/*
 * 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.withdraw.manual

import android.net.Uri
import androidx.compose.foundation.BorderStroke
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.wrapContentWidth
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.verticalScroll
import androidx.compose.material.Button
import androidx.compose.material.ButtonDefaults
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.MaterialTheme
import androidx.compose.material.Surface
import androidx.compose.material.Text
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.ContentCopy
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Alignment.Companion.CenterVertically
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.res.colorResource
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.em
import net.taler.common.Amount
import net.taler.wallet.R
import net.taler.wallet.compose.copyToClipBoard
import net.taler.wallet.withdraw.WithdrawStatus

@Composable
fun ScreenBitcoin(
    status: WithdrawStatus.ManualTransferRequiredBitcoin,
    bankAppClick: (() -> Unit)?,
    onCancelClick: (() -> Unit)?,
) {
    val scrollState = rememberScrollState()
    Column(modifier = Modifier
        .padding(all = 16.dp)
        .wrapContentWidth(Alignment.CenterHorizontally)
        .verticalScroll(scrollState)
    ) {
        Text(
            text = stringResource(R.string.withdraw_manual_ready_title),
            style = MaterialTheme.typography.h5,
        )
        Text(
            text = stringResource(R.string.withdraw_manual_ready_intro,
                status.amountRaw.toString()),
            style = MaterialTheme.typography.body1,
            modifier = Modifier
                .padding(vertical = 8.dp)
        )
        Text(
            text = stringResource(R.string.withdraw_manual_bitcoin_ready_details_intro),
            style = MaterialTheme.typography.body1,
            modifier = Modifier
                .padding(vertical = 8.dp)
        )
        Text(
            text = stringResource(R.string.withdraw_manual_bitcoin_ready_details_segwit),
            style = MaterialTheme.typography.body1,
            modifier = Modifier
                .padding(vertical = 8.dp)
        )
        DetailRow(stringResource(R.string.withdraw_manual_ready_subject), status.subject)
        Text(
            text = stringResource(R.string.withdraw_manual_bitcoin_ready_details_bitcoincore),
            style = MaterialTheme.typography.body1,
            modifier = Modifier
                .padding(vertical = 8.dp)
        )
        BitcoinSegwitAddrs(
            status.amountRaw,
            status.account,
            status.segwitAddrs
        )
        Text(
            text = stringResource(R.string.withdraw_manual_bitcoin_ready_details_confirm,
                status.amountRaw.withCurrency(Amount.SEGWIT_MIN.currency) + Amount.SEGWIT_MIN + Amount.SEGWIT_MIN),
            style = MaterialTheme.typography.body1,
            modifier = Modifier
                .padding(vertical = 8.dp)
        )
        Text(
            text = stringResource(R.string.withdraw_manual_ready_warning),
            style = MaterialTheme.typography.body2,
            color = colorResource(R.color.notice_text),
            modifier = Modifier
                .align(Alignment.CenterHorizontally)
                .padding(all = 8.dp)
                .background(colorResource(R.color.notice_background))
                .border(BorderStroke(2.dp, colorResource(R.color.notice_border)))
                .padding(all = 16.dp)
        )
        if (bankAppClick != null) {
            Button(
                onClick = bankAppClick,
                modifier = Modifier
                    .padding(vertical = 16.dp)
                    .align(Alignment.CenterHorizontally),
            ) {
                Text(text = stringResource(R.string.withdraw_manual_ready_bank_button))
            }
        }
        if (onCancelClick != null) {
            Button(
                onClick = onCancelClick,
                colors = ButtonDefaults.buttonColors(backgroundColor = colorResource(R.color.red)),
                modifier = Modifier
                    .padding(vertical = 16.dp)
                    .align(Alignment.End),
            ) {
                Text(text = stringResource(R.string.withdraw_manual_ready_cancel))
            }
        }
    }
}

@Composable
fun BitcoinSegwitAddrs(amount: Amount, addr: String, segwitAddresses: List<String>) {
    val context = LocalContext.current

    val sr = segwitAddresses.joinToString(separator = "\n") { s ->
        """
$s ${Amount.SEGWIT_MIN}
    """.trimIndent()
    }
    val copyText = """
$addr ${amount.withCurrency("BTC")}
$sr
    """.trimIndent()

    Column {
        Row(modifier = Modifier.padding(vertical = 8.dp)) {
            Column(modifier = Modifier.weight(0.3f)) {
                Text(
                    text = addr,
                    style = MaterialTheme.typography.body1,
                    fontWeight = FontWeight.Normal,
                    fontSize = 3.em
                )
                Text(
                    text = amount.withCurrency("BTC").toString(),
                    style = MaterialTheme.typography.body1,
                    fontWeight = FontWeight.Bold,
                )
            }
        }
        for (segwitAddress in segwitAddresses) {
            Row(modifier = Modifier.padding(vertical = 8.dp)) {
                Column(modifier = Modifier.weight(0.3f)) {
                    Text(
                        text = segwitAddress,
                        style = MaterialTheme.typography.body1,
                        fontWeight = FontWeight.Normal,
                        fontSize = 3.em
                    )
                    Text(
                        text = Amount.SEGWIT_MIN.toString(),
                        style = MaterialTheme.typography.body1,
                        fontWeight = FontWeight.Bold,
                    )
                }
            }
        }

        IconButton(
            onClick = { copyToClipBoard(context, "Bitcoin", copyText) },
        ) {
            Row(verticalAlignment = CenterVertically) {
                Icon(Icons.Default.ContentCopy, stringResource(R.string.copy))
                Text(
                    modifier = Modifier.padding(start = 8.dp),
                    text = stringResource(R.string.copy),
                    style = MaterialTheme.typography.body1,
                )
            }
        }
    }

}

@Preview
@Composable
fun PreviewScreenBitcoin() {
    Surface {
        ScreenBitcoin(WithdrawStatus.ManualTransferRequiredBitcoin(
            exchangeBaseUrl = "bitcoin.ice.bfh.ch",
            uri = Uri.parse("https://taler.net"),
            account = "bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4",
            segwitAddrs = listOf(
                "bc1qqleages8702xvg9qcyu02yclst24xurdrynvxq",
                "bc1qsleagehks96u7jmqrzcf0fw80ea5g57qm3m84c"
            ),
            subject = "0ZSX8SH0M30KHX8K3Y1DAMVGDQV82XEF9DG1HC4QMQ3QWYT4AF00",
            amountRaw = Amount("BITCOINBTC", 0, 14000000),
            transactionId = "",
        ), {}) {}
    }
}