/*
 * Copyright 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 androidx.compose.material3

import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.requiredWidth
import androidx.compose.foundation.layout.wrapContentHeight
import androidx.compose.material3.tokens.DatePickerModalTokens
import androidx.compose.material3.tokens.DialogTokens
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import androidx.compose.ui.window.DialogProperties

/**
 * <a href="https://m3.material.io/components/date-pickers/overview" class="external" target="_blank">Material Design date picker dialog</a>.
 *
 * A dialog for displaying a [DatePicker]. Date pickers let people select a date.
 *
 * A sample for displaying a [DatePicker] in a dialog:
 * @sample androidx.compose.material3.samples.DatePickerDialogSample
 *
 * @param onDismissRequest called when the user tries to dismiss the Dialog by clicking outside
 * or pressing the back button. This is not called when the dismiss button is clicked.
 * @param confirmButton button which is meant to confirm a proposed action, thus resolving what
 * triggered the dialog. The dialog does not set up any events for this button, nor does it control
 * its enablement, so those need to be set up by the caller.
 * @param modifier the [Modifier] to be applied to this dialog's content.
 * @param dismissButton button which is meant to dismiss the dialog. The dialog does not set up any
 * events for this button so they need to be set up by the caller.
 * @param shape defines the dialog's surface shape as well its shadow
 * @param tonalElevation when [DatePickerColors.containerColor] is [ColorScheme.surface], a higher
 * the elevation will result in a darker color in light theme and lighter color in dark theme
 * @param colors [DatePickerColors] that will be used to resolve the colors used for this date
 * picker in different states. See [DatePickerDefaults.colors].
 * @param properties typically platform specific properties to further configure the dialog
 * @param content the content of the dialog (i.e. a [DatePicker], for example)
 */
@ExperimentalMaterial3Api
@Composable
fun DatePickerDialog(
    onDismissRequest: () -> Unit,
    confirmButton: @Composable () -> Unit,
    modifier: Modifier = Modifier,
    dismissButton: @Composable (() -> Unit)? = null,
    shape: Shape = DatePickerDefaults.shape,
    tonalElevation: Dp = DatePickerDefaults.TonalElevation,
    colors: DatePickerColors = DatePickerDefaults.colors(),
    properties: DialogProperties = DialogProperties(usePlatformDefaultWidth = false),
    content: @Composable ColumnScope.() -> Unit
) {
    AlertDialog(
        onDismissRequest = onDismissRequest,
        modifier = modifier.wrapContentHeight(),
        properties = properties
    ) {
        Surface(
            modifier = Modifier
                .requiredWidth(DatePickerModalTokens.ContainerWidth)
                .heightIn(max = DatePickerModalTokens.ContainerHeight),
            shape = shape,
            color = colors.containerColor,
            tonalElevation = tonalElevation,
        ) {
            Column(verticalArrangement = Arrangement.SpaceBetween) {
                content()
                // Buttons
                Box(
                    modifier = Modifier
                        .align(Alignment.End)
                        .padding(DialogButtonsPadding)
                ) {
                    CompositionLocalProvider(
                        LocalContentColor provides DialogTokens.ActionLabelTextColor.value
                    ) {
                        val textStyle =
                            MaterialTheme.typography.fromToken(DialogTokens.ActionLabelTextFont)
                        ProvideTextStyle(value = textStyle) {
                            AlertDialogFlowRow(
                                mainAxisSpacing = DialogButtonsMainAxisSpacing,
                                crossAxisSpacing = DialogButtonsCrossAxisSpacing
                            ) {
                                dismissButton?.invoke()
                                confirmButton()
                            }
                        }
                    }
                }
            }
        }
    }
}

private val DialogButtonsPadding = PaddingValues(bottom = 8.dp, end = 6.dp)
private val DialogButtonsMainAxisSpacing = 8.dp
private val DialogButtonsCrossAxisSpacing = 12.dp