/*
 * 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.systemui.keyguard.ui.binder

import android.view.View
import android.view.accessibility.AccessibilityNodeInfo
import androidx.core.view.accessibility.AccessibilityNodeInfoCompat
import androidx.lifecycle.Lifecycle
import androidx.lifecycle.repeatOnLifecycle
import com.android.app.tracing.coroutines.launchTraced as launch
import com.android.systemui.common.ui.view.TouchHandlingView
import com.android.systemui.deviceentry.ui.view.UdfpsAccessibilityOverlayOverlappingTouchHandlingView
import com.android.systemui.keyguard.ui.viewmodel.KeyguardTouchHandlingViewModel
import com.android.systemui.lifecycle.WindowLifecycleState
import com.android.systemui.lifecycle.repeatWhenAttached
import com.android.systemui.lifecycle.setSnapshotBinding
import com.android.systemui.lifecycle.viewModel
import com.android.systemui.plugins.FalsingManager
import com.android.systemui.res.R
import kotlinx.coroutines.awaitCancellation
import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.launch

object KeyguardTouchViewBinder {
    /**
     * Drives UI for the lock screen long-press feature.
     *
     * @param view The view that listens for long-presses.
     * @param viewModel The view-model that models the UI state.
     * @param onSingleTap A callback to invoke when the system decides that there was a single tap.
     * @param falsingManager [FalsingManager] for making sure the long-press didn't just happen in
     *   the user's pocket.
     */
    @JvmStatic
    fun bind(
        view: UdfpsAccessibilityOverlayOverlappingTouchHandlingView,
        viewModelFactory: KeyguardTouchHandlingViewModel.Factory,
        onSingleTap: (x: Int, y: Int) -> Unit,
        falsingManager: FalsingManager,
    ) {
        view.accessibilityHintLongPressAction =
            AccessibilityNodeInfo.AccessibilityAction(
                AccessibilityNodeInfoCompat.ACTION_LONG_CLICK,
                view.resources.getString(R.string.lock_screen_settings),
            )

        view.repeatWhenAttached {
            val isLongPressHandlingEnabled = MutableStateFlow(false)

            repeatOnLifecycle(Lifecycle.State.STARTED) {
                launch("$TAG#viewModel.isLongPressHandlingEnabled") {
                    isLongPressHandlingEnabled.collect { isEnabled ->
                        view.contentDescription =
                            if (isEnabled) {
                                view.resources.getString(R.string.accessibility_desc_lock_screen)
                            } else {
                                null
                            }
                    }
                }

                view.viewModel(
                    traceName = "KeyguardTouchViewBinderViewModel",
                    minWindowLifecycleState = WindowLifecycleState.ATTACHED,
                    factory = { viewModelFactory.create() },
                ) { viewModel ->
                    view.setSnapshotBinding {
                        view.setLongPressHandlingEnabled(viewModel.isLongPressHandlingEnabled)
                        view.setDoublePressHandlingEnabled(viewModel.isDoubleTapHandlingEnabled)

                        isLongPressHandlingEnabled.value = viewModel.isLongPressHandlingEnabled
                    }

                    view.listener =
                        object : TouchHandlingView.Listener {
                            override fun onLongPressDetected(
                                view: View,
                                x: Int,
                                y: Int,
                                isA11yAction: Boolean,
                            ) {
                                if (
                                    !isA11yAction &&
                                        falsingManager.isFalseLongTap(FalsingManager.LOW_PENALTY)
                                ) {
                                    return
                                }

                                viewModel.onLongPress(isA11yAction)
                            }

                            override fun onSingleTapDetected(view: View, x: Int, y: Int) {
                                if (falsingManager.isFalseTap(FalsingManager.LOW_PENALTY)) {
                                    return
                                }

                                onSingleTap(x, y)
                            }

                            override fun onDoubleTapDetected(view: View) {
                                if (falsingManager.isFalseDoubleTap()) {
                                    return
                                }

                                viewModel.onDoubleClick()
                            }
                        }

                    launch {
                        viewModel.accessibilityOverlayBoundsWhenListeningForUdfps.collect { bounds
                            ->
                            view.setOverlappingAccessibilityViewBounds(bounds)
                        }
                    }

                    awaitCancellation()
                }
            }
        }
    }

    private const val TAG = "KeyguardTouchViewBinder"
}