lay out initial settings framework

don't implement them yet because we want to merge with 3i's

lib/headphones/huawei/freebuds4i_sim.dart

@@ -4,17 +4,44 @@ import '../framework/anc.dart';
 import '../framework/lrc_battery.dart';
 import '../simulators/anc_sim.dart';
 import '../simulators/bluetooth_headphones_sim.dart';
-import '../simulators/headphones_settings_sim.dart';
 import '../simulators/lrc_battery_sim.dart';
 import 'freebuds4i.dart';
 import 'settings.dart';
 
 final class HuaweiFreeBuds4iSim extends HuaweiFreeBuds4i
-    with
-        BluetoothHeadphonesSim,
-        LRCBatteryAlwaysFullSim,
-        AncSim,
-        HeadphonesSettingsSim<HuaweiFreeBuds4iSettings> {}
+    with BluetoothHeadphonesSim, LRCBatteryAlwaysFullSim, AncSim {
+  // ehhhhhh...
+
+  final _settingsCtrl = BehaviorSubject<HuaweiFreeBuds4iSettings>.seeded(
+    const HuaweiFreeBuds4iSettings(
+      doubleTapLeft: DoubleTap.playPause,
+      doubleTapRight: DoubleTap.playPause,
+      holdBoth: Hold.cycleAnc,
+      holdBothToggledAncModes: {
+        AncMode.noiseCancelling,
+        AncMode.off,
+        AncMode.transparency,
+      },
+      autoPause: true,
+    ),
+  );
+
+  @override
+  ValueStream<HuaweiFreeBuds4iSettings> get settings => _settingsCtrl.stream;
+
+  @override
+  Future<void> setSettings(HuaweiFreeBuds4iSettings newSettings) async {
+    _settingsCtrl.add(
+      _settingsCtrl.value.copyWith(
+        doubleTapLeft: newSettings.doubleTapLeft,
+        doubleTapRight: newSettings.doubleTapRight,
+        holdBoth: newSettings.holdBoth,
+        holdBothToggledAncModes: newSettings.holdBothToggledAncModes,
+        autoPause: newSettings.autoPause,
+      ),
+    );
+  }
+}
 
 /// Class to use as placeholder for Disabled() widget
 // this is not done with mixins because we may want to fill it with

lib/headphones/huawei/settings.dart

@@ -17,6 +17,23 @@ class HuaweiFreeBuds4iSettings {
     this.holdBothToggledAncModes,
     this.autoPause,
   });
+
+  // don't want to use codegen *yet*
+  HuaweiFreeBuds4iSettings copyWith({
+    DoubleTap? doubleTapLeft,
+    DoubleTap? doubleTapRight,
+    Hold? holdBoth,
+    Set<AncMode>? holdBothToggledAncModes,
+    bool? autoPause,
+  }) =>
+      HuaweiFreeBuds4iSettings(
+        doubleTapLeft: doubleTapLeft ?? this.doubleTapLeft,
+        doubleTapRight: doubleTapRight ?? this.doubleTapRight,
+        holdBoth: holdBoth ?? this.holdBoth,
+        holdBothToggledAncModes:
+            holdBothToggledAncModes ?? this.holdBothToggledAncModes,
+        autoPause: autoPause ?? this.autoPause,
+      );
 }
 
 // i don't have idea how to public/privatise those and how to name them

lib/ui/pages/headphones_settings/headphones_settings_page.dart

@@ -1,7 +1,12 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 
+import '../../../headphones/framework/headphones_settings.dart';
+import '../../../headphones/huawei/settings.dart';
 import '../../common/headphones_connection_ensuring_overlay.dart';
+import 'huawei/auto_pause_section.dart';
+import 'huawei/double_tap_section.dart';
+import 'huawei/hold_section.dart';
 
 class HeadphonesSettingsPage extends StatelessWidget {
   const HeadphonesSettingsPage({super.key});
@@ -13,22 +18,28 @@ class HeadphonesSettingsPage extends StatelessWidget {
       appBar: AppBar(title: Text(l.pageHeadphonesSettingsTitle)),
       body: Center(
         child: HeadphonesConnectionEnsuringOverlay(
-          builder: (_, h) {
-            return ListView(
-              children: [
-                // TODO MIGRATION: hp settings not yet implemented
-                const Text('HP Settings not yet implemented'),
-                // AutoPauseSection(headphones: h),
-                // const Divider(indent: 16, endIndent: 16),
-                // DoubleTapSection(headphones: h),
-                // const Divider(indent: 16, endIndent: 16),
-                // HoldSection(headphones: h),
-                // const SizedBox(height: 64),
-              ],
-            );
-          },
+          builder: (_, h) =>
+              ListView(children: widgetsForModel(h as HeadphonesSettings)),
         ),
       ),
     );
   }
 }
+
+// this is shitty. and we don't want this. not here.
+// ...
+// but i have no better idea for now :)))))
+List<Widget> widgetsForModel(HeadphonesSettings settings) {
+  if (settings is HeadphonesSettings<HuaweiFreeBuds4iSettings>) {
+    return [
+      AutoPauseSection(settings),
+      const Divider(indent: 16, endIndent: 16),
+      DoubleTapSection(settings),
+      const Divider(indent: 16, endIndent: 16),
+      HoldSection(settings),
+      const SizedBox(height: 64),
+    ];
+  } else {
+    throw "You shouldn't be on this screen if you don't have settings!";
+  }
+}

lib/ui/pages/headphones_settings/huawei/auto_pause_section.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_gen/gen_l10n/app_localizations.dart';
+
+import '../../../../headphones/framework/headphones_settings.dart';
+import '../../../../headphones/huawei/settings.dart';
+import '../../../common/list_tile_switch.dart';
+
+class AutoPauseSection extends StatelessWidget {
+  final HeadphonesSettings<HuaweiFreeBuds4iSettings> headphones;
+
+  const AutoPauseSection(this.headphones, {super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final l = AppLocalizations.of(context)!;
+    return StreamBuilder(
+      stream: headphones.settings.map((s) => s.autoPause),
+      initialData: false,
+      builder: (_, snap) {
+        return ListTileSwitch(
+          title: Text(l.autoPause),
+          subtitle: Text(l.autoPauseDesc),
+          value: snap.data ?? false,
+          onChanged: (newVal) => headphones.setSettings(
+            HuaweiFreeBuds4iSettings(autoPause: newVal),
+          ),
+        );
+      },
+    );
+  }
+}

lib/ui/pages/headphones_settings/double_tap_section.dart → lib/ui/pages/headphones_settings/huawei/double_tap_section.dart

@@ -1,31 +1,30 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 
-import '../../../headphones/_old/headphones_base.dart';
-import '../../../headphones/_old/headphones_data_objects.dart';
-import '../../common/list_tile_radio.dart';
-import '../../common/list_tile_switch.dart';
-import '../disabled.dart';
+import '../../../../headphones/framework/headphones_settings.dart';
+import '../../../../headphones/huawei/settings.dart';
+import '../../../common/list_tile_radio.dart';
+import '../../../common/list_tile_switch.dart';
+import '../../disabled.dart';
 
 class DoubleTapSection extends StatelessWidget {
-  final HeadphonesBase headphones;
+  final HeadphonesSettings<HuaweiFreeBuds4iSettings> headphones;
 
-  const DoubleTapSection({super.key, required this.headphones});
+  const DoubleTapSection(this.headphones, {super.key});
 
   @override
   Widget build(BuildContext context) {
     final t = Theme.of(context);
     final tt = t.textTheme;
     final l = AppLocalizations.of(context)!;
-    return StreamBuilder<HeadphonesGestureSettings>(
-      stream: headphones.gestureSettings,
-      initialData: headphones.gestureSettings.valueOrNull ??
-          const HeadphonesGestureSettings(),
-      builder: (context, snapshot) {
-        final gs = snapshot.data!;
+    return StreamBuilder(
+      stream: headphones.settings
+          .map((s) => (l: s.doubleTapLeft, r: s.doubleTapRight)),
+      initialData: (l: null, r: null),
+      builder: (context, snap) {
+        final dt = snap.data!;
         final enabled =
-            (gs.doubleTapLeft != HeadphonesGestureDoubleTap.nothing ||
-                gs.doubleTapRight != HeadphonesGestureDoubleTap.nothing);
+            (dt.l != DoubleTap.nothing || dt.r != DoubleTap.nothing);
         return Column(
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
@@ -34,14 +33,9 @@ class DoubleTapSection extends StatelessWidget {
               subtitle: Text(l.pageHeadphonesSettingsDoubleTapDesc),
               value: enabled,
               onChanged: (newVal) {
-                final g = newVal
-                    ? HeadphonesGestureDoubleTap.playPause
-                    : HeadphonesGestureDoubleTap.nothing;
-                headphones.setGestureSettings(
-                  HeadphonesGestureSettings(
-                    doubleTapLeft: g,
-                    doubleTapRight: g,
-                  ),
+                final g = newVal ? DoubleTap.playPause : DoubleTap.nothing;
+                headphones.setSettings(
+                  HuaweiFreeBuds4iSettings(doubleTapLeft: g, doubleTapRight: g),
                 );
               },
             ),
@@ -57,10 +51,10 @@ class DoubleTapSection extends StatelessWidget {
                           l.pageHeadphonesSettingsLeftBud,
                           style: tt.titleMedium,
                         ),
-                        value: gs.doubleTapLeft,
+                        value: dt.l,
                         onChanged: enabled
-                            ? (g) => headphones.setGestureSettings(
-                                  HeadphonesGestureSettings(doubleTapLeft: g),
+                            ? (g) => headphones.setSettings(
+                                  HuaweiFreeBuds4iSettings(doubleTapLeft: g),
                                 )
                             : null,
                       ),
@@ -71,10 +65,10 @@ class DoubleTapSection extends StatelessWidget {
                           l.pageHeadphonesSettingsRightBud,
                           style: tt.titleMedium,
                         ),
-                        value: gs.doubleTapRight,
+                        value: dt.r,
                         onChanged: enabled
-                            ? (g) => headphones.setGestureSettings(
-                                  HeadphonesGestureSettings(doubleTapRight: g),
+                            ? (g) => headphones.setSettings(
+                                  HuaweiFreeBuds4iSettings(doubleTapRight: g),
                                 )
                             : null,
                       ),
@@ -92,8 +86,8 @@ class DoubleTapSection extends StatelessWidget {
 
 class _DoubleTapSetting extends StatelessWidget {
   final Widget? title;
-  final HeadphonesGestureDoubleTap? value;
-  final void Function(HeadphonesGestureDoubleTap?)? onChanged;
+  final DoubleTap? value;
+  final void Function(DoubleTap?)? onChanged;
 
   const _DoubleTapSetting({
     required this.value,
@@ -117,35 +111,35 @@ class _DoubleTapSetting extends StatelessWidget {
           ],
           ListTileRadio(
             title: Text(l.pageHeadphonesSettingsDoubleTapPlayPause),
-            value: HeadphonesGestureDoubleTap.playPause,
+            value: DoubleTap.playPause,
             dense: true,
             groupValue: value,
             onChanged: onChanged,
           ),
           ListTileRadio(
             title: Text(l.pageHeadphonesSettingsDoubleTapNextSong),
-            value: HeadphonesGestureDoubleTap.next,
+            value: DoubleTap.next,
             dense: true,
             groupValue: value,
             onChanged: onChanged,
           ),
           ListTileRadio(
             title: Text(l.pageHeadphonesSettingsDoubleTapPrevSong),
-            value: HeadphonesGestureDoubleTap.previous,
+            value: DoubleTap.previous,
             dense: true,
             groupValue: value,
             onChanged: onChanged,
           ),
           ListTileRadio(
             title: Text(l.pageHeadphonesSettingsDoubleTapAssist),
-            value: HeadphonesGestureDoubleTap.voiceAssistant,
+            value: DoubleTap.voiceAssistant,
             dense: true,
             groupValue: value,
             onChanged: onChanged,
           ),
           ListTileRadio(
             title: Text(l.pageHeadphonesSettingsDoubleTapNone),
-            value: HeadphonesGestureDoubleTap.nothing,
+            value: DoubleTap.nothing,
             dense: true,
             groupValue: value,
             onChanged: onChanged,