/* 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.logins

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.appcompat.app.AppCompatActivity
import androidx.fragment.app.Fragment
import androidx.lifecycle.lifecycleScope
import androidx.navigation.fragment.findNavController
import kotlinx.android.synthetic.main.fragment_saved_logins.view.*
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.Dispatchers.IO
import kotlinx.coroutines.ExperimentalCoroutinesApi
import kotlinx.coroutines.ObsoleteCoroutinesApi
import kotlinx.coroutines.async
import kotlinx.coroutines.launch
import mozilla.components.lib.state.ext.consumeFrom
import org.mozilla.fenix.R
import org.mozilla.fenix.components.StoreProvider
import org.mozilla.fenix.ext.components

class SavedLoginsFragment : Fragment() {
    private lateinit var savedLoginsStore: SavedLoginsFragmentStore
    private lateinit var savedLoginsView: SavedLoginsView
    private lateinit var savedLoginsInteractor: SavedLoginsInteractor

    override fun onResume() {
        super.onResume()
        activity?.title = getString(R.string.preferences_passwords_saved_logins)
        (activity as AppCompatActivity).supportActionBar?.show()
    }

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        val view = inflater.inflate(R.layout.fragment_saved_logins, container, false)
        savedLoginsStore = StoreProvider.get(this) {
            SavedLoginsFragmentStore(
                SavedLoginsFragmentState(
                    items = listOf()
                )
            )
        }
        savedLoginsInteractor = SavedLoginsInteractor(::itemClicked)
        savedLoginsView = SavedLoginsView(view.savedLoginsLayout, savedLoginsInteractor)
        loadAndMapLogins()
        return view
    }

    @ObsoleteCoroutinesApi
    @ExperimentalCoroutinesApi
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        consumeFrom(savedLoginsStore) {
            savedLoginsView.update(it)
        }
    }

    private fun itemClicked(item: SavedLoginsItem) {
        val directions =
            SavedLoginsFragmentDirections.actionSavedLoginsFragmentToSavedLoginSiteInfoFragment(item)
        findNavController().navigate(directions)
    }

    private fun loadAndMapLogins() {
        lifecycleScope.launch(IO) {
            val syncedLogins = async {
                context!!.components.core.loginsStorage.withUnlocked {
                    it.list().await().map { item ->
                        SavedLoginsItem(
                            item.hostname,
                            item.username,
                            item.password
                        )
                    }
                }
            }.await()
            launch(Dispatchers.Main) {
                savedLoginsStore.dispatch(SavedLoginsFragmentAction.UpdateLogins(syncedLogins))
            }
        }
    }
}