import { Ionicons } from '@expo/vector-icons';
import { createBottomTabNavigator } from '@react-navigation/bottom-tabs';
import { createNativeStackNavigator } from '@react-navigation/native-stack';
import { Pressable, StyleSheet, View } from 'react-native';
import { colors } from '../theme/colors';
import { DashboardScreen } from '../screens/DashboardScreen';
import { HistoryScreen } from '../screens/HistoryScreen';
import { AddTransactionScreen } from '../screens/AddTransactionScreen';
import { EditTransactionScreen } from '../screens/EditTransactionScreen';
import { RecurringFormScreen } from '../screens/RecurringFormScreen';
import { TargetFormScreen } from '../screens/TargetFormScreen';
import { CategoryFormScreen } from '../screens/CategoryFormScreen';
import { OnboardingScreen } from '../screens/OnboardingScreen';
import { SavingsScreen } from '../screens/SavingsScreen';
import { SettingsScreen } from '../screens/SettingsScreen';
import type { TransactionType } from '../types';

export type RootTabParamList = {
  Beranda: undefined;
  Riwayat: undefined;
  Catat: { type?: TransactionType } | undefined;
  Tabungan: undefined;
  Pengaturan: undefined;
};

export type RootStackParamList = {
  Main: undefined;
  Onboarding: undefined;
  EditTransaksi: { transactionId: number };
  RecurringForm: undefined;
  TargetForm: undefined;
  CategoryForm:
    | {
        categoryId?: number;
        initialName?: string;
        initialIcon?: string;
        defaultType?: TransactionType;
      }
    | undefined;
};

const Tab = createBottomTabNavigator<RootTabParamList>();
const Stack = createNativeStackNavigator<RootStackParamList>();

type IoniconName = React.ComponentProps<typeof Ionicons>['name'];

const tabIcon =
  (focusedName: IoniconName, unfocusedName: IoniconName) =>
  ({ color, size, focused }: { color: string; size: number; focused: boolean }) =>
    (
      <Ionicons
        name={focused ? focusedName : unfocusedName}
        size={size}
        color={color}
      />
    );

/** Tombol "+" melingkar di tengah tab bar (FAB) */
function FabButton({
  onPress,
  accessibilityState,
}: {
  onPress?: (...args: any[]) => void;
  accessibilityState?: { selected?: boolean };
}) {
  const focused = accessibilityState?.selected;
  return (
    <Pressable
      onPress={onPress}
      style={({ pressed }) => [styles.fabWrapper, pressed && styles.fabPressed]}
      hitSlop={8}
    >
      <View style={[styles.fab, focused && styles.fabActive]}>
        <Ionicons name="add" size={32} color={colors.white} />
      </View>
    </Pressable>
  );
}

function MainTabs() {
  return (
    <Tab.Navigator
      screenOptions={{
        tabBarActiveTintColor: colors.primary,
        tabBarInactiveTintColor: colors.textMuted,
        tabBarLabelStyle: styles.tabLabel,
        tabBarStyle: styles.tabBar,
        headerTitleStyle: { fontWeight: '700', color: colors.text },
        headerStyle: { backgroundColor: colors.background },
        headerShadowVisible: false,
      }}
    >
      <Tab.Screen
        name="Beranda"
        component={DashboardScreen}
        options={{
          headerShown: false,
          tabBarIcon: tabIcon('home', 'home-outline'),
        }}
      />
      <Tab.Screen
        name="Riwayat"
        component={HistoryScreen}
        options={{
          title: 'Riwayat',
          tabBarIcon: tabIcon('list', 'list-outline'),
        }}
      />
      <Tab.Screen
        name="Catat"
        component={AddTransactionScreen}
        options={{
          title: 'Catat',
          tabBarIcon: () => null,
          tabBarLabel: () => null,
          tabBarButton: (props) => <FabButton {...props} />,
        }}
      />
      <Tab.Screen
        name="Tabungan"
        component={SavingsScreen}
        options={{
          tabBarIcon: tabIcon('wallet', 'wallet-outline'),
        }}
      />
      <Tab.Screen
        name="Pengaturan"
        component={SettingsScreen}
        options={{
          tabBarIcon: tabIcon('settings', 'settings-outline'),
        }}
      />
    </Tab.Navigator>
  );
}

export function RootNavigator({
  initialRoute = 'Main',
}: {
  initialRoute?: 'Main' | 'Onboarding';
}) {
  return (
    <Stack.Navigator
      initialRouteName={initialRoute}
      screenOptions={{ headerShown: false }}
    >
      <Stack.Screen name="Main" component={MainTabs} />
      <Stack.Screen name="Onboarding" component={OnboardingScreen} />
      <Stack.Screen
        name="EditTransaksi"
        component={EditTransactionScreen}
        options={{
          presentation: 'modal',
          headerShown: true,
          title: 'Edit Transaksi',
          headerTitleStyle: { fontWeight: '700', color: colors.text },
          headerStyle: { backgroundColor: colors.background },
          headerShadowVisible: false,
        }}
      />
      <Stack.Screen
        name="RecurringForm"
        component={RecurringFormScreen}
        options={{
          presentation: 'modal',
          headerShown: true,
          title: 'Transaksi Berulang',
          headerTitleStyle: { fontWeight: '700', color: colors.text },
          headerStyle: { backgroundColor: colors.background },
          headerShadowVisible: false,
        }}
      />
      <Stack.Screen
        name="TargetForm"
        component={TargetFormScreen}
        options={{
          presentation: 'modal',
          headerShown: true,
          title: 'Target Tabungan',
          headerTitleStyle: { fontWeight: '700', color: colors.text },
          headerStyle: { backgroundColor: colors.background },
          headerShadowVisible: false,
        }}
      />
      <Stack.Screen
        name="CategoryForm"
        component={CategoryFormScreen}
        options={({ route }) => ({
          presentation: 'modal',
          headerShown: true,
          title: route.params?.categoryId != null ? 'Edit Kategori' : 'Kategori Baru',
          headerTitleStyle: { fontWeight: '700', color: colors.text },
          headerStyle: { backgroundColor: colors.background },
          headerShadowVisible: false,
        })}
      />
    </Stack.Navigator>
  );
}

const styles = StyleSheet.create({
  tabBar: {
    backgroundColor: colors.surface,
    borderTopColor: colors.border,
    borderTopWidth: 1,
    height: 62,
    paddingTop: 4,
    paddingBottom: 6,
  },
  tabLabel: {
    fontSize: 10,
    fontWeight: '600',
  },
  fabWrapper: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
    top: -24,
  },
  fabPressed: { opacity: 0.85 },
  fab: {
    width: 58,
    height: 58,
    borderRadius: 29,
    backgroundColor: colors.primary,
    alignItems: 'center',
    justifyContent: 'center',
    borderWidth: 4,
    borderColor: colors.surface,
    shadowColor: colors.primaryDark,
    shadowOpacity: 0.35,
    shadowRadius: 10,
    shadowOffset: { width: 0, height: 5 },
    elevation: 8,
  },
  fabActive: {
    backgroundColor: colors.primaryDark,
  },
});