/*
 * Copyright (C) 2025 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.eyedropper.desktop

import android.content.ComponentName
import android.content.ServiceConnection
import android.graphics.Bitmap
import android.os.IBinder
import android.util.Log
import kotlinx.coroutines.Deferred

/**
 * Encapsulates logic to manage connection to [DesktopControllerService] service.
 *
 * This connection is responsible for obtaining the service instance upon connection
 * and triggering the display of the UI overlay. The caller is responsible for
 * calling bindService] with this instance and unbindService once the connection is unneeded.
 *
 * @param onSelectColor Callback invoked when a color is selected in the overlay.
 * @param onAbort Callback invoked if the overlay is dismissed without selection.
 */
class DesktopServiceConnection(
    private val deferredScreenshotsMap: Map<Int, Deferred<Bitmap>>,
    private val onSelectColor: (Int) -> Unit,
    private val onAbort: () -> Unit,
) : ServiceConnection {

    private lateinit var desktopController: DesktopControllerService

    var isBound: Boolean = false

    override fun onServiceConnected(className: ComponentName, service: IBinder) {
        Log.d("DesktopConnection", "onServiceConnected called")
        desktopController = (service as DesktopControllerService.LocalBinder).getService()
        desktopController.displayIdToDeferredScreenshotMap = deferredScreenshotsMap
        desktopController.showUiOverlay(onSelectColor, onAbort)
        isBound = true // Set in here instead of after call b/c async
    }

    override fun onServiceDisconnected(arg0: ComponentName) {
        isBound = false // Also set isBound here to handle unexpected interruptions
    }
}