/*
 * Copyright 2018 Allan Wang
 *
 * 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 com.pitchedapps.frost.activities

import android.app.Activity
import android.content.res.ColorStateList
import android.os.Bundle
import android.view.View
import android.view.animation.AnimationUtils
import androidx.recyclerview.widget.GridLayoutManager
import androidx.recyclerview.widget.ItemTouchHelper
import androidx.recyclerview.widget.RecyclerView
import ca.allanwang.kau.kotlin.lazyContext
import ca.allanwang.kau.utils.launchMain
import ca.allanwang.kau.utils.scaleXY
import ca.allanwang.kau.utils.setIcon
import ca.allanwang.kau.utils.withAlpha
import com.mikepenz.fastadapter.adapters.FastItemAdapter
import com.mikepenz.fastadapter.drag.ItemTouchCallback
import com.mikepenz.fastadapter.drag.SimpleDragCallback
import com.mikepenz.iconics.typeface.library.googlematerial.GoogleMaterial
import com.pitchedapps.frost.R
import com.pitchedapps.frost.databinding.ActivityTabCustomizerBinding
import com.pitchedapps.frost.db.GenericDao
import com.pitchedapps.frost.db.TAB_COUNT
import com.pitchedapps.frost.db.getTabs
import com.pitchedapps.frost.db.saveTabs
import com.pitchedapps.frost.facebook.FbItem
import com.pitchedapps.frost.iitems.TabIItem
import com.pitchedapps.frost.utils.L
import dagger.hilt.android.AndroidEntryPoint
import kotlinx.coroutines.NonCancellable
import kotlinx.coroutines.launch
import java.util.Collections
import javax.inject.Inject

/**
 * Created by Allan Wang on 26/11/17.
 */
@AndroidEntryPoint
class TabCustomizerActivity : BaseActivity() {

    @Inject
    lateinit var genericDao: GenericDao

    private val adapter = FastItemAdapter<TabIItem>()

    private val wobble = lazyContext { AnimationUtils.loadAnimation(it, R.anim.rotate_delta) }

    private lateinit var binding: ActivityTabCustomizerBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityTabCustomizerBinding.inflate(layoutInflater)
        setContentView(binding.root)
        binding.init()
    }

    fun ActivityTabCustomizerBinding.init() {
        pseudoToolbar.setBackgroundColor(themeProvider.headerColor)

        tabRecycler.layoutManager =
            GridLayoutManager(this@TabCustomizerActivity, TAB_COUNT, RecyclerView.VERTICAL, false)
        tabRecycler.adapter = adapter
        tabRecycler.setHasFixedSize(true)

        divider.setBackgroundColor(themeProvider.textColor.withAlpha(30))
        instructions.setTextColor(themeProvider.textColor)

        launch {
            val tabs = genericDao.getTabs().toMutableList()
            L.d { "Tabs $tabs" }
            val remaining = FbItem.values().filter { it.name[0] != '_' }.toMutableList()
            remaining.removeAll(tabs)
            tabs.addAll(remaining)
            adapter.set(tabs.map { TabIItem(it, themeProvider) })

            bindSwapper(adapter, tabRecycler)

            adapter.onClickListener = { view, _, _, _ -> view!!.wobble(); true }
        }

        setResult(Activity.RESULT_CANCELED)

        fabSave.setIcon(GoogleMaterial.Icon.gmd_check, themeProvider.iconColor)
        fabSave.backgroundTintList = ColorStateList.valueOf(themeProvider.accentColor)
        fabSave.setOnClickListener {
            launchMain(NonCancellable) {
                val tabs = adapter.adapterItems.subList(0, TAB_COUNT).map(TabIItem::item)
                genericDao.saveTabs(tabs)
                setResult(Activity.RESULT_OK)
                finish()
            }
        }
        fabCancel.setIcon(GoogleMaterial.Icon.gmd_close, themeProvider.iconColor)
        fabCancel.backgroundTintList = ColorStateList.valueOf(themeProvider.accentColor)
        fabCancel.setOnClickListener { finish() }
        activityThemer.setFrostColors {
            themeWindow = true
        }
    }

    private fun View.wobble() = startAnimation(wobble(context))

    private fun bindSwapper(adapter: FastItemAdapter<*>, recycler: RecyclerView) {
        val dragCallback = TabDragCallback(SimpleDragCallback.ALL, swapper(adapter))
        ItemTouchHelper(dragCallback).attachToRecyclerView(recycler)
    }

    private fun swapper(adapter: FastItemAdapter<*>) = object : ItemTouchCallback {
        override fun itemTouchOnMove(oldPosition: Int, newPosition: Int): Boolean {
            Collections.swap(adapter.adapterItems, oldPosition, newPosition)
            adapter.notifyAdapterDataSetChanged()
            return true
        }

        override fun itemTouchDropped(oldPosition: Int, newPosition: Int) = Unit
    }

    private class TabDragCallback(
        directions: Int,
        itemTouchCallback: ItemTouchCallback
    ) : SimpleDragCallback(directions, itemTouchCallback) {

        private var draggingView: TabIItem.ViewHolder? = null

        override fun onSelectedChanged(viewHolder: RecyclerView.ViewHolder?, actionState: Int) {
            super.onSelectedChanged(viewHolder, actionState)
            when (actionState) {
                ItemTouchHelper.ACTION_STATE_DRAG -> {
                    (viewHolder as? TabIItem.ViewHolder)?.apply {
                        draggingView = this
                        itemView.animate().scaleXY(1.3f)
                        text.animate().alpha(0f)
                    }
                }
                ItemTouchHelper.ACTION_STATE_IDLE -> {
                    draggingView?.apply {
                        itemView.animate().scaleXY(1f)
                        text.animate().alpha(1f)
                    }
                    draggingView = null
                }
            }
        }
    }
}