/**
 * AppNavigator
 * Root navigation with tab and stack navigators
 */

import React from 'react';
import { NavigationContainer } from '@react-navigation/native';
import { createBottomTabNavigator } from '@react-navigation/bottom-tabs';
import { createStackNavigator } from '@react-navigation/stack';
import Icon from 'react-native-vector-icons/MaterialIcons';

// Screens
import HomeScreen from '../screens/HomeScreen';
import StatsScreen from '../screens/StatsScreen';
import ProfileScreen from '../screens/ProfileScreen';

const Tab = createBottomTabNavigator();
const Stack = createStackNavigator();

// Home Stack
function HomeStack() {
  return (
    <Stack.Navigator screenOptions={{ headerShown: false }}>
      <Stack.Screen name="HomeMain" component={HomeScreen} />
    </Stack.Navigator>
  );
}

// Main Tab Navigator
function MainTabs() {
  return (
    <Tab.Navigator
      screenOptions={({ route }) => ({
        headerShown: false,
        tabBarStyle: {
          backgroundColor: '#1C1C1E',
          borderTopColor: '#2C2C2E',
          paddingBottom: 8,
          paddingTop: 8,
        },
        tabBarActiveTintColor: '#007AFF',
        tabBarInactiveTintColor: '#8E8E93',
        tabBarIcon: ({ focused, color, size }) => {
          let iconName;
          
          switch (route.name) {
            case 'Home':
              iconName = 'camera-alt';
              break;
            case 'Stats':
              iconName = 'bar-chart';
              break;
            case 'Profile':
              iconName = 'person';
              break;
            default:
              iconName = 'circle';
          }
          
          return <Icon name={iconName} size={size} color={color} />;
        },
      })}
    >
      <Tab.Screen 
        name="Home" 
        component={HomeStack}
        options={{ tabBarLabel: 'Capture' }}
      />
      <Tab.Screen 
        name="Stats" 
        component={StatsScreen}
        options={{ tabBarLabel: 'Stats' }}
      />
      <Tab.Screen 
        name="Profile" 
        component={ProfileScreen}
        options={{ tabBarLabel: 'Profile' }}
      />
    </Tab.Navigator>
  );
}

// Root Navigator
export default function AppNavigator() {
  return (
    <NavigationContainer>
      <MainTabs />
    </NavigationContainer>
  );
}