/*
 * Copyright (C) 2023 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.settings.network

import android.app.settings.SettingsEnums
import android.content.Context
import android.os.Looper
import android.os.UserManager
import android.util.Log
import android.widget.Toast
import androidx.annotation.VisibleForTesting
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.ui.res.stringResource
import com.android.settings.R
import com.android.settings.ResetNetworkRequest
import com.android.settings.Utils
import com.android.settings.overlay.FeatureFactory.Companion.featureFactory
import com.android.settings.spa.preference.ComposePreferenceController
import com.android.settingslib.spa.widget.dialog.AlertDialogButton
import com.android.settingslib.spa.widget.dialog.rememberAlertDialogPresenter
import com.android.settingslib.spa.widget.preference.PreferenceModel
import com.android.settingslib.spaprivileged.model.enterprise.Restrictions
import com.android.settingslib.spaprivileged.template.preference.RestrictedPreference
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext

/**
 * This is to show a preference regarding resetting Bluetooth and Wi-Fi.
 */
class BluetoothWiFiResetPreferenceController(context: Context, preferenceKey: String) :
    ComposePreferenceController(context, preferenceKey) {

    private val restrictionChecker = NetworkResetRestrictionChecker(context)

    override fun getAvailabilityStatus() =
        if (restrictionChecker.hasUserRestriction()) CONDITIONALLY_UNAVAILABLE else AVAILABLE

    @Composable
    override fun Content() {
        val coroutineScope = rememberCoroutineScope()
        val dialogPresenter = rememberAlertDialogPresenter(
            confirmButton = AlertDialogButton(
                text = stringResource(R.string.reset_bluetooth_wifi_button_text),
            ) { reset(coroutineScope) },
            dismissButton = AlertDialogButton(text = stringResource(R.string.cancel)),
            title = stringResource(R.string.reset_bluetooth_wifi_title),
        ) {
            Text(stringResource(R.string.reset_bluetooth_wifi_desc))
        }

        RestrictedPreference(
            model = object : PreferenceModel {
                override val title = stringResource(R.string.reset_bluetooth_wifi_title)
                override val onClick = dialogPresenter::open
            },
            restrictions = Restrictions(keys = listOf(UserManager.DISALLOW_NETWORK_RESET)),
        )
    }

    /**
     * User pressed confirmation button, for starting reset operation.
     */
    private fun reset(coroutineScope: CoroutineScope) {
        // User confirm the reset operation
        featureFactory.metricsFeatureProvider
            .action(mContext, SettingsEnums.RESET_BLUETOOTH_WIFI_CONFIRM, true)

        // Run reset in background thread
        coroutineScope.launch {
            try {
                withContext(Dispatchers.Default) {
                    resetOperation().run()
                }
            } catch (e: Exception) {
                Log.e(TAG, "Exception during reset", e)
                return@launch
            }
            Toast.makeText(
                mContext,
                R.string.reset_bluetooth_wifi_complete_toast,
                Toast.LENGTH_SHORT,
            ).show()
        }
    }

    @VisibleForTesting
    fun resetOperation(): Runnable = if (Utils.isMobileDataCapable(mContext)
                                             || Utils.isVoiceCapable(mContext)) {
        ResetNetworkRequest(
            ResetNetworkRequest.RESET_WIFI_MANAGER or
                ResetNetworkRequest.RESET_WIFI_P2P_MANAGER or
                ResetNetworkRequest.RESET_BLUETOOTH_MANAGER
        )
            .toResetNetworkOperationBuilder(mContext, Looper.getMainLooper())
    } else {  // For device without telephony capabilities
        ResetNetworkRequest(
            ResetNetworkRequest.RESET_CONNECTIVITY_MANAGER or
                ResetNetworkRequest.RESET_VPN_MANAGER or
                ResetNetworkRequest.RESET_WIFI_MANAGER or
                ResetNetworkRequest.RESET_WIFI_P2P_MANAGER or
                ResetNetworkRequest.RESET_BLUETOOTH_MANAGER
        )
            .toResetNetworkOperationBuilder(mContext, Looper.getMainLooper())
            .resetTelephonyAndNetworkPolicyManager(ResetNetworkRequest.ALL_SUBSCRIPTION_ID)
    }.build()

    private companion object {
        private const val TAG = "BluetoothWiFiResetPref"
    }
}