import { router } from 'expo-router';
import { ActivityIndicator, Pressable, ScrollView, StyleSheet, Text, View } from 'react-native';
import { useQuery } from '@tanstack/react-query';
import { useTranslation } from 'react-i18next';
import { fetchCategories } from '@/src/api/recipes.api';
import { ErrorView } from '@/src/components/ErrorView';
import { Screen } from '@/src/components/Screen';
import { useAuth } from '@/src/context/AuthContext';
import { useAppearance } from '@/src/context/AppearanceContext';
import { MealCategory } from '@/src/types/recipe';
import { categoryLabel } from '@/src/utils/recipe';

const CATEGORY_EMOJI: Record<MealCategory, string> = {
  [MealCategory.Breakfast]: '🍳',
  [MealCategory.SecondBreakfast]: '🥐',
  [MealCategory.Lunch]: '🍲',
  [MealCategory.Dinner]: '🌙',
};

export default function DashboardScreen() {
  const { t } = useTranslation();
  const { user } = useAuth();
  const { colors } = useAppearance();

  const categoriesQuery = useQuery({
    queryKey: ['categories'],
    queryFn: fetchCategories,
  });

  const welcome = user?.userName
    ? t('dashboard.welcomeNamed', { name: user.userName })
    : t('dashboard.welcome');

  return (
    <Screen title={welcome} subtitle={t('dashboard.subtitle')}>
      {categoriesQuery.isLoading ? (
        <View style={styles.loading}>
          <ActivityIndicator size="large" color={colors.brand} />
        </View>
      ) : categoriesQuery.isError ? (
        <ErrorView
          message={t('errors.loadCategoriesFailed')}
          onRetry={() => categoriesQuery.refetch()}
        />
      ) : (
        <ScrollView contentContainerStyle={styles.list}>
          <Pressable
            onPress={() => router.push('/(main)/(tabs)/meals')}
            style={({ pressed }) => [
              styles.allCard,
              {
                backgroundColor: colors.brand,
                opacity: pressed ? 0.9 : 1,
              },
            ]}
          >
            <Text style={styles.allTitle}>{t('nav.allMeals')}</Text>
            <Text style={styles.allSubtitle}>{t('dashboard.viewRecipes')}</Text>
          </Pressable>

          <Pressable
            onPress={() => router.push('/(main)/ingredients')}
            style={({ pressed }) => [
              styles.card,
              {
                backgroundColor: colors.surface,
                borderColor: colors.border,
                opacity: pressed ? 0.9 : 1,
              },
            ]}
          >
            <Text style={styles.emoji}>🥬</Text>
            <View style={styles.cardBody}>
              <Text style={[styles.cardTitle, { color: colors.text }]}>{t('nav.ingredientCatalog')}</Text>
              <Text style={[styles.cardCount, { color: colors.textMuted }]}>
                {t('ingredientCatalog.subtitle')}
              </Text>
            </View>
          </Pressable>

          <Pressable
            onPress={() => router.push('/(main)/diet-generator')}
            style={({ pressed }) => [
              styles.card,
              {
                backgroundColor: colors.surface,
                borderColor: colors.border,
                opacity: pressed ? 0.9 : 1,
              },
            ]}
          >
            <Text style={styles.emoji}>✨</Text>
            <View style={styles.cardBody}>
              <Text style={[styles.cardTitle, { color: colors.text }]}>{t('nav.dietGenerator')}</Text>
              <Text style={[styles.cardCount, { color: colors.textMuted }]}>
                {t('generators.diet.subtitle')}
              </Text>
            </View>
          </Pressable>

          <Pressable
            onPress={() => router.push('/(main)/recipe-generator')}
            style={({ pressed }) => [
              styles.card,
              {
                backgroundColor: colors.surface,
                borderColor: colors.border,
                opacity: pressed ? 0.9 : 1,
              },
            ]}
          >
            <Text style={styles.emoji}>🤖</Text>
            <View style={styles.cardBody}>
              <Text style={[styles.cardTitle, { color: colors.text }]}>{t('nav.recipeGenerator')}</Text>
              <Text style={[styles.cardCount, { color: colors.textMuted }]}>
                {t('generators.recipe.subtitle')}
              </Text>
            </View>
          </Pressable>

          {(categoriesQuery.data ?? []).map((item) => (
            <Pressable
              key={item.category}
              onPress={() => router.push(`/(main)/category/${item.category}`)}
              style={({ pressed }) => [
                styles.card,
                {
                  backgroundColor: colors.surface,
                  borderColor: colors.border,
                  opacity: pressed ? 0.9 : 1,
                },
              ]}
            >
              <Text style={styles.emoji}>{CATEGORY_EMOJI[item.category as MealCategory] ?? '🍽️'}</Text>
              <View style={styles.cardBody}>
                <Text style={[styles.cardTitle, { color: colors.text }]}>
                  {categoryLabel(item.category, t)}
                </Text>
                <Text style={[styles.cardCount, { color: colors.textMuted }]}>
                  {t('common.recipeCount', { count: item.count })}
                </Text>
              </View>
            </Pressable>
          ))}
        </ScrollView>
      )}
    </Screen>
  );
}

const styles = StyleSheet.create({
  list: {
    gap: 12,
    paddingBottom: 24,
  },
  allCard: {
    borderRadius: 16,
    padding: 18,
    gap: 4,
  },
  allTitle: {
    color: '#fff',
    fontSize: 20,
    fontWeight: '700',
  },
  allSubtitle: {
    color: 'rgba(255,255,255,0.9)',
    fontSize: 14,
  },
  card: {
    borderWidth: 1,
    borderRadius: 16,
    padding: 16,
    flexDirection: 'row',
    alignItems: 'center',
    gap: 14,
  },
  emoji: {
    fontSize: 28,
  },
  cardBody: {
    flex: 1,
    gap: 2,
  },
  cardTitle: {
    fontSize: 18,
    fontWeight: '600',
  },
  cardCount: {
    fontSize: 14,
  },
  loading: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
    paddingVertical: 40,
  },
});