package com.geeksville.mesh.model

import android.content.Context
import android.content.SharedPreferences
import android.net.Uri
import android.os.Bundle
import android.os.RemoteException
import androidx.compose.mutableStateOf
import androidx.core.content.edit
import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.ViewModel
import com.geeksville.android.BuildUtils.isEmulator
import com.geeksville.android.Logging
import com.geeksville.mesh.IMeshService
import com.geeksville.mesh.MeshProtos
import com.geeksville.mesh.service.MeshService
import com.geeksville.mesh.ui.getInitials

class UIViewModel : ViewModel(), Logging {
    init {
        debug("ViewModel created")
    }

    companion object {
        /**
         * Return the current channel info
         * FIXME, we should sim channels at the MeshService level if we are running on an emulator,
         * for now I just fake it by returning a canned channel.
         */
        fun getChannel(c: MeshProtos.RadioConfig?): Channel? {
            val channel = c?.channelSettings?.let { Channel(it) }

            return if (channel == null && isEmulator)
                Channel.emulated
            else
                channel
        }

        fun getPreferences(context: Context): SharedPreferences =
            context.getSharedPreferences("ui-prefs", Context.MODE_PRIVATE)
    }

    override fun onCleared() {
        super.onCleared()
        debug("ViewModel cleared")
    }

    var meshService: IMeshService? = null

    /// Are we connected to our radio device
    val isConnected = MutableLiveData(MeshService.ConnectionState.DISCONNECTED)

    /// various radio settings (including the channel)
    val radioConfig = MutableLiveData<MeshProtos.RadioConfig?>(null)

    /// Set the radio config (also updates our saved copy in preferences)
    fun setRadioConfig(context: Context, c: MeshProtos.RadioConfig) {
        debug("Setting new radio config!")
        meshService?.radioConfig = c.toByteArray()
        radioConfig.value = c

        getPreferences(context).edit(commit = true) {
            this.putString("channel-url", UIState.getChannel()!!.getChannelUrl().toString())
        }
    }
}

/// FIXME - figure out how to merge this staate with the AppStatus Model
object UIState : Logging {

    /// Kinda ugly - created in the activity but used from Compose - figure out if there is a cleaner way GIXME
    // lateinit var googleSignInClient: GoogleSignInClient

    var meshService: IMeshService? = null

    /// Are we connected to our radio device
    val isConnected = mutableStateOf(MeshService.ConnectionState.DISCONNECTED)

    /// various radio settings (including the channel)
    private val radioConfig = mutableStateOf<MeshProtos.RadioConfig?>(null)

    /// our name in hte radio
    /// Note, we generate owner initials automatically for now
    /// our activity will read this from prefs or set it to the empty string
    var ownerName: String = "MrInIDE Ownername"

    /// If the app was launched because we received a new channel intent, the Url will be here
    var requestedChannelUrl: Uri? = null

    var savedInstanceState: Bundle? = null

    /**
     * Return the current channel info
     * FIXME, we should sim channels at the MeshService level if we are running on an emulator,
     * for now I just fake it by returning a canned channel.
     */
    fun getChannel(): Channel? {
        val channel = radioConfig.value?.channelSettings?.let { Channel(it) }

        return if (channel == null && isEmulator)
            Channel.emulated
        else
            channel
    }

    fun getPreferences(context: Context): SharedPreferences =
        context.getSharedPreferences("ui-prefs", Context.MODE_PRIVATE)

    /// Set the radio config (also updates our saved copy in preferences)
    fun setRadioConfig(context: Context, c: MeshProtos.RadioConfig) {
        radioConfig.value = c

        getPreferences(context).edit(commit = true) {
            this.putString("channel-url", getChannel()!!.getChannelUrl().toString())
        }
    }

    // clean up all this nasty owner state management FIXME
    fun setOwner(context: Context, s: String? = null) {

        if (s != null) {
            ownerName = s

            // note: we allow an empty userstring to be written to prefs
            getPreferences(context).edit(commit = true) {
                putString("owner", s)
            }
        }

        // Note: we are careful to not set a new unique ID
        if (ownerName.isNotEmpty())
            try {
                meshService?.setOwner(
                    null,
                    ownerName,
                    getInitials(ownerName)
                ) // Note: we use ?. here because we might be running in the emulator
            } catch (ex: RemoteException) {
                errormsg("Can't set username on device, is device offline? ${ex.message}")
            }
    }
}