/*
 * Nextcloud Android client application
 *
 * @author Tobias Kaminsky
 * Copyright (C) 2020 Nextcloud GmbH
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or 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 AFFERO GENERAL PUBLIC LICENSE for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.nextcloud.ui

import android.annotation.SuppressLint
import android.app.Dialog
import android.content.Context
import android.os.Bundle
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.view.inputmethod.InputMethodManager
import android.widget.AdapterView
import android.widget.AdapterView.OnItemSelectedListener
import android.widget.ArrayAdapter
import android.widget.ImageView
import android.widget.TextView
import androidx.annotation.VisibleForTesting
import androidx.fragment.app.DialogFragment
import androidx.recyclerview.widget.LinearLayoutManager
import com.google.android.material.card.MaterialCardView
import com.google.android.material.dialog.MaterialAlertDialogBuilder
import com.google.gson.Gson
import com.google.gson.reflect.TypeToken
import com.nextcloud.client.account.User
import com.nextcloud.client.account.UserAccountManager
import com.nextcloud.client.core.AsyncRunner
import com.nextcloud.client.di.Injectable
import com.nextcloud.client.network.ClientFactory
import com.owncloud.android.R
import com.owncloud.android.databinding.DialogSetStatusBinding
import com.owncloud.android.datamodel.ArbitraryDataProvider
import com.owncloud.android.lib.resources.users.ClearAt
import com.owncloud.android.lib.resources.users.PredefinedStatus
import com.owncloud.android.lib.resources.users.Status
import com.owncloud.android.lib.resources.users.StatusType
import com.owncloud.android.ui.activity.BaseActivity
import com.owncloud.android.ui.adapter.PredefinedStatusClickListener
import com.owncloud.android.ui.adapter.PredefinedStatusListAdapter
import com.owncloud.android.utils.DisplayUtils
import com.owncloud.android.utils.theme.newm3.ViewThemeUtils
import com.vanniktech.emoji.EmojiManager
import com.vanniktech.emoji.EmojiPopup
import com.vanniktech.emoji.google.GoogleEmojiProvider
import java.util.Calendar
import java.util.Locale
import javax.inject.Inject

private const val ARG_CURRENT_USER_PARAM = "currentUser"
private const val ARG_CURRENT_STATUS_PARAM = "currentStatus"

private const val POS_DONT_CLEAR = 0
private const val POS_HALF_AN_HOUR = 1
private const val POS_AN_HOUR = 2
private const val POS_FOUR_HOURS = 3
private const val POS_TODAY = 4
private const val POS_END_OF_WEEK = 5

private const val ONE_SECOND_IN_MILLIS = 1000
private const val ONE_MINUTE_IN_SECONDS = 60
private const val THIRTY_MINUTES = 30
private const val FOUR_HOURS = 4
private const val LAST_HOUR_OF_DAY = 23
private const val LAST_MINUTE_OF_HOUR = 59
private const val LAST_SECOND_OF_MINUTE = 59

private const val CLEAR_AT_TYPE_PERIOD = "period"
private const val CLEAR_AT_TYPE_END_OF = "end-of"

class SetStatusDialogFragment :
    DialogFragment(),
    PredefinedStatusClickListener,
    Injectable {

    private lateinit var binding: DialogSetStatusBinding

    private var currentUser: User? = null
    private var currentStatus: Status? = null
    private lateinit var accountManager: UserAccountManager
    private lateinit var predefinedStatus: ArrayList<PredefinedStatus>
    private lateinit var adapter: PredefinedStatusListAdapter
    private var selectedPredefinedMessageId: String? = null
    private var clearAt: Long? = -1
    private lateinit var popup: EmojiPopup

    @Inject
    lateinit var arbitraryDataProvider: ArbitraryDataProvider

    @Inject
    lateinit var asyncRunner: AsyncRunner

    @Inject
    lateinit var clientFactory: ClientFactory

    @Inject
    lateinit var viewThemeUtils: ViewThemeUtils

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        arguments?.let {
            currentUser = it.getParcelable(ARG_CURRENT_USER_PARAM)
            currentStatus = it.getParcelable(ARG_CURRENT_STATUS_PARAM)

            val json = arbitraryDataProvider.getValue(currentUser, ArbitraryDataProvider.PREDEFINED_STATUS)

            if (json.isNotEmpty()) {
                val myType = object : TypeToken<ArrayList<PredefinedStatus>>() {}.type
                predefinedStatus = Gson().fromJson(json, myType)
            }
        }

        EmojiManager.install(GoogleEmojiProvider())
    }

    @SuppressLint("InflateParams")
    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        binding = DialogSetStatusBinding.inflate(layoutInflater)

        val builder = MaterialAlertDialogBuilder(requireContext()).setView(binding.root)

        viewThemeUtils.dialog.colorMaterialAlertDialogBackground(binding.statusView.context, builder)

        return builder.create()
    }

    @SuppressLint("DefaultLocale")
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        accountManager = (activity as BaseActivity).userAccountManager

        currentStatus?.let {
            updateCurrentStatusViews(it)
        }

        adapter = PredefinedStatusListAdapter(this, requireContext())
        if (this::predefinedStatus.isInitialized) {
            adapter.list = predefinedStatus
        }
        binding.predefinedStatusList.adapter = adapter
        binding.predefinedStatusList.layoutManager = LinearLayoutManager(context)

        binding.onlineStatus.setOnClickListener { setStatus(StatusType.ONLINE) }
        binding.dndStatus.setOnClickListener { setStatus(StatusType.DND) }
        binding.awayStatus.setOnClickListener { setStatus(StatusType.AWAY) }
        binding.invisibleStatus.setOnClickListener { setStatus(StatusType.INVISIBLE) }

        binding.clearStatus.setOnClickListener { clearStatus() }
        binding.setStatus.setOnClickListener { setStatusMessage() }
        binding.emoji.setOnClickListener { popup.show() }

        popup = EmojiPopup.Builder
            .fromRootView(view)
            .setOnEmojiClickListener { _, _ ->
                popup.dismiss()
                binding.emoji.clearFocus()
                val imm: InputMethodManager = context?.getSystemService(Context.INPUT_METHOD_SERVICE) as
                    InputMethodManager
                imm.hideSoftInputFromWindow(binding.emoji.windowToken, 0)
            }
            .build(binding.emoji)
        binding.emoji.disableKeyboardInput(popup)
        binding.emoji.forceSingleEmoji()

        val adapter = ArrayAdapter<String>(requireContext(), android.R.layout.simple_spinner_item)
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
        adapter.add(getString(R.string.dontClear))
        adapter.add(getString(R.string.thirtyMinutes))
        adapter.add(getString(R.string.oneHour))
        adapter.add(getString(R.string.fourHours))
        adapter.add(getString(R.string.today))
        adapter.add(getString(R.string.thisWeek))

        binding.clearStatusAfterSpinner.apply {
            this.adapter = adapter
            onItemSelectedListener = object : OnItemSelectedListener {
                override fun onItemSelected(parent: AdapterView<*>, view: View?, position: Int, id: Long) {
                    setClearStatusAfterValue(position)
                }

                override fun onNothingSelected(parent: AdapterView<*>?) {
                    // nothing to do
                }
            }
        }

        viewThemeUtils.material.colorMaterialButtonText(binding.clearStatus)
        viewThemeUtils.material.colorMaterialButtonPrimaryFilled(binding.setStatus)
        viewThemeUtils.material.colorTextInputLayout(binding.customStatusInputContainer)

        viewThemeUtils.platform.themeDialog(binding.root)
    }

    private fun updateCurrentStatusViews(it: Status) {
        binding.emoji.setText(it.icon)
        binding.customStatusInput.text?.clear()
        binding.customStatusInput.setText(it.message)
        visualizeStatus(it.status)

        if (it.clearAt > 0) {
            binding.clearStatusAfterSpinner.visibility = View.GONE
            binding.remainingClearTime.apply {
                binding.clearStatusMessageTextView.text = getString(R.string.clear_status_message)
                visibility = View.VISIBLE
                text = DisplayUtils.getRelativeTimestamp(context, it.clearAt * ONE_SECOND_IN_MILLIS, true)
                    .toString()
                    .replaceFirstChar { it.lowercase(Locale.getDefault()) }
                setOnClickListener {
                    visibility = View.GONE
                    binding.clearStatusAfterSpinner.visibility = View.VISIBLE
                    binding.clearStatusMessageTextView.text = getString(R.string.clear_status_message_after)
                }
            }
        }
    }

    private fun setClearStatusAfterValue(item: Int) {
        clearAt = when (item) {
            POS_DONT_CLEAR -> null // don't clear
            POS_HALF_AN_HOUR -> {
                // 30 minutes
                System.currentTimeMillis() / ONE_SECOND_IN_MILLIS + THIRTY_MINUTES * ONE_MINUTE_IN_SECONDS
            }
            POS_AN_HOUR -> {
                // one hour
                System.currentTimeMillis() / ONE_SECOND_IN_MILLIS + ONE_MINUTE_IN_SECONDS * ONE_MINUTE_IN_SECONDS
            }
            POS_FOUR_HOURS -> {
                // four hours
                System.currentTimeMillis() / ONE_SECOND_IN_MILLIS +
                    FOUR_HOURS * ONE_MINUTE_IN_SECONDS * ONE_MINUTE_IN_SECONDS
            }
            POS_TODAY -> {
                // today
                val date = getLastSecondOfToday()
                dateToSeconds(date)
            }
            POS_END_OF_WEEK -> {
                // end of week
                val date = getLastSecondOfToday()
                while (date.get(Calendar.DAY_OF_WEEK) != Calendar.SUNDAY) {
                    date.add(Calendar.DAY_OF_YEAR, 1)
                }
                dateToSeconds(date)
            }
            else -> clearAt
        }
    }

    private fun clearAtToUnixTime(clearAt: ClearAt?): Long = when {
        clearAt?.type == CLEAR_AT_TYPE_PERIOD -> {
            System.currentTimeMillis() / ONE_SECOND_IN_MILLIS + clearAt.time.toLong()
        }
        clearAt?.type == CLEAR_AT_TYPE_END_OF && clearAt.time == "day" -> {
            val date = getLastSecondOfToday()
            dateToSeconds(date)
        }
        else -> -1
    }

    private fun getLastSecondOfToday(): Calendar {
        val date = Calendar.getInstance().apply {
            set(Calendar.HOUR_OF_DAY, LAST_HOUR_OF_DAY)
            set(Calendar.MINUTE, LAST_MINUTE_OF_HOUR)
            set(Calendar.SECOND, LAST_SECOND_OF_MINUTE)
        }
        return date
    }

    private fun dateToSeconds(date: Calendar) = date.timeInMillis / ONE_SECOND_IN_MILLIS

    private fun clearStatus() {
        asyncRunner.postQuickTask(
            ClearStatusTask(accountManager.currentOwnCloudAccount?.savedAccount, context),
            { dismiss(it) }
        )
    }

    private fun setStatus(statusType: StatusType) {
        visualizeStatus(statusType)

        asyncRunner.postQuickTask(
            SetStatusTask(
                statusType,
                accountManager.currentOwnCloudAccount?.savedAccount,
                context
            ),
            {
                if (!it) {
                    clearTopStatus()
                }
            },
            { clearTopStatus() }
        )
    }

    private fun visualizeStatus(statusType: StatusType) {
        clearTopStatus()
        val views: Triple<MaterialCardView, TextView, ImageView> = when (statusType) {
            StatusType.ONLINE -> Triple(binding.onlineStatus, binding.onlineHeadline, binding.onlineIcon)
            StatusType.AWAY -> Triple(binding.awayStatus, binding.awayHeadline, binding.awayIcon)
            StatusType.DND -> Triple(binding.dndStatus, binding.dndHeadline, binding.dndIcon)
            StatusType.INVISIBLE -> Triple(binding.invisibleStatus, binding.invisibleHeadline, binding.invisibleIcon)
            else -> {
                Log.d(TAG, "unknown status")
                return
            }
        }
        viewThemeUtils.material.colorCardViewBackground(views.first)
        viewThemeUtils.platform.colorPrimaryTextViewElement(views.second)
    }

    private fun clearTopStatus() {
        context?.let {
            val grey = it.resources.getColor(R.color.grey_200)
            binding.onlineStatus.setCardBackgroundColor(grey)
            binding.awayStatus.setCardBackgroundColor(grey)
            binding.dndStatus.setCardBackgroundColor(grey)
            binding.invisibleStatus.setCardBackgroundColor(grey)

            binding.onlineHeadline.setTextColor(resources.getColor(R.color.high_emphasis_text))
            binding.awayHeadline.setTextColor(resources.getColor(R.color.high_emphasis_text))
            binding.dndHeadline.setTextColor(resources.getColor(R.color.high_emphasis_text))
            binding.invisibleHeadline.setTextColor(resources.getColor(R.color.high_emphasis_text))

            binding.onlineIcon.imageTintList = null
            binding.awayIcon.imageTintList = null
            binding.dndIcon.imageTintList = null
            binding.invisibleIcon.imageTintList = null
        }
    }

    private fun setStatusMessage() {
        if (selectedPredefinedMessageId != null) {
            asyncRunner.postQuickTask(
                SetPredefinedCustomStatusTask(
                    selectedPredefinedMessageId!!,
                    clearAt,
                    accountManager.currentOwnCloudAccount?.savedAccount,
                    context
                ),
                { dismiss(it) }
            )
        } else {
            asyncRunner.postQuickTask(
                SetUserDefinedCustomStatusTask(
                    binding.customStatusInput.text.toString(),
                    binding.emoji.text.toString(),
                    clearAt,
                    accountManager.currentOwnCloudAccount?.savedAccount,
                    context
                ),
                { dismiss(it) }
            )
        }
    }

    private fun dismiss(boolean: Boolean) {
        if (boolean) {
            dismiss()
        }
    }

    /**
     * Fragment creator
     */
    companion object {
        private val TAG = SetStatusDialogFragment::class.simpleName

        @JvmStatic
        fun newInstance(user: User, status: Status?): SetStatusDialogFragment {
            val args = Bundle()
            args.putParcelable(ARG_CURRENT_USER_PARAM, user)
            args.putParcelable(ARG_CURRENT_STATUS_PARAM, status)
            val dialogFragment = SetStatusDialogFragment()
            dialogFragment.arguments = args
            return dialogFragment
        }
    }

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
        return binding.root
    }

    override fun onClick(predefinedStatus: PredefinedStatus) {
        selectedPredefinedMessageId = predefinedStatus.id
        clearAt = clearAtToUnixTime(predefinedStatus.clearAt)
        binding.emoji.setText(predefinedStatus.icon)
        binding.customStatusInput.text?.clear()
        binding.customStatusInput.text?.append(predefinedStatus.message)

        binding.remainingClearTime.visibility = View.GONE
        binding.clearStatusAfterSpinner.visibility = View.VISIBLE
        binding.clearStatusMessageTextView.text = getString(R.string.clear_status_message_after)

        val clearAt = predefinedStatus.clearAt
        if (clearAt == null) {
            binding.clearStatusAfterSpinner.setSelection(0)
        } else {
            when (clearAt.type) {
                CLEAR_AT_TYPE_PERIOD -> updateClearAtViewsForPeriod(clearAt)
                CLEAR_AT_TYPE_END_OF -> updateClearAtViewsForEndOf(clearAt)
            }
        }
        setClearStatusAfterValue(binding.clearStatusAfterSpinner.selectedItemPosition)
    }

    private fun updateClearAtViewsForPeriod(clearAt: ClearAt) {
        when (clearAt.time) {
            "1800" -> binding.clearStatusAfterSpinner.setSelection(POS_HALF_AN_HOUR)
            "3600" -> binding.clearStatusAfterSpinner.setSelection(POS_AN_HOUR)
            "14400" -> binding.clearStatusAfterSpinner.setSelection(POS_FOUR_HOURS)
            else -> binding.clearStatusAfterSpinner.setSelection(POS_DONT_CLEAR)
        }
    }

    private fun updateClearAtViewsForEndOf(clearAt: ClearAt) {
        when (clearAt.time) {
            "day" -> binding.clearStatusAfterSpinner.setSelection(POS_TODAY)
            "week" -> binding.clearStatusAfterSpinner.setSelection(POS_END_OF_WEEK)
            else -> binding.clearStatusAfterSpinner.setSelection(POS_DONT_CLEAR)
        }
    }

    @VisibleForTesting
    fun setPredefinedStatus(predefinedStatus: ArrayList<PredefinedStatus>) {
        adapter.list = predefinedStatus
        binding.predefinedStatusList.adapter?.notifyDataSetChanged()
    }
}