Able to set Default card for payments now

app/src/main/java/sh/sar/basedbank/ui/home/DashboardFragment.kt

@@ -25,6 +25,7 @@ import sh.sar.basedbank.api.models.BankAccount
 import sh.sar.basedbank.api.mib.MibCard
 import sh.sar.basedbank.api.mib.MibFinanceDeal
 import sh.sar.basedbank.util.bmlapi.BmlCardParser
+import sh.sar.basedbank.util.CredentialStore
 import kotlin.math.abs
 import sh.sar.basedbank.databinding.FragmentDashboardBinding
 import sh.sar.basedbank.databinding.ItemForeignLimitBinding
@@ -101,8 +102,13 @@ class DashboardFragment : Fragment() {
                 .filter { (it.profileType == "BML_PREPAID" || it.profileType == "BML_CREDIT" || it.profileType == "BML_DEBIT") && it.statusDesc.equals("Active", ignoreCase = true) }
                 .map { CardItem.Bml(it) }
             val all = mibItems + bmlItems
-            cardAdapter.update(all)
+            val defaultNum = CredentialStore(requireContext()).getDefaultCardAccountNumber()
-            binding.sectionCards.visibility = if (all.isNotEmpty()) View.VISIBLE else View.GONE
+            val ordered = if (defaultNum != null) {
+                val def = all.filterIsInstance<CardItem.Bml>().firstOrNull { it.account.accountNumber == defaultNum }
+                if (def != null) listOf(def) + all.filter { it !== def } else all
+            } else all
+            cardAdapter.update(ordered)
+            binding.sectionCards.visibility = if (ordered.isNotEmpty()) View.VISIBLE else View.GONE
         }
         viewModel.mibCards.observe(viewLifecycleOwner) { updateCardList() }
         viewModel.accounts.observe(viewLifecycleOwner) { updateCardList() }

app/src/main/java/sh/sar/basedbank/ui/home/PayWithCardFragment.kt

@@ -29,6 +29,7 @@ import sh.sar.basedbank.R
 import sh.sar.basedbank.api.mib.MibCard
 import sh.sar.basedbank.databinding.FragmentCardsBinding
 import sh.sar.basedbank.util.CardsCache
+import sh.sar.basedbank.util.CredentialStore
 import sh.sar.basedbank.util.bmlapi.BmlCardParser
 import kotlin.math.abs
 
@@ -53,6 +54,9 @@ class CardsFragment : Fragment() {
     private var swipeDragStartRawY = 0f
     private var swipeIsDragging = false
 
+    private lateinit var stackAdapter: CardStackAdapter
+    private val store by lazy { CredentialStore(requireContext()) }
+
     private val qrLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
         if (result.resultCode != Activity.RESULT_OK) return@registerForActivityResult
         val raw = result.data?.getStringExtra(QrScannerActivity.EXTRA_QR_CONTENT) ?: return@registerForActivityResult
@@ -77,7 +81,7 @@ class CardsFragment : Fragment() {
         val peekPx = screenW / 8
         cardWidth = screenW - 2 * peekPx
 
-        val stackAdapter = CardStackAdapter(cardWidth)
+        stackAdapter = CardStackAdapter(cardWidth)
         binding.rvCards.layoutManager = LinearLayoutManager(requireContext(), LinearLayoutManager.HORIZONTAL, false)
         binding.rvCards.adapter = stackAdapter
         binding.rvCards.setPadding(peekPx, 0, peekPx, 0)
@@ -114,24 +118,8 @@ ViewCompat.setOnApplyWindowInsetsListener(binding.contentLayout) { v, insets ->
             insets
         }
 
-        val updateCardList = {
+        viewModel.mibCards.observe(viewLifecycleOwner) { rebuildCards() }
-            val mibItems = (viewModel.mibCards.value ?: emptyList()).map { CardItem.Mib(it) }
+        viewModel.accounts.observe(viewLifecycleOwner) { rebuildCards() }
-            val bmlItems = (viewModel.accounts.value ?: emptyList())
-                .filter { it.profileType == "BML_PREPAID" || it.profileType == "BML_CREDIT" || it.profileType == "BML_DEBIT" }
-                .map { CardItem.Bml(it) }
-            cards = mibItems + bmlItems
-            stackAdapter.update(cards)
-            binding.loadingView.visibility = View.GONE
-            val empty = cards.isEmpty()
-            binding.emptyView.visibility = if (empty) View.VISIBLE else View.GONE
-            binding.contentLayout.visibility = if (empty) View.GONE else View.VISIBLE
-            if (!empty) {
-                buildDots(cards.size, currentCardPosition)
-                updateCardInfo(currentCardPosition)
-            }
-        }
-        viewModel.mibCards.observe(viewLifecycleOwner) { updateCardList() }
-        viewModel.accounts.observe(viewLifecycleOwner) { updateCardList() }
 
         val cached = CardsCache.load(requireContext())
         if (cached.isNotEmpty()) {
@@ -264,8 +252,27 @@ ViewCompat.setOnApplyWindowInsetsListener(binding.contentLayout) { v, insets ->
         binding.pageIndicator.visibility = View.GONE
         binding.llPayButtons.visibility = View.GONE
         binding.llManageButtons.visibility = View.VISIBLE
+        binding.llDefaultCardRow.visibility = View.VISIBLE
         binding.manageCardView.root.visibility = View.VISIBLE
 
+        // Set switch state (clear listener first to avoid triggering on programmatic set)
+        val isBml = item is CardItem.Bml
+        binding.switchDefaultCard.setOnCheckedChangeListener(null)
+        binding.switchDefaultCard.isChecked = isBml && store.getDefaultCardAccountNumber() == (item as? CardItem.Bml)?.account?.accountNumber
+        binding.switchDefaultCard.setOnCheckedChangeListener { _, isChecked ->
+            if (item is CardItem.Mib) {
+                // MIB doesn't support NFC/QR pay — same toast as scan/tap to pay
+                binding.switchDefaultCard.setOnCheckedChangeListener(null)
+                binding.switchDefaultCard.isChecked = false
+                binding.switchDefaultCard.setOnCheckedChangeListener { _, c ->
+                    handleDefaultCardToggle(c)
+                }
+                Toast.makeText(requireContext(), R.string.mib_qr_nfc_not_supported, Toast.LENGTH_SHORT).show()
+            } else {
+                handleDefaultCardToggle(isChecked)
+            }
+        }
+
         // After layout pass, compute offsets, save carousel snapshot, and animate
         binding.contentLayout.doOnNextLayout {
             val mgr = binding.manageCardView.root
@@ -308,6 +315,12 @@ ViewCompat.setOnApplyWindowInsetsListener(binding.contentLayout) { v, insets ->
         }
     }
 
+    private fun handleDefaultCardToggle(isChecked: Boolean) {
+        val item = cards.getOrNull(currentCardPosition) as? CardItem.Bml ?: return
+        store.setDefaultCardAccountNumber(if (isChecked) item.account.accountNumber else null)
+        rebuildCards()
+    }
+
     private fun exitManageMode() {
         binding.manageCardView.root.animate().cancel()
         binding.tvSelectedCardType.animate().cancel()
@@ -350,6 +363,8 @@ ViewCompat.setOnApplyWindowInsetsListener(binding.contentLayout) { v, insets ->
                 binding.rvCards.visibility = View.VISIBLE
                 binding.llPayButtons.visibility = View.VISIBLE
                 binding.llManageButtons.visibility = View.GONE
+                binding.llDefaultCardRow.visibility = View.GONE
+                binding.switchDefaultCard.setOnCheckedChangeListener(null)
                 buildDots(cards.size, currentCardPosition)
             }
             .start()
@@ -362,6 +377,42 @@ ViewCompat.setOnApplyWindowInsetsListener(binding.contentLayout) { v, insets ->
             .start()
     }
 
+    private fun rebuildCards() {
+        // Remember which card is currently selected by identity so we can restore position after reorder
+        val currentCard = cards.getOrNull(currentCardPosition)
+
+        val defaultNum = store.getDefaultCardAccountNumber()
+        val mibItems = (viewModel.mibCards.value ?: emptyList()).map { CardItem.Mib(it) }
+        val bmlItems = (viewModel.accounts.value ?: emptyList())
+            .filter { it.profileType == "BML_PREPAID" || it.profileType == "BML_CREDIT" || it.profileType == "BML_DEBIT" }
+            .map { CardItem.Bml(it) }
+        val all: List<CardItem> = mibItems + bmlItems
+        // Move default BML card to front
+        cards = if (defaultNum != null) {
+            val def = all.filterIsInstance<CardItem.Bml>().firstOrNull { it.account.accountNumber == defaultNum }
+            if (def != null) listOf(def) + all.filter { it !== def } else all
+        } else all
+
+        // Restore position to follow the same card after reorder
+        if (currentCard != null) {
+            val newPos = cards.indexOf(currentCard)
+            if (newPos >= 0 && newPos != currentCardPosition) {
+                currentCardPosition = newPos
+                binding.rvCards.scrollToPosition(newPos)
+            }
+        }
+
+        stackAdapter.update(cards)
+        binding.loadingView.visibility = View.GONE
+        val empty = cards.isEmpty()
+        binding.emptyView.visibility = if (empty) View.VISIBLE else View.GONE
+        binding.contentLayout.visibility = if (empty) View.GONE else View.VISIBLE
+        if (!empty) {
+            buildDots(cards.size, currentCardPosition)
+            updateCardInfo(currentCardPosition)
+        }
+    }
+
     private fun applyCardScales() {
         val rv = binding.rvCards
         val rvCenter = rv.paddingStart + (rv.width - rv.paddingStart - rv.paddingEnd) / 2f

app/src/main/java/sh/sar/basedbank/ui/home/TransferFragment.kt

@@ -293,6 +293,25 @@ class TransferFragment : Fragment() {
             }
             bmlQrInfo = info
 
+            // Auto-select the user's default BML card if no card was pre-selected
+            if (selectedAccount == null) {
+                val defaultNum = CredentialStore(requireContext()).getDefaultCardAccountNumber()
+                if (defaultNum != null) {
+                    val allAccounts = viewModel.accounts.value ?: emptyList()
+                    val defaultCard = allAccounts.firstOrNull {
+                        it.accountNumber == defaultNum &&
+                        (it.profileType == "BML_PREPAID" || it.profileType == "BML_CREDIT" || it.profileType == "BML_DEBIT") &&
+                        it.statusDesc.equals("Active", ignoreCase = true)
+                    }
+                    if (defaultCard != null) {
+                        selectedAccount = defaultCard
+                        updateAmountPrefix(defaultCard)
+                        showFromCard(defaultCard)
+                        updateTransferButton()
+                    }
+                }
+            }
+
             // Show merchant in the "To" card — clear button hidden (can't change recipient for QR)
             binding.tvToAccountName.text = info.merchantName
             binding.tvToBankBic.text = info.merchantAddress.ifBlank { "BML Merchant" }

app/src/main/java/sh/sar/basedbank/util/CredentialStore.kt

@@ -615,6 +615,18 @@ class CredentialStore(context: Context) {
         } catch (_: Exception) { null }
     }
 
+    // ── Default payment card ──────────────────────────────────────────────────
+
+    /** BML card account number the user has pinned as their default payment card, or null. */
+    fun getDefaultCardAccountNumber(): String? = prefs.getString("default_card_account_number", null)
+
+    fun setDefaultCardAccountNumber(accountNumber: String?) {
+        val editor = prefs.edit()
+        if (accountNumber == null) editor.remove("default_card_account_number")
+        else editor.putString("default_card_account_number", accountNumber)
+        editor.apply()
+    }
+
     // ── MIB profile visibility (per loginId) ─────────────────────────────────
 
     /** Returns the set of MIB profile IDs the user has chosen to hide (for a given loginId). */

app/src/main/res/layout/fragment_cards.xml

@@ -147,6 +147,32 @@
 
             </LinearLayout>
 
+            <!-- Default card toggle (manage mode only) -->
+            <LinearLayout
+                android:id="@+id/llDefaultCardRow"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal"
+                android:gravity="center_vertical"
+                android:paddingHorizontal="20dp"
+                android:paddingTop="4dp"
+                android:paddingBottom="4dp"
+                android:visibility="gone">
+
+                <TextView
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:text="@string/card_set_as_default"
+                    android:textAppearance="?attr/textAppearanceBodyMedium" />
+
+                <com.google.android.material.materialswitch.MaterialSwitch
+                    android:id="@+id/switchDefaultCard"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content" />
+
+            </LinearLayout>
+
             <!-- Card management actions (manage mode only) -->
             <LinearLayout
                 android:id="@+id/llManageButtons"

app/src/main/res/values/strings.xml

@@ -331,6 +331,7 @@
     <string name="card_pay_nfc">Tap to Pay</string>
     <string name="mib_qr_nfc_not_supported">Skill issue on MIB side, Not supported</string>
     <string name="card_manage">Manage Card</string>
+    <string name="card_set_as_default">Set as Default Card</string>
     <string name="card_action_change_pin">Change PIN</string>
     <string name="card_action_freeze">Freeze</string>
     <string name="card_action_block">Block</string>