/*
 * Sicherheitsunterweisung
 * Copyright (C) 2023  Jason Streifling
 *
 * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package session

import (
	"fmt"
	"html/template"
	"log"
	"net/http"

	"github.com/google/uuid"
	"streifling.com/jason/sicherheitsunterweisung/packages/data"
)

func HandleInternalLogin(db *data.DB, ss *[]*Session, cs chan<- *Session) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		instructors, err := db.GetInstructors()
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
			log.Panicln(err)
		}

		for _, i := range instructors {
			if r.PostFormValue("login") == fmt.Sprint(i.ID) {
				session := Session{
					UUID:       uuid.New(),
					Instructor: *i,
					Briefings:  make([]*Briefing, 0),
				}
				(*ss) = append((*ss), &session)
				cs <- &session

				data := tableHTMLData{SessionID: session.UUID}
				data.OTD, err = db.GetAllOverviewTableData()
				if err != nil {
					http.Error(w, err.Error(), http.StatusInternalServerError)
					log.Panicln(err)
				}

				template.Must(template.ParseFiles("templates/table.html")).ExecuteTemplate(w, "content", data)
				return
			}
		}
		template.Must(template.ParseFiles("templates/login.html")).ExecuteTemplate(w, "content", nil)
	}
}

func findCorrectLogin(l string, ss *[]*Session) (*Briefing, *Participant, bool) {
	for _, s := range *ss {
		for _, b := range s.Briefings {
			for _, p := range b.Participants {
				if l == p.Login {
					return b, p, true
				}
			}
		}
	}
	return nil, nil, false
}

func HandleExternalLogin(ss *[]*Session) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		briefing, participant, loginCorrect := findCorrectLogin(r.PostFormValue("login"), ss)
		if loginCorrect {
			data := participantHTMLData{
				BriefingID:  briefing.UUID,
				Participant: Participant{Login: participant.Login},
			}

			template.Must(template.ParseFiles("templates/participant.html")).ExecuteTemplate(w, "content", data)
		} else {
			template.Must(template.ParseFiles("templates/login.html")).ExecuteTemplate(w, "content", nil)
		}
	}
}