package com.simplemobiletools.clock.helpers

import android.os.Handler
import android.os.Looper
import com.simplemobiletools.clock.models.MyTimeZone
import com.simplemobiletools.commons.helpers.isOnMainThread
import java.util.*
import java.util.concurrent.Callable
import java.util.concurrent.Executors
import kotlin.math.pow

// shared preferences
const val SELECTED_TIME_ZONES = "selected_time_zones"
const val EDITED_TIME_ZONE_TITLES = "edited_time_zone_titles"
const val TIMER_SECONDS = "timer_seconds"
const val TIMER_VIBRATE = "timer_vibrate"
const val TIMER_SOUND_URI = "timer_sound_uri"
const val TIMER_SOUND_TITLE = "timer_sound_title"
const val TIMER_CHANNEL_ID = "timer_channel_id"
const val TIMER_LABEL = "timer_label"
const val TOGGLE_STOPWATCH = "toggle_stopwatch"
const val TIMER_MAX_REMINDER_SECS = "timer_max_reminder_secs"
const val ALARM_MAX_REMINDER_SECS = "alarm_max_reminder_secs"
const val ALARM_LAST_CONFIG = "alarm_last_config"
const val TIMER_LAST_CONFIG = "timer_last_config"
const val INCREASE_VOLUME_GRADUALLY = "increase_volume_gradually"
const val ALARMS_SORT_BY = "alarms_sort_by"
const val STOPWATCH_LAPS_SORT_BY = "stopwatch_laps_sort_by"
const val WAS_INITIAL_WIDGET_SET_UP = "was_initial_widget_set_up"

const val TABS_COUNT = 4
const val EDITED_TIME_ZONE_SEPARATOR = ":"
const val ALARM_ID = "alarm_id"
const val NOTIFICATION_ID = "notification_id"
const val DEFAULT_ALARM_MINUTES = 480
const val DEFAULT_MAX_ALARM_REMINDER_SECS = 300
const val DEFAULT_MAX_TIMER_REMINDER_SECS = 60
const val SIMPLE_PHONE = "Simple_Phone"
const val ALARM_NOTIFICATION_CHANNEL_ID = "Alarm_Channel"
const val EARLY_ALARM_DISMISSAL_CHANNEL_ID = "Early Alarm Dismissal"

const val OPEN_STOPWATCH_TAB_INTENT_ID = 9993
const val PICK_AUDIO_FILE_INTENT_ID = 9994
const val REMINDER_ACTIVITY_INTENT_ID = 9995
const val OPEN_ALARMS_TAB_INTENT_ID = 9996
const val OPEN_APP_INTENT_ID = 9997
const val ALARM_NOTIF_ID = 9998
const val TIMER_RUNNING_NOTIF_ID = 10000
const val STOPWATCH_RUNNING_NOTIF_ID = 10001
const val EARLY_ALARM_DISMISSAL_INTENT_ID = 10002
const val EARLY_ALARM_NOTIF_ID = 10003

const val OPEN_TAB = "open_tab"
const val TAB_CLOCK = 0
const val TAB_ALARM = 1
const val TAB_STOPWATCH = 2
const val TAB_TIMER = 3
const val TIMER_ID = "timer_id"
const val INVALID_TIMER_ID = -1

// stopwatch sorting
const val SORT_BY_LAP = 1
const val SORT_BY_LAP_TIME = 2
const val SORT_BY_TOTAL_TIME = 4

// alarm sorting
const val SORT_BY_CREATION_ORDER = 0
const val SORT_BY_ALARM_TIME = 1
const val SORT_BY_DATE_AND_TIME = 2

const val TODAY_BIT = -1
const val TOMORROW_BIT = -2

// stopwatch shortcut
const val STOPWATCH_SHORTCUT_ID = "stopwatch_shortcut_id"
const val STOPWATCH_TOGGLE_ACTION = "com.simplemobiletools.clock.TOGGLE_STOPWATCH"

fun getDefaultTimeZoneTitle(id: Int) = getAllTimeZones().firstOrNull { it.id == id }?.title ?: ""

fun getPassedSeconds(): Int {
    val calendar = Calendar.getInstance()
    val isDaylightSavingActive = TimeZone.getDefault().inDaylightTime(Date())
    var offset = calendar.timeZone.rawOffset
    if (isDaylightSavingActive) {
        offset += TimeZone.getDefault().dstSavings
    }
    return ((calendar.timeInMillis + offset) / 1000).toInt()
}

fun formatTime(showSeconds: Boolean, use24HourFormat: Boolean, hours: Int, minutes: Int, seconds: Int): String {
    val hoursFormat = if (use24HourFormat) "%02d" else "%01d"
    var format = "$hoursFormat:%02d"

    return if (showSeconds) {
        format += ":%02d"
        String.format(format, hours, minutes, seconds)
    } else {
        String.format(format, hours, minutes)
    }
}

fun getTomorrowBit(): Int {
    val calendar = Calendar.getInstance()
    calendar.add(Calendar.DAY_OF_WEEK, 1)
    val dayOfWeek = (calendar.get(Calendar.DAY_OF_WEEK) + 5) % 7
    return 2.0.pow(dayOfWeek).toInt()
}

fun getCurrentDayMinutes(): Int {
    val calendar = Calendar.getInstance()
    return calendar.get(Calendar.HOUR_OF_DAY) * 60 + calendar.get(Calendar.MINUTE)
}

fun getAllTimeZones() = arrayListOf(
    MyTimeZone(1, "GMT-11:00 Midway", "Pacific/Midway"),
    MyTimeZone(2, "GMT-10:00 Honolulu", "Pacific/Honolulu"),
    MyTimeZone(3, "GMT-09:00 Anchorage", "America/Anchorage"),
    MyTimeZone(4, "GMT-08:00 Los Angeles", "America/Los_Angeles"),
    MyTimeZone(5, "GMT-08:00 Tijuana", "America/Tijuana"),
    MyTimeZone(6, "GMT-07:00 Phoenix", "America/Phoenix"),
    MyTimeZone(7, "GMT-07:00 Chihuahua", "America/Chihuahua"),
    MyTimeZone(8, "GMT-07:00 Denver", "America/Denver"),
    MyTimeZone(9, "GMT-06:00 Costa Rica", "America/Costa_Rica"),
    MyTimeZone(10, "GMT-06:00 Chicago", "America/Chicago"),
    MyTimeZone(11, "GMT-06:00 Mexico City", "America/Mexico_City"),
    MyTimeZone(12, "GMT-06:00 Regina", "America/Regina"),
    MyTimeZone(13, "GMT-05:00 Bogota", "America/Bogota"),
    MyTimeZone(14, "GMT-05:00 New York", "America/New_York"),
    MyTimeZone(15, "GMT-04:00 Caracas", "America/Caracas"),
    MyTimeZone(16, "GMT-04:00 Barbados", "America/Barbados"),
    MyTimeZone(17, "GMT-04:00 Halifax", "America/Halifax"),
    MyTimeZone(18, "GMT-04:00 Manaus", "America/Manaus"),
    MyTimeZone(19, "GMT-03:30 St. John's", "America/St_Johns"),
    MyTimeZone(20, "GMT-03:00 Santiago", "America/Santiago"),
    MyTimeZone(21, "GMT-03:00 Recife", "America/Recife"),
    MyTimeZone(22, "GMT-03:00 Sao Paulo", "America/Sao_Paulo"),
    MyTimeZone(23, "GMT-03:00 Buenos Aires", "America/Buenos_Aires"),
    MyTimeZone(24, "GMT-03:00 Nuuk", "America/Godthab"),
    MyTimeZone(25, "GMT-03:00 Montevideo", "America/Montevideo"),
    MyTimeZone(26, "GMT-02:00 South Georgia", "Atlantic/South_Georgia"),
    MyTimeZone(27, "GMT-01:00 Azores", "Atlantic/Azores"),
    MyTimeZone(28, "GMT-01:00 Cape Verde", "Atlantic/Cape_Verde"),
    MyTimeZone(29, "GMT+00:00 Casablanca", "Africa/Casablanca"),
    MyTimeZone(30, "GMT+00:00 Greenwich Mean Time", "Etc/Greenwich"),
    MyTimeZone(31, "GMT+01:00 Amsterdam", "Europe/Amsterdam"),
    MyTimeZone(32, "GMT+01:00 Belgrade", "Europe/Belgrade"),
    MyTimeZone(33, "GMT+01:00 Brussels", "Europe/Brussels"),
    MyTimeZone(34, "GMT+01:00 Madrid", "Europe/Madrid"),
    MyTimeZone(35, "GMT+01:00 Sarajevo", "Europe/Sarajevo"),
    MyTimeZone(36, "GMT+01:00 Brazzaville", "Africa/Brazzaville"),
    MyTimeZone(37, "GMT+02:00 Windhoek", "Africa/Windhoek"),
    MyTimeZone(38, "GMT+02:00 Amman", "Asia/Amman"),
    MyTimeZone(39, "GMT+02:00 Athens", "Europe/Athens"),
    MyTimeZone(40, "GMT+02:00 Istanbul", "Europe/Istanbul"),
    MyTimeZone(41, "GMT+02:00 Beirut", "Asia/Beirut"),
    MyTimeZone(42, "GMT+02:00 Cairo", "Africa/Cairo"),
    MyTimeZone(43, "GMT+02:00 Helsinki", "Europe/Helsinki"),
    MyTimeZone(44, "GMT+02:00 Jerusalem", "Asia/Jerusalem"),
    MyTimeZone(45, "GMT+02:00 Harare", "Africa/Harare"),
    MyTimeZone(46, "GMT+03:00 Minsk", "Europe/Minsk"),
    MyTimeZone(47, "GMT+03:00 Baghdad", "Asia/Baghdad"),
    MyTimeZone(48, "GMT+03:00 Moscow", "Europe/Moscow"),
    MyTimeZone(49, "GMT+03:00 Kuwait", "Asia/Kuwait"),
    MyTimeZone(50, "GMT+03:00 Nairobi", "Africa/Nairobi"),
    MyTimeZone(51, "GMT+03:30 Tehran", "Asia/Tehran"),
    MyTimeZone(52, "GMT+04:00 Baku", "Asia/Baku"),
    MyTimeZone(53, "GMT+04:00 Tbilisi", "Asia/Tbilisi"),
    MyTimeZone(54, "GMT+04:00 Yerevan", "Asia/Yerevan"),
    MyTimeZone(55, "GMT+04:00 Dubai", "Asia/Dubai"),
    MyTimeZone(56, "GMT+04:30 Kabul", "Asia/Kabul"),
    MyTimeZone(57, "GMT+05:00 Karachi", "Asia/Karachi"),
    MyTimeZone(58, "GMT+05:00 Oral", "Asia/Oral"),
    MyTimeZone(59, "GMT+05:00 Yekaterinburg", "Asia/Yekaterinburg"),
    MyTimeZone(60, "GMT+05:30 Kolkata", "Asia/Kolkata"),
    MyTimeZone(61, "GMT+05:30 Colombo", "Asia/Colombo"),
    MyTimeZone(62, "GMT+05:45 Kathmandu", "Asia/Kathmandu"),
    MyTimeZone(63, "GMT+06:00 Almaty", "Asia/Almaty"),
    MyTimeZone(64, "GMT+06:30 Rangoon", "Asia/Rangoon"),
    MyTimeZone(65, "GMT+07:00 Krasnoyarsk", "Asia/Krasnoyarsk"),
    MyTimeZone(66, "GMT+07:00 Bangkok", "Asia/Bangkok"),
    MyTimeZone(67, "GMT+07:00 Jakarta", "Asia/Jakarta"),
    MyTimeZone(68, "GMT+08:00 Shanghai", "Asia/Shanghai"),
    MyTimeZone(69, "GMT+08:00 Hong Kong", "Asia/Hong_Kong"),
    MyTimeZone(70, "GMT+08:00 Irkutsk", "Asia/Irkutsk"),
    MyTimeZone(71, "GMT+08:00 Kuala Lumpur", "Asia/Kuala_Lumpur"),
    MyTimeZone(72, "GMT+08:00 Perth", "Australia/Perth"),
    MyTimeZone(73, "GMT+08:00 Taipei", "Asia/Taipei"),
    MyTimeZone(74, "GMT+09:00 Seoul", "Asia/Seoul"),
    MyTimeZone(75, "GMT+09:00 Tokyo", "Asia/Tokyo"),
    MyTimeZone(76, "GMT+09:00 Yakutsk", "Asia/Yakutsk"),
    MyTimeZone(77, "GMT+09:30 Darwin", "Australia/Darwin"),
    MyTimeZone(78, "GMT+10:00 Brisbane", "Australia/Brisbane"),
    MyTimeZone(79, "GMT+10:00 Vladivostok", "Asia/Vladivostok"),
    MyTimeZone(80, "GMT+10:00 Guam", "Pacific/Guam"),
    MyTimeZone(81, "GMT+10:00 Magadan", "Asia/Magadan"),
    MyTimeZone(82, "GMT+10:30 Adelaide", "Australia/Adelaide"),
    MyTimeZone(83, "GMT+11:00 Hobart", "Australia/Hobart"),
    MyTimeZone(84, "GMT+11:00 Sydney", "Australia/Sydney"),
    MyTimeZone(85, "GMT+11:00 Noumea", "Pacific/Noumea"),
    MyTimeZone(86, "GMT+12:00 Majuro", "Pacific/Majuro"),
    MyTimeZone(87, "GMT+12:00 Fiji", "Pacific/Fiji"),
    MyTimeZone(88, "GMT+13:00 Auckland", "Pacific/Auckland"),
    MyTimeZone(89, "GMT+13:00 Tongatapu", "Pacific/Tongatapu")
)

fun getTimeUntilNextAlarm(alarmTimeInMinutes: Int, days: Int): Int? {
    val calendar = Calendar.getInstance()
    calendar.firstDayOfWeek = Calendar.MONDAY
    val currentTimeInMinutes = calendar.get(Calendar.HOUR_OF_DAY) * 60 + calendar.get(Calendar.MINUTE)
    val currentDayOfWeek = calendar.get(Calendar.DAY_OF_WEEK) - Calendar.MONDAY

    var minTimeDifferenceInMinutes = Int.MAX_VALUE

    for (i in 0..6) {
        val alarmDayOfWeek = (currentDayOfWeek + i) % 7
        if (isAlarmEnabledForDay(alarmDayOfWeek, days)) {
            val timeDifferenceInMinutes = getTimeDifferenceInMinutes(currentTimeInMinutes, alarmTimeInMinutes, i)
            if (timeDifferenceInMinutes < minTimeDifferenceInMinutes) {
                minTimeDifferenceInMinutes = timeDifferenceInMinutes
            }
        }
    }

    return if (minTimeDifferenceInMinutes != Int.MAX_VALUE) {
        minTimeDifferenceInMinutes
    } else {
        null
    }
}

fun isAlarmEnabledForDay(day: Int, alarmDays: Int): Boolean {
    return ((alarmDays shr day) and 1) == 1
}

fun getTimeDifferenceInMinutes(currentTimeInMinutes: Int, alarmTimeInMinutes: Int, daysUntilAlarm: Int): Int {
    val minutesInADay = 24 * 60
    val minutesUntilAlarm = daysUntilAlarm * minutesInADay + alarmTimeInMinutes
    return if (minutesUntilAlarm > currentTimeInMinutes) {
        minutesUntilAlarm - currentTimeInMinutes
    } else {
        minutesInADay - (currentTimeInMinutes - minutesUntilAlarm)
    }
}

/**
 * Runs tasks that you want on a background thread and returns the result or error
 * @param task: Callable to add code that should execute on a background thread
 * @param callback: Gives back the result from the task after it has completed executing on the Main thread
 * @param onError: Gives the error thrown if any by the Callable on the Main thread
 */
fun <T> ensureBackgroundThreadWithResult(
    task: Callable<T>,
    callback: (T) -> Unit,
    onError: ((Throwable) -> Unit)? = null
) {
    val executor = if (isOnMainThread()) {
        Executors.newSingleThreadExecutor()
    } else {
        Executors.newFixedThreadPool(1)
    }

    val handler = Handler(Looper.getMainLooper())

    val future = executor.submit(task)

    executor.submit {
        try {
            val result = future.get()
            handler.post {
                callback(result)
            }
        } catch (t: Throwable) {
            handler.post {
                onError?.invoke(t)
            }
        } finally {
            executor.shutdown()
        }
    }
}