/*
 * 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.statusbar.notification.stack

import android.animation.AnimatorListenerAdapter
import android.content.Context
import android.content.res.Configuration
import android.graphics.Canvas
import android.graphics.Path
import android.graphics.RectF
import android.util.AttributeSet
import android.util.Log
import com.android.systemui.Flags
import com.android.systemui.res.R
import com.android.systemui.statusbar.notification.row.ExpandableView

/** Root view to insert Lock screen media controls into the notification stack. */
class MediaContainerView(context: Context, attrs: AttributeSet?) : ExpandableView(context, attrs) {

    override var clipHeight = 0
    var cornerRadius = 0f
    var clipRect = RectF()
    var clipPath = Path()

    init {
        setWillNotDraw(false) // Run onDraw after invalidate.
        updateResources()
    }

    override fun onConfigurationChanged(newConfig: Configuration?) {
        super.onConfigurationChanged(newConfig)
        updateResources()
    }

    private fun updateResources() {
        cornerRadius =
            context.resources.getDimensionPixelSize(R.dimen.notification_corner_radius).toFloat()
    }

    public override fun updateClipping() {
        if (clipHeight != actualHeight) {
            clipHeight = actualHeight
        }
        invalidate()
    }

    override fun onDraw(canvas: Canvas) {
        super.onDraw(canvas)

        val bounds = canvas.clipBounds
        bounds.bottom = clipHeight
        clipRect.set(bounds)

        clipPath.reset()
        clipPath.addRoundRect(clipRect, cornerRadius, cornerRadius, Path.Direction.CW)
        canvas.clipPath(clipPath)
    }

    override fun performRemoveAnimation(
            duration: Long,
            delay: Long,
            translationDirection: Float,
            isHeadsUpAnimation: Boolean,
            onStartedRunnable: Runnable?,
            onFinishedRunnable: Runnable?,
            animationListener: AnimatorListenerAdapter?,
            clipSide: ClipSide
    ): Long {
        return 0
    }

    override fun performAddAnimation(
        delay: Long,
        duration: Long,
        isHeadsUpAppear: Boolean,
        onEnd: Runnable?
    ) {
        // No animation, it doesn't need it, this would be local
    }

    override fun setVisibility(visibility: Int) {
        if (Flags.bindKeyguardMediaVisibility()) {
            if (isVisibilityValid(visibility)) {
                super.setVisibility(visibility)
            }
        } else {
            super.setVisibility(visibility)
        }

        assertMediaContainerVisibility(visibility)
    }

    /**
     * visibility should be aligned with MediaContainerView visibility on the keyguard.
     */
    private fun isVisibilityValid(visibility: Int): Boolean {
        val currentViewState = viewState as? MediaContainerViewState ?: return true
        val shouldBeGone = !currentViewState.shouldBeVisible
        return if (shouldBeGone) visibility == GONE else visibility != GONE
    }

    /**
     * b/298213983
     * MediaContainerView's visibility is changed to VISIBLE when it should be GONE.
     * This method check this state and logs.
     */
    private fun assertMediaContainerVisibility(visibility: Int) {
        val currentViewState = viewState

        if (currentViewState is MediaContainerViewState) {
            if (!currentViewState.shouldBeVisible && visibility == VISIBLE) {
                Log.wtf("MediaContainerView", "MediaContainerView should be GONE " +
                        "but its visibility changed to VISIBLE")
            }
        }
    }

    fun setKeyguardVisibility(isVisible: Boolean) {
        val currentViewState = viewState
        if (currentViewState is MediaContainerViewState) {
            currentViewState.shouldBeVisible = isVisible
        }

        visibility = if (isVisible) VISIBLE else GONE
    }

    override fun createExpandableViewState(): ExpandableViewState = MediaContainerViewState()

    class MediaContainerViewState : ExpandableViewState() {
        var shouldBeVisible: Boolean = false

        override fun copyFrom(viewState: ViewState) {
            super.copyFrom(viewState)
            if (viewState is MediaContainerViewState) {
                shouldBeVisible = viewState.shouldBeVisible
            }
        }
    }
}