prep work for dhivehi support

app/src/main/java/sh/sar/basedbank/ui/onboarding/OnboardingActivity.kt

@@ -4,8 +4,11 @@ import android.content.Intent
 import android.os.Bundle
 import android.view.View
 import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.core.os.LocaleListCompat
 import androidx.viewpager2.widget.ViewPager2
 import com.google.android.material.tabs.TabLayoutMediator
+import sh.sar.basedbank.R
 import sh.sar.basedbank.databinding.ActivityOnboardingBinding
 import sh.sar.basedbank.ui.login.LoginActivity
 
@@ -23,11 +26,28 @@ class OnboardingActivity : AppCompatActivity() {
 
         TabLayoutMediator(binding.dotsIndicator, binding.viewPager) { _, _ -> }.attach()
 
+        // Pre-select the chip for the saved language without triggering the listener
+        val savedLang = getSharedPreferences("prefs", MODE_PRIVATE).getString("language", null)
+        binding.languageChipGroup.setOnCheckedStateChangeListener(null)
+        when (savedLang) {
+            "en" -> binding.chipEnglish.isChecked = true
+            "dv" -> binding.chipDhivehi.isChecked = true
+        }
+        binding.languageChipGroup.setOnCheckedStateChangeListener { _, checkedIds ->
+            if (checkedIds.isNotEmpty()) {
+                val lang = if (checkedIds[0] == R.id.chipEnglish) "en" else "dv"
+                selectLanguage(lang)
+            }
+        }
+
         binding.viewPager.registerOnPageChangeCallback(object : ViewPager2.OnPageChangeCallback() {
             override fun onPageSelected(position: Int) {
+                binding.languageChipGroup.visibility = if (position == 0) View.VISIBLE else View.GONE
                 updateButtons(position, adapter.itemCount)
             }
         })
+        // Show chips and set initial button state for page 0
+        binding.languageChipGroup.visibility = View.VISIBLE
         updateButtons(0, adapter.itemCount)
 
         binding.btnNext.setOnClickListener {
@@ -43,9 +63,19 @@ class OnboardingActivity : AppCompatActivity() {
         }
     }
 
+    private fun selectLanguage(lang: String) {
+        getSharedPreferences("prefs", MODE_PRIVATE).edit().putString("language", lang).apply()
+        val locales = LocaleListCompat.forLanguageTags(lang)
+        AppCompatDelegate.setApplicationLocales(locales)
+        // Update buttons immediately in case locale didn't change (no recreation)
+        updateButtons(binding.viewPager.currentItem, binding.viewPager.adapter?.itemCount ?: 3)
+    }
+
     private fun updateButtons(position: Int, count: Int) {
+        val langSelected = getSharedPreferences("prefs", MODE_PRIVATE).getString("language", null) != null
         val isLast = position == count - 1
         binding.btnNext.visibility = if (isLast) View.GONE else View.VISIBLE
         binding.btnGetStarted.visibility = if (isLast) View.VISIBLE else View.GONE
+        binding.btnNext.isEnabled = position > 0 || langSelected
     }
 }