mihon/app/src/main/java/eu/kanade/tachiyomi/util/ContextExtensions.kt

package eu.kanade.tachiyomi.util

import android.app.ActivityManager
import android.app.Notification
import android.app.NotificationManager
import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.content.IntentFilter
import android.content.pm.PackageManager
import android.content.res.Resources
import android.net.ConnectivityManager
import android.os.PowerManager
import android.support.annotation.AttrRes
import android.support.annotation.StringRes
import android.support.v4.app.NotificationCompat
import android.support.v4.content.ContextCompat
import android.support.v4.content.LocalBroadcastManager
import android.widget.Toast
import com.nononsenseapps.filepicker.FilePickerActivity
import eu.kanade.tachiyomi.widget.CustomLayoutPickerActivity

/**
 * Display a toast in this context.
 *
 * @param resource the text resource.
 * @param duration the duration of the toast. Defaults to short.
 */
fun Context.toast(@StringRes resource: Int, duration: Int = Toast.LENGTH_SHORT) {
    Toast.makeText(this, resource, duration).show()
}

/**
 * Display a toast in this context.
 *
 * @param text the text to display.
 * @param duration the duration of the toast. Defaults to short.
 */
fun Context.toast(text: String?, duration: Int = Toast.LENGTH_SHORT) {
    Toast.makeText(this, text.orEmpty(), duration).show()
}

/**
 * Helper method to create a notification.
 *
 * @param id the channel id.
 * @param func the function that will execute inside the builder.
 * @return a notification to be displayed or updated.
 */
inline fun Context.notification(channelId: String, func: NotificationCompat.Builder.() -> Unit): Notification {
    val builder = NotificationCompat.Builder(this, channelId)
    builder.func()
    return builder.build()
}

/**
 * Helper method to construct an Intent to use a custom file picker.
 * @param currentDir the path the file picker will open with.
 * @return an Intent to start the file picker activity.
 */
fun Context.getFilePicker(currentDir: String): Intent {
    return Intent(this, CustomLayoutPickerActivity::class.java)
            .putExtra(FilePickerActivity.EXTRA_ALLOW_MULTIPLE, false)
            .putExtra(FilePickerActivity.EXTRA_ALLOW_CREATE_DIR, true)
            .putExtra(FilePickerActivity.EXTRA_MODE, FilePickerActivity.MODE_DIR)
            .putExtra(FilePickerActivity.EXTRA_START_PATH, currentDir)
}

/**
 * Checks if the give permission is granted.
 *
 * @param permission the permission to check.
 * @return true if it has permissions.
 */
fun Context.hasPermission(permission: String)
        = ContextCompat.checkSelfPermission(this, permission) == PackageManager.PERMISSION_GRANTED

/**
 * Returns the color for the given attribute.
 *
 * @param resource the attribute.
 */
fun Context.getResourceColor(@AttrRes resource: Int): Int {
    val typedArray = obtainStyledAttributes(intArrayOf(resource))
    val attrValue = typedArray.getColor(0, 0)
    typedArray.recycle()
    return attrValue
}

/**
 * Converts to dp.
 */
val Int.pxToDp: Int
    get() = (this / Resources.getSystem().displayMetrics.density).toInt()

/**
 * Converts to px.
 */
val Int.dpToPx: Int
    get() = (this * Resources.getSystem().displayMetrics.density).toInt()

/**
 * Property to get the notification manager from the context.
 */
val Context.notificationManager: NotificationManager
    get() = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager

/**
 * Property to get the connectivity manager from the context.
 */
val Context.connectivityManager: ConnectivityManager
    get() = getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager

/**
 * Property to get the power manager from the context.
 */
val Context.powerManager: PowerManager
    get() = getSystemService(Context.POWER_SERVICE) as PowerManager

/**
 * Function used to send a local broadcast asynchronous
 *
 * @param intent intent that contains broadcast information
 */
fun Context.sendLocalBroadcast(intent: Intent) {
    LocalBroadcastManager.getInstance(this).sendBroadcast(intent)
}

/**
 * Function used to send a local broadcast synchronous
 *
 * @param intent intent that contains broadcast information
 */
fun Context.sendLocalBroadcastSync(intent: Intent) {
    LocalBroadcastManager.getInstance(this).sendBroadcastSync(intent)
}

/**
 * Function used to register local broadcast
 *
 * @param receiver receiver that gets registered.
 */
fun Context.registerLocalReceiver(receiver: BroadcastReceiver, filter: IntentFilter) {
    LocalBroadcastManager.getInstance(this).registerReceiver(receiver, filter)
}

/**
 * Function used to unregister local broadcast
 *
 * @param receiver receiver that gets unregistered.
 */
fun Context.unregisterLocalReceiver(receiver: BroadcastReceiver) {
    LocalBroadcastManager.getInstance(this).unregisterReceiver(receiver)
}

/**
 * Returns true if the given service class is running.
 */
fun Context.isServiceRunning(serviceClass: Class<*>): Boolean {
    val className = serviceClass.name
    val manager = getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
    @Suppress("DEPRECATION")
    return manager.getRunningServices(Integer.MAX_VALUE)
            .any { className == it.service.className }
}