/*
 * ImageToolbox is an image editor for android
 * Copyright (c) 2026 T8RIN (Malik Mukhametzyanov)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 *
 * 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.
 *
 * You should have received a copy of the Apache License
 * along with this program.  If not, see <http://www.apache.org/licenses/LICENSE-2.0>.
 */

package com.t8rin.imagetoolbox.core.ui.widget.modifier

import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.drawWithCache
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Paint
import androidx.compose.ui.graphics.drawscope.drawIntoCanvas
import androidx.compose.ui.graphics.nativePaint
import androidx.compose.ui.graphics.toArgb
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp

fun Modifier.advancedShadow(
    color: Color = Color.Black,
    alpha: Float = 1f,
    cornersRadius: Dp = 0.dp,
    shadowBlurRadius: Dp = 0.dp,
    offsetY: Dp = 0.dp,
    offsetX: Dp = 0.dp
) = drawWithCache {
    val shadowColor = color.copy(alpha = alpha).toArgb()
    val transparentColor = color.copy(alpha = 0f).toArgb()
    val cornersRadiusPx = cornersRadius.toPx()
    val shadowBlurRadiusPx = shadowBlurRadius.toPx()
    val offsetXPx = offsetX.toPx()
    val offsetYPx = offsetY.toPx()
    val paint = Paint().apply {
        nativePaint.color = transparentColor
        nativePaint.setShadowLayer(
            shadowBlurRadiusPx,
            offsetXPx,
            offsetYPx,
            shadowColor
        )
    }

    onDrawBehind {
        drawIntoCanvas {
            it.drawRoundRect(
                0f,
                0f,
                size.width,
                size.height,
                cornersRadiusPx,
                cornersRadiusPx,
                paint
            )
        }
    }
}