/*
 * 				Twidere - Twitter client for Android
 * 
 *  Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com>
 * 
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 * 
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 * 
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.mariotaku.twidere.util

import android.content.Context
import android.content.SharedPreferences
import com.bumptech.glide.Glide
import org.mariotaku.kpreferences.get
import org.mariotaku.twidere.constant.mediaPreloadKey
import org.mariotaku.twidere.constant.mediaPreloadOnWifiOnlyKey
import org.mariotaku.twidere.extension.loadProfileImage
import org.mariotaku.twidere.model.ParcelableActivity
import org.mariotaku.twidere.model.ParcelableMedia
import org.mariotaku.twidere.model.ParcelableStatus
import org.mariotaku.twidere.model.util.getActivityStatus

class MediaPreloader(val context: Context) {

    var isNetworkMetered: Boolean = true
    private var preloadEnabled: Boolean = false
    private var preloadOnWifiOnly: Boolean = true

    private val shouldPreload: Boolean get() = preloadEnabled && (!preloadOnWifiOnly || !isNetworkMetered)


    fun preloadStatus(status: ParcelableStatus) {
        if (!shouldPreload) return
        Glide.with(context).loadProfileImage(context, status, 0).preload()
        preloadMedia(status.media)
        preloadMedia(status.quoted_media)
    }

    fun preloadActivity(activity: ParcelableActivity) {
        if (!shouldPreload) return
        activity.getActivityStatus()?.let { preloadStatus(it) }
    }

    fun reloadOptions(preferences: SharedPreferences) {
        preloadEnabled = preferences[mediaPreloadKey]
        preloadOnWifiOnly = preferences[mediaPreloadOnWifiOnlyKey]
    }

    private fun preloadMedia(media: Array<ParcelableMedia>?) {
        media?.forEach { item ->
            val url = item.preview_url ?: run {
                if (item.type != ParcelableMedia.Type.IMAGE) return@run null
                return@run item.media_url
            } ?: return@forEach
            preloadPreviewImage(url)
        }
    }

    private fun preloadPreviewImage(url: String?) {
        Glide.with(context).load(url).preload()
    }

}