import React from 'react';
import { YStack, XStack } from '@tamagui/stacks';
import { SizableText as Text } from '@tamagui/text';
import { Pressable } from '@tamagui/react-native-web-lite';
import { Home, CheckSquare, Image as ImageIcon, User } from 'lucide-react';
import { useTheme } from '@tamagui/core';
import { useTranslation } from 'react-i18next';

const ICON_SIZE = 18;

export type NavKey = 'home' | 'tasks' | 'uploads' | 'profile';

export function BottomNav({ active, onNavigate }: { active: NavKey; onNavigate: (key: NavKey) => void }) {
  const { t } = useTranslation('mobile');
  const theme = useTheme();
  const items: Array<{ key: NavKey; icon: React.ComponentType<{ size?: number; color?: string }>; label: string }> = [
    { key: 'home', icon: Home, label: t('nav.home', 'Home') },
    { key: 'tasks', icon: CheckSquare, label: t('nav.tasks', 'Tasks') },
    { key: 'uploads', icon: ImageIcon, label: t('nav.uploads', 'Uploads') },
    { key: 'profile', icon: User, label: t('nav.profile', 'Profile') },
  ];

  return (
        <YStack
          position="fixed"
          bottom={0}
          left={0}
          right={0}
          backgroundColor={String(theme.surface?.val ?? 'white')}
          borderTopWidth={1}
          borderColor={String(theme.borderColor?.val ?? '#e5e7eb')}
          paddingVertical="$2"
          paddingHorizontal="$4"
          zIndex={50}
      shadowColor="#0f172a"
      shadowOpacity={0.08}
      shadowRadius={12}
      shadowOffset={{ width: 0, height: -4 }}
      // allow for safe-area inset on modern phones
      style={{ paddingBottom: 'max(env(safe-area-inset-bottom, 0px), 8px)' }}
    >
      <XStack justifyContent="space-between" alignItems="center">
        {items.map((item) => {
          const activeState = item.key === active;
          const IconCmp = item.icon;
          return (
            <Pressable key={item.key} onPress={() => onNavigate(item.key)}>
              <YStack
                flexGrow={1}
                flexBasis="0%"
                alignItems="center"
                justifyContent="center"
                space="$1"
                position="relative"
                minWidth={88}
                minHeight={64}
                paddingHorizontal="$3"
                paddingVertical="$2"
                borderRadius={12}
                backgroundColor={activeState ? '#e8f1ff' : 'transparent'}
                gap="$1"
              >
                <YStack width={ICON_SIZE} height={ICON_SIZE} alignItems="center" justifyContent="center" shrink={0}>
                  <IconCmp size={ICON_SIZE} color={activeState ? String(theme.primary?.val ?? '#007AFF') : '#94a3b8'} />
                </YStack>
                <Text
                  fontSize="$xs"
                  fontWeight="700"
                  fontFamily="$body"
                  color={activeState ? '$primary' : '#6b7280'}
                  textAlign="center"
                  flexShrink={1}
                >
                  {item.label}
                </Text>
              </YStack>
            </Pressable>
          );
        })}
      </XStack>
    </YStack>
  );
}
