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package ch.bfh.habej2.wallee_c2ec.withdrawal
import android.app.Activity
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.Column
import androidx.compose.material3.Button
import androidx.compose.material3.Text
import androidx.compose.material3.TextField
import androidx.compose.runtime.Composable
import androidx.compose.runtime.collectAsState
import androidx.compose.runtime.getValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.platform.LocalContext
import androidx.navigation.compose.NavHost
import androidx.navigation.compose.composable
import androidx.navigation.compose.rememberNavController
import ch.bfh.habej2.wallee_c2ec.client.taler.config.TalerBankIntegrationConfig
import ch.bfh.habej2.wallee_c2ec.client.wallee.WalleeResponseHandler
import com.wallee.android.till.sdk.ApiClient
import com.wallee.android.till.sdk.data.LineItem
import com.wallee.android.till.sdk.data.Transaction
import com.wallee.android.till.sdk.data.TransactionProcessingBehavior
import java.math.BigDecimal
import java.util.Currency
import java.util.Optional
class WithdrawalActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
val model = WithdrawalViewModel()
val navController = rememberNavController()
NavHost(navController = navController, startDestination = "chooseExchangeScreen") {
composable("chooseExchangeScreen") {
ExchangeSelectionScreen(model) {
navController.navigate("registerWithdrawalScreen")
}
}
composable("registerWithdrawalScreen") {
RegisterWithdrawalScreen(model) {
navController.navigate("paymentScreen")
}
}
composable("paymentScreen") { PaymentScreen(model) }
}
}
}
}
@Composable
fun RegisterWithdrawalScreen(
model: WithdrawalViewModel,
navigateToWhenRegistered: () -> Unit
) {
val uiState by model.uiState.collectAsState()
val activity = (LocalContext.current as Activity)
model.startAuthorizationWhenReadyOrAbort(navigateToWhenRegistered) {
activity.finish()
}
Column(
horizontalAlignment = Alignment.CenterHorizontally
) {
Text(text = "QR-Code content: ${formatTalerUri(uiState.encodedWopid)}")
QRCode(formatTalerUri(uiState.encodedWopid))
Button(onClick = {
model.withdrawalOperationFailed()
activity.finish()
}) {
Text(text = "abort")
}
}
}
@Composable
fun PaymentScreen(model: WithdrawalViewModel) {
val activity = LocalContext.current as Activity
Column(
horizontalAlignment = Alignment.CenterHorizontally
) {
Text(text = "present card, trigger payment")
TextField(
value = "",
onValueChange = {
val optAmount = parseAmount(it)
if (optAmount.isPresent) {
model.updateAmount(optAmount.get())
}
},
label = { Text(text = "Enter amount") },
placeholder = { Text(text = "amount") }
)
AuthorizePaymentButton(model = model)
Button(onClick = {
model.withdrawalOperationFailed()
activity.finish()
}) {
Text(text = "abort")
}
}
}
@Composable
fun AuthorizePaymentButton(model: WithdrawalViewModel) {
val uiState by model.uiState.collectAsState()
val activity = LocalContext.current as Activity
val client = ApiClient(WalleeResponseHandler())
client.bind(activity)
Button(enabled = false, onClick = {
val withdrawalAmount = LineItem
.ListBuilder(
uiState.encodedWopid,
BigDecimal("${uiState.amount.value}.${uiState.amount.frac}")
)
.build()
val transaction = Transaction.Builder(withdrawalAmount)
.setCurrency(Currency.getInstance(uiState.currency))
.setInvoiceReference(uiState.encodedWopid)
.setMerchantReference(uiState.encodedWopid)
.setTransactionProcessingBehavior(TransactionProcessingBehavior.COMPLETE_IMMEDIATELY)
.build()
try {
client.authorizeTransaction(transaction)
} catch (e: Exception) {
e.printStackTrace()
}
}) {
Text(text = "")
}
}
@Composable
fun ExchangeSelectionScreen(
model: WithdrawalViewModel,
onNavigateToWithdrawal: () -> Unit
) {
val activity = LocalContext.current as Activity
Column(
horizontalAlignment = Alignment.CenterHorizontally
) {
Text(text = "Choose the exchange to withdraw from")
// TODO let user select exchanges from config here
// config must contain display name, credentials (generated by cli)
// and the base url of the c2ec bank-integration api
val ctx = LocalContext.current
Button(onClick = {
// TODO trigger model.exchangeUpdated(...)
model.exchangeUpdated(TalerBankIntegrationConfig("","","",""))
onNavigateToWithdrawal()
}) {
Text(text = "withdraw")
}
Button(onClick = { activity.finish() }) {
Text(text = "abort")
}
}
}
@Composable
fun SummaryScreen(model: WithdrawalViewModel) {
val activity = LocalContext.current as Activity
Column(
horizontalAlignment = Alignment.CenterHorizontally
) {
Text(text = "Transaction Executed")
Button(onClick = { activity.finish() }) {
Text(text = "finish")
}
}
}
/**
* Format expected X[.X], X an integer
*/
private fun parseAmount(inp: String): Optional<Amount> {
val points = inp.count { it == '.' }
if (points > 1) {
return Optional.empty()
}
if (points == 1) {
val valueStr = inp.split(".")[0]
val fracStr = inp.split(".")[1]
return try {
val value = valueStr.toInt()
val frac = fracStr.toInt()
Optional.of(Amount(value, frac))
} catch (ex: NumberFormatException) {
Optional.empty()
}
}
return try {
val value = inp.toInt()
Optional.of(Amount(value, 0))
} catch (ex: NumberFormatException) {
Optional.empty()
}
}
private fun formatTalerUri(encodedWopid: String) = "taler://withdraw/$encodedWopid"
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