/*
 * Copyright (C) 2022 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.systemui.screenshot

import android.content.Intent
import android.os.IBinder
import android.os.RemoteException
import android.util.Log
import androidx.lifecycle.LifecycleService
import androidx.lifecycle.lifecycleScope
import com.android.app.tracing.coroutines.launch
import com.android.systemui.dagger.qualifiers.Main
import com.android.systemui.plugins.ActivityStarter
import com.android.systemui.shade.ShadeExpansionStateManager
import javax.inject.Inject
import kotlinx.coroutines.CoroutineDispatcher
import kotlinx.coroutines.withContext

/** Provides state from the main SystemUI process on behalf of the Screenshot process. */
class ScreenshotProxyService
@Inject
constructor(
    private val mExpansionMgr: ShadeExpansionStateManager,
    @Main private val mMainDispatcher: CoroutineDispatcher,
    private val activityStarter: ActivityStarter,
) : LifecycleService() {

    private val mBinder: IBinder =
        object : IScreenshotProxy.Stub() {
            /** @return true when the notification shade is partially or fully expanded. */
            override fun isNotificationShadeExpanded(): Boolean {
                val expanded = !mExpansionMgr.isClosed()
                Log.d(TAG, "isNotificationShadeExpanded(): $expanded")
                return expanded
            }

            override fun dismissKeyguard(callback: IOnDoneCallback) {
                lifecycleScope.launch("IScreenshotProxy#dismissKeyguard") {
                    executeAfterDismissing(callback)
                }
            }
        }

    private suspend fun executeAfterDismissing(callback: IOnDoneCallback) =
        withContext(mMainDispatcher) {
            activityStarter.executeRunnableDismissingKeyguard(
                {
                    try {
                        callback.onDone(true)
                    } catch (e: RemoteException) {
                        Log.w(TAG, "Failed to complete callback transaction", e)
                    }
                },
                null,
                true /* dismissShade */,
                true /* afterKeyguardGone */,
                true /* deferred */
            )
        }

    override fun onBind(intent: Intent): IBinder? {
        Log.d(TAG, "onBind: $intent")
        return mBinder
    }

    companion object {
        const val TAG = "ScreenshotProxyService"
    }
}