import { NavigationContainer } from '@react-navigation/native';
import { createNativeStackNavigator } from '@react-navigation/native-stack';
import { FontAwesomeIcon } from '@fortawesome/react-native-fontawesome';
import { faBars } from '@fortawesome/free-solid-svg-icons/faBars';
import { Image, Modal, Pressable, StyleSheet, Text, View } from 'react-native';
import { SafeAreaProvider, SafeAreaView } from 'react-native-safe-area-context';
import { StatusBar } from 'expo-status-bar';
import { useState } from 'react';
import { EventListScreen } from '../screens/EventListScreen';
import { EventDetailScreen } from '../screens/EventDetailScreen';
import { AddEventScreen } from '../screens/AddEventScreen';
import { SettingsScreen } from '../screens/SettingsScreen';
import { CalendarImportScreen } from '../screens/CalendarImportScreen';
import type { RootStack } from '../types/navigation';
import navLogo from '../../assets/nav-logo.png';

// ── Root Stack ──

const Root = createNativeStackNavigator<RootStack>();
const byPrefixAndName = { fas: { bars: faBars } };

type HeaderMenuProps = {
  navigation: {
    navigate: (screen: 'CalendarImport' | 'Settings') => void;
  };
};

function HeaderMenu({ navigation }: HeaderMenuProps) {
  const [isOpen, setIsOpen] = useState(false);

  const navigateTo = (screen: 'CalendarImport' | 'Settings') => {
    setIsOpen(false);
    navigation.navigate(screen);
  };

  return (
    <>
      <Pressable
        accessibilityLabel="Open menu"
        accessibilityRole="button"
        hitSlop={12}
        onPress={() => setIsOpen(true)}
        style={({ pressed }) => [styles.menuButton, pressed && styles.menuButtonPressed]}
      >
        <FontAwesomeIcon icon={byPrefixAndName.fas['bars']} color="#F4F1EA" size={22} />
      </Pressable>

      <Modal animationType="fade" transparent visible={isOpen} onRequestClose={() => setIsOpen(false)}>
        <Pressable style={styles.menuOverlay} onPress={() => setIsOpen(false)}>
          <View style={styles.menuPanel}>
            <Pressable
              accessibilityRole="menuitem"
              onPress={() => navigateTo('CalendarImport')}
              style={({ pressed }) => [styles.menuItem, pressed && styles.menuItemPressed]}
            >
              <Text style={styles.menuItemText}>Calendar</Text>
            </Pressable>
            <Pressable
              accessibilityRole="menuitem"
              onPress={() => navigateTo('Settings')}
              style={({ pressed }) => [styles.menuItem, pressed && styles.menuItemPressed]}
            >
              <Text style={styles.menuItemText}>Settings</Text>
            </Pressable>
          </View>
        </Pressable>
      </Modal>
    </>
  );
}

/**
 * Root native stack navigator for the app.
 * Wraps all screens in SafeAreaProvider/SafeAreaView with a dark header bar.
 */
export default function AppNavigator() {
  return (
    <SafeAreaProvider>
      <SafeAreaView style={{ flex: 1, backgroundColor: '#090816' }}>
        <StatusBar style="light" />
        <NavigationContainer>
          <Root.Navigator
            initialRouteName="EventList"
            screenOptions={({ navigation }) => ({
              headerStyle: { backgroundColor: '#17112A' },
              headerTintColor: '#F4F1EA',
              headerRight: () => <HeaderMenu navigation={navigation} />,
              headerTitle: () => (
                <View style={{ flexDirection: 'row', alignItems: 'center', gap: 8 }}>
                  <Image source={navLogo} style={{ width: 28, height: 28, borderRadius: 6 }} resizeMode="contain" />
                  <Text style={{ color: '#F4F1EA', fontSize: 18, fontWeight: '600' }}>Time</Text>
                  <Text style={{ color: '#ea1579', fontSize: 18, fontWeight: '600' }}>To </Text>
                  <Text style={{ color: '#F4F1EA', fontSize: 18, fontWeight: '600' }}>Leave</Text>

                </View>
              ),
            })}
          >
            <Root.Screen name="EventList" component={EventListScreen} />
            <Root.Screen name="AddEvent" component={AddEventScreen} />
            <Root.Screen name="EventDetail" component={EventDetailScreen} />
            <Root.Screen name="Settings" component={SettingsScreen} />
            <Root.Screen name="CalendarImport" component={CalendarImportScreen} />
          </Root.Navigator>
        </NavigationContainer>
      </SafeAreaView>
    </SafeAreaProvider>
  );
}

const styles = StyleSheet.create({
  menuButton: {
    alignItems: 'center',
    height: 40,
    justifyContent: 'center',
    width: 40,
  },
  menuButtonPressed: {
    opacity: 0.65,
  },
  menuOverlay: {
    alignItems: 'flex-end',
    backgroundColor: 'rgba(9, 8, 22, 0.45)',
    flex: 1,
    paddingRight: 12,
    paddingTop: 72,
  },
  menuPanel: {
    backgroundColor: '#17112A',
    borderColor: '#3B3157',
    borderRadius: 8,
    borderWidth: 1,
    minWidth: 168,
    overflow: 'hidden',
  },
  menuItem: {
    paddingHorizontal: 18,
    paddingVertical: 14,
  },
  menuItemPressed: {
    backgroundColor: '#2A2140',
  },
  menuItemText: {
    color: '#F4F1EA',
    fontSize: 16,
    fontWeight: '600',
  },
});