/*
 *  * Copyright (c)  2021  Shabinder Singh
 *  * This program is free software: you can redistribute it and/or modify
 *  * it under the terms of the GNU General Public License as published by
 *  * the Free Software Foundation, either version 3 of the License, or
 *  * (at your option) 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 General Public License for more details.
 *  *
 *  *  You should have received a copy of the GNU General Public License
 *  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package com.shabinder.spotiflyer

import android.annotation.SuppressLint
import android.content.*
import android.content.pm.PackageManager
import android.media.MediaScannerConnection
import android.net.Uri
import android.os.Build
import android.os.Bundle
import android.os.IBinder
import android.os.PowerManager
import android.util.Log
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.animation.ExperimentalAnimationApi
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.material.MaterialTheme
import androidx.compose.material.Surface
import androidx.compose.runtime.*
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalView
import androidx.core.content.ContextCompat
import androidx.core.view.WindowCompat
import androidx.lifecycle.lifecycleScope
import com.arkivanov.decompose.ComponentContext
import com.arkivanov.decompose.defaultComponentContext
import com.arkivanov.mvikotlin.logging.store.LoggingStoreFactory
import com.arkivanov.mvikotlin.main.store.DefaultStoreFactory
import com.codekidlabs.storagechooser.R
import com.codekidlabs.storagechooser.StorageChooser
import com.google.accompanist.insets.ProvideWindowInsets
import com.google.accompanist.insets.navigationBarsPadding
import com.google.accompanist.insets.statusBarsHeight
import com.google.accompanist.insets.statusBarsPadding
import com.shabinder.common.core_components.ConnectionLiveData
import com.shabinder.common.core_components.analytics.AnalyticsManager
import com.shabinder.common.core_components.file_manager.FileManager
import com.shabinder.common.core_components.preference_manager.PreferenceManager
import com.shabinder.common.di.observeAsState
import com.shabinder.common.models.*
import com.shabinder.common.models.PlatformActions.Companion.SharedPreferencesKey
import com.shabinder.common.providers.FetchPlatformQueryResult
import com.shabinder.common.root.SpotiFlyerRoot
import com.shabinder.common.root.callbacks.SpotiFlyerRootCallBacks
import com.shabinder.common.translations.Strings
import com.shabinder.common.uikit.configurations.SpotiFlyerTheme
import com.shabinder.common.uikit.configurations.colorOffWhite
import com.shabinder.common.uikit.screens.SpotiFlyerRootContent
import com.shabinder.spotiflyer.service.ForegroundService
import com.shabinder.spotiflyer.ui.AnalyticsDialog
import com.shabinder.spotiflyer.ui.NetworkDialog
import com.shabinder.spotiflyer.ui.PermissionDialog
import com.shabinder.spotiflyer.utils.*
import kotlinx.coroutines.delay
import kotlinx.coroutines.flow.MutableSharedFlow
import kotlinx.coroutines.flow.conflate
import kotlinx.coroutines.flow.emitAll
import kotlinx.coroutines.launch
import org.koin.android.ext.android.inject
import org.koin.core.parameter.parametersOf
import java.io.File

@ExperimentalAnimationApi
class MainActivity : ComponentActivity() {

    private lateinit var root: SpotiFlyerRoot
    private val fetcher: FetchPlatformQueryResult by inject()
    private val fileManager: FileManager by inject()
    private val preferenceManager: PreferenceManager by inject()
    private val analyticsManager: AnalyticsManager by inject { parametersOf(this) }
    private val callBacks: SpotiFlyerRootCallBacks get() = root.callBacks
    private val trackStatusFlow = MutableSharedFlow<HashMap<String, DownloadStatus>>(1)
    private var permissionGranted = mutableStateOf(true)
    private val internetAvailability by lazy { ConnectionLiveData(applicationContext) }
    private lateinit var rootComponent: SpotiFlyerRoot
    // private val visibleChild get(): SpotiFlyerRoot.Child = root.routerState.value.activeChild.instance

    // Variable for storing instance of our service class
    var foregroundService: ForegroundService? = null

    // Boolean to check if our activity is bound to service or not
    var isServiceBound: Boolean? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        preferenceManager.analyticsManager = analyticsManager
        // This app draws behind the system bars, so we want to handle fitting system windows
        WindowCompat.setDecorFitsSystemWindows(window, false)
        rootComponent = spotiFlyerRoot(defaultComponentContext())
        setContent {
            SpotiFlyerTheme {
                Surface(contentColor = colorOffWhite) {
                    ProvideWindowInsets {
                        permissionGranted = remember { mutableStateOf(true) }
                        val view = LocalView.current

                        Box {
                            root = SpotiFlyerRootContent(
                                rootComponent,
                                Modifier.statusBarsPadding().navigationBarsPadding()
                            )
                            Spacer(
                                Modifier
                                    .statusBarsHeight()
                                    .fillMaxWidth()
                                    .background(MaterialTheme.colors.background.copy(alpha = 0.65f))
                            )
                        }

                        NetworkDialog(isInternetAvailableState())

                        PermissionDialog(
                            permissionGranted.value,
                            { requestStoragePermission() },
                            { disableDozeMode(disableDozeCode) },
                        )

                        var askForAnalyticsPermission by remember { mutableStateOf(false) }
                        AnalyticsDialog(
                            askForAnalyticsPermission,
                            enableAnalytics = {
                                preferenceManager.toggleAnalytics(true)
                                preferenceManager.firstLaunchDone()
                            },
                            dismissDialog = {
                                askForAnalyticsPermission = false
                                preferenceManager.firstLaunchDone()
                            }
                        )

                        LaunchedEffect(view) {
                            permissionGranted.value = checkPermissions()
                            if (preferenceManager.isFirstLaunch) {
                                delay(2500)
                                // Ask For Analytics Permission on first Dialog
                                askForAnalyticsPermission = true
                            }
                        }
                    }
                }
            }
        }
        initialise()
    }

    private fun initialise() {
        val isGithubRelease = checkAppSignature(this)
        /*
        * Only Send an `Update Notification` on Github Release Builds
        * and Track Downloads for all other releases like F-Droid,
        * for `Github Downloads` we will track Downloads using : https://tooomm.github.io/github-release-stats/?username=Shabinder&repository=SpotiFlyer
        * */
        if (isGithubRelease) {
            checkIfLatestVersion()
        }
        // TODO Track Download Event
        handleIntentFromExternalActivity()

        initForegroundService()
    }

    /*START: Foreground Service Handlers*/
    private fun initForegroundService() {
        // Start and then Bind to the Service
        ContextCompat.startForegroundService(
            this@MainActivity,
            Intent(this, ForegroundService::class.java)
        )
        bindService()
    }

    /**
     * Interface for getting the instance of binder from our service class
     * So client can get instance of our service class and can directly communicate with it.
     */
    private val serviceConnection = object : ServiceConnection {
        val tag = "Service Connection"

        override fun onServiceConnected(className: ComponentName, iBinder: IBinder) {
            Log.d(tag, "connected to service.")
            // We've bound to MyService, cast the IBinder and get MyBinder instance
            val binder = iBinder as ForegroundService.DownloadServiceBinder
            foregroundService = binder.service
            isServiceBound = true
            lifecycleScope.launch {
                foregroundService?.trackStatusFlowMap?.statusFlow?.let {
                    trackStatusFlow.emitAll(it.conflate())
                }
            }
        }

        override fun onServiceDisconnected(arg0: ComponentName) {
            Log.d(tag, "disconnected from service.")
            isServiceBound = false
        }
    }

    /*Used to bind to our service class*/
    private fun bindService() {
        Intent(this, ForegroundService::class.java).also { intent ->
            bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE)
        }
    }

    /*Used to unbind from our service class*/
    private fun unbindService() {
        Intent(this, ForegroundService::class.java).also {
            unbindService(serviceConnection)
        }
    }
    /*END: Foreground Service Handlers*/

    @Composable
    private fun isInternetAvailableState(): State<Boolean?> {
        return internetAvailability.observeAsState()
    }

    private fun showPopUpMessage(string: String, long: Boolean = false) {
        android.widget.Toast.makeText(
            applicationContext,
            string,
            if (long) android.widget.Toast.LENGTH_LONG else android.widget.Toast.LENGTH_SHORT
        ).show()
    }

    @Suppress("DEPRECATION")
    override fun onRequestPermissionsResult(
        requestCode: Int,
        permissions: Array<out String>,
        grantResults: IntArray
    ) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        permissionGranted.value = checkPermissions()
    }

    private fun spotiFlyerRoot(componentContext: ComponentContext): SpotiFlyerRoot =
        SpotiFlyerRoot(
            componentContext,
            dependencies = object : SpotiFlyerRoot.Dependencies {
                override val storeFactory = LoggingStoreFactory(DefaultStoreFactory)
                override val database = this@MainActivity.fileManager.db
                override val fetchQuery = this@MainActivity.fetcher
                override val fileManager: FileManager = this@MainActivity.fileManager
                override val preferenceManager = this@MainActivity.preferenceManager
                override val analyticsManager: AnalyticsManager = this@MainActivity.analyticsManager
                override val downloadProgressFlow: MutableSharedFlow<HashMap<String, DownloadStatus>> =
                    trackStatusFlow
                override val actions = object : Actions {

                    override val platformActions = object : PlatformActions {
                        override val imageCacheDir: String =
                            applicationContext.cacheDir.absolutePath + File.separator
                        override val sharedPreferences = applicationContext.getSharedPreferences(
                            SharedPreferencesKey,
                            MODE_PRIVATE
                        )

                        override fun addToLibrary(path: String) {
                            MediaScannerConnection.scanFile(
                                applicationContext,
                                listOf(path).toTypedArray(), null, null
                            )
                        }

                        override fun sendTracksToService(array: List<TrackDetails>) {
                            for (chunk in array.chunked(25)) {
                                if (foregroundService == null) initForegroundService()
                                foregroundService?.downloadAllTracks(array)
                            }
                        }
                    }

                    override fun showPopUpMessage(string: String, long: Boolean) =
                        this@MainActivity.showPopUpMessage(string, long)

                    override fun setDownloadDirectoryAction(callBack: (String) -> Unit) =
                        setUpOnPrefClickListener(callBack)

                    override fun queryActiveTracks() = this@MainActivity.queryActiveTracks()

                    override fun giveDonation() {
                        openPlatform(
                            "",
                            platformLink = "https://razorpay.com/payment-button/pl_GnKuuDBdBu0ank/view/?utm_source=payment_button&utm_medium=button&utm_campaign=payment_button"
                        )
                    }

                    override fun shareApp() {
                        val sendIntent: Intent = Intent().apply {
                            action = Intent.ACTION_SEND
                            putExtra(Intent.EXTRA_TEXT, Strings.shareMessage())
                            type = "text/plain"
                        }

                        val shareIntent = Intent.createChooser(sendIntent, null)
                        startActivity(shareIntent)
                    }

                    override fun copyToClipboard(text: String) {
                        val clipboard = getSystemService(CLIPBOARD_SERVICE) as ClipboardManager
                        val clip = ClipData.newPlainText("SpotiFlyer Selection", text)
                        clipboard.setPrimaryClip(clip)

                        showPopUpMessage("Text Copied to Clipboard.")
                    }

                    override fun openPlatform(packageID: String, platformLink: String) {
                        val manager: PackageManager = applicationContext.packageManager
                        try {
                            val intent = manager.getLaunchIntentForPackage(packageID)
                                ?: throw PackageManager.NameNotFoundException()
                            intent.addCategory(Intent.CATEGORY_LAUNCHER)
                            startActivity(intent)
                        } catch (e: PackageManager.NameNotFoundException) {
                            val uri: Uri =
                                Uri.parse(platformLink)
                            val intent = Intent(Intent.ACTION_VIEW, uri)
                            startActivity(intent)
                        }
                    }

                    override fun writeMp3Tags(trackDetails: TrackDetails) {
                        /*IMPLEMENTED*/
                    }

                    override val isInternetAvailable get() = internetAvailability.value ?: true
                }
            }
        )

    private fun queryActiveTracks() {
        lifecycleScope.launch {
            foregroundService?.trackStatusFlowMap?.let { tracksStatus ->
                trackStatusFlow.emit(tracksStatus)
            }
        }
    }

    override fun onResume() {
        super.onResume()
        queryActiveTracks()
    }

    @Suppress("DEPRECATION")
    private fun setUpOnPrefClickListener(callBack: (String) -> Unit) {
        // Initialize Builder
        val chooser = StorageChooser.Builder()
            .withActivity(this)
            .withFragmentManager(fragmentManager)
            .withMemoryBar(true)
            .setTheme(
                StorageChooser.Theme(applicationContext).apply {
                    scheme = applicationContext.resources.getIntArray(R.array.default_dark)
                }
            )
            .setDialogTitle(Strings.setDownloadDirectory())
            .allowCustomPath(true)
            .setType(StorageChooser.DIRECTORY_CHOOSER)
            .build()

        // get path that the user has chosen
        chooser.setOnSelectListener { path ->
            Log.d("Setting Base Path", path)
            val f = File(path)
            if (f.canWrite()) {
                // hell yeah :)
                preferenceManager.setDownloadDirectory(path)
                callBack(path)
                showPopUpMessage(Strings.downloadDirectorySetTo("\n${fileManager.defaultDir()}"))
            } else {
                showPopUpMessage(Strings.noWriteAccess("\n$path "))
            }
        }

        // Show dialog whenever you want by
        chooser.show()
    }

    @Suppress("DEPRECATION")
    @SuppressLint("ObsoleteSdkInt")
    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (requestCode == disableDozeCode) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                val pm =
                    getSystemService(Context.POWER_SERVICE) as PowerManager
                val isIgnoringBatteryOptimizations =
                    pm.isIgnoringBatteryOptimizations(packageName)
                if (isIgnoringBatteryOptimizations) {
                    // Ignoring battery optimization
                    permissionGranted.value = true
                } else {
                    disableDozeMode(disableDozeCode) // Again Ask For Permission!!
                }
            }
        }
    }

    override fun onNewIntent(intent: Intent?) {
        super.onNewIntent(intent)
        handleIntentFromExternalActivity(intent)
    }

    private fun handleIntentFromExternalActivity(intent: Intent? = getIntent()) {
        if (intent?.action == Intent.ACTION_SEND) {
            if ("text/plain" == intent.type) {
                intent.getStringExtra(Intent.EXTRA_TEXT)?.let {
                    val filterLinkRegex = """http.+\w""".toRegex()
                    val string = it.replace("\n".toRegex(), " ")
                    val link = filterLinkRegex.find(string)?.value.toString()
                    Log.i("Intent", link)
                    lifecycleScope.launch {
                        while (!this@MainActivity::root.isInitialized) {
                            delay(100)
                        }
                        if (methods.value.isInternetAvailable) callBacks.searchLink(link)
                    }
                }
            }
        }
    }

    override fun onDestroy() {
        super.onDestroy()
        unbindService()
    }

    override fun onStart() {
        super.onStart()
        analyticsManager.onStart()
    }

    override fun onStop() {
        super.onStop()
        analyticsManager.onStop()
    }

    companion object {
        const val disableDozeCode = 1223
    }
}