package pl.szczodrzynski.edziennik

import android.Manifest
import android.app.Activity
import android.content.Context
import android.content.pm.PackageManager
import android.content.res.ColorStateList
import android.content.res.Resources
import android.graphics.PorterDuff
import android.graphics.PorterDuffColorFilter
import android.graphics.Typeface
import android.graphics.drawable.Drawable
import android.os.Build
import android.os.Bundle
import android.text.*
import android.text.style.ForegroundColorSpan
import android.text.style.StrikethroughSpan
import android.text.style.StyleSpan
import android.util.Base64
import android.util.Base64.NO_WRAP
import android.util.Base64.encodeToString
import android.util.LongSparseArray
import android.util.SparseArray
import android.util.TypedValue
import android.view.View
import android.widget.CompoundButton
import android.widget.TextView
import androidx.annotation.*
import androidx.core.app.ActivityCompat
import androidx.core.util.forEach
import androidx.lifecycle.LifecycleOwner
import androidx.lifecycle.LiveData
import androidx.lifecycle.Observer
import com.google.gson.JsonArray
import com.google.gson.JsonElement
import com.google.gson.JsonObject
import im.wangchao.mhttp.Response
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.delay
import kotlinx.coroutines.launch
import okhttp3.RequestBody
import okio.Buffer
import pl.szczodrzynski.edziennik.data.db.modules.profiles.Profile
import pl.szczodrzynski.edziennik.data.db.modules.teachers.Teacher
import pl.szczodrzynski.edziennik.data.db.modules.teams.Team
import pl.szczodrzynski.edziennik.utils.models.Time
import java.io.PrintWriter
import java.io.StringWriter
import java.math.BigInteger
import java.nio.charset.Charset
import java.security.MessageDigest
import java.text.SimpleDateFormat
import java.util.*
import java.util.zip.CRC32
import javax.crypto.Mac
import javax.crypto.spec.SecretKeySpec


fun List<Teacher>.byId(id: Long) = firstOrNull { it.id == id }
fun List<Teacher>.byNameFirstLast(nameFirstLast: String) = firstOrNull { it.name + " " + it.surname == nameFirstLast }
fun List<Teacher>.byNameLastFirst(nameLastFirst: String) = firstOrNull { it.surname + " " + it.name == nameLastFirst }
fun List<Teacher>.byNameFDotLast(nameFDotLast: String) = firstOrNull { it.name + "." + it.surname == nameFDotLast }
fun List<Teacher>.byNameFDotSpaceLast(nameFDotSpaceLast: String) = firstOrNull { it.name + ". " + it.surname == nameFDotSpaceLast }

fun JsonObject?.get(key: String): JsonElement? = this?.get(key)

fun JsonObject?.getBoolean(key: String): Boolean? = get(key)?.let { if (it.isJsonNull) null else it.asBoolean }
fun JsonObject?.getString(key: String): String? = get(key)?.let { if (it.isJsonNull) null else it.asString }
fun JsonObject?.getInt(key: String): Int? = get(key)?.let { if (it.isJsonNull) null else it.asInt }
fun JsonObject?.getLong(key: String): Long? = get(key)?.let { if (it.isJsonNull) null else it.asLong }
fun JsonObject?.getFloat(key: String): Float? = get(key)?.let { if(it.isJsonNull) null else it.asFloat }
fun JsonObject?.getChar(key: String): Char? = get(key)?.let { if(it.isJsonNull) null else it.asCharacter }
fun JsonObject?.getJsonObject(key: String): JsonObject? = get(key)?.let { if (it.isJsonNull) null else it.asJsonObject }
fun JsonObject?.getJsonArray(key: String): JsonArray? = get(key)?.let { if (it.isJsonNull) null else it.asJsonArray }

fun JsonObject?.getBoolean(key: String, defaultValue: Boolean): Boolean = get(key)?.let { if (it.isJsonNull) defaultValue else it.asBoolean } ?: defaultValue
fun JsonObject?.getString(key: String, defaultValue: String): String = get(key)?.let { if (it.isJsonNull) defaultValue else it.asString } ?: defaultValue
fun JsonObject?.getInt(key: String, defaultValue: Int): Int = get(key)?.let { if (it.isJsonNull) defaultValue else it.asInt } ?: defaultValue
fun JsonObject?.getLong(key: String, defaultValue: Long): Long = get(key)?.let { if (it.isJsonNull) defaultValue else it.asLong } ?: defaultValue
fun JsonObject?.getFloat(key: String, defaultValue: Float): Float = get(key)?.let { if(it.isJsonNull) defaultValue else it.asFloat } ?: defaultValue
fun JsonObject?.getChar(key: String, defaultValue: Char): Char = get(key)?.let { if(it.isJsonNull) defaultValue else it.asCharacter } ?: defaultValue
fun JsonObject?.getJsonObject(key: String, defaultValue: JsonObject): JsonObject = get(key)?.let { if (it.isJsonNull) defaultValue else it.asJsonObject } ?: defaultValue
fun JsonObject?.getJsonArray(key: String, defaultValue: JsonArray): JsonArray = get(key)?.let { if (it.isJsonNull) defaultValue else it.asJsonArray } ?: defaultValue

operator fun JsonObject.set(key: String, value: JsonElement) = this.add(key, value)
operator fun JsonObject.set(key: String, value: Boolean) = this.addProperty(key, value)
operator fun JsonObject.set(key: String, value: String?) = this.addProperty(key, value)
operator fun JsonObject.set(key: String, value: Number) = this.addProperty(key, value)
operator fun JsonObject.set(key: String, value: Char) = this.addProperty(key, value)

operator fun Profile.set(key: String, value: JsonElement) = this.studentData.add(key, value)
operator fun Profile.set(key: String, value: Boolean) = this.studentData.addProperty(key, value)
operator fun Profile.set(key: String, value: String?) = this.studentData.addProperty(key, value)
operator fun Profile.set(key: String, value: Number) = this.studentData.addProperty(key, value)
operator fun Profile.set(key: String, value: Char) = this.studentData.addProperty(key, value)

fun JsonArray.asJsonObjectList() = this.map { it.asJsonObject }

fun CharSequence?.isNotNullNorEmpty(): Boolean {
    return this != null && this.isNotEmpty()
}

fun currentTimeUnix() = System.currentTimeMillis() / 1000

fun Bundle?.getInt(key: String, defaultValue: Int): Int {
    return this?.getInt(key, defaultValue) ?: defaultValue
}
fun Bundle?.getLong(key: String, defaultValue: Long): Long {
    return this?.getLong(key, defaultValue) ?: defaultValue
}
fun Bundle?.getFloat(key: String, defaultValue: Float): Float {
    return this?.getFloat(key, defaultValue) ?: defaultValue
}
fun Bundle?.getString(key: String, defaultValue: String): String {
    return this?.getString(key, defaultValue) ?: defaultValue
}

/**
 * `   The quick BROWN_fox Jumps OveR THE       LAZy-DOG.   `
 *
 * converts to
 *
 * `The Quick Brown_fox Jumps Over The Lazy-Dog.`
 */
fun String?.fixName(): String {
    return this?.fixWhiteSpaces()?.toProperCase() ?: ""
}

/**
 * `The quick BROWN_fox Jumps OveR THE       LAZy-DOG.`
 *
 * converts to
 *
 * `The Quick Brown_fox Jumps Over The       Lazy-Dog.`
 */
fun String.toProperCase(): String = changeStringCase(this)

/**
 * `John Smith` -> `Smith John`
 *
 * `JOHN SMith` -> `SMith JOHN`
 */
fun String.swapFirstLastName(): String {
    return this.split(" ").let {
        if (it.size > 1)
            it[1]+" "+it[0]
        else
            it[0]
    }
}

fun String.splitName(): Pair<String, String>? {
    return this.split(" ").let {
        if (it.size >= 2) Pair(it[0], it[1])
        else null
    }
}

fun changeStringCase(s: String): String {
    val delimiters = " '-/"
    val sb = StringBuilder()
    var capNext = true
    for (ch in s.toCharArray()) {
        var c = ch
        c = if (capNext)
            Character.toUpperCase(c)
        else
            Character.toLowerCase(c)
        sb.append(c)
        capNext = delimiters.indexOf(c) >= 0
    }
    return sb.toString()
}

fun buildFullName(firstName: String?, lastName: String?): String {
    return "$firstName $lastName".fixName()
}

fun String.getShortName(): String {
    return split(" ").let {
        if (it.size > 1)
            "${it[0]} ${it[1][0]}."
        else
            it[0]
    }
}

/**
 * "John Smith"             -> "JS"
 *
 * "JOHN SMith"             -> "JS"
 *
 * "John"                   -> "J"
 *
 * "John "                  -> "J"
 *
 * "John     Smith      "   -> "JS"
 *
 * " "                      -> ""
 *
 * "  "                     -> ""
 */
fun String?.getNameInitials(): String {
    if (this.isNullOrBlank()) return ""
    return this.toUpperCase().fixWhiteSpaces().split(" ").take(2).map { it[0] }.joinToString("")
}

fun List<String>.join(delimiter: String): String {
    return concat(delimiter).toString()
}

fun colorFromName(name: String?): Int {
    val i = (name ?: "").crc32()
    return when ((i / 10 % 16 + 1).toInt()) {
        13 -> 0xffF44336
        4  -> 0xffF50057
        2  -> 0xffD500F9
        9  -> 0xff6200EA
        5  -> 0xffFFAB00
        1  -> 0xff304FFE
        6  -> 0xff40C4FF
        14 -> 0xff26A69A
        15 -> 0xff00C853
        7  -> 0xffFFD600
        3  -> 0xffFF3D00
        8  -> 0xffDD2C00
        10 -> 0xff795548
        12 -> 0xff2979FF
        11 -> 0xffFF6D00
        else -> 0xff64DD17
    }.toInt()
}

fun colorFromCssName(name: String): Int {
    return when (name) {
        "red" -> 0xffff0000
        "green" -> 0xff008000
        "blue" -> 0xff0000ff
        "violet" -> 0xffee82ee
        "brown" -> 0xffa52a2a
        "orange" -> 0xffffa500
        "black" -> 0xff000000
        "white" -> 0xffffffff
        else -> -1
    }.toInt()
}

fun List<Profile>.filterOutArchived() = this.filter { !it.archived }

fun Activity.isStoragePermissionGranted(): Boolean {
    return if (Build.VERSION.SDK_INT >= 23) {
        if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
            true
        } else {
            ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE), 1)
            false
        }
    } else {
        true
    }
}

fun Response?.getUnixDate(): Long {
    val rfcDate = this?.headers()?.get("date") ?: return currentTimeUnix()
    val pattern = "EEE, dd MMM yyyy HH:mm:ss Z"
    val format = SimpleDateFormat(pattern, Locale.ENGLISH)
    return format.parse(rfcDate).time / 1000
}

const val MINUTE = 60L
const val HOUR = 60L*MINUTE
const val DAY = 24L*HOUR
const val WEEK = 7L*DAY
const val MONTH = 30L*DAY
const val YEAR = 365L*DAY
const val MS = 1000L

fun <T> LongSparseArray<T>.values(): List<T> {
    val result = mutableListOf<T>()
    forEach { _, value ->
        result += value
    }
    return result
}

fun <T> SparseArray<T>.values(): List<T> {
    val result = mutableListOf<T>()
    forEach { _, value ->
        result += value
    }
    return result
}

fun <K, V> List<Pair<K, V>>.keys(): List<K> {
    val result = mutableListOf<K>()
    forEach { pair ->
        result += pair.first
    }
    return result
}
fun <K, V> List<Pair<K, V>>.values(): List<V> {
    val result = mutableListOf<V>()
    forEach { pair ->
        result += pair.second
    }
    return result
}

fun <T> List<T>.toSparseArray(destination: SparseArray<T>, key: (T) -> Int) {
    forEach {
        destination.put(key(it), it)
    }
}
fun <T> List<T>.toSparseArray(destination: LongSparseArray<T>, key: (T) -> Long) {
    forEach {
        destination.put(key(it), it)
    }
}

fun <T> List<T>.toSparseArray(key: (T) -> Int): SparseArray<T> {
    val result = SparseArray<T>()
    toSparseArray(result, key)
    return result
}
fun <T> List<T>.toSparseArray(key: (T) -> Long): LongSparseArray<T> {
    val result = LongSparseArray<T>()
    toSparseArray(result, key)
    return result
}

fun <T> SparseArray<T>.singleOrNull(predicate: (T) -> Boolean): T? {
    forEach { _, value ->
        if (predicate(value))
            return value
    }
    return null
}
fun <T> LongSparseArray<T>.singleOrNull(predicate: (T) -> Boolean): T? {
    forEach { _, value ->
        if (predicate(value))
            return value
    }
    return null
}

fun String.fixWhiteSpaces() = buildString(length) {
    var wasWhiteSpace = true
    for (c in this@fixWhiteSpaces) {
        if (c.isWhitespace()) {
            if (!wasWhiteSpace) {
                append(c)
                wasWhiteSpace = true
            }
        } else {
            append(c)
            wasWhiteSpace = false
        }
    }
}.trimEnd()

fun List<Team>.getById(id: Long): Team? {
    return singleOrNull { it.id == id }
}
fun LongSparseArray<Team>.getById(id: Long): Team? {
    forEach { _, value ->
        if (value.id == id)
            return value
    }
    return null
}

operator fun MatchResult.get(group: Int): String {
    if (group >= groupValues.size)
        return ""
    return groupValues[group]
}

fun Activity.setLanguage(language: String) {
    val locale = Locale(language.toLowerCase(Locale.ROOT))
    val configuration = resources.configuration
    Locale.setDefault(locale)
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
        configuration.setLocale(locale)
    }
    configuration.locale = locale
    resources.updateConfiguration(configuration, resources.displayMetrics)
    baseContext.resources.updateConfiguration(configuration, baseContext.resources.displayMetrics)
}

/*
  Code copied from android-28/java.util.Locale.initDefault()
 */
fun initDefaultLocale() {
    run {
        // user.locale gets priority
        /*val languageTag: String? = System.getProperty("user.locale", "")
        if (languageTag.isNotNullNorEmpty()) {
            return@run Locale(languageTag)
        }*/

        // user.locale is empty
        val language: String? = System.getProperty("user.language", "pl")
        val region: String? = System.getProperty("user.region")
        val country: String?
        val variant: String?
        // for compatibility, check for old user.region property
        if (region != null) {
            // region can be of form country, country_variant, or _variant
            val i = region.indexOf('_')
            if (i >= 0) {
                country = region.substring(0, i)
                variant = region.substring(i + 1)
            } else {
                country = region
                variant = ""
            }
        } else {
            country = System.getProperty("user.country", "")
            variant = System.getProperty("user.variant", "")
        }
        return@run Locale(language)
    }.let {
        Locale.setDefault(it)
    }
}

fun String.crc16(): Int {
    var crc = 0xFFFF
    for (aBuffer in this) {
        crc = crc.ushr(8) or (crc shl 8) and 0xffff
        crc = crc xor (aBuffer.toInt() and 0xff) // byte to int, trunc sign
        crc = crc xor (crc and 0xff shr 4)
        crc = crc xor (crc shl 12 and 0xffff)
        crc = crc xor (crc and 0xFF shl 5 and 0xffff)
    }
    crc = crc and 0xffff
    return crc + 32768
}

fun String.crc32(): Long {
    val crc = CRC32()
    crc.update(toByteArray())
    return crc.value
}

fun String.hmacSHA1(password: String): String {
    val key = SecretKeySpec(password.toByteArray(), "HmacSHA1")

    val mac = Mac.getInstance("HmacSHA1").apply {
        init(key)
        update(this@hmacSHA1.toByteArray())
    }

    return encodeToString(mac.doFinal(), NO_WRAP)
}

fun String.md5(): String {
    val md = MessageDigest.getInstance("MD5")
    return BigInteger(1, md.digest(toByteArray())).toString(16).padStart(32, '0')
}

fun String.sha256(): ByteArray {
    val md = MessageDigest.getInstance("SHA-256")
    md.update(toByteArray())
    return md.digest()
}

fun RequestBody.bodyToString(): String {
    val buffer = Buffer()
    writeTo(buffer)
    return buffer.readUtf8()
}

fun Long.formatDate(format: String = "yyyy-MM-dd HH:mm:ss"): String = SimpleDateFormat(format).format(this)

fun CharSequence?.asColoredSpannable(colorInt: Int): Spannable {
    val spannable = SpannableString(this)
    spannable.setSpan(ForegroundColorSpan(colorInt), 0, spannable.length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
    return spannable
}
fun CharSequence?.asStrikethroughSpannable(): Spannable {
    val spannable = SpannableString(this)
    spannable.setSpan(StrikethroughSpan(), 0, spannable.length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
    return spannable
}
fun CharSequence?.asItalicSpannable(): Spannable {
    val spannable = SpannableString(this)
    spannable.setSpan(StyleSpan(Typeface.ITALIC), 0, spannable.length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
    return spannable
}
fun CharSequence?.asBoldSpannable(): Spannable {
    val spannable = SpannableString(this)
    spannable.setSpan(StyleSpan(Typeface.BOLD), 0, spannable.length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
    return spannable
}
fun CharSequence.asSpannable(vararg spans: Any, substring: String? = null, ignoreCase: Boolean = false): Spannable {
    val spannable = SpannableString(this)
    if (substring == null) {
        spans.forEach {
            spannable.setSpan(it, 0, spannable.length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
        }
    }
    else if (substring.isNotEmpty()) {
        var index = indexOf(substring, ignoreCase = ignoreCase)
        while (index >= 0) {
            spans.forEach {
                spannable.setSpan(it, index, index + substring.length, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
            }
            index = indexOf(substring, startIndex = index + 1, ignoreCase = ignoreCase);
        }
    }
    return spannable
}

/**
 * Returns a new read-only list only of those given elements, that are not empty.
 * Applies for CharSequence and descendants.
 */
fun <T : CharSequence> listOfNotEmpty(vararg elements: T): List<T> = elements.filterNot { it.isEmpty() }

fun List<CharSequence?>.concat(delimiter: CharSequence? = null): CharSequence {
    if (this.isEmpty()) {
        return ""
    }

    if (this.size == 1) {
        return this[0] ?: ""
    }

    var spanned = delimiter is Spanned
    if (!spanned) {
        for (piece in this) {
            if (piece is Spanned) {
                spanned = true
                break
            }
        }
    }

    var first = true
    if (spanned) {
        val ssb = SpannableStringBuilder()
        for (piece in this) {
            if (piece == null)
                continue
            if (!first && delimiter != null)
                ssb.append(delimiter)
            first = false
            ssb.append(piece)
        }
        return SpannedString(ssb)
    } else {
        val sb = StringBuilder()
        for (piece in this) {
            if (piece == null)
                continue
            if (!first && delimiter != null)
                sb.append(delimiter)
            first = false
            sb.append(piece)
        }
        return sb.toString()
    }
}

fun TextView.setText(@StringRes resid: Int, vararg formatArgs: Any) {
    text = context.getString(resid, *formatArgs)
}

fun JsonObject(vararg properties: Pair<String, Any?>): JsonObject {
    return JsonObject().apply {
        for (property in properties) {
            when (property.second) {
                is JsonElement -> add(property.first, property.second as JsonElement?)
                is String -> addProperty(property.first, property.second as String?)
                is Char -> addProperty(property.first, property.second as Char?)
                is Number -> addProperty(property.first, property.second as Number?)
                is Boolean -> addProperty(property.first, property.second as Boolean?)
            }
        }
    }
}

fun JsonArray(vararg properties: Any?): JsonArray {
    return JsonArray().apply {
        for (property in properties) {
            when (property) {
                is JsonElement -> add(property as JsonElement?)
                is String -> add(property as String?)
                is Char -> add(property as Char?)
                is Number -> add(property as Number?)
                is Boolean -> add(property as Boolean?)
            }
        }
    }
}

fun Bundle(vararg properties: Pair<String, Any?>): Bundle {
    return Bundle().apply {
        for (property in properties) {
            when (property.second) {
                is String -> putString(property.first, property.second as String?)
                is Char -> putChar(property.first, property.second as Char)
                is Int -> putInt(property.first, property.second as Int)
                is Long -> putLong(property.first, property.second as Long)
                is Float -> putFloat(property.first, property.second as Float)
                is Short -> putShort(property.first, property.second as Short)
                is Double -> putDouble(property.first, property.second as Double)
                is Boolean -> putBoolean(property.first, property.second as Boolean)
            }
        }
    }
}

fun JsonArray?.isNullOrEmpty(): Boolean = (this?.size() ?: 0) == 0
fun JsonArray.isEmpty(): Boolean = this.size() == 0
operator fun JsonArray.plusAssign(o: JsonElement) = this.add(o)
operator fun JsonArray.plusAssign(o: String) = this.add(o)
operator fun JsonArray.plusAssign(o: Char) = this.add(o)
operator fun JsonArray.plusAssign(o: Number) = this.add(o)
operator fun JsonArray.plusAssign(o: Boolean) = this.add(o)

@Suppress("UNCHECKED_CAST")
inline fun <T : View> T.onClick(crossinline onClickListener: (v: T) -> Unit) {
    setOnClickListener { v: View ->
        onClickListener(v as T)
    }
}

@Suppress("UNCHECKED_CAST")
inline fun <T : CompoundButton> T.onChange(crossinline onChangeListener: (v: T, isChecked: Boolean) -> Unit) {
    setOnCheckedChangeListener { buttonView, isChecked ->
        onChangeListener(buttonView as T, isChecked)
    }
}

fun <T> LiveData<T>.observeOnce(lifecycleOwner: LifecycleOwner, observer: Observer<T>) {
    observe(lifecycleOwner, object : Observer<T> {
        override fun onChanged(t: T?) {
            observer.onChanged(t)
            removeObserver(this)
        }
    })
}

/**
 * Convert a value in dp to pixels.
 */
val Int.dp: Int
    get() = (this * Resources.getSystem().displayMetrics.density).toInt()
/**
 * Convert a value in pixels to dp.
 */
val Int.px: Int
    get() = (this / Resources.getSystem().displayMetrics.density).toInt()

@ColorInt
fun @receiver:AttrRes Int.resolveAttr(context: Context?): Int {
    val typedValue = TypedValue()
    context?.theme?.resolveAttribute(this, typedValue, true)
    return typedValue.data
}
@ColorInt
fun @receiver:ColorRes Int.resolveColor(context: Context): Int {
    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        context.resources.getColor(this, context.theme)
    }
    else {
        context.resources.getColor(this)
    }
}
fun @receiver:DrawableRes Int.resolveDrawable(context: Context): Drawable {
    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        context.resources.getDrawable(this, context.theme)
    }
    else {
        context.resources.getDrawable(this)
    }
}

fun View.findParentById(targetId: Int): View? {
    if (id == targetId) {
        return this
    }
    val viewParent = this.parent ?: return null
    if (viewParent is View) {
        return viewParent.findParentById(targetId)
    }
    return null
}

fun CoroutineScope.startCoroutineTimer(delayMillis: Long = 0, repeatMillis: Long = 0, action: () -> Unit) = launch {
    delay(delayMillis)
    if (repeatMillis > 0) {
        while (true) {
            action()
            delay(repeatMillis)
        }
    } else {
        action()
    }
}

operator fun Time?.compareTo(other: Time?): Int {
    if (this == null && other == null)
        return 0
    if (this == null)
        return -1
    if (other == null)
        return 1
    return this.compareTo(other)
}

operator fun StringBuilder.plusAssign(str: String?) {
    this.append(str)
}

fun Context.timeTill(time: Int, delimiter: String = " ", countInSeconds: Boolean = false): String {
    val parts = mutableListOf<Pair<Int, Int>>()

    val hours = time / 3600
    val minutes = (time - hours*3600) / 60
    val seconds = time - minutes*60 - hours*3600

    if (!countInSeconds) {
        var prefixAdded = false
        if (hours > 0) {
            if (!prefixAdded) parts += R.plurals.time_till_text to hours
            prefixAdded = true
            parts += R.plurals.time_till_hours to hours
        }
        if (minutes > 0) {
            if (!prefixAdded) parts += R.plurals.time_till_text to minutes
            prefixAdded = true
            parts += R.plurals.time_till_minutes to minutes
        }
        if (hours == 0 && minutes < 10) {
            if (!prefixAdded) parts += R.plurals.time_till_text to seconds
            prefixAdded = true
            parts += R.plurals.time_till_seconds to seconds
        }
    } else {
        parts += R.plurals.time_till_text to time
        parts += R.plurals.time_till_seconds to time
    }

    return parts.joinToString(delimiter) { resources.getQuantityString(it.first, it.second, it.second) }
}

fun Context.timeLeft(time: Int, delimiter: String = " ", countInSeconds: Boolean = false): String {
    val parts = mutableListOf<Pair<Int, Int>>()

    val hours = time / 3600
    val minutes = (time - hours*3600) / 60
    val seconds = time - minutes*60 - hours*3600

    if (!countInSeconds) {
        var prefixAdded = false
        if (hours > 0) {
            if (!prefixAdded) parts += R.plurals.time_left_text to hours
            prefixAdded = true
            parts += R.plurals.time_left_hours to hours
        }
        if (minutes > 0) {
            if (!prefixAdded) parts += R.plurals.time_left_text to minutes
            prefixAdded = true
            parts += R.plurals.time_left_minutes to minutes
        }
        if (hours == 0 && minutes < 10) {
            if (!prefixAdded) parts += R.plurals.time_left_text to seconds
            prefixAdded = true
            parts += R.plurals.time_left_seconds to seconds
        }
    } else {
        parts += R.plurals.time_left_text to time
        parts += R.plurals.time_left_seconds to time
    }

    return parts.joinToString(delimiter) { resources.getQuantityString(it.first, it.second, it.second) }
}

inline fun <reified T> Any?.instanceOfOrNull(): T? {
    return when (this) {
        is T -> this
        else -> null
    }
}

fun Drawable.setTintColor(color: Int): Drawable {
    colorFilter = PorterDuffColorFilter(
            color,
            PorterDuff.Mode.SRC_ATOP
    )
    return this
}

inline fun <T> List<T>.ifNotEmpty(block: (List<T>) -> Unit) {
    if (!isEmpty())
        block(this)
}

val String.firstLettersName: String
    get() {
        var nameShort = ""
        this.split(" ").forEach {
            if (it.isBlank())
                return@forEach
            nameShort += it[0].toLowerCase()
        }
        return nameShort
    }

val Throwable.stackTraceString: String
    get() {
        val sw = StringWriter()
        printStackTrace(PrintWriter(sw))
        return sw.toString()
    }

inline fun <T> LongSparseArray<T>.filter(predicate: (T) -> Boolean): List<T> {
    val destination = ArrayList<T>()
    this.forEach { _, element -> if (predicate(element)) destination.add(element) }
    return destination
}

fun CharSequence.replace(oldValue: String, newValue: CharSequence, ignoreCase: Boolean = false): CharSequence =
        splitToSequence(oldValue, ignoreCase = ignoreCase).toList().concat(newValue)

fun Int.toColorStateList(): ColorStateList {
    val states = arrayOf(
        intArrayOf( android.R.attr.state_enabled ),
        intArrayOf(-android.R.attr.state_enabled ),
        intArrayOf(-android.R.attr.state_checked ),
        intArrayOf( android.R.attr.state_pressed )
    )

    val colors = intArrayOf(
            this,
            this,
            this,
            this
    )

    return ColorStateList(states, colors);
}

fun SpannableStringBuilder.appendText(text: CharSequence): SpannableStringBuilder {
    append(text)
    return this
}
fun SpannableStringBuilder.appendSpan(text: CharSequence, what: Any, flags: Int): SpannableStringBuilder {
    val start: Int = length
    append(text)
    setSpan(what, start, length, flags)
    return this
}

fun joinNotNullStrings(delimiter: String = "", vararg parts: String?): String {
    var first = true
    val sb = StringBuilder()
    for (part in parts) {
        if (part == null)
            continue
        if (!first)
            sb += delimiter
        first = false
        sb += part
    }
    return sb.toString()
}

fun String.notEmptyOrNull(): String? {
    return if (isEmpty())
        null
    else
        this
}

fun String.base64Encode(): String {
    return encodeToString(toByteArray(), NO_WRAP)
}
fun ByteArray.base64Encode(): String {
    return encodeToString(this, NO_WRAP)
}
fun String.base64Decode(): ByteArray {
    return Base64.decode(this, Base64.DEFAULT)
}
fun String.base64DecodeToString(): String {
    return Base64.decode(this, Base64.DEFAULT).toString(Charset.defaultCharset())
}