import org.jsoup.Jsoup

class TimeTableParser {

    val days = arrayOf("Monday", "Tuesday" ,"Wednesday", "Thursday", "Friday", "Saturday")
    var timeTableWeek = arrayOf<Array<Lesson>>()
    var courseTTLinkList = ArrayList<CourseTTLink>()

    /**
     * get the timetable from the given url
     * the timetable is organised per row not per column;
     * Mon 1, Tue 1, Wed 1, Thur 1, Fri 1, Sat 1, Mon 2 and so on
     */
    fun getTimeTable(courseTTURL: String) {

        // TODO do we even need this?
        // create the timetable array
//        for (i in 0..5) {
//            var timeTableDay = arrayOf<Lesson>()
//            for (j in 0..6) {
//                timeTableDay += Lesson("", "","","")
//            }
//            timeTableWeek += timeTableDay
//        }


        val scheduleHTML = Jsoup.connect(courseTTURL).get()

        val week = scheduleHTML.select("h1.timetable-caption").text()
        println("$week successful!\n")

        scheduleHTML.select("table.timetable").select("td.lastcol").forEachIndexed { index, element ->
            timeTableWeek[index % 6][index / 6] = Lesson(element.select("div.lesson-subject").text(), element.select("div.lesson-teacher").text(), element.select("div.lesson-room").text(), element.select("div.lesson-remark").text())
        }
    }

    /**
     * parse all courses from the courses site at https://www.hs-offenburg.de/studium/vorlesungsplaene/
     */
    fun getCourseTTLinks() {
        val courseHTML = Jsoup.connect("https://www.hs-offenburg.de/studium/vorlesungsplaene/").get()

        courseHTML.select("ul.index-group").select("li.Class").select("a[href]").forEachIndexed { _, element ->
            courseTTLinkList.add(CourseTTLink(element.attr("href"),element.text()))
        }
    }

    fun printTimeTableWeek (timeTableWeek: Array<Array<Lesson>>) {

        for (j in 0..5) print(days[j].padEnd(25 ,' ') + " | ")
        println()
        for (j in 0..5) print("-".padEnd(26 + (j.toFloat().div(j).toInt()), '-') + "+")
        println()

        for (i in 0..6) {
            for (j in 0..5) print(timeTableWeek[j][i].lessonSubject.padEnd(25 ,' ').substring(0,25) + " | ")
            println()
            for (j in 0..5) print(timeTableWeek[j][i].lessonTeacher.padEnd(25 ,' ').substring(0,25) + " | ")
            println()
            for (j in 0..5) print(timeTableWeek[j][i].lessonRoom.padEnd(25 ,' ').substring(0,25) + " | ")
            println()
            for (j in 0..5) print("-".padEnd(26 + (j.toFloat().div(j).toInt()), '-') + "+")
            println()
        }
        println()
    }

    fun printTimeTableDay(timeTableDay: Array<Lesson>, day: Int) {
        println(days[day])
        for (i in 0..6) {
            println("-".padEnd(22, '-'))
            println(timeTableDay[i].lessonSubject)
            println(timeTableDay[i].lessonTeacher)
            println(timeTableDay[i].lessonRoom)
        }
        println("-".padEnd(22, '-'))
        println()
    }
}