package com.pitchedapps.frost.web

import android.annotation.SuppressLint
import android.content.Context
import android.graphics.Color
import android.os.Build
import android.support.v4.widget.SwipeRefreshLayout
import android.util.AttributeSet
import android.view.View
import android.widget.FrameLayout
import android.widget.ProgressBar
import ca.allanwang.kau.utils.bindView
import ca.allanwang.kau.utils.tint
import ca.allanwang.kau.utils.visible
import ca.allanwang.kau.utils.withAlpha
import com.pitchedapps.frost.R
import com.pitchedapps.frost.facebook.FbTab
import com.pitchedapps.frost.facebook.USER_AGENT_BASIC
import com.pitchedapps.frost.utils.Prefs
import io.reactivex.android.schedulers.AndroidSchedulers

/**
 * Created by Allan Wang on 2017-06-01.
 */
class FrostWebView @JvmOverloads constructor(
        context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0, defStyleRes: Int = 0
) : FrameLayout(context, attrs, defStyleAttr, defStyleRes), SwipeRefreshLayout.OnRefreshListener {

    val refresh: SwipeRefreshLayout by bindView(R.id.swipe_refresh)
    val web: FrostWebViewCore by bindView(R.id.frost_webview_core)
    val progress: ProgressBar by bindView(R.id.progress_bar)

    init {
        inflate(getContext(), R.layout.swipe_webview, this)
        progress.tint(Prefs.textColor.withAlpha(180))
        refresh.setColorSchemeColors(Prefs.iconColor)
        refresh.setProgressBackgroundColorSchemeColor(Prefs.headerColor.withAlpha(255))
        web.progressObservable.observeOn(AndroidSchedulers.mainThread()).subscribe {
            progress.visibility = if (it == 100) View.INVISIBLE else View.VISIBLE
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) progress.setProgress(it, true)
            else progress.progress = it
        }
        web.refreshObservable.observeOn(AndroidSchedulers.mainThread()).subscribe {
            refresh.isRefreshing = it
        }
        refresh.setOnRefreshListener(this)
        addOnAttachStateChangeListener(object : OnAttachStateChangeListener {
            override fun onViewDetachedFromWindow(v: View) {
                web.visible()
            }

            override fun onViewAttachedToWindow(v: View) {}
        })
    }

    @SuppressLint("SetJavaScriptEnabled")
    fun setupWebview(url: String, enum: FbTab? = null) {
        with(web) {
            baseUrl = url
            baseEnum = enum
            with(settings) {
                javaScriptEnabled = true
                if (url.contains("com/message"))
                    userAgentString = USER_AGENT_BASIC
                allowFileAccess = true
                textZoom = Prefs.webTextScaling
            }
            setLayerType(View.LAYER_TYPE_HARDWARE, null)
            frostWebClient = baseEnum?.webClient?.invoke(this) ?: FrostWebViewClient(this)
            webViewClient = frostWebClient
            webChromeClient = FrostChromeClient(this)
            addJavascriptInterface(FrostJSI(context, this), "Frost")
            setBackgroundColor(Color.TRANSPARENT)
        }
    }

    //Some urls have postJavascript injections so make sure we load the base url
    override fun onRefresh() {
        when (web.baseUrl) {
            FbTab.MENU.url -> web.loadBaseUrl(true)
            else -> web.reload(true)
        }
    }

    fun onBackPressed(): Boolean {
        if (web.canGoBack()) {
            web.goBack()
            return true
        }
        return false
    }
}