riff_app/app/src/main/java/fr/riff_app/riff/planning/Programme.kt

package fr.riff_app.riff.planning

import android.util.Log
import fr.riff_app.riff.tag
import fr.riff_app.riff.weekdays
import java.util.*
import kotlin.collections.ArrayList

class Programme (val title: String, private val periodicity: Int, private val hourBegin: Int, private val hourEnd: Int) {

    fun isThisDay(day: Int): Boolean {

        // 0 (Monday) to 5 (Saturday) + 6 (Sunday)

        // this translates to "true" when:
        // - the currentDay is flagged in the "periodicity" bit array
        // OR
        // - Yesterday is flagged in the "periodicity" bit array AND the program does span over 2 days (night programs).
        // We'll check a after this whether the current hour is within the span.
        return (((0b1000000 shr day) and (periodicity)) != 0)
    }

    fun isCurrent(): Boolean {
        val now = Calendar.getInstance(Planning.instance.timeZone)
        val currentDay =
            if (now.get(Calendar.DAY_OF_WEEK) - 1 == 0) 6 else now.get(Calendar.DAY_OF_WEEK) - 2
        // 0 (Monday) to 5 (Saturday) + 6 (Sunday)

        // this translates to "true" when:
        // - the currentDay is flagged in the "periodicity" bit array
        // OR
        // - Yesterday is flagged in the "periodicity" bit array AND the program does span over 2 days (night programs).
        // We'll check a after this whether the current hour is within the span.
        val isToday: Boolean = (((0b1000000 shr currentDay) and (periodicity)) != 0)
        val isSpanningOverNight =
            (((0b1000000 shr ((currentDay - 1) % 7) and (periodicity)) != 0) && hourEnd < hourBegin)

        //[REMOVE LOG CALLS]Log.d(tag, "$title is today: $isToday or spanning $isSpanningOverNight")
        // shr = shift-right. It's a binary mask.

        // if the program started yesterday, and spanned over night, it means that there could be a chance that it's still active.
        // we only need to check if the end time has been reached.
        if (isSpanningOverNight) {
            return (now.get(Calendar.HOUR_OF_DAY) * 60 + now.get(Calendar.MINUTE) < hourEnd)
        }

        // if the program is today, we need to check if we're in the hour span.
        if (isToday) {
            val hasBegun =
                (now.get(Calendar.HOUR_OF_DAY) * 60 + now.get(Calendar.MINUTE) >= hourBegin)
            val hasNotEnded =
                (now.get(Calendar.HOUR_OF_DAY) * 60 + now.get(Calendar.MINUTE) < hourEnd) || hourEnd < hourBegin
            return (hasBegun && hasNotEnded)
        }
        return false
    }

    override fun toString(): String {
        return "Title: $title, time info (periodicity, begin, end): $periodicity, $hourBegin, $hourEnd"
    }

    private val offset1 = (Planning.instance.timeZone.getOffset(System.currentTimeMillis())) / (60*1000)
    private val offset2 = (Calendar.getInstance().timeZone.getOffset(System.currentTimeMillis())) / (60*1000)

    fun begin(): String {
        val hourBeginTZCorrect = hourBegin // + offset1 - offset2
        return "%02d:%02d".format(hourBeginTZCorrect/60, hourBeginTZCorrect%60)
    }

    fun end(): String {
        val hourEndTZCorrect = hourEnd // + offset1 - offset2
        return "%02d:%02d".format(hourEndTZCorrect/60, hourEndTZCorrect%60)
    }

    /*
    fun days(): String {
        val res = ArrayList<String>()
        for (i in 0 until weekdays.size) {
            if (((0b1000000 shr i) and (periodicity)) != 0)
            {
                res.add(weekdays[i])
            }
        }
        return res.toString().drop(1).dropLast(1) //  drop '[' and ']'
    }

     */

    init {
        //[REMOVE LOG CALLS]Log.d(tag, this.toString())
    }
}