import { MaterialCommunityIcons } from '@expo/vector-icons';
import { Redirect, router } from 'expo-router';
import { useState } from 'react';
import {
  ActivityIndicator,
  Alert,
  Pressable,
  StyleSheet,
  Text,
  View,
} from 'react-native';

import { Avatar } from '@/components/common/Avatar';
import { Catamaran, FunnelSans } from '@/constants/fonts';
import { Palette } from '@/constants/palette';
import { Radius, Spacing } from '@/constants/styles';
import { useAuth } from '@/providers/AuthProvider';
import { sendTestPushNotification } from '@/services/notifications';

function SettingsRow({
  label,
  description,
  onPress,
}: {
  label: string;
  description: string;
  onPress: () => void;
}) {
  return (
    <Pressable onPress={onPress} style={styles.row}>
      <View style={styles.rowContent}>
        <Text style={styles.rowLabel}>{label}</Text>
        <Text style={styles.rowDescription}>{description}</Text>
      </View>
      <MaterialCommunityIcons
        color={Palette.gray}
        name="chevron-right"
        size={24}
      />
    </Pressable>
  );
}

export default function SettingsScreen() {
  const { initializing, user } = useAuth();
  const [sendingNotification, setSendingNotification] = useState(false);

  if (initializing) {
    return (
      <View style={styles.centered}>
        <ActivityIndicator color={Palette.black} />
      </View>
    );
  }

  if (!user) {
    return <Redirect href="/login" />;
  }

  const registeredPushTokens = user.expoPushTokens?.length ?? 0;

  async function handleSendTestNotification() {
    try {
      setSendingNotification(true);
      await sendTestPushNotification();
      Alert.alert(
        'Notification envoyee',
        'Une notification push de test a ete demandee.'
      );
    } catch (error) {
      const message =
        error instanceof Error
          ? error.message
          : "Impossible d'envoyer la notification.";

      Alert.alert('Erreur', message);
    } finally {
      setSendingNotification(false);
    }
  }

  return (
    <View style={styles.container}>
      <View style={styles.header}>
        <Text style={styles.title}>Settings</Text>
        <Text style={styles.subtitle}>Gere ton compte et ton profil.</Text>
      </View>

      <View style={styles.previewCard}>
        <Avatar
          name={user.username ?? user.email}
          size="md"
          uri={user.profilePicture}
        />

        <View style={styles.previewContent}>
          <Text style={styles.previewTitle}>{user.username || 'Profil'}</Text>
          <Text style={styles.previewSubtitle}>{user.email}</Text>
        </View>
      </View>

      <View style={styles.section}>
        <Text style={styles.sectionTitle}>Account</Text>
        <View style={styles.sectionCard}>
          <SettingsRow
            description="Photo, pseudo, email et dates de creation."
            label="Profile"
            onPress={() => router.push('/profile')}
          />
        </View>
      </View>

      <View style={styles.section}>
        <Text style={styles.sectionTitle}>Notifications</Text>
        <View style={styles.sectionCard}>
          <SettingsRow
            description={
              registeredPushTokens > 0
                ? `${registeredPushTokens} appareil(x) enregistre(s).`
                : 'Aucun appareil enregistre pour les notifications.'
            }
            label="Etat des notifications"
            onPress={() => undefined}
          />
          <SettingsRow
            description={
              sendingNotification
                ? 'Envoi en cours...'
                : 'Envoyer une notification push de test.'
            }
            label="Tester une notification"
            onPress={handleSendTestNotification}
          />
        </View>
      </View>
    </View>
  );
}

const styles = StyleSheet.create({
  centered: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
    backgroundColor: Palette.cream,
  },
  container: {
    flex: 1,
    paddingHorizontal: Spacing.lg,
    paddingTop: Spacing.xl,
    gap: Spacing.lg,
    backgroundColor: Palette.cream,
  },
  header: {
    gap: Spacing.xs,
  },
  title: {
    ...Catamaran.extraBold34,
    color: Palette.black,
  },
  subtitle: {
    ...FunnelSans.regular16,
    color: Palette.gray,
  },
  previewCard: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: Spacing.md,
    padding: Spacing.md,
    borderWidth: 1,
    borderColor: Palette.cream,
    borderRadius: Radius.xl,
    backgroundColor: Palette.white,
  },
  previewContent: {
    flex: 1,
    gap: Spacing.xs,
  },
  previewTitle: {
    ...FunnelSans.medium16,
    color: Palette.black,
  },
  previewSubtitle: {
    ...FunnelSans.medium14,
    color: Palette.gray,
  },
  section: {
    gap: Spacing.sm,
  },
  sectionTitle: {
    ...FunnelSans.medium12,
    color: Palette.gray,
    textTransform: 'uppercase',
  },
  sectionCard: {
    borderWidth: 1,
    borderColor: Palette.cream,
    borderRadius: Radius.sm,
    backgroundColor: Palette.white,
    overflow: 'hidden',
  },
  row: {
    flexDirection: 'row',
    alignItems: 'center',
    gap: Spacing.md,
    paddingHorizontal: Spacing.md,
    paddingVertical: Spacing.sm,
  },
  rowContent: {
    flex: 1,
    gap: Spacing.xs,
  },
  rowLabel: {
    ...FunnelSans.medium16,
    color: Palette.black,
  },
  rowDescription: {
    ...FunnelSans.regular16,
    color: Palette.gray,
  },
});
