/*
 * Copyright 2018 Allan Wang
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package ca.allanwang.kau.kpref.activity.items

import android.annotation.SuppressLint
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ImageView
import android.widget.LinearLayout
import android.widget.TextView
import androidx.annotation.CallSuper
import androidx.annotation.IdRes
import androidx.annotation.LayoutRes
import androidx.annotation.StringRes
import androidx.recyclerview.widget.RecyclerView
import ca.allanwang.kau.adapters.ThemableIItem
import ca.allanwang.kau.adapters.ThemableIItemDelegate
import ca.allanwang.kau.kpref.activity.GlobalOptions
import ca.allanwang.kau.kpref.activity.KPrefItemActions
import ca.allanwang.kau.kpref.activity.KPrefMarker
import ca.allanwang.kau.kpref.activity.R
import ca.allanwang.kau.utils.INVALID_ID
import ca.allanwang.kau.utils.adjustAlpha
import ca.allanwang.kau.utils.buildIsLollipopAndUp
import ca.allanwang.kau.utils.gone
import ca.allanwang.kau.utils.setIcon
import ca.allanwang.kau.utils.visible
import com.mikepenz.fastadapter.items.AbstractItem
import com.mikepenz.iconics.typeface.IIcon

/**
 * Created by Allan Wang on 2017-06-05.
 *
 * Core class containing nothing but the view items
 */

abstract class KPrefItemCore(val core: CoreContract) :
    AbstractItem<KPrefItemCore.ViewHolder>(),
    KPrefItemActions by core,
    ThemableIItem by ThemableIItemDelegate() {

    final override fun getViewHolder(v: View) = ViewHolder(v)

    protected fun ViewHolder.updateDesc() {
        val descRes = core.descFun()
        if (descRes != INVALID_ID)
            desc?.visible()?.setText(descRes)
        else
            desc?.gone()
    }

    protected fun ViewHolder.updateTitle() {
        title.setText(core.titleFun())
    }

    /**
     * NewApi is suppressed as [buildIsLollipopAndUp] already covers it
     */
    @SuppressLint("NewApi")
    @CallSuper
    override fun bindView(holder: ViewHolder, payloads: List<Any>) {
        super.bindView(holder, payloads)
        with(holder) {
            updateTitle()
            updateDesc()
            if (core.iicon != null) icon?.visible()?.setIcon(core.iicon, 24)
            else icon?.gone()
            innerFrame?.removeAllViews()
            withTextColor {
                title.setTextColor(it)
                desc?.setTextColor(it.adjustAlpha(0.65f))
            }
            if (buildIsLollipopAndUp)
                withAccentColor {
                    icon?.drawable?.setTint(it)
                }
        }
    }

    protected inline fun withAccentColor(action: (color: Int) -> Unit) =
        withColor(core.globalOptions.accentColor, action)

    protected inline fun withTextColor(action: (color: Int) -> Unit) =
        withColor(core.globalOptions.textColor, action)

    protected inline fun withColor(
        noinline supplier: (() -> Int)?,
        action: (color: Int) -> Unit
    ) {
        val color = supplier?.invoke() ?: return
        action(color)
    }

    open fun onClick(itemView: View) = Unit

    override fun unbindView(holder: ViewHolder) {
        super.unbindView(holder)
        with(holder) {
            title.text = null
            desc?.text = null
            icon?.setImageDrawable(null)
            innerFrame?.removeAllViews()
            lowerFrame?.removeAllViews()
        }
    }

    /**
     * Core values for all kpref items
     */
    @KPrefMarker
    interface CoreContract : KPrefItemActions {
        val globalOptions: GlobalOptions
        val titleId: Int
        var titleFun: () -> Int
        @setparam:StringRes
        var descRes: Int
        var descFun: () -> Int
        var iicon: IIcon?
        var visible: () -> Boolean
    }

    /**
     * Default implementation of [CoreContract]
     */
    class CoreBuilder(
        override val globalOptions: GlobalOptions,
        override val titleId: Int
    ) : CoreContract {
        override var descRes: Int = INVALID_ID
            set(value) {
                field = value
                descFun = { field }
            }
        override var descFun = { INVALID_ID }
        override var iicon: IIcon? = null
        override var visible = { true }
        override var titleFun = { titleId }

        override fun reloadSelf() {
            globalOptions.reloadByTitle(titleId)
        }
    }

    class ViewHolder(v: View) : RecyclerView.ViewHolder(v) {
        val title: TextView = v.findViewById(R.id.kau_pref_title)
        val container: ViewGroup? = v.findViewById(R.id.kau_pref_container)
        val desc: TextView? = v.findViewById(R.id.kau_pref_desc)
        val icon: ImageView? = v.findViewById(R.id.kau_pref_icon)
        val innerFrame: LinearLayout? = v.findViewById(R.id.kau_pref_inner_frame)
        val lowerFrame: LinearLayout? = v.findViewById(R.id.kau_pref_lower_frame)
        val innerView: View?
            get() = itemView.findViewById(R.id.kau_pref_inner_content)
        val lowerContent: View?
            get() = itemView.findViewById(R.id.kau_pref_lower_content)

        inline fun <reified T : View> bindInnerView(@LayoutRes id: Int) = bindInnerView(id) { _: T -> }

        inline fun <reified T : View> bindInnerView(@LayoutRes id: Int, onFirstBind: (T) -> Unit): T {
            val innerFrame = this.innerFrame
                ?: throw IllegalStateException("Cannot bind inner view when innerFrame does not exist")
            if (innerView !is T) {
                innerFrame.removeAllViews()
                LayoutInflater.from(innerFrame.context).inflate(id, innerFrame)
                onFirstBind(innerView as T)
            }
            return innerView as T
        }

        inline fun <reified T : View> bindLowerView(@LayoutRes id: Int) = bindLowerView(id) { _: T -> }

        inline fun <reified T : View> bindLowerView(@LayoutRes id: Int, onFirstBind: (T) -> Unit): T {
            val lowerFrame = this.lowerFrame
                ?: throw IllegalStateException("Cannot bind inner view when lowerContent does not exist")
            if (lowerContent !is T) {
                lowerFrame.removeAllViews()
                LayoutInflater.from(lowerFrame.context).inflate(id, lowerFrame)
                onFirstBind(lowerContent as T)
            }
            return lowerContent as T
        }

        operator fun get(@IdRes id: Int): View = itemView.findViewById(id)
    }
}