package chat.rocket.android.util.extensions

import android.app.Activity
import android.content.Context
import android.support.annotation.LayoutRes
import android.support.annotation.StringRes
import android.support.v4.app.Fragment
import android.support.v7.app.AppCompatActivity
import android.support.v7.widget.LinearLayoutManager
import android.support.v7.widget.RecyclerView
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.view.inputmethod.InputMethodManager
import android.widget.Toast
import chat.rocket.android.R

fun View.setVisible(visible: Boolean) {
    visibility = if (visible) {
        View.VISIBLE
    } else {
        View.GONE
    }
}

fun View.isVisible(): Boolean {
    return visibility == View.VISIBLE
}

fun ViewGroup.inflate(@LayoutRes resource: Int): View = LayoutInflater.from(context).inflate(resource, this, false)

fun AppCompatActivity.addFragment(tag: String, layoutId: Int, newInstance: () -> Fragment) {
    val fragment = supportFragmentManager.findFragmentByTag(tag) ?: newInstance()
    supportFragmentManager.beginTransaction()
            .replace(layoutId, fragment, tag)
            .commit()
}

fun AppCompatActivity.addFragmentBackStack(tag: String, layoutId: Int, newInstance: () -> Fragment) {
    val fragment = supportFragmentManager.findFragmentByTag(tag) ?: newInstance()
    supportFragmentManager.beginTransaction()
            .setCustomAnimations(R.anim.enter_from_right, R.anim.exit_to_left, R.anim.enter_from_left, R.anim.exit_to_right)
            .replace(layoutId, fragment, tag)
            .addToBackStack(tag)
            .commit()
}

fun Activity.hideKeyboard() {
    if (currentFocus != null) {
        val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
        imm.hideSoftInputFromWindow(currentFocus.windowToken, InputMethodManager.RESULT_UNCHANGED_SHOWN)
    }
}

fun Activity.showToast(@StringRes resource: Int, duration: Int = Toast.LENGTH_SHORT) = showToast(getString(resource), duration)

fun Activity.showToast(message: String, duration: Int = Toast.LENGTH_SHORT) = Toast.makeText(this, message, duration).show()

fun Fragment.showToast(@StringRes resource: Int, duration: Int = Toast.LENGTH_SHORT) = showToast(getString(resource), duration)

fun Fragment.showToast(message: String, duration: Int = Toast.LENGTH_SHORT) = activity!!.showToast(message, duration)

fun RecyclerView.isAtBottom(): Boolean {
    val manager: RecyclerView.LayoutManager? = layoutManager
    if (manager is LinearLayoutManager) {
        return manager.findFirstVisibleItemPosition() == 0
    }

    return false // or true??? we can't determine the first visible item.
}