/* This Source Code Form is subject to the terms of the Mozilla Public
   License, v. 2.0. If a copy of the MPL was not distributed with this
   file, You can obtain one at http://mozilla.org/MPL/2.0/. */

package org.mozilla.fenix.home.tabs

import android.app.Activity
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.constraintlayout.widget.ConstraintLayout
import androidx.fragment.app.FragmentActivity
import androidx.navigation.Navigation
import androidx.recyclerview.widget.DefaultItemAnimator
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import io.reactivex.Observable
import io.reactivex.Observer
import io.reactivex.functions.Consumer
import kotlinx.android.synthetic.main.tab_list_header.view.*
import org.mozilla.fenix.R
import org.mozilla.fenix.ext.increaseTapArea
import org.mozilla.fenix.home.HomeFragment
import org.mozilla.fenix.home.HomeFragmentDirections
import org.mozilla.fenix.home.sessions.CurrentSessionBottomSheetFragment
import org.mozilla.fenix.mvi.UIView

class TabsUIView(
    container: ViewGroup,
    actionEmitter: Observer<TabsAction>,
    isPrivate: Boolean,
    changesObservable: Observable<TabsChange>
) :
    UIView<TabsState, TabsAction, TabsChange>(container, actionEmitter, changesObservable) {

    private val header: ConstraintLayout = LayoutInflater.from(container.context)
        .inflate(R.layout.tab_list_header, container, true)
        .findViewById(R.id.tabs_header)

    override val view: RecyclerView = LayoutInflater.from(container.context)
        .inflate(R.layout.component_tabs, container, true)
        .findViewById(R.id.tabs_list)

    private val tabsAdapter = TabsAdapter(actionEmitter)

    init {
        view.apply {
            layoutManager = LinearLayoutManager(container.context)
            adapter = tabsAdapter
            itemAnimator = DefaultItemAnimator()
        }
        header.add_tab_button.increaseTapArea(HomeFragment.addTabButtonIncreaseDps)
        header.add_tab_button.setOnClickListener {
            val directions = HomeFragmentDirections.actionHomeFragmentToSearchFragment(null)
            Navigation.findNavController(it).navigate(directions)
        }
        header.tabs_overflow_button.increaseTapArea(HomeFragment.overflowButtonIncreaseDps)
        header.tabs_overflow_button.setOnClickListener {
            if (view.context as? Activity != null) {
                CurrentSessionBottomSheetFragment().show(
                    (view.context as FragmentActivity).supportFragmentManager,
                    overflowFragmentTag
                )
            }
        }
    }

    override fun updateView() = Consumer<TabsState> {
        tabsAdapter.sessions = it.sessions
        header.visibility = if (it.sessions.isEmpty()) View.GONE else View.VISIBLE
    }

    companion object {
        const val overflowFragmentTag = "current session overflow"
    }
}