/**
 * ProjectLaogai
 *
 * Copyright 2019  <seil0@mosad.xyz>
 *
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 *
 */

package org.mosad.seil0.projectlaogai.fragments

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.LinearLayout
import androidx.fragment.app.Fragment
import org.jetbrains.anko.doAsync
import org.jetbrains.anko.uiThread
import org.mosad.seil0.projectlaogai.R
import org.mosad.seil0.projectlaogai.controller.CacheController.Companion.timetables
import org.mosad.seil0.projectlaogai.hsoparser.DataTypes
import org.mosad.seil0.projectlaogai.hsoparser.NotRetardedCalendar
import org.mosad.seil0.projectlaogai.uicomponents.LessonCardView
import org.mosad.seil0.projectlaogai.uicomponents.LessonTextView
import org.mosad.seil0.projectlaogai.uicomponents.MensaDayCardView
import java.text.SimpleDateFormat
import java.util.*

/**
 * The timetable controller class
 * contains all needed parts to display and the timetable detail screen
 */
class TimeTableFragment : Fragment() {

    private lateinit var linLayoutTTFragment: LinearLayout

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {

        val view: View = inflater.inflate(R.layout.fragment_time_table, container, false)

        linLayoutTTFragment = view.findViewById(R.id.linLayout_TTFragment)

        if (timetables[0].days.isNotEmpty()) {
            addCurrentWeek()
        } else {
            // TODO show card with error msg
        }

        return view
    }

    /**
     * add the remaining days of the current week to the timetable screen
     */
    private fun addCurrentWeek() {
        val dayIndex = NotRetardedCalendar().getDayOfWeekIndex()
        val formatter = SimpleDateFormat("E dd.MM", Locale.GERMANY) // TODO change to android call when min api is 24
        val calendar = Calendar.getInstance()

        doAsync {

            uiThread {

                // add current weeks days
                for (day in dayIndex..5) {
                    val cardViewTimeTableDay = MensaDayCardView(context!!, null)
                    cardViewTimeTableDay.setDayHeading(formatter.format(calendar.time))

                    // for each timeslot of the day
                    for ((i, timeslot) in timetables[0].days[day].timeslots.withIndex()) {
                        val lessonCardView = LessonCardView(context!!, null)
                        lessonCardView.getTxtViewTime().text = DataTypes().getTime()[i]

                        //println(timeslot)

                        for (lesson in timeslot) {
                            val lessonTxtView = LessonTextView(context!!)
                            lessonTxtView.setLesson(lesson)

                            // TODO why does this exist
                            if (lessonTxtView.text.length > 3)
                                lessonCardView.getLinLayoutLesson().addView(lessonTxtView)
                        }

                        // only add the lesson if it contains data
                        if (lessonCardView.getLinLayoutLesson().childCount > 1)
                            cardViewTimeTableDay.getLinLayoutMensaDay().addView(lessonCardView)
                    }

                    calendar.add(Calendar.DATE, 1)

                    // if the day contains no lessons add a text "No lesson today"
                    if (cardViewTimeTableDay.getLinLayoutMensaDay().childCount <= 1) {
                        val lessonTxtView = LessonTextView(context!!)
                        lessonTxtView.setText(resources.getString(R.string.no_lesson_today))

                        val lessonCardView = LessonCardView(context!!, null)
                        lessonCardView.getLinLayoutLesson().addView(lessonTxtView)

                        cardViewTimeTableDay.getLinLayoutMensaDay().addView(lessonCardView)
                    }

                    linLayoutTTFragment.addView(cardViewTimeTableDay)
                }

                // add next weeks days, max number  = dayIndex, if timetable was loaded
                if (timetables[1].days.isNotEmpty()) {
                    calendar.add(Calendar.DATE, 1) // before this we are at a sunday (no lecture on sundays!)

                    for (day in 0..(dayIndex - 1)) {

                        val cardViewTimeTableDay = MensaDayCardView(context!!, null)
                        cardViewTimeTableDay.setDayHeading(formatter.format(calendar.time))

                        // for each timeslot of the day
                        for ((i, timeslot) in timetables[1].days[day].timeslots.withIndex()) {
                            val lessonCardView = LessonCardView(context!!, null)
                            lessonCardView.getTxtViewTime().text = DataTypes().getTime()[i]


                            for (lesson in timeslot) {
                                val lessonTxtView = LessonTextView(context!!)
                                lessonTxtView.setLesson(lesson)

                                if (lessonTxtView.text.length > 3)
                                    lessonCardView.getLinLayoutLesson().addView(lessonTxtView)
                            }

                            // only add the lesson if it contains data
                            if (lessonCardView.getLinLayoutLesson().childCount > 1)
                                cardViewTimeTableDay.getLinLayoutMensaDay().addView(lessonCardView)
                        }

                        calendar.add(Calendar.DATE, 1)

                        // if the day contains no lessons add a text "No lesson today"
                        if (cardViewTimeTableDay.getLinLayoutMensaDay().childCount <= 1) {
                            val lessonTxtView = LessonTextView(context!!)
                            lessonTxtView.setText(resources.getString(R.string.no_lesson_today))

                            val lessonCardView = LessonCardView(context!!, null)
                            lessonCardView.getLinLayoutLesson().addView(lessonTxtView)

                            cardViewTimeTableDay.getLinLayoutMensaDay().addView(lessonCardView)
                        }

                        linLayoutTTFragment.addView(cardViewTimeTableDay)
                    }
                }

            }

        }
    }

}