package info.nightscout.androidaps.dialogs

import android.content.Context
import android.os.Bundle
import android.text.Editable
import android.text.TextWatcher
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import com.google.common.base.Joiner
import info.nightscout.androidaps.R
import info.nightscout.androidaps.activities.ErrorHelperActivity
import info.nightscout.androidaps.data.DetailedBolusInfo
import info.nightscout.androidaps.database.AppRepository
import info.nightscout.androidaps.database.entities.TemporaryTarget
import info.nightscout.androidaps.database.entities.UserEntry.Action
import info.nightscout.androidaps.database.entities.UserEntry.Sources
import info.nightscout.androidaps.database.entities.ValueWithUnit
import info.nightscout.androidaps.database.transactions.InsertAndCancelCurrentTemporaryTargetTransaction
import info.nightscout.androidaps.databinding.DialogCarbsBinding
import info.nightscout.androidaps.extensions.formatColor
import info.nightscout.androidaps.interfaces.*
import info.nightscout.androidaps.logging.LTag
import info.nightscout.androidaps.logging.UserEntryLogger
import info.nightscout.androidaps.plugins.configBuilder.ConstraintChecker
import info.nightscout.androidaps.plugins.iob.iobCobCalculator.GlucoseStatusProvider
import info.nightscout.androidaps.queue.Callback
import info.nightscout.androidaps.utils.*
import info.nightscout.androidaps.utils.alertDialogs.OKDialog
import info.nightscout.androidaps.utils.resources.ResourceHelper
import io.reactivex.disposables.CompositeDisposable
import io.reactivex.rxkotlin.plusAssign
import java.text.DecimalFormat
import java.util.*
import java.util.concurrent.TimeUnit
import javax.inject.Inject
import kotlin.math.max

class CarbsDialog : DialogFragmentWithDate() {

    @Inject lateinit var ctx: Context
    @Inject lateinit var rh: ResourceHelper
    @Inject lateinit var constraintChecker: ConstraintChecker
    @Inject lateinit var defaultValueHelper: DefaultValueHelper
    @Inject lateinit var profileFunction: ProfileFunction
    @Inject lateinit var iobCobCalculator: IobCobCalculator
    @Inject lateinit var glucoseStatusProvider: GlucoseStatusProvider
    @Inject lateinit var uel: UserEntryLogger
    @Inject lateinit var carbTimer: CarbTimer
    @Inject lateinit var bolusTimer: BolusTimer
    @Inject lateinit var commandQueue: CommandQueue
    @Inject lateinit var repository: AppRepository

    companion object {

        private const val FAV1_DEFAULT = 5
        private const val FAV2_DEFAULT = 10
        private const val FAV3_DEFAULT = 20
    }

    private val disposable = CompositeDisposable()

    private val textWatcher: TextWatcher = object : TextWatcher {
        override fun afterTextChanged(s: Editable) {
            validateInputs()
        }

        override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {}
        override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {}
    }

    private fun validateInputs() {
        val maxCarbs = constraintChecker.getMaxCarbsAllowed().value().toDouble()
        val time = binding.time.value.toInt()
        if (time > 12 * 60 || time < -12 * 60) {
            binding.time.value = 0.0
            ToastUtils.showToastInUiThread(ctx, rh.gs(R.string.constraintapllied))
        }
        if (binding.duration.value > 10) {
            binding.duration.value = 0.0
            ToastUtils.showToastInUiThread(ctx, rh.gs(R.string.constraintapllied))
        }
        if (binding.carbs.value.toInt() > maxCarbs) {
            binding.carbs.value = 0.0
            ToastUtils.showToastInUiThread(ctx, rh.gs(R.string.carbsconstraintapplied))
        }
    }

    private var _binding: DialogCarbsBinding? = null

    // This property is only valid between onCreateView and
    // onDestroyView.
    private val binding get() = _binding!!

    override fun onSaveInstanceState(savedInstanceState: Bundle) {
        super.onSaveInstanceState(savedInstanceState)
        savedInstanceState.putDouble("time", binding.time.value)
        savedInstanceState.putDouble("duration", binding.duration.value)
        savedInstanceState.putDouble("carbs", binding.carbs.value)
    }

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        onCreateViewGeneral()
        _binding = DialogCarbsBinding.inflate(inflater, container, false)
        return binding.root
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        if (sp.getBoolean(R.string.key_usebolusreminder, false)) {
            glucoseStatusProvider.glucoseStatusData?.let { glucoseStatus ->
                if (glucoseStatus.glucose + 3 * glucoseStatus.delta < 70.0)
                    binding.bolusReminder.visibility = View.VISIBLE
            }
        }
        val maxCarbs = constraintChecker.getMaxCarbsAllowed().value().toDouble()
        binding.time.setParams(
            savedInstanceState?.getDouble("time")
                ?: 0.0, -12 * 60.0, 12 * 60.0, 5.0, DecimalFormat("0"), false, binding.okcancel.ok, textWatcher
        )

        binding.duration.setParams(
            savedInstanceState?.getDouble("duration")
                ?: 0.0, 0.0, 10.0, 1.0, DecimalFormat("0"), false, binding.okcancel.ok, textWatcher
        )

        binding.carbs.setParams(
            savedInstanceState?.getDouble("carbs")
                ?: 0.0, 0.0, maxCarbs, 1.0, DecimalFormat("0"), false, binding.okcancel.ok, textWatcher
        )

        binding.plus1.text = toSignedString(sp.getInt(R.string.key_carbs_button_increment_1, FAV1_DEFAULT))
        binding.plus1.setOnClickListener {
            binding.carbs.value = max(
                0.0, binding.carbs.value
                    + sp.getInt(R.string.key_carbs_button_increment_1, FAV1_DEFAULT)
            )
            validateInputs()
        }

        binding.plus2.text = toSignedString(sp.getInt(R.string.key_carbs_button_increment_2, FAV2_DEFAULT))
        binding.plus2.setOnClickListener {
            binding.carbs.value = max(
                0.0, binding.carbs.value
                    + sp.getInt(R.string.key_carbs_button_increment_2, FAV2_DEFAULT)
            )
            validateInputs()
        }

        binding.plus3.text = toSignedString(sp.getInt(R.string.key_carbs_button_increment_3, FAV3_DEFAULT))
        binding.plus3.setOnClickListener {
            binding.carbs.value = max(
                0.0, binding.carbs.value
                    + sp.getInt(R.string.key_carbs_button_increment_3, FAV3_DEFAULT)
            )
            validateInputs()
        }

        iobCobCalculator.ads.actualBg()?.let { bgReading ->
            if (bgReading.value < 72)
                binding.hypoTt.isChecked = true
        }
        binding.hypoTt.setOnClickListener {
            binding.activityTt.isChecked = false
            binding.eatingSoonTt.isChecked = false
        }
        binding.activityTt.setOnClickListener {
            binding.hypoTt.isChecked = false
            binding.eatingSoonTt.isChecked = false
        }
        binding.eatingSoonTt.setOnClickListener {
            binding.hypoTt.isChecked = false
            binding.activityTt.isChecked = false
        }
    }

    override fun onDestroyView() {
        super.onDestroyView()
        disposable.clear()
        _binding = null
    }

    private fun toSignedString(value: Int): String {
        return if (value > 0) "+$value" else value.toString()
    }

    override fun submit(): Boolean {
        if (_binding == null) return false
        val carbs = binding.carbs.value?.toInt() ?: return false
        val carbsAfterConstraints = constraintChecker.applyCarbsConstraints(Constraint(carbs)).value()
        val units = profileFunction.getUnits()
        val activityTTDuration = defaultValueHelper.determineActivityTTDuration()
        val activityTT = defaultValueHelper.determineActivityTT()
        val eatingSoonTTDuration = defaultValueHelper.determineEatingSoonTTDuration()
        val eatingSoonTT = defaultValueHelper.determineEatingSoonTT()
        val hypoTTDuration = defaultValueHelper.determineHypoTTDuration()
        val hypoTT = defaultValueHelper.determineHypoTT()
        val actions: LinkedList<String?> = LinkedList()
        val unitLabel = if (units == GlucoseUnit.MMOL) rh.gs(R.string.mmol) else rh.gs(R.string.mgdl)
        val useAlarm = binding.alarmCheckBox.isChecked
        val remindBolus = binding.bolusReminderCheckBox.isChecked

        val activitySelected = binding.activityTt.isChecked
        if (activitySelected)
            actions.add(
                rh.gs(R.string.temptargetshort) + ": " + (DecimalFormatter.to1Decimal(activityTT) + " " + unitLabel + " (" + rh.gs(R.string.format_mins, activityTTDuration) + ")").formatColor(
                    rh,
                    R.color.tempTargetConfirmation
                )
            )
        val eatingSoonSelected = binding.eatingSoonTt.isChecked
        if (eatingSoonSelected)
            actions.add(
                rh.gs(R.string.temptargetshort) + ": " + (DecimalFormatter.to1Decimal(eatingSoonTT) + " " + unitLabel + " (" + rh.gs(
                    R.string.format_mins,
                    eatingSoonTTDuration
                ) + ")").formatColor(rh, R.color.tempTargetConfirmation)
            )
        val hypoSelected = binding.hypoTt.isChecked
        if (hypoSelected)
            actions.add(
                rh.gs(R.string.temptargetshort) + ": " + (DecimalFormatter.to1Decimal(hypoTT) + " " + unitLabel + " (" + rh.gs(R.string.format_mins, hypoTTDuration) + ")").formatColor(
                    rh,
                    R.color.tempTargetConfirmation
                )
            )

        val timeOffset = binding.time.value.toInt()
        eventTime -= eventTime % 1000
        val time = eventTime + timeOffset * 1000 * 60
        if (timeOffset != 0)
            actions.add(rh.gs(R.string.time) + ": " + dateUtil.dateAndTimeString(time))
        if (useAlarm && carbs > 0 && timeOffset > 0)
            actions.add(rh.gs(R.string.alarminxmin, timeOffset).formatColor(rh, R.color.info))
        val duration = binding.duration.value.toInt()
        if (duration > 0)
            actions.add(rh.gs(R.string.duration) + ": " + duration + rh.gs(R.string.shorthour))
        if (carbsAfterConstraints > 0) {
            actions.add(rh.gs(R.string.carbs) + ": " + "<font color='" + rh.gc(R.color.carbs) + "'>" + rh.gs(R.string.format_carbs, carbsAfterConstraints) + "</font>")
            if (carbsAfterConstraints != carbs)
                actions.add("<font color='" + rh.gc(R.color.warning) + "'>" + rh.gs(R.string.carbsconstraintapplied) + "</font>")
        }
        val notes = binding.notesLayout.notes.text.toString()
        if (notes.isNotEmpty())
            actions.add(rh.gs(R.string.notes_label) + ": " + notes)

        if (eventTimeChanged)
            actions.add(rh.gs(R.string.time) + ": " + dateUtil.dateAndTimeString(eventTime))

        if (carbsAfterConstraints > 0 || activitySelected || eatingSoonSelected || hypoSelected) {
            activity?.let { activity ->
                OKDialog.showConfirmation(activity, rh.gs(R.string.carbs), HtmlHelper.fromHtml(Joiner.on("<br/>").join(actions)), {
                    when {
                        activitySelected -> {
                            uel.log(
                                Action.TT, Sources.CarbDialog,
                                ValueWithUnit.TherapyEventTTReason(TemporaryTarget.Reason.ACTIVITY),
                                ValueWithUnit.fromGlucoseUnit(activityTT, units.asText),
                                ValueWithUnit.Minute(activityTTDuration)
                            )
                            disposable += repository.runTransactionForResult(
                                InsertAndCancelCurrentTemporaryTargetTransaction(
                                    timestamp = System.currentTimeMillis(),
                                    duration = TimeUnit.MINUTES.toMillis(activityTTDuration.toLong()),
                                    reason = TemporaryTarget.Reason.ACTIVITY,
                                    lowTarget = Profile.toMgdl(activityTT, profileFunction.getUnits()),
                                    highTarget = Profile.toMgdl(activityTT, profileFunction.getUnits())
                                )
                            ).subscribe({ result ->
                                            result.inserted.forEach { aapsLogger.debug(LTag.DATABASE, "Inserted temp target $it") }
                                            result.updated.forEach { aapsLogger.debug(LTag.DATABASE, "Updated temp target $it") }
                                        }, {
                                            aapsLogger.error(LTag.DATABASE, "Error while saving temporary target", it)
                                        })
                        }

                        eatingSoonSelected -> {
                            uel.log(
                                Action.TT, Sources.CarbDialog,
                                ValueWithUnit.TherapyEventTTReason(TemporaryTarget.Reason.EATING_SOON),
                                ValueWithUnit.fromGlucoseUnit(eatingSoonTT, units.asText),
                                ValueWithUnit.Minute(eatingSoonTTDuration)
                            )
                            disposable += repository.runTransactionForResult(
                                InsertAndCancelCurrentTemporaryTargetTransaction(
                                    timestamp = System.currentTimeMillis(),
                                    duration = TimeUnit.MINUTES.toMillis(eatingSoonTTDuration.toLong()),
                                    reason = TemporaryTarget.Reason.EATING_SOON,
                                    lowTarget = Profile.toMgdl(eatingSoonTT, profileFunction.getUnits()),
                                    highTarget = Profile.toMgdl(eatingSoonTT, profileFunction.getUnits())
                                )
                            ).subscribe({ result ->
                                            result.inserted.forEach { aapsLogger.debug(LTag.DATABASE, "Inserted temp target $it") }
                                            result.updated.forEach { aapsLogger.debug(LTag.DATABASE, "Updated temp target $it") }
                                        }, {
                                            aapsLogger.error(LTag.DATABASE, "Error while saving temporary target", it)
                                        })
                        }

                        hypoSelected -> {
                            uel.log(
                                Action.TT, Sources.CarbDialog,
                                ValueWithUnit.TherapyEventTTReason(TemporaryTarget.Reason.HYPOGLYCEMIA),
                                ValueWithUnit.fromGlucoseUnit(hypoTT, units.asText),
                                ValueWithUnit.Minute(hypoTTDuration)
                            )
                            disposable += repository.runTransactionForResult(
                                InsertAndCancelCurrentTemporaryTargetTransaction(
                                    timestamp = System.currentTimeMillis(),
                                    duration = TimeUnit.MINUTES.toMillis(hypoTTDuration.toLong()),
                                    reason = TemporaryTarget.Reason.HYPOGLYCEMIA,
                                    lowTarget = Profile.toMgdl(hypoTT, profileFunction.getUnits()),
                                    highTarget = Profile.toMgdl(hypoTT, profileFunction.getUnits())
                                )
                            ).subscribe({ result ->
                                            result.inserted.forEach { aapsLogger.debug(LTag.DATABASE, "Inserted temp target $it") }
                                            result.updated.forEach { aapsLogger.debug(LTag.DATABASE, "Updated temp target $it") }
                                        }, {
                                            aapsLogger.error(LTag.DATABASE, "Error while saving temporary target", it)
                                        })
                        }
                    }
                    if (carbsAfterConstraints > 0) {
                        val detailedBolusInfo = DetailedBolusInfo()
                        detailedBolusInfo.eventType = DetailedBolusInfo.EventType.CORRECTION_BOLUS
                        detailedBolusInfo.carbs = carbsAfterConstraints.toDouble()
                        detailedBolusInfo.context = context
                        detailedBolusInfo.notes = notes
                        detailedBolusInfo.carbsDuration = T.hours(duration.toLong()).msecs()
                        detailedBolusInfo.carbsTimestamp = time
                        uel.log(if (duration == 0) Action.CARBS else Action.EXTENDED_CARBS, Sources.CarbDialog,
                                notes,
                                ValueWithUnit.Timestamp(eventTime).takeIf { eventTimeChanged },
                                ValueWithUnit.Gram(carbsAfterConstraints),
                                ValueWithUnit.Minute(timeOffset).takeIf { timeOffset != 0 },
                                ValueWithUnit.Hour(duration).takeIf { duration != 0 })
                        commandQueue.bolus(detailedBolusInfo, object : Callback() {
                            override fun run() {
                                carbTimer.removeEatReminder()
                                if (!result.success) {
                                    ErrorHelperActivity.runAlarm(ctx, result.comment, rh.gs(R.string.treatmentdeliveryerror), R.raw.boluserror)
                                } else if (sp.getBoolean(R.string.key_usebolusreminder, false) && remindBolus)
                                    bolusTimer.scheduleBolusReminder()
                            }
                        })
                    }
                    if (useAlarm && carbs > 0 && timeOffset > 0) {
                        carbTimer.scheduleReminder(dateUtil.now() + T.mins(timeOffset.toLong()).msecs())
                    }
                }, null)
            }
        } else
            activity?.let { activity ->
                OKDialog.show(activity, rh.gs(R.string.carbs), rh.gs(R.string.no_action_selected))
            }
        return true
    }
}