PaymentSuccessFragment.kt

/*
 * This file is part of GNU Taler
 * (C) 2020 Taler Systems S.A.
 *
 * GNU Taler is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 3, or (at your option) any later version.
 *
 * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */

package net.taler.merchantpos.payment

import android.os.Bundle
import android.view.LayoutInflater
import android.view.ViewGroup

import androidx.compose.foundation.Image
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.BoxWithConstraints
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.material3.Button
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.ColorFilter
import androidx.compose.ui.platform.ComposeView
import androidx.compose.ui.platform.ViewCompositionStrategy
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import androidx.fragment.app.Fragment

import net.taler.merchantpos.MainActivity
import net.taler.merchantpos.R
import net.taler.merchantpos.compose.PosTheme

class PaymentSuccessFragment : Fragment()
{
    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?,
    ) = ComposeView(requireContext()).apply {
        setViewCompositionStrategy(ViewCompositionStrategy.DisposeOnViewTreeLifecycleDestroyed)
        setContent {
            PaymentSuccessScreen(
                onContinue = {
                    (requireActivity() as MainActivity).returnToOrderEntry()
                },
            )
        }
    }
}

@Composable
private fun PaymentSuccessScreen(onContinue: () -> Unit)
{
    PosTheme {
        BoxWithConstraints(
            modifier = Modifier.fillMaxSize(),
        ) {
            val verticalPadding = (maxHeight * 0.045f).coerceIn(16.dp, 32.dp)
            val heroSpacing = (maxHeight * 0.035f).coerceIn(12.dp, 24.dp)
            val iconSize = (maxHeight * 0.22f).coerceIn(84.dp, 164.dp)
            val buttonMinHeight = (maxHeight * 0.11f).coerceIn(52.dp, 72.dp)
            val buttonWidthFraction = if (maxWidth < 600.dp) 0.78f else 0.6f
            val titleStyle =
                when
                {
                    maxHeight < 560.dp -> MaterialTheme.typography.titleMedium
                    maxHeight < 720.dp -> MaterialTheme.typography.titleLarge
                    else -> MaterialTheme.typography.headlineMedium
                }

            Column(
                modifier =
                    Modifier
                        .fillMaxSize()
                        .padding(vertical = verticalPadding, horizontal = 24.dp),
                horizontalAlignment = Alignment.CenterHorizontally,
                verticalArrangement = Arrangement.SpaceBetween,
            ) {
                Box(
                    modifier =
                        Modifier
                            .fillMaxWidth()
                            .weight(1f),
                    contentAlignment = Alignment.Center,
                ) {
                    Column(
                        horizontalAlignment = Alignment.CenterHorizontally,
                        verticalArrangement = Arrangement.spacedBy(heroSpacing),
                    ) {
                        Image(
                            painter = painterResource(R.drawable.ic_check_circle),
                            contentDescription = null,
                            modifier = Modifier.size(iconSize),
                            colorFilter = ColorFilter.tint(MaterialTheme.colorScheme.primary),
                        )
                        Text(
                            text = stringResource(R.string.payment_received),
                            modifier = Modifier.fillMaxWidth(),
                            style = titleStyle,
                            fontWeight = FontWeight.SemiBold,
                            color = MaterialTheme.colorScheme.primary,
                            textAlign = TextAlign.Center,
                        )
                    }
                }
                Button(
                    onClick = onContinue,
                    modifier =
                        Modifier
                            .fillMaxWidth(buttonWidthFraction)
                            .heightIn(min = buttonMinHeight),
                ) {
                    Text(
                        text = stringResource(R.string.payment_back_button),
                        fontWeight = FontWeight.SemiBold,
                    )
                }
            }
        }
    }
}

@Composable
internal fun PaymentSuccessScreenContent()
{
    PaymentSuccessScreen(onContinue = {})
}