/*
 * Copyright (c) 2026 QPQ IaaS AG <info@qpq.swiss>. All rights reserved.
 * Project: Gajumaru Core Java Libraries <gajumaru.io>
 *
 * This program is dual-licensed:
 * 1) Under the GNU Affero General Public License as published by the Free
 *    Software Foundation, either version 3 of the License, or (at your option)
 *    any later version (AGPL-3.0-or-later).
 *
 * 2) Under a commercial/proprietary license available directly from QPQ IaaS AG.
 *    If you wish to use this software outside the strict constraints of the
 *    AGPLv3 (e.g. within a closed-source or proprietary product), you must
 *    purchase a commercial license from QPQ IaaS AG.
 *
 * Authors:
 *   - Craig Everett <craigeverett@qpq.swiss>
 *
 * SPDX-License-Identifier: AGPL-3.0-or-later OR LicenseRef-QPQ-Commercial
 */

package swiss.qpq.gajumobile.ui.screens

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.safeDrawingPadding
import androidx.compose.foundation.layout.width
import androidx.compose.material3.AssistChip
import androidx.compose.material3.AssistChipDefaults
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import swiss.qpq.gajumobile.R
import swiss.qpq.gajumobile.ui.components.GajuButton
import swiss.qpq.gajumobile.ui.components.GajuHeader
import swiss.qpq.gajumobile.ui.components.GajuTextField

@Composable
fun CreateWalletScreen(
    onWalletCreated: (name: String, networkId: String) -> Unit,
    onBack: (() -> Unit)? = null,
) {
    var walletName by remember { mutableStateOf("") }
    var selectedNetwork by remember { mutableStateOf("groot.mainnet") }
    
    Column(
        modifier = Modifier
            .fillMaxSize()
            .background(MaterialTheme.colorScheme.background)
            .padding(24.dp)
            .safeDrawingPadding(),
        horizontalAlignment = Alignment.CenterHorizontally
    ) {
        GajuHeader()
        Spacer(modifier = Modifier.height(32.dp))
        Text(
            stringResource(R.string.create_wallet_title), 
            style = MaterialTheme.typography.headlineMedium,
            color = MaterialTheme.colorScheme.onBackground
        )
        Spacer(modifier = Modifier.height(16.dp))
        Text(
            stringResource(R.string.create_wallet_description),
            style = MaterialTheme.typography.bodyMedium,
            textAlign = TextAlign.Center,
            color = MaterialTheme.colorScheme.onSurfaceVariant
        )
        Spacer(modifier = Modifier.height(32.dp))
        
        GajuTextField(
            value = walletName,
            onValueChange = { walletName = it },
            label = stringResource(R.string.wallet_name_label),
            placeholder = stringResource(R.string.wallet_name_placeholder),
            singleLine = true
        )

        Spacer(modifier = Modifier.height(24.dp))

        Text(
            stringResource(R.string.network_label),
            style = MaterialTheme.typography.labelMedium,
            color = MaterialTheme.colorScheme.onBackground,
            modifier = Modifier.align(Alignment.Start)
        )

        Row(
            modifier = Modifier.fillMaxWidth().padding(vertical = 12.dp),
            horizontalArrangement = Arrangement.spacedBy(16.dp)
        ) {
            listOf(
                "groot.mainnet" to stringResource(R.string.network_mainnet),
                "groot.testnet" to stringResource(R.string.network_testnet)
            ).forEach { (id, label) ->
                val isSelected = selectedNetwork == id
                AssistChip(
                    onClick = { selectedNetwork = id },
                    label = { Text(label) },
                    colors = AssistChipDefaults.assistChipColors(
                        containerColor = if (isSelected) MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.surfaceVariant,
                        labelColor = if (isSelected) MaterialTheme.colorScheme.onPrimary else MaterialTheme.colorScheme.onSurfaceVariant
                    )
                )
            }
        }

        Spacer(modifier = Modifier.weight(1f))
        
        Row(modifier = Modifier.fillMaxWidth()) {
            if (onBack != null) {
                GajuButton(
                    text = stringResource(R.string.back_button),
                    onClick = onBack,
                    modifier = Modifier.weight(1f),
                    containerColor = MaterialTheme.colorScheme.secondary,
                    contentColor = MaterialTheme.colorScheme.onSecondary
                )
                Spacer(modifier = Modifier.width(16.dp))
            }
            GajuButton(
                text = stringResource(R.string.continue_button),
                enabled = walletName.isNotBlank(),
                onClick = { onWalletCreated(walletName, selectedNetwork) },
                modifier = Modifier.weight(1f)
            )
        }
    }
}
