package info.nightscout.androidaps.receivers

import android.content.Context
import android.content.Intent
import com.google.gson.Gson
import dagger.android.DaggerBroadcastReceiver
import info.nightscout.androidaps.interfaces.ActivePluginProvider
import info.nightscout.androidaps.interfaces.PumpInterface
import info.nightscout.androidaps.logging.AAPSLogger
import info.nightscout.androidaps.logging.LTag
import info.nightscout.androidaps.utils.TimeChangeType
import java.util.*
import javax.inject.Inject

class TimeDateOrTZChangeReceiver : DaggerBroadcastReceiver() {
    @Inject lateinit var aapsLogger: AAPSLogger
    @Inject lateinit var activePlugin: ActivePluginProvider
    var gson: Gson

    private var isDST = false

    init {
        isDST = calculateDST()
        gson = Gson()
    }

    private fun calculateDST(): Boolean {
        val timeZone = TimeZone.getDefault()
        val nowDate = Date()
        return if (timeZone.useDaylightTime()) {
            timeZone.inDaylightTime(nowDate)
        } else {
            false
        }
    }

    override fun onReceive(context: Context, intent: Intent) {
        super.onReceive(context, intent)
        val action = intent.action
        val activePump: PumpInterface = activePlugin.activePump
        if (activePump == null) {
            aapsLogger.debug(LTag.PUMP,"TimeDateOrTZChangeReceiver::Time and/or TimeZone changed. [action={}]. Pump is null, exiting.", action)
            return
        }

        aapsLogger.debug(LTag.PUMP,"TimeDateOrTZChangeReceiver::Date, Time and/or TimeZone changed. [action={}]", action)
        aapsLogger.debug(LTag.PUMP,"TimeDateOrTZChangeReceiver::Intent::{}", gson.toJson(intent))

        if (action == null) {
            aapsLogger.error(LTag.PUMP,"TimeDateOrTZChangeReceiver::Action is null. Exiting.")
        } else if (Intent.ACTION_TIMEZONE_CHANGED == action) {
            aapsLogger.info(LTag.PUMP,"TimeDateOrTZChangeReceiver::Timezone changed. Notifying pump driver.")
            activePump.timezoneOrDSTChanged(TimeChangeType.TimezoneChange)
        } else if (Intent.ACTION_TIME_CHANGED == action) {
            val currentDst = calculateDST()
            if (currentDst == isDST) {
                aapsLogger.info(LTag.PUMP,"TimeDateOrTZChangeReceiver::Time changed (manual). Notifying pump driver.")
                activePump.timezoneOrDSTChanged(TimeChangeType.ManualTimeChange)
            } else {
                if (currentDst) {
                    aapsLogger.info(LTag.PUMP,"TimeDateOrTZChangeReceiver::DST started. Notifying pump driver.")
                    activePump.timezoneOrDSTChanged(TimeChangeType.DST_Started)
                } else {
                    aapsLogger.info(LTag.PUMP,"TimeDateOrTZChangeReceiver::DST ended. Notifying pump driver.")
                    activePump.timezoneOrDSTChanged(TimeChangeType.DST_Ended)
                }
            }
            isDST = currentDst
        } else {
            aapsLogger.error(LTag.PUMP,"TimeDateOrTZChangeReceiver::Unknown action received [name={}]. Exiting.", action)
        }
    }


}