import Ionicons from '@expo/vector-icons/Ionicons';
import { StatusBar } from 'expo-status-bar';
import { type Href, useRouter } from 'expo-router';
import React, { useState } from 'react';
import {
  ActivityIndicator,
  Alert,
  Pressable,
  StyleSheet,
  Text,
  View,
} from 'react-native';
import { useSafeAreaInsets } from 'react-native-safe-area-context';

import { useColorScheme } from '@/hooks/use-color-scheme';
import { authClient } from '@/lib/auth/client';

type Palette = {
  canvas: string;
  card: string;
  textPrimary: string;
  textSecondary: string;
  icon: string;
  stroke: string;
  buttonBackground: string;
  buttonText: string;
};

type SettingDestination = {
  key: string;
  label: string;
  route?: Href;
};

const palettes: Record<'dark' | 'light', Palette> = {
  dark: {
    canvas: '#050505',
    card: '#141417',
    textPrimary: '#F5F5F7',
    textSecondary: '#8E8E93',
    icon: '#F5F5F7',
    stroke: '#232327',
    buttonBackground: '#FFFFFF',
    buttonText: '#050505',
  },
  light: {
    canvas: '#F7F7F9',
    card: '#FFFFFF',
    textPrimary: '#131318',
    textSecondary: '#5C5C67',
    icon: '#131318',
    stroke: '#E4E4EA',
    buttonBackground: '#131318',
    buttonText: '#FFFFFF',
  },
};

const destinations: SettingDestination[] = [
  { key: 'change-password', label: 'Change Password', route: '/settings/account' },
  { key: 'terms', label: 'Terms and Policies' },
  { key: 'support', label: 'Feedback and Support' },
];

export default function SettingsHomeScreen() {
  const router = useRouter();
  const insets = useSafeAreaInsets();
  const colorScheme = useColorScheme();
  const palette = palettes[colorScheme === 'dark' ? 'dark' : 'light'];
  const [isLoggingOut, setIsLoggingOut] = useState(false);

  const topInset = Math.max(insets.top, 16);
  const bottomInset = Math.max(insets.bottom + 16, 40);

  const handleNavigate = (destination: SettingDestination) => {
    if (!destination.route) {
      return;
    }
    router.push(destination.route);
  };

  const handleLogOut = async () => {
    if (isLoggingOut) {
      return;
    }

    setIsLoggingOut(true);

    try {
      await authClient.signOut();
      router.replace('/(auth)/login');
    } catch (error) {
      const message =
        error instanceof Error ? error.message : 'Please try again in a moment.';
      Alert.alert('Unable to log out', message);
    } finally {
      setIsLoggingOut(false);
    }
  };

  return (
    <View style={[styles.screen, { paddingTop: topInset, backgroundColor: palette.canvas }]}>
      <StatusBar style={colorScheme === 'dark' ? 'light' : 'dark'} />

      <View style={styles.headerRow}>
        <Pressable
          accessibilityRole="button"
          style={styles.headerControl}
          onPress={() => router.back()}
        >
          <Ionicons name="chevron-back" size={22} color={palette.icon} />
        </Pressable>
        <Text style={[styles.headerTitle, { color: palette.textPrimary }]}>set up</Text>
        <View style={styles.headerControl} />
      </View>

      <View style={styles.content}>
        <View style={[styles.card, { backgroundColor: palette.card }]}>
          {destinations.map((destination, index) => {
            const isLast = index === destinations.length - 1;
            return (
              <Pressable
                key={destination.key}
                accessibilityRole={destination.route ? 'button' : 'none'}
                disabled={!destination.route}
                onPress={() => handleNavigate(destination)}
                style={({ pressed }) => [
                  styles.optionRow,
                  !isLast && { borderBottomWidth: StyleSheet.hairlineWidth, borderBottomColor: palette.stroke },
                  pressed && destination.route && { opacity: 0.6 },
                ]}
              >
                <Text style={[styles.optionLabel, { color: palette.textPrimary }]}>
                  {destination.label}
                </Text>
                <Ionicons name="chevron-forward" size={18} color={palette.textSecondary} />
              </Pressable>
            );
          })}
        </View>
      </View>

      <View style={[styles.footer, { paddingBottom: bottomInset }]}>
        <Pressable
          accessibilityRole="button"
          disabled={isLoggingOut}
          onPress={handleLogOut}
          style={({ pressed }) => [
            styles.logoutButton,
            { backgroundColor: palette.buttonBackground },
            pressed && { opacity: 0.9 },
          ]}
        >
          {isLoggingOut ? (
            <ActivityIndicator size="small" color={palette.buttonText} />
          ) : (
            <Text style={[styles.logoutLabel, { color: palette.buttonText }]}>Log out</Text>
          )}
        </Pressable>
      </View>
    </View>
  );
}

const styles = StyleSheet.create({
  screen: {
    flex: 1,
    paddingHorizontal: 20,
  },
  headerRow: {
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'space-between',
    marginBottom: 32,
  },
  headerControl: {
    width: 44,
    height: 44,
    alignItems: 'center',
    justifyContent: 'center',
  },
  headerTitle: {
    fontSize: 18,
    fontWeight: '600',
    letterSpacing: 0.4,
  },
  content: {
    flex: 1,
  },
  card: {
    borderRadius: 18,
    paddingHorizontal: 20,
  },
  optionRow: {
    flexDirection: 'row',
    alignItems: 'center',
    justifyContent: 'space-between',
    minHeight: 64,
  },
  optionLabel: {
    fontSize: 16,
    fontWeight: '500',
  },
  footer: {
    paddingTop: 32,
  },
  logoutButton: {
    borderRadius: 26,
    height: 56,
    alignItems: 'center',
    justifyContent: 'center',
  },
  logoutLabel: {
    fontSize: 16,
    fontWeight: '600',
  },
});