed!", http.StatusMethodNotAllowed)
		break
	}
	// user, err := (*models.User).GetUserFromSession(nil, Session, r.Context())
	// if err != nil {
	// 	log.Println("No user found with the given personal number!")
	// 	http.Redirect(w, r, "/user/login", http.StatusSeeOther)
	// 	return
	// }
	// var userWorkDays []models.WorkDay
	// userWorkDays = (*models.WorkDay).GetWorkDays(nil, user.CardUID, time.Date(2025, time.February, 24, 0, 0, 0, 0, time.Local), time.Date(2025, time.February, 24+7, 0, 0, 0, 0, time.Local))
	// log.Println("User:", user)
	// teamMembers, err := user.GetTeamMembers()
	// getWeeksTillNow(time.Now().AddDate(0, 0, -14))
	// templates.TeamPage(teamMembers, userWorkDays).Render(r.Context(), w)
}

func submitReport(w http.ResponseWriter, r *http.Request) {
	err := r.ParseForm()
	if err != nil {
		log.Println("Error parsing form", err)
		return
	}
	userPN, _ := strconv.Atoi(r.FormValue("user"))
	_weekTs := r.FormValue("week")
	weekTs, err := time.Parse(time.DateOnly, _weekTs)
	user, err := (*models.User).GetByPersonalNummer(nil, userPN)
	workWeek := (*models.WorkWeek).GetWeek(nil, user, weekTs, false)

	if err != nil {
		log.Println("Could not get user!")
		return
	}

	switch r.FormValue("method") {
	case "send":
		err = workWeek.Send()
		break
	case "accept":
		err = workWeek.Accept()
		break
	default:
		break
	}
	if errors.Is(err, models.ErrRunningWeek) {
		showWeeks(w, r.WithContext(context.WithValue(r.Context(), "error", true)))
	}
	showWeeks(w, r)
}

func showWeeks(w http.ResponseWriter, r *http.Request) {
	user, err := (*models.User).GetUserFromSession(nil, Session, r.Context())
	if err != nil {
		log.Println("No user found with the given personal number!")
		http.Redirect(w, r, "/user/login", http.StatusSeeOther)
		return
	}
	submissionDate := r.URL.Query().Get("submission_date")
	lastSub := user.GetLastSubmission()
	if submissionDate != "" {
		submissionDate, err := time.Parse("2006-01-02", submissionDate)
		if err == nil {
			lastSub = getMonday(submissionDate)
		}
	}
	userWeek := (*models.WorkWeek).GetWeek(nil, user, lastSub, true)

	var workWeeks []models.WorkWeek
	teamMembers, err := user.GetTeamMembers()
	for _, member := range teamMembers {
		weeks := (*models.WorkWeek).GetSendWeeks(nil, member)
		workWeeks = append(workWeeks, weeks...)
	}
	// isRunningWeek := time.Since(lastSub) < 24*5*time.Hour //the last submission is this week and cannot be send yet
	templates.TeamPage(workWeeks, userWeek).Render(r.Context(), w)
}

func getWeeksTillNow(lastWeek time.Time) []time.Time {
	var weeks []time.Time
	if lastWeek.After(time.Now()) {
		log.Println("Timestamp is after today, no weeks till now!")
		return weeks
	}
	if lastWeek.Weekday() != time.Monday {
		if lastWeek.Weekday() == time.Sunday {
			lastWeek = lastWeek.AddDate(0, 0, -6)
		} else {
			lastWeek = lastWeek.AddDate(0, 0, -int(lastWeek.Weekday()-1))
		}
	}
	if time.Since(lastWeek) < 24*5*time.Hour {
		log.Println("Timestamp in running week, cannot split!")
	}

	for t := lastWeek; t.Before(time.Now()); t = t.Add(7 * 24 * time.Hour) {
		weeks = append(weeks, t)
	}
	log.Println(weeks)
	return weeks
}

func getMonday(ts time.Time) time.Time {
	if ts.Weekday() != time.Monday {
		if ts.Weekday() == time.Sunday {
			ts = ts.AddDate(0, 0, -6)
		} else {
			ts = ts.AddDate(0, 0, -int(ts.Weekday()-1))
		}
	}
	return ts
}