/*
 * 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.wifi

import android.annotation.StyleRes
import android.content.Context
import android.content.DialogInterface
import android.os.Bundle
import android.view.View
import android.view.WindowManager
import android.widget.Button
import android.widget.ImageButton
import android.widget.TextView
import androidx.annotation.OpenForTesting
import androidx.appcompat.app.AlertDialog
import com.android.settings.R
import com.android.settings.wifi.utils.WifiDialogHelper
import com.android.settingslib.RestrictedLockUtils
import com.android.settingslib.RestrictedLockUtilsInternal
import com.android.wifitrackerlib.WifiEntry

/**
 * Dialog for users to edit a Wi-Fi network.
 */
@OpenForTesting
open class WifiDialog2 @JvmOverloads constructor(
    context: Context,
    private val listener: WifiDialog2Listener,
    val wifiEntry: WifiEntry?,
    private val mode: Int,
    @StyleRes style: Int = 0,
    private val hideSubmitButton: Boolean = mode == WifiConfigUiBase2.MODE_VIEW,
    private val hideMeteredAndPrivacy: Boolean = false,
    private val isSysUiCaller: Boolean = false,
) : AlertDialog(context, style), WifiConfigUiBase2, DialogInterface.OnClickListener {
    /**
     * Host UI component of WifiDialog2 can receive callbacks by this interface.
     */
    interface WifiDialog2Listener {
        /**
         * To forget the Wi-Fi network.
         */
        fun onForget(dialog: WifiDialog2) {}

        /**
         * To save the Wi-Fi network.
         */
        fun onSubmit(dialog: WifiDialog2) {}

        /**
         * To trigger Wi-Fi QR code scanner.
         */
        fun onScan(dialog: WifiDialog2, ssid: String) {}
    }

    private lateinit var view: View
    private lateinit var controller: WifiConfigController2
    private lateinit var dialogHelper: WifiDialogHelper

    override fun getController(): WifiConfigController2 = controller

    override fun onCreate(savedInstanceState: Bundle?) {
        if (isSysUiCaller) {
            setWindowsOverlay()
        }
        view = layoutInflater.inflate(R.layout.wifi_dialog, null)
        setView(view)
        controller = WifiConfigController2(this, view, wifiEntry, mode, hideMeteredAndPrivacy)
        super.onCreate(savedInstanceState)
        if (hideSubmitButton) {
            controller.hideSubmitButton()
        } else {
            // During creation, the submit button can be unavailable to determine visibility.
            // Right after creation, update button visibility
            controller.enableSubmitIfAppropriate()
        }
        if (wifiEntry == null) {
            controller.hideForgetButton()
        }
        dialogHelper = WifiDialogHelper(this, this, controller.validator)
    }

    private fun setWindowsOverlay() {
        window?.apply {
            val lp = attributes
            setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG)
            attributes = lp
        }
    }

    override fun onStart() {
        super.onStart()
        val ssidScannerButton = requireViewById<ImageButton>(R.id.ssid_scanner_button)
        if (hideSubmitButton) {
            ssidScannerButton.visibility = View.GONE
        } else {
            ssidScannerButton.setOnClickListener {
                val ssidEditText = requireViewById<TextView>(R.id.ssid)
                val ssid = ssidEditText.text.toString()
                listener.onScan(this, ssid)
            }
        }
    }

    override fun onRestoreInstanceState(savedInstanceState: Bundle) {
        super.onRestoreInstanceState(savedInstanceState)
        controller.updatePassword()
    }

    override fun dispatchSubmit() {
        listener.onSubmit(this)
        dismiss()
    }

    override fun onClick(dialogInterface: DialogInterface, id: Int) {
        when (id) {
            BUTTON_SUBMIT -> listener.onSubmit(this)
            BUTTON_FORGET -> {
                if (WifiUtils.isNetworkLockedDown(context, wifiEntry!!.wifiConfiguration)) {
                    RestrictedLockUtils.sendShowAdminSupportDetailsIntent(
                        context,
                        RestrictedLockUtilsInternal.getDeviceOwner(context)
                    )
                    return
                }
                listener.onForget(this)
            }
        }
    }

    override fun getMode(): Int = mode

    override fun getSubmitButton(): Button? = getButton(BUTTON_SUBMIT)

    override fun getForgetButton(): Button? = getButton(BUTTON_FORGET)

    override fun getCancelButton(): Button? = getButton(BUTTON_NEGATIVE)

    override fun setSubmitButton(text: CharSequence) {
        setButton(BUTTON_SUBMIT, text, this)
    }

    override fun setForgetButton(text: CharSequence) {
        setButton(BUTTON_FORGET, text, this)
    }

    override fun setCancelButton(text: CharSequence) {
        setButton(BUTTON_NEGATIVE, text, this)
    }

    companion object {
        private const val BUTTON_SUBMIT = BUTTON_POSITIVE
        private const val BUTTON_FORGET = BUTTON_NEUTRAL
    }
}