/*
 * Copyright (C) 2025 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.eyedropper.ui.touchscreen

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material3.Button
import androidx.compose.material3.ButtonDefaults.buttonColors
import androidx.compose.material3.Text
import androidx.compose.material3.TextButton
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.res.colorResource
import androidx.compose.ui.res.dimensionResource
import androidx.compose.ui.res.integerResource
import androidx.compose.ui.res.stringResource
import com.android.eyedropper.R

/**
 * Subcomponent of [TouchscreenMainScreen] which manages the Apply (select color) / cancel buttons.
 *
 * "Apply" selects the centered pixel beneath the reticle and calls `onSelectClicked`.
 * "Cancel" aborts EyeDropper and calls `onCancelClicked`.
 */
@Composable
fun ControlBar(
    isLandscape: Boolean,
    onSelectClicked: () -> Unit,
    onCancelClicked: () -> Unit,
) {
    val buttonPadding = Modifier.padding(
        top = dimensionResource(R.dimen.button_group_vertical_padding_top),
        bottom = dimensionResource(R.dimen.button_group_vertical_padding_bottom),
        end = dimensionResource(R.dimen.color_picker_buttons_padding_end)
    )
    val buttonsAlignment = if (isLandscape) Alignment.BottomEnd else Alignment.BottomCenter

    Box(
        modifier = Modifier
            .fillMaxSize()
            .background(Color.White),
        contentAlignment = buttonsAlignment
    ) {
        Row(
            modifier = Modifier
                .fillMaxSize()
                .then(buttonPadding),
            horizontalArrangement = Arrangement.End,
            verticalAlignment = Alignment.Bottom,
        ) {
            // Text with no background fill -> Secondary action
            TextButton(
                onClick = onCancelClicked,
                shape = RoundedCornerShape(
                    integerResource(
                        R.integer.apply_cancel_button_rounded_corner_percent
                    )
                ),
                modifier = Modifier.padding(
                    end = dimensionResource(R.dimen.color_picker_cancel_button_padding_end)
                )
            ) {
                Text(
                    text = stringResource(R.string.color_picker_cancel_button_text),
                    color = colorResource(R.color.google_blue500)
                )
            }
            // Primary action
            Button(
                onClick = onSelectClicked,
                shape = RoundedCornerShape(
                    integerResource(R.integer.apply_cancel_button_rounded_corner_percent)
                ),
                colors = buttonColors(containerColor = colorResource(R.color.google_blue500))
            ) {
                Text(
                    text = stringResource(R.string.color_picker_apply_button_text),
                    color = Color.White
                )
            }
        }
    }
}