/*
 * This file is part of GNU Taler
 * (C) 2022 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.wallet.transactions

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.verticalScroll
import androidx.compose.material.MaterialTheme
import androidx.compose.material.Surface
import androidx.compose.material.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment.Companion.CenterHorizontally
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.ComposeView
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import net.taler.common.Amount
import net.taler.common.Timestamp
import net.taler.common.toAbsoluteTime
import net.taler.wallet.R
import net.taler.wallet.compose.TalerSurface

class TransactionTipFragment : TransactionDetailFragment() {

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?,
    ): View = ComposeView(requireContext()).apply {
        setContent {
            TalerSurface {
                val t = transaction as? TransactionTip ?: error("No or wrong transaction")
                TransactionTipComposable(t) {
                    onDeleteButtonClicked(t)
                }
            }
        }
    }
}

@Composable
fun TransactionTipComposable(t: TransactionTip, onDelete: () -> Unit) {
    val scrollState = rememberScrollState()
    Column(
        modifier = Modifier
            .fillMaxWidth()
            .verticalScroll(scrollState),
        horizontalAlignment = CenterHorizontally,
    ) {
        val context = LocalContext.current
        Text(
            modifier = Modifier.padding(16.dp),
            text = t.timestamp.ms.toAbsoluteTime(context).toString(),
            style = MaterialTheme.typography.body1,
        )

        TransactionAmountComposable(
            label = stringResource(id = R.string.send_peer_payment_amount_received),
            amount = t.amountEffective,
            amountType = AmountType.Positive,
        )
        TransactionAmountComposable(
            label = stringResource(id = R.string.send_peer_payment_amount_sent),
            amount = t.amountRaw,
            amountType = AmountType.Neutral,
        )
        val fee = t.amountRaw - t.amountEffective
        if (!fee.isZero()) {
            TransactionAmountComposable(
                label = stringResource(id = R.string.withdraw_fees),
                amount = fee,
                amountType = AmountType.Negative,
            )
        }
        TransactionInfoComposable(
            label = stringResource(id = R.string.tip_merchant_url),
            info = t.merchantBaseUrl,
        )
        DeleteTransactionComposable(onDelete)
    }
}

@Preview
@Composable
fun TransactionTipPreview() {
    val t = TransactionTip(
        transactionId = "transactionId",
        timestamp = Timestamp.fromMillis(System.currentTimeMillis() - 360 * 60 * 1000),
        pending = true,
        merchantBaseUrl = "https://merchant.example.org/",
        amountRaw = Amount.fromDouble("TESTKUDOS", 42.23),
        amountEffective = Amount.fromDouble("TESTKUDOS", 42.1337),
    )
    Surface {
        TransactionTipComposable(t) {}
    }
}